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I am unaware of any way to make an ofline induction motor generateOn Jul 29, 1:44 am, cl...@snyder.on.ca wrote:
On Tue, 28 Jul 2009 12:12:29 -0700 (PDT), harry
susan.armit...@virgin.net> wrote:
On Jul 25, 7:40 pm, Bart Bervoets <sunnyl...@online.be> wrote:
Well, i personally would like someone to explain this windmill thing
to me as i would like to build one and i too have tried to use an
induction motor and failed.
Some people suggest using a large servo motor.
How can i make some good micro wind turbines?
Bart Bervoets
Induction motors can be used to generate but only in whilst connected
to another AC electricity supply.
Wrong.
An induction motor works well as a generator with the proper
caspacitors connected. 3 phase works best and they are always
available cheap used. They need to turn just over nameplate rpm and
need to be spun up with no load. They are impossible to overload -
they shut themselves down when overloaded
Basically you have to run it it up as a motor when it will achieve a
speed a little below synchronous speed.
Then, you have to bring in your power source & make it run faster. As
it comes up to synchronous speed, the current drawn will fall to
zero. When you drive it faster than synchronous speed, it will start
to generate and put electrical power out. So, to use this power, your
electric fire (say) will be connected in parallel with the induction
motor/generater (proper name ASYNCHRONOUS GENEATOR) and the power
company supply.
The speed has to be regulated so that it is not overloaded, it will
generate the same power as it consumes as a motor.
But it has to remain in parallel with the external AC power supply at
all times.
Simple eh!
Bit here on the subject.
http://en.wikipedia.org/wiki/Induction_generator
No capacitors needed. There are a couple of errors in the Wikipedia
thing too.
Why would you need capacitors?
Three phase, single phase makes no difference.
This a thing I did at college years ago on a motor test set. It was
part of the course. It's not a big deal.
The capacitors supply the feild current (off phase) to make it work.
OK, so just like any other generator then. Thanks.On Wed, 29 Jul 2009 07:26:07 -0700, "Ulysses"
therealulysses@yahoo.com> wrote:
clare@snyder.on.ca> wrote in message
news:2l6v65p8riqgvr87pvn2sf81e4o8pukf4e@4ax.com...
On Tue, 28 Jul 2009 12:12:29 -0700 (PDT), harry
susan.armitage@virgin.net> wrote:
On Jul 25, 7:40 pm, Bart Bervoets <sunnyl...@online.be> wrote:
Well, i personally would like someone to explain this windmill thing
to me as i would like to build one and i too have tried to use an
induction motor and failed.
Some people suggest using a large servo motor.
How can i make some good micro wind turbines?
Bart Bervoets
Induction motors can be used to generate but only in whilst connected
to another AC electricity supply.
Wrong.
An induction motor works well as a generator with the proper
caspacitors connected. 3 phase works best and they are always
available cheap used. They need to turn just over nameplate rpm and
need to be spun up with no load. They are impossible to overload -
they shut themselves down when overloaded
According to Mr. Unknown in Alternator Secrets you also need to flash it
with 12 volts (or thereabouts) to get it to start generating.
You may need to do that ONCE on a motor that's been sitting unused for
a long time. As soon as it has been used as a motor or generator a
residual feild is established in the motor which will remain as long
as it is used on a semi-regulat basis.
At least on
some motors. So for a wind generator I assume you would need to find one
that doesn't need to be flashed, or at least will hold some residual
magnetism for a while. I have not tried this washing machine motor
trick
yet but I guess I'll have to just so I'll know... Let's see: 1/3 HP=250
watts (roughly) so it looks like the hard part would be finding a small
enough engine if somone wanted to make a gasoline-powered generator.
Basically you have to run it it up as a motor when it will achieve a
speed a little below synchronous speed.
Then, you have to bring in your power source & make it run faster. As
it comes up to synchronous speed, the current drawn will fall to
zero. When you drive it faster than synchronous speed, it will start
to generate and put electrical power out. So, to use this power, your
electric fire (say) will be connected in parallel with the induction
motor/generater (proper name ASYNCHRONOUS GENEATOR) and the power
company supply.
The speed has to be regulated so that it is not overloaded, it will
generate the same power as it consumes as a motor.
But it has to remain in parallel with the external AC power supply at
all times.
Simple eh!
Bit here on the subject.
http://en.wikipedia.org/wiki/Induction_generator
Jamie wrote:
Michael A. Terrell wrote:
Jamie wrote:
Michael A. Terrell wrote:
John Fields wrote:
On Sat, 25 Jul 2009 17:06:18 -0400, Hammy <spamme@hotmail.com> wrote:
On Fri, 24 Jul 2009 21:49:24 -0700, "Richardson" <member@newsguy.com
wrote:
http://www.powergeneration.siemens.com/products-solutions-services/power-plant-soln/windpower/
I work with German engineers and Japanese engineers long before you were
born don't chuknow?. They don't care about a few of my glitches here and
there, and I don't care about their glitches neither, many Japanese
engineers can't speak English. English is defined as communication tool,
not artificial intelligence as you think don't chu know dumbasses?
My guess would be you where hired through some sort of affirmative
action program.
A lot of large corporations have similar hiring practices as the
government; i.e. we must hire so many minorities, so many women, and
so many disabled and whatever the current politically correct BS is.
From your post's I would guess you fall in the disabled category
specifically mentally disabled.
We have a mentally disabled mail courier here. I could introduce you
to her, if you're interested?
---
Probably not a wise decision, since their progeny might have political
ambitions.
