induction motor basics

[ssylee]

I saw on the nameplate of an induction motor that it contains two sets
of voltage and current ratings. I'm wondering why that's the case. Any
explanation of it would be very helpful as I am hard-pressed to find
it on google. Thanks.

 

[Tim Wescott]

ssylee wrote:

I saw on the nameplate of an induction motor that it contains two sets
of voltage and current ratings. I'm wondering why that's the case. Any
explanation of it would be very helpful as I am hard-pressed to find
it on google. Thanks.

Were they off by a factor of two, or a factor of sqrt(3)?

Many motors for industrial use can be wired for one of two different
voltages on installation -- the most common that I know of is to equip
each pole with two windings that you can connect in either series or
parallel for, e.g., 220V or 440V service.

It's also possible (but I don't know how common) to set up a motor to be
connected in either 'Y' or delta configuration, which would give you a
sqrt(3) difference.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html

 

On 3ÔÂ18ČŐ, ĎÂÎç12Ęą18ˇÖ, ssylee <staniga...@gmail.com> wrote:

I saw on the nameplate of an induction motor that it contains two sets
of voltage and current ratings. I'm wondering why that's the case. Any
explanation of it would be very helpful as I am hard-pressed to find
it on google. Thanks.

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[Richard Seriani]

"ssylee" <stanigator@gmail.com> wrote in message
news:41550443-032a-47bf-8b3f-a6c96b61d4f9@e10g2000prf.googlegroups.com...

I saw on the nameplate of an induction motor that it contains two sets
of voltage and current ratings. I'm wondering why that's the case. Any
explanation of it would be very helpful as I am hard-pressed to find
it on google. Thanks.

Was it something like 230/460 Volts and 122/61 Amps?
That would be a dual-voltage motor.

If different, how about being a bit more specific? For instance, give us the
motor manufacturer and model number or at least how the data is displayed.

I can't imagine what you tried searching for that yielded no information,
but try induction+motor+nameplate. Lots of hits which explain nameplate
data.

 

[Bob Woodward]

dirskyster@gmail.com wrote:

On 3ÔÂ18ČŐ, ĎÂÎç12Ęą18ˇÖ, ssylee <staniga...@gmail.com> wrote:
I saw on the nameplate of an induction motor that it contains two sets
of voltage and current ratings. I'm wondering why that's the case. Any
explanation of it would be very helpful as I am hard-pressed to find
it on google. Thanks.

Do you want access to China's massive pool of electronic
manufacturers...

AND DO NOT SPAM "ON TOPIC"
Irritating stupid f*** Chinese SPAMMER

R

 

[John Larkin]

On Tue, 18 Mar 2008 03:02:40 -0700 (PDT), dirskyster@gmail.com wrote:

On 3ÔÂ18ČŐ, ĎÂÎç12Ęą18ˇÖ, ssylee <staniga...@gmail.com> wrote:
I saw on the nameplate of an induction motor that it contains two sets
of voltage and current ratings. I'm wondering why that's the case. Any
explanation of it would be very helpful as I am hard-pressed to find
it on google. Thanks.



Do you want access to China's massive pool of electronic
manufacturers... but lack the time to contact suppliers, negotiate
contracts, arrange shipping or monitor product quality? Don't worry -
Let seriouswholesale deal with all that for you.

*Check out the huge range of Gadgets, MP3 / MP4 Players, Car DVD /
Audio, and Computer Accessories now by visiting the online wholesale
catalog at seriouswholesale. com You'll have peace of mind thanks to
the seriouswholesale Quality Control, 12-month Warranty on all
products, and easy secure payment by credit card through Paypal.

Selling on eBay or your own online store? Send products direct from
our warehouse to your customers using our unique drop-shipping
service. You can profit by selling hundreds of different products,
without holding any of your own inventory! Any questions you have will
be answered by the seriouswholesale English-speaking customer support
team... Their aim is to make your China electronics importing business
easier to run than ever before.

Welcome to http://www.seriouswholesale.com.

seriouswholesale - Buy from the source, profit without the hassle.

- 12 Months Warranty - No minimum order restrictions - Drop-shipping
with no additional fee - Pay by safely by PayPal seriouswholesale
Wholesale Co., Ltd.: Chinas original and best online electronics
wholesaler & drop-shipper: seriouswholesale. com

Seriouswholesale is a pack of thieves who take your money and ship
crap, or ship nothing.

Spread the word.

John

 

[Bob Eld]

"ssylee" <stanigator@gmail.com> wrote in message
news:41550443-032a-47bf-8b3f-a6c96b61d4f9@e10g2000prf.googlegroups.com...

I saw on the nameplate of an induction motor that it contains two sets
of voltage and current ratings. I'm wondering why that's the case. Any
explanation of it would be very helpful as I am hard-pressed to find
it on google. Thanks.

It simply has double windings that can be wired in series for one voltage
and in parallel for half the voltage. For example, 240 vs. 120 Volts. For
half the voltage, the current would double.

The winding connections can be found in the connection box on the motor or
at one end of the motor depending on size. The leads are ether numbered or
color coded and there should be a connection diagram, probably on the
connection box cover plate or the motor name plate that shows how to connect
for the two voltages.

