Three-phase PWM generator in VHDL

[Giuseppeł]

Hello,
Is there anybody, that know where I can find a free source code to generate
a three-phase PWM to drive an AC motor with the SpartanII Fpga?

Or I have to write myself ?

Thank you for your attention
--
--
Ciao
Giuseppe

 

[Rene Tschaggelar]

Giuseppeł wrote:

Hello,
Is there anybody, that know where I can find a free source code to generate
a three-phase PWM to drive an AC motor with the SpartanII Fpga?

Or I have to write myself ?

Well, there is the PWM to modulate the voltages.
Then the voltage has to be somewhat proportional to the frequency and
finally the current has to be fed back to control the frequency.

What all of this do you wish to do in an FPGA ?

Rene
--
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net

 

[Giuseppeł]

Hello,
Is there anybody, that know where I can find a free source code to
generate
a three-phase PWM to drive an AC motor with the SpartanII Fpga?

Or I have to write myself ?

Well, there is the PWM to modulate the voltages.
Then the voltage has to be somewhat proportional to the frequency and
finally the current has to be fed back to control the frequency.

What all of this do you wish to do in an FPGA ?

<CUT>

Thank you for your attention,
I'm interesting only in the PWM to modulate the voltage.
All the other is done with a uP.
I know that is only al counter to do a triangular wave and a compare to set
the output.
But there are also the dead-time and the circuit to cut the impulse with
duration < dead_time.
And other little thinghs.
My first target is something like the Hitachi ITU three-phase PWM generator
function.
The best would be something like the IC BMA828.

Bye
Giuseppe

 

[Mike]

I am working with one now. You have to be clear in your requirements, such
as
1) Short circuit detection/shutdown
2) Dead Time
3) Cycle reference (usualy 8 khz)
4) Typically the Phase A, B and C signals have an inverse.
5) Are you using a gate drive (ie IGBT)?
6) Motors produce lotsa noise, any feedback to prevent motor damage (see
item 1) should contain a debounce to validate logic levels.

fabbl



"Giuseppeł" <miaooaim.REMOVETHIS@tiscali.it> wrote in message
news:2i829fFkbfktU1@uni-berlin.de...

Hello,
Is there anybody, that know where I can find a free source code to
generate
a three-phase PWM to drive an AC motor with the SpartanII Fpga?

Or I have to write myself ?

Thank you for your attention
--
--
Ciao
Giuseppe