JF
Now he's trying to pimp his mother.
Not nice to talk about mother.
Then don't. You mother obviously didn't teach you anything useful.
Least of all, how to write anything intelligent.
My mother would of bitched slapped you and put you up for adoption if
she pushed out you.
And when it comes to writing anything intelligent, that is an opinion
of the reader. Since it's you that is making this opinion, I consider
the source.
I've never seen you post anything interesting here. Most likely
because you are a person with little value that has little mans disease.
Do you ever post anything that makes ANY sense?
That's never been your strong point, has it?
Michael A. Terrell wrote:
Do you ever post anything that makes ANY sense?
That's never been your strong point, has it?
My mother would of bitched slapped you and put you up for adoption if
she pushed out you.
There is no DC anywhere in an induction motor/generator. Go back &"harry" <susan.armit...@virgin.net> wrote in message
news:a53619ed-cc05-4f1f-9470-423f48bf811b@k19g2000yqn.googlegroups.com...
On Jul 29, 1:44 am, cl...@snyder.on.ca wrote:
On Tue, 28 Jul 2009 12:12:29 -0700 (PDT), harry
susan.armit...@virgin.net> wrote:
On Jul 25, 7:40 pm, Bart Bervoets <sunnyl...@online.be> wrote:
Well, i personally would like someone to explain this windmill thing
to me as i would like to build one and i too have tried to use an
induction motor and failed.
Some people suggest using a large servo motor.
How can i make some good micro wind turbines?
Bart Bervoets
Induction motors can be used to generate but only in whilst connected
to another AC electricity supply.
Wrong.
An induction motor works well as a generator with the proper
caspacitors connected. 3 phase works best and they are always
available cheap used. They need to turn just over nameplate rpm and
need to be spun up with no load. They are impossible to overload -
they shut themselves down when overloaded
Basically you have to run it it up as a motor when it will achieve a
speed a little below synchronous speed.
Then, you have to bring in your power source & make it run faster. As
it comes up to synchronous speed, the current drawn will fall to
zero. When you drive it faster than synchronous speed, it will start
to generate and put electrical power out. So, to use this power, your
electric fire (say) will be connected in parallel with the induction
motor/generater (proper name ASYNCHRONOUS GENEATOR) and the power
company supply.
The speed has to be regulated so that it is not overloaded, it will
generate the same power as it consumes as a motor.
But it has to remain in parallel with the external AC power supply at
all times.
Simple eh!
Bit here on the subject.
http://en.wikipedia.org/wiki/Induction_generator
No capacitors needed. There are a couple of errors in the Wikipedia
thing too.
Why would you need capacitors?
Three phase, single phase makes no difference.
This a thing I did at college years ago on a motor test set. It was
part of the course. It's not a big deal.
I don't know why you need capacitors but every induction generator I've
worked on had one. Why *don't* you need one? Heck, I don't even know what
the capacitor does in this case. Are you saying all you need to do is hook
up a load and flash it by connecting a battery across the output leads
(neutral and hot)? Do all induction motors need to be flashed if they don't
have a capacitor, or does it even matter? Will it automatically establish
itself at 60 Hz (assuming it's a 60 Hz motor) if ran at a little over the
rated speed? Do they need to achieve a specific speed (rpm) in order to
start producing electricity? Is that why Bart's wind generator didn't work?
Is Bart still with us?
Now I have to go take something apart so I can hook up an old washing
machine motor...
Why did Siemens hire you?http://www.powergeneration.siemens.com/products-solutions-services/po...
I work with German engineers and Japanese engineers long before you were
born don't chuknow?. They don't care about a few of my glitches here and
there, and I don't care about their glitches neither, many Japanese
engineers can't speak English. English is defined as communication tool,
not artificial intelligence as you think don't chu know dumbasses?
Induction generators cannot develop a magnetic field on the rotor unlessOn Jul 29, 1:44 am, cl...@snyder.on.ca wrote:
On Tue, 28 Jul 2009 12:12:29 -0700 (PDT), harry
susan.armit...@virgin.net> wrote:
On Jul 25, 7:40 pm, Bart Bervoets <sunnyl...@online.be> wrote:
Well, i personally would like someone to explain this windmill thing
to me as i would like to build one and i too have tried to use an
induction motor and failed.
Some people suggest using a large servo motor.
How can i make some good micro wind turbines?
Bart Bervoets
Induction motors can be used to generate but only in whilst connected
to another AC electricity supply.
Wrong.
An induction motor works well as a generator with the proper
caspacitors connected. 3 phase works best and they are always
available cheap used. They need to turn just over nameplate rpm and
need to be spun up with no load. They are impossible to overload -
they shut themselves down when overloaded
Basically you have to run it it up as a motor when it will achieve a
speed a little below synchronous speed.
Then, you have to bring in your power source & make it run faster. As
it comes up to synchronous speed, the current drawn will fall to
zero. When you drive it faster than synchronous speed, it will start
to generate and put electrical power out. So, to use this power, your
electric fire (say) will be connected in parallel with the induction
motor/generater (proper name ASYNCHRONOUS GENEATOR) and the power
company supply.
The speed has to be regulated so that it is not overloaded, it will
generate the same power as it consumes as a motor.
But it has to remain in parallel with the external AC power supply at
all times.
Simple eh!
Bit here on the subject.
http://en.wikipedia.org/wiki/Induction_generator
No capacitors needed. There are a couple of errors in the Wikipedia
thing too.
Why would you need capacitors?
Three phase, single phase makes no difference.