 

[Michael A. Terrell]

Bob Woodward wrote:

dirskyster@gmail.com wrote:
On 3ÔÂ18ČŐ, ĎÂÎç12Ęą18ˇÖ, ssylee <staniga...@gmail.com> wrote:
I saw on the nameplate of an induction motor that it contains two sets
of voltage and current ratings. I'm wondering why that's the case. Any
explanation of it would be very helpful as I am hard-pressed to find
it on google. Thanks.

Do you want access to China's massive pool of electronic
manufacturers...

AND DO NOT SPAM "ON TOPIC"
Irritating stupid f*** Chinese SPAMMER

R

Install Newsproxy and use:

* drop From:*skyster@gmail.com* to drop his crap on every newsgroup.


--
aioe.org is home to cowards and terrorists

Add this line to your news proxy nfilter.dat file
* drop Path:*aioe.org!not-for-mail to drop all aioe.org traffic.

http://improve-usenet.org/index.html

 

[Paul Herber]

On Tue, 18 Mar 2008 14:07:02 -0700 (PDT), dirskyster@gmail.com wrote:

Do you want

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Every post by seriouswholesale is a vote for the Dalai Lama.




--
Regards, Paul Herber, Sandrila Ltd.
Electronics for Visio http://www.electronics.sandrila.co.uk/

 

On 3ÔÂ18ČŐ, ĎÂÎç12Ęą18ˇÖ, ssylee <staniga...@gmail.com> wrote:

I saw on the nameplate of an induction motor that it contains two sets
of voltage and current ratings. I'm wondering why that's the case. Any
explanation of it would be very helpful as I am hard-pressed to find
it on google. Thanks.

Do you want access to China's massive pool of electronic
manufacturers... but lack the time to contact suppliers, negotiate
contracts, arrange shipping or monitor product quality? Don't worry -
Let seriouswholesale deal with all that for you.

*Check out the huge range of Gadgets, MP3 / MP4 Players, Car DVD /
Audio, and Computer Accessories now by visiting the online wholesale
catalog at seriouswholesale. com You'll have peace of mind thanks to
the seriouswholesale Quality Control, 12-month Warranty on all
products, and easy secure payment by credit card through Paypal.

Selling on eBay or your own online store? Send products direct from
our warehouse to your customers using our unique drop-shipping
service. You can profit by selling hundreds of different products,
without holding any of your own inventory! Any questions you have will
be answered by the seriouswholesale English-speaking customer support
team... Their aim is to make your China electronics importing business
easier to run than ever before.

Welcome to http://www.seriouswholesale.com.

seriouswholesale - Buy from the source, profit without the hassle.

- 12 Months Warranty - No minimum order restrictions - Drop-shipping
with no additional fee - Pay by safely by PayPal seriouswholesale
Wholesale Co., Ltd.: Chinas original and best online electronics
wholesaler & drop-shipper: seriouswholesale. com

 

[Jamie]

ssylee wrote:

I saw on the nameplate of an induction motor that it contains two sets
of voltage and current ratings. I'm wondering why that's the case. Any
explanation of it would be very helpful as I am hard-pressed to find
it on google. Thanks.
So you can use it on either or voltage settings..

It'll show you the wiring diagram you need to perform
to set it.
Low/high usually a 230/460 or near that ball park..
the higher voltages take half the current than that
of the lower voltage.
Normally, this is found in AC 3 phase motors and maybe
a DC shunt motor with 2 voltage fields.

http://webpages.charter.net/jamie_5"

 

On 3ÔÂ18ČŐ, ĎÂÎç12Ęą18ˇÖ, ssylee <staniga...@gmail.com> wrote:

I saw on the nameplate of an induction motor that it contains two sets
of voltage and current ratings. I'm wondering why that's the case. Any
explanation of it would be very helpful as I am hard-pressed to find
it on google. Thanks.

Do you want access to China's massive pool of electronic
manufacturers... but lack the time to contact suppliers, negotiate
contracts, arrange shipping or monitor product quality? Don't worry -
Let seriouswholesale deal with all that for you.

*Check out the huge range of Gadgets, MP3 / MP4 Players, Car DVD /
Audio, and Computer Accessories now by visiting the online wholesale
catalog at seriouswholesale. com You'll have peace of mind thanks to
the seriouswholesale Quality Control, 12-month Warranty on all
products, and easy secure payment by credit card through Paypal.

Selling on eBay or your own online store? Send products direct from
our warehouse to your customers using our unique drop-shipping
service. You can profit by selling hundreds of different products,
without holding any of your own inventory! Any questions you have will
be answered by the seriouswholesale English-speaking customer support
team... Their aim is to make your China electronics importing business
easier to run than ever before.

Welcome to http://www.seriouswholesale.com.

seriouswholesale - Buy from the source, profit without the hassle.

- 12 Months Warranty - No minimum order restrictions - Drop-shipping
with no additional fee - Pay by safely by PayPal seriouswholesale
Wholesale Co., Ltd.: Chinas original and best online electronics
wholesaler & drop-shipper: seriouswholesale. com