This a thing I did at college years ago on a motor test set. It was
part of the course. It's not a big deal.
What I thought you said was that they needed to be started at a slower speedOn Jul 30, 2:13 am, "Ulysses" <therealulys...@yahoo.com> wrote:
"harry" <susan.armit...@virgin.net> wrote in message
news:a53619ed-cc05-4f1f-9470-423f48bf811b@k19g2000yqn.googlegroups.com...
On Jul 29, 1:44 am, cl...@snyder.on.ca wrote:
On Tue, 28 Jul 2009 12:12:29 -0700 (PDT), harry
susan.armit...@virgin.net> wrote:
On Jul 25, 7:40 pm, Bart Bervoets <sunnyl...@online.be> wrote:
Well, i personally would like someone to explain this windmill
thing
to me as i would like to build one and i too have tried to use an
induction motor and failed.
Some people suggest using a large servo motor.
How can i make some good micro wind turbines?
Bart Bervoets
Induction motors can be used to generate but only in whilst
connected
to another AC electricity supply.
Wrong.
An induction motor works well as a generator with the proper
caspacitors connected. 3 phase works best and they are always
available cheap used. They need to turn just over nameplate rpm and
need to be spun up with no load. They are impossible to overload -
they shut themselves down when overloaded
Basically you have to run it it up as a motor when it will achieve
a
speed a little below synchronous speed.
Then, you have to bring in your power source & make it run faster.
As
it comes up to synchronous speed, the current drawn will fall to
zero. When you drive it faster than synchronous speed, it will
start
to generate and put electrical power out. So, to use this power,
your
electric fire (say) will be connected in parallel with the
induction
motor/generater (proper name ASYNCHRONOUS GENEATOR) and the power
company supply.
The speed has to be regulated so that it is not overloaded, it will
generate the same power as it consumes as a motor.
But it has to remain in parallel with the external AC power supply
at
all times.
Simple eh!
Bit here on the subject.
http://en.wikipedia.org/wiki/Induction_generator
No capacitors needed. There are a couple of errors in the Wikipedia
thing too.
Why would you need capacitors?
Three phase, single phase makes no difference.
This a thing I did at college years ago on a motor test set. It was
part of the course. It's not a big deal.
I don't know why you need capacitors but every induction generator I've
worked on had one. Why *don't* you need one? Heck, I don't even know
what
the capacitor does in this case. Are you saying all you need to do is
hook
up a load and flash it by connecting a battery across the output leads
(neutral and hot)? Do all induction motors need to be flashed if they
don't
have a capacitor, or does it even matter? Will it automatically
establish
itself at 60 Hz (assuming it's a 60 Hz motor) if ran at a little over
the
rated speed? Do they need to achieve a specific speed (rpm) in order to
start producing electricity? Is that why Bart's wind generator didn't
work?
Is Bart still with us?
Now I have to go take something apart so I can hook up an old washing
machine motor...
There is no DC anywhere in an induction motor/generator. Go back &
read the post carefully.
Only single phase induction motors have a capacitor in series with the
start winding. This shifts the phase angle slighly so that the motor
will self-start.
Three phase induction motor stator produces a revolving flux that
makes the motor self starting.
Induction motors do not run at synchronous speed, they run slightly
slower.
Well, I read it three times so far and it didn't sink in so maybe a few moreAgain read the post.
Get read up on the theory of induction motors.
Start with this:- http://en.wikipedia.org/wiki/Induction_motor
phase with caps to make single phase power)On Jul 30, 2:13 am, "Ulysses" <therealulys...@yahoo.com> wrote:
"harry" <susan.armit...@virgin.net> wrote in message
news:a53619ed-cc05-4f1f-9470-423f48bf811b@k19g2000yqn.googlegroups.com...
On Jul 29, 1:44 am, cl...@snyder.on.ca wrote:
On Tue, 28 Jul 2009 12:12:29 -0700 (PDT), harry
susan.armit...@virgin.net> wrote:
On Jul 25, 7:40 pm, Bart Bervoets <sunnyl...@online.be> wrote:
Well, i personally would like someone to explain this windmill thing
to me as i would like to build one and i too have tried to use an
induction motor and failed.
Some people suggest using a large servo motor.
How can i make some good micro wind turbines?
Bart Bervoets
Induction motors can be used to generate but only in whilst connected
to another AC electricity supply.
Wrong.
An induction motor works well as a generator with the proper
caspacitors connected. 3 phase works best and they are always
available cheap used. They need to turn just over nameplate rpm and
need to be spun up with no load. They are impossible to overload -
they shut themselves down when overloaded
Basically you have to run it it up as a motor when it will achieve a
speed a little below synchronous speed.
Then, you have to bring in your power source & make it run faster. As
it comes up to synchronous speed, the current drawn will fall to
zero. When you drive it faster than synchronous speed, it will start
to generate and put electrical power out. So, to use this power, your
electric fire (say) will be connected in parallel with the induction
motor/generater (proper name ASYNCHRONOUS GENEATOR) and the power
company supply.
The speed has to be regulated so that it is not overloaded, it will
generate the same power as it consumes as a motor.
But it has to remain in parallel with the external AC power supply at
all times.
Simple eh!
Bit here on the subject.
http://en.wikipedia.org/wiki/Induction_generator
No capacitors needed. There are a couple of errors in the Wikipedia
thing too.
Why would you need capacitors?
Three phase, single phase makes no difference.
This a thing I did at college years ago on a motor test set. It was
part of the course. It's not a big deal.
I don't know why you need capacitors but every induction generator I've
worked on had one. Why *don't* you need one? Heck, I don't even know what
the capacitor does in this case. Are you saying all you need to do is hook
up a load and flash it by connecting a battery across the output leads
(neutral and hot)? Do all induction motors need to be flashed if they don't
have a capacitor, or does it even matter? Will it automatically establish
itself at 60 Hz (assuming it's a 60 Hz motor) if ran at a little over the
rated speed? Do they need to achieve a specific speed (rpm) in order to
start producing electricity? Is that why Bart's wind generator didn't work?
Is Bart still with us?
Now I have to go take something apart so I can hook up an old washing
machine motor...
There is no DC anywhere in an induction motor/generator. Go back &
read the post carefully.
Only single phase induction motors have a capacitor in series with the
start winding. This shifts the phase angle slighly so that the motor
will self-start.
Three phase induction motor stator produces a revolving flux that
makes the motor self starting.
Induction motors do not run at synchronous speed, they run slightly
slower.
Again read the post.
Get read up on the theory of induction motors.
Start with this:- http://en.wikipedia.org/wiki/Induction_motor
I know the theory of induction motors.I've run induction generator (3
the slip factor (phase shift) and voltage is affected by the phaseharry wrote:
On Jul 29, 1:44 am, cl...@snyder.on.ca wrote:
On Tue, 28 Jul 2009 12:12:29 -0700 (PDT), harry
susan.armit...@virgin.net> wrote:
On Jul 25, 7:40 pm, Bart Bervoets <sunnyl...@online.be> wrote:
Well, i personally would like someone to explain this windmill thing
to me as i would like to build one and i too have tried to use an
induction motor and failed.
Some people suggest using a large servo motor.
How can i make some good micro wind turbines?
Bart Bervoets
Induction motors can be used to generate but only in whilst connected
to another AC electricity supply.
Wrong.
An induction motor works well as a generator with the proper
caspacitors connected. 3 phase works best and they are always
available cheap used. They need to turn just over nameplate rpm and
need to be spun up with no load. They are impossible to overload -
they shut themselves down when overloaded
Basically you have to run it it up as a motor when it will achieve a
speed a little below synchronous speed.
Then, you have to bring in your power source & make it run faster. As
it comes up to synchronous speed, the current drawn will fall to
zero. When you drive it faster than synchronous speed, it will start
to generate and put electrical power out. So, to use this power, your
electric fire (say) will be connected in parallel with the induction
motor/generater (proper name ASYNCHRONOUS GENEATOR) and the power
company supply.
The speed has to be regulated so that it is not overloaded, it will
generate the same power as it consumes as a motor.
But it has to remain in parallel with the external AC power supply at
all times.
Simple eh!
Bit here on the subject.
http://en.wikipedia.org/wiki/Induction_generator
No capacitors needed. There are a couple of errors in the Wikipedia
thing too.
Why would you need capacitors?
Three phase, single phase makes no difference.
This a thing I did at college years ago on a motor test set. It was
part of the course. It's not a big deal.
Induction generators cannot develop a magnetic field on the rotor unless
there is a current in the stator. The magnetic field formed in the
stator induces current in the rotor bars to create the rotor's magnetic
field.
Because the two fields are displaced electrically, simple in-phase
current in the stator will not work. Capacitor(s) across the line will
shift the stator current to lead the voltage and help maintain the
magnetic current to induce rotor current. Without them, the voltage
output quickly collapses.
Frequency control and voltage control of induction generators is pretty
wild and unruly.
All these things are avoided if you connect the stator to another AC
source. The other source provides the excitation energy to induce
currents into the rotor for its magnetic field, and stabilize the
voltage/frequency of the system.
daestrom
You are correct - frequency is a result of prime mover RPM, fudged by
Bit of an oxymoron their. At synchronous speed, there is no inductionOn Thu, 30 Jul 2009 18:24:31 -0400, daestrom <daestrom@twcny.rr.com
wrote:
harry wrote:
On Jul 29, 1:44 am, cl...@snyder.on.ca wrote:
On Tue, 28 Jul 2009 12:12:29 -0700 (PDT), harry
susan.armit...@virgin.net> wrote:
On Jul 25, 7:40 pm, Bart Bervoets <sunnyl...@online.be> wrote:
Well, i personally would like someone to explain this windmill thing
to me as i would like to build one and i too have tried to use an
induction motor and failed.
Some people suggest using a large servo motor.
How can i make some good micro wind turbines?
Bart Bervoets
Induction motors can be used to generate but only in whilst connected
to another AC electricity supply.
Wrong.
An induction motor works well as a generator with the proper
caspacitors connected. 3 phase works best and they are always
available cheap used. They need to turn just over nameplate rpm and
need to be spun up with no load. They are impossible to overload -
they shut themselves down when overloaded
Basically you have to run it it up as a motor when it will achieve a
speed a little below synchronous speed.
Then, you have to bring in your power source & make it run faster. As
it comes up to synchronous speed, the current drawn will fall to
zero. When you drive it faster than synchronous speed, it will start
to generate and put electrical power out. So, to use this power, your
electric fire (say) will be connected in parallel with the induction
motor/generater (proper name ASYNCHRONOUS GENEATOR) and the power
company supply.
The speed has to be regulated so that it is not overloaded, it will
generate the same power as it consumes as a motor.
But it has to remain in parallel with the external AC power supply at
all times.
Simple eh!
Bit here on the subject.
http://en.wikipedia.org/wiki/Induction_generator
No capacitors needed. There are a couple of errors in the Wikipedia
thing too.
Why would you need capacitors?
Three phase, single phase makes no difference.
This a thing I did at college years ago on a motor test set. It was
part of the course. It's not a big deal.
Induction generators cannot develop a magnetic field on the rotor unless
there is a current in the stator. The magnetic field formed in the
stator induces current in the rotor bars to create the rotor's magnetic
field.
Because the two fields are displaced electrically, simple in-phase
current in the stator will not work. Capacitor(s) across the line will
shift the stator current to lead the voltage and help maintain the
magnetic current to induce rotor current. Without them, the voltage
output quickly collapses.
Frequency control and voltage control of induction generators is pretty
wild and unruly.
All these things are avoided if you connect the stator to another AC
source. The other source provides the excitation energy to induce
currents into the rotor for its magnetic field, and stabilize the
voltage/frequency of the system.
daestrom
You are correct - frequency is a result of prime mover RPM, fudged by
the slip factor (phase shift) and voltage is affected by the phase
shift as well. And phase shift is affected by load - so the
frequency/voltage/rmp/load soup gets interesting.
A synchronous induction generator is simpler.
Your post is describing the starting mechanisms of induction *motors*.On Jul 30, 2:13 am, "Ulysses" <therealulys...@yahoo.com> wrote:
"harry" <susan.armit...@virgin.net> wrote in message
news:a53619ed-cc05-4f1f-9470-423f48bf811b@k19g2000yqn.googlegroups.com...
On Jul 29, 1:44 am, cl...@snyder.on.ca wrote:
On Tue, 28 Jul 2009 12:12:29 -0700 (PDT), harry
susan.armit...@virgin.net> wrote:
On Jul 25, 7:40 pm, Bart Bervoets <sunnyl...@online.be> wrote:
Well, i personally would like someone to explain this windmill thing
to me as i would like to build one and i too have tried to use an
induction motor and failed.
Some people suggest using a large servo motor.
How can i make some good micro wind turbines?
Bart Bervoets
Induction motors can be used to generate but only in whilst connected
to another AC electricity supply.
Wrong.
An induction motor works well as a generator with the proper
caspacitors connected. 3 phase works best and they are always
available cheap used. They need to turn just over nameplate rpm and
need to be spun up with no load. They are impossible to overload -
they shut themselves down when overloaded
Basically you have to run it it up as a motor when it will achieve a
speed a little below synchronous speed.
Then, you have to bring in your power source & make it run faster. As
it comes up to synchronous speed, the current drawn will fall to
zero. When you drive it faster than synchronous speed, it will start
to generate and put electrical power out. So, to use this power, your
electric fire (say) will be connected in parallel with the induction
motor/generater (proper name ASYNCHRONOUS GENEATOR) and the power
company supply.
The speed has to be regulated so that it is not overloaded, it will
generate the same power as it consumes as a motor.
But it has to remain in parallel with the external AC power supply at
all times.
Simple eh!
Bit here on the subject.
http://en.wikipedia.org/wiki/Induction_generator
No capacitors needed. There are a couple of errors in the Wikipedia
thing too.
Why would you need capacitors?
Three phase, single phase makes no difference.
This a thing I did at college years ago on a motor test set. It was
part of the course. It's not a big deal.
I don't know why you need capacitors but every induction generator I've
worked on had one. Why *don't* you need one? Heck, I don't even know what
the capacitor does in this case. Are you saying all you need to do is hook
up a load and flash it by connecting a battery across the output leads
(neutral and hot)? Do all induction motors need to be flashed if they don't
have a capacitor, or does it even matter? Will it automatically establish
itself at 60 Hz (assuming it's a 60 Hz motor) if ran at a little over the
rated speed? Do they need to achieve a specific speed (rpm) in order to
start producing electricity? Is that why Bart's wind generator didn't work?
Is Bart still with us?
Now I have to go take something apart so I can hook up an old washing
machine motor...
There is no DC anywhere in an induction motor/generator. Go back &
read the post carefully.
Only single phase induction motors have a capacitor in series with the
start winding. This shifts the phase angle slighly so that the motor
will self-start.
Three phase induction motor stator produces a revolving flux that
makes the motor self starting.
Induction motors do not run at synchronous speed, they run slightly
slower.
Again read the post.
Get read up on the theory of induction motors.
Start with this:- http://en.wikipedia.org/wiki/Induction_motor
Jamie wrote:
Michael A. Terrell wrote:
Jamie wrote:
Michael A. Terrell wrote:
John Fields wrote:
On Sat, 25 Jul 2009 17:06:18 -0400, Hammy <spamme@hotmail.com
wrote:
On Fri, 24 Jul 2009 21:49:24 -0700, "Richardson"
member@newsguy.com
wrote:
http://www.powergeneration.siemens.com/products-solutions-services/power-plant-soln/windpower/
I work with German engineers and Japanese engineers long before
you were
born don't chuknow?. They don't care about a few of my glitches
here and
there, and I don't care about their glitches neither, many
Japanese
engineers can't speak English. English is defined as
communication tool,
not artificial intelligence as you think don't chu know dumbasses?
My guess would be you where hired through some sort of affirmative
action program.
A lot of large corporations have similar hiring practices as the
government; i.e. we must hire so many minorities, so many women,
and
so many disabled and whatever the current politically correct BS
is.
From your post's I would guess you fall in the disabled category
specifically mentally disabled.
We have a mentally disabled mail courier here. I could introduce
you
to her, if you're interested?
---
Probably not a wise decision, since their progeny might have
political
ambitions.
JF
Now he's trying to pimp his mother.
Not nice to talk about mother.
Then don't. You mother obviously didn't teach you anything useful.
Least of all, how to write anything intelligent.
My mother would of bitched slapped you and put you up for adoption if
she pushed out you.
And when it comes to writing anything intelligent, that is an opinion
of the reader. Since it's you that is making this opinion, I consider
the source.
I've never seen you post anything interesting here. Most likely
because you are a person with little value that has little mans disease.
Do you ever post anything that makes ANY sense?
--
You can't have a sense of humor, if you have no sense!
---"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in message
news:4A70C15C.4525939F@earthlink.net...
Jamie wrote:
Michael A. Terrell wrote:
Jamie wrote:
Michael A. Terrell wrote:
John Fields wrote:
On Sat, 25 Jul 2009 17:06:18 -0400, Hammy <spamme@hotmail.com
wrote:
On Fri, 24 Jul 2009 21:49:24 -0700, "Richardson"
member@newsguy.com
wrote:
http://www.powergeneration.siemens.com/products-solutions-services/power-plant-soln/windpower/
I work with German engineers and Japanese engineers long before
you were
born don't chuknow?. They don't care about a few of my glitches
here and
there, and I don't care about their glitches neither, many
Japanese
engineers can't speak English. English is defined as
communication tool,
not artificial intelligence as you think don't chu know dumbasses?
My guess would be you where hired through some sort of affirmative
action program.
A lot of large corporations have similar hiring practices as the
government; i.e. we must hire so many minorities, so many women,
and
so many disabled and whatever the current politically correct BS
is.
From your post's I would guess you fall in the disabled category
specifically mentally disabled.
We have a mentally disabled mail courier here. I could introduce
you
to her, if you're interested?
---
Probably not a wise decision, since their progeny might have
political
ambitions.
JF
Now he's trying to pimp his mother.
Not nice to talk about mother.
Then don't. You mother obviously didn't teach you anything useful.
Least of all, how to write anything intelligent.
My mother would of bitched slapped you and put you up for adoption if
she pushed out you.
And when it comes to writing anything intelligent, that is an opinion
of the reader. Since it's you that is making this opinion, I consider
the source.
I've never seen you post anything interesting here. Most likely
because you are a person with little value that has little mans disease.
Do you ever post anything that makes ANY sense?
--
You can't have a sense of humor, if you have no sense!
Now you know why every body calls Michael A-hole a piece of shit.
If you are in the USA, and it was a single (pair of) pole machine,"harry" <susan.armit...@virgin.net> wrote in message
news:7cc2e48a-b38d-476f-b170-9857f6b86574@e27g2000yqm.googlegroups.com...> On Jul 30, 2:13 am, "Ulysses" <therealulys...@yahoo.com> wrote:
"harry" <susan.armit...@virgin.net> wrote in message
news:a53619ed-cc05-4f1f-9470-423f48bf811b@k19g2000yqn.googlegroups.com...
On Jul 29, 1:44 am, cl...@snyder.on.ca wrote:
On Tue, 28 Jul 2009 12:12:29 -0700 (PDT), harry
susan.armit...@virgin.net> wrote:
On Jul 25, 7:40 pm, Bart Bervoets <sunnyl...@online.be> wrote:
Well, i personally would like someone to explain this windmill
thing
to me as i would like to build one and i too have tried to use an
induction motor and failed.
Some people suggest using a large servo motor.
How can i make some good micro wind turbines?
Bart Bervoets
Induction motors can be used to generate but only in whilst
connected
to another AC electricity supply.
Wrong.
An induction motor works well as a generator with the proper
caspacitors connected. 3 phase works best and they are always
available cheap used. They need to turn just over nameplate rpm and
need to be spun up with no load. They are impossible to overload -
they shut themselves down when overloaded
Basically you have to run it it up as a motor when it will achieve
a
speed a little below synchronous speed.
Then, you have to bring in your power source & make it run faster.
As
it comes up to synchronous speed, the current drawn will fall to
zero. When you drive it faster than synchronous speed, it will
start
to generate and put electrical power out. So, to use this power,
your
electric fire (say) will be connected in parallel with the
induction
motor/generater (proper name ASYNCHRONOUS GENEATOR) and the power
company supply.
The speed has to be regulated so that it is not overloaded, it will
generate the same power as it consumes as a motor.
But it has to remain in parallel with the external AC power supply
at
all times.
Simple eh!
Bit here on the subject.
http://en.wikipedia.org/wiki/Induction_generator
No capacitors needed. There are a couple of errors in the Wikipedia
thing too.
Why would you need capacitors?
Three phase, single phase makes no difference.
This a thing I did at college years ago on a motor test set. It was
part of the course. It's not a big deal.
I don't know why you need capacitors but every induction generator I've
worked on had one. Why *don't* you need one? Heck, I don't even know
what
the capacitor does in this case. Are you saying all you need to do is
hook
up a load and flash it by connecting a battery across the output leads
(neutral and hot)? Do all induction motors need to be flashed if they
don't
have a capacitor, or does it even matter? Will it automatically
establish
itself at 60 Hz (assuming it's a 60 Hz motor) if ran at a little over
the
rated speed? Do they need to achieve a specific speed (rpm) in order to
start producing electricity? Is that why Bart's wind generator didn't
work?
Is Bart still with us?
Now I have to go take something apart so I can hook up an old washing
machine motor...
There is no DC anywhere in an induction motor/generator. Go back &
read the post carefully.
Only single phase induction motors have a capacitor in series with the
start winding. This shifts the phase angle slighly so that the motor
will self-start.
Three phase induction motor stator produces a revolving flux that
makes the motor self starting.
Induction motors do not run at synchronous speed, they run slightly
slower.
What I thought you said was that they needed to be started at a slower speed
and then the speed was increased once it started producing power. I think
I'm not understanding what you mean by "synchronous speed." Are you
refering only to grid-connections?
Again read the post.
Get read up on the theory of induction motors.
Start with this:-http://en.wikipedia.org/wiki/Induction_motor
Well, I read it three times so far and it didn't sink in so maybe a few more
times....
On Jul 30, 2:13 am, "Ulysses" <therealulys...@yahoo.com> wrote:On Jul 31, 1:35 am, "Ulysses" <therealulys...@yahoo.com> wrote:
"harry" <susan.armit...@virgin.net> wrote in message
news:7cc2e48a-b38d-476f-b170-9857f6b86574@e27g2000yqm.googlegroups.com...
Is this something that was known or theorized before they were first built,"harry" <susan.armit...@virgin.net> wrote in message
news:a53619ed-cc05-4f1f-9470-423f48bf811b@k19g2000yqn.googlegroups.com...
On Jul 29, 1:44 am, cl...@snyder.on.ca wrote:
On Tue, 28 Jul 2009 12:12:29 -0700 (PDT), harry
susan.armit...@virgin.net> wrote:
On Jul 25, 7:40 pm, Bart Bervoets <sunnyl...@online.be> wrote:
Well, i personally would like someone to explain this
windmill
thing
to me as i would like to build one and i too have tried to
use an
induction motor and failed.
Some people suggest using a large servo motor.
How can i make some good micro wind turbines?
Bart Bervoets
Induction motors can be used to generate but only in whilst
connected
to another AC electricity supply.
Wrong.
An induction motor works well as a generator with the proper
caspacitors connected. 3 phase works best and they are always
available cheap used. They need to turn just over nameplate rpm
and
need to be spun up with no load. They are impossible to
overload -
they shut themselves down when overloaded
Basically you have to run it it up as a motor when it will
achieve
a
speed a little below synchronous speed.
Then, you have to bring in your power source & make it run
faster.
As
it comes up to synchronous speed, the current drawn will fall
to
zero. When you drive it faster than synchronous speed, it
will
start
to generate and put electrical power out. So, to use this
power,
your
electric fire (say) will be connected in parallel with the
induction
motor/generater (proper name ASYNCHRONOUS GENEATOR) and the
power
company supply.
The speed has to be regulated so that it is not overloaded, it
will
generate the same power as it consumes as a motor.
But it has to remain in parallel with the external AC power
supply
at
all times.
Simple eh!
Bit here on the subject.
http://en.wikipedia.org/wiki/Induction_generator
No capacitors needed. There are a couple of errors in the
Wikipedia
thing too.
Why would you need capacitors?
Three phase, single phase makes no difference.
This a thing I did at college years ago on a motor test set. It
was
part of the course. It's not a big deal.
I don't know why you need capacitors but every induction generator
I've
worked on had one. Why *don't* you need one? Heck, I don't even
know
what
the capacitor does in this case. Are you saying all you need to do
is
hook
up a load and flash it by connecting a battery across the output
leads
(neutral and hot)? Do all induction motors need to be flashed if
they
don't
have a capacitor, or does it even matter? Will it automatically
establish
itself at 60 Hz (assuming it's a 60 Hz motor) if ran at a little
over
the
rated speed? Do they need to achieve a specific speed (rpm) in
order to
start producing electricity? Is that why Bart's wind generator
didn't
work?
Is Bart still with us?
Now I have to go take something apart so I can hook up an old
washing
machine motor...
There is no DC anywhere in an induction motor/generator. Go back &
read the post carefully.
Only single phase induction motors have a capacitor in series with the
start winding. This shifts the phase angle slighly so that the motor
will self-start.
Three phase induction motor stator produces a revolving flux that
makes the motor self starting.
Induction motors do not run at synchronous speed, they run slightly
slower.
What I thought you said was that they needed to be started at a slower
speed
and then the speed was increased once it started producing power. I
think
I'm not understanding what you mean by "synchronous speed." Are you
refering only to grid-connections?
Again read the post.
Get read up on the theory of induction motors.
Start with this:-http://en.wikipedia.org/wiki/Induction_motor
Well, I read it three times so far and it didn't sink in so maybe a few
more
times....
If you are in the USA, and it was a single (pair of) pole machine,
synchronous speed would be 3600 rpm. If it was a two (pairs of) pole
machine, synchronous speed would be 1800 rpm, three poles 1200 rpm.
and so forth.
The frequency of your AC mains electricity in the USA is 60cycles/
second.
Here in the UK it's 50 c/s (or Herz as we say)
A synchronous motor runs at synchronous speed. An induction motor runs
at slightly less.
The stator of a (say) three phase induction motor makes a revolving
flux revolving at synchronous speed divided by the number of poles
(the way it's wound that is).
The rotor revolves in the same direction. As there is no physical
connection, the current in the rotor is induced by the revolving flux
in exactly the same way as a transformer. However if it were
revolving at exactly the same speed as the magnetic flux no current
would be induce because the rotor conductors would not cut any flux.
So it has to go a bit slower.
So, would a typical 3-phase alternator which has the rotating field coilsAll transformer maths applies to the induction motor. Except that the
frequency in the "secondary" side (ie the rotor) is very low, only 3
or 4 c/s
A synchronous motor has a magnetic field in the rotor which is not
induced, it iis an electro magnet (though lately some have permanent
magnets)
It could indeed. It could be no other!"harry" <susan.armit...@virgin.net> wrote in message
news:46f0e60e-6869-4203-84c1-ef9ab8f3b230@d4g2000yqa.googlegroups.com...> On Jul 31, 1:35 am, "Ulysses" <therealulys...@yahoo.com> wrote:
"harry" <susan.armit...@virgin.net> wrote in message
news:7cc2e48a-b38d-476f-b170-9857f6b86574@e27g2000yqm.googlegroups.com...
On Jul 30, 2:13 am, "Ulysses" <therealulys...@yahoo.com> wrote:> > > > "harry" <susan.armit...@virgin.net> wrote in message
news:a53619ed-cc05-4f1f-9470-423f48bf811b@k19g2000yqn.googlegroups.com...
On Jul 29, 1:44 am, cl...@snyder.on.ca wrote:
On Tue, 28 Jul 2009 12:12:29 -0700 (PDT), harry
susan.armit...@virgin.net> wrote:
On Jul 25, 7:40 pm, Bart Bervoets <sunnyl...@online.be> wrote:
Well, i personally would like someone to explain this
windmill
thing
to me as i would like to build one and i too have tried to
use an
induction motor and failed.
Some people suggest using a large servo motor.
How can i make some good micro wind turbines?
Bart Bervoets
Induction motors can be used to generate but only in whilst
connected
to another AC electricity supply.
Wrong.
An induction motor works well as a generator with the proper
caspacitors connected. 3 phase works best and they are always
available cheap used. They need to turn just over nameplate rpm
and
need to be spun up with no load. They are impossible to
overload -
they shut themselves down when overloaded
Basically you have to run it it up as a motor when it will
achieve
a
speed a little below synchronous speed.
Then, you have to bring in your power source & make it run
faster.
As
it comes up to synchronous speed, the current drawn will fall
to
zero. When you drive it faster than synchronous speed, it
will
start
to generate and put electrical power out. So, to use this
power,
your
electric fire (say) will be connected in parallel with the
induction
motor/generater (proper name ASYNCHRONOUS GENEATOR) and the
power
company supply.
The speed has to be regulated so that it is not overloaded, it
will
generate the same power as it consumes as a motor.
But it has to remain in parallel with the external AC power
supply
at
all times.
Simple eh!
Bit here on the subject.
http://en.wikipedia.org/wiki/Induction_generator
No capacitors needed. There are a couple of errors in the
Wikipedia
thing too.
Why would you need capacitors?
Three phase, single phase makes no difference.
This a thing I did at college years ago on a motor test set. It
was
part of the course. It's not a big deal.
I don't know why you need capacitors but every induction generator
I've
worked on had one. Why *don't* you need one? Heck, I don't even
know
what
the capacitor does in this case. Are you saying all you need to do
is
hook
up a load and flash it by connecting a battery across the output
leads
(neutral and hot)? Do all induction motors need to be flashed if
they
don't
have a capacitor, or does it even matter? Will it automatically
establish
itself at 60 Hz (assuming it's a 60 Hz motor) if ran at a little
over
the
rated speed? Do they need to achieve a specific speed (rpm) in
order to
start producing electricity? Is that why Bart's wind generator
didn't
work?
Is Bart still with us?
Now I have to go take something apart so I can hook up an old
washing
machine motor...
There is no DC anywhere in an induction motor/generator. Go back &
read the post carefully.
Only single phase induction motors have a capacitor in series with the
start winding. This shifts the phase angle slighly so that the motor
will self-start.
Three phase induction motor stator produces a revolving flux that
makes the motor self starting.
Induction motors do not run at synchronous speed, they run slightly
slower.
What I thought you said was that they needed to be started at a slower
speed
and then the speed was increased once it started producing power. I
think
I'm not understanding what you mean by "synchronous speed." Are you
refering only to grid-connections?
Again read the post.
Get read up on the theory of induction motors.
Start with this:-http://en.wikipedia.org/wiki/Induction_motor
Well, I read it three times so far and it didn't sink in so maybe a few
more
times....
If you are in the USA, and it was a single (pair of) pole machine,
synchronous speed would be 3600 rpm. If it was a two (pairs of) pole
machine, synchronous speed would be 1800 rpm, three poles 1200 rpm.
and so forth.
The frequency of your AC mains electricity in the USA is 60cycles/
second.
Here in the UK it's 50 c/s (or Herz as we say)
A synchronous motor runs at synchronous speed. An induction motor runs
at slightly less.
The stator of a (say) three phase induction motor makes a revolving
flux revolving at synchronous speed divided by the number of poles
(the way it's wound that is).
The rotor revolves in the same direction. As there is no physical
connection, the current in the rotor is induced by the revolving flux
in exactly the same way as a transformer. However if it were
revolving at exactly the same speed as the magnetic flux no current
would be induce because the rotor conductors would not cut any flux.
So it has to go a bit slower.
Is this something that was known or theorized before they were first built,
or was it discovered the hard way?
All transformer maths applies to the induction motor. Except that the
frequency in the "secondary" side (ie the rotor) is very low, only 3
or 4 c/s
A synchronous motor has a magnetic field in the rotor which is not
induced, it iis an electro magnet (though lately some have permanent
magnets)
So, would a typical 3-phase alternator which has the rotating field coils
fed directly by brushes and slip rings be called a synchronous generator?