FPGA Central

I need help about controlling the speed of an ac trifasic motor, thanks

> I need help about controlling the speed of an ac trifasic motor, thanks

the speed goes linear with the frequency of your 3-phase inputs to the
mortor - just change the frequency? or maybe have a look at
http://www.catb.org/~esr/faqs/smart-questions.html


bye,
Michael

I'm looking about methods for controlling these kind of motors, my
motor is with the specifications:

P = 400W
Poles = 4
V = 220V
rpm max = 3520 rpm
I = 3.7A
I need help about how to controlling the current and voltaje that not
affect the FPGA, what part of the project i can do with the FPGA, i
have an Xilinx Spartan 3 Board s200, thanks.

feedcaseg wrote:
> I'm looking about methods for controlling these kind of motors, my
> motor is with the specifications:
>
> P = 400W
> Poles = 4
> V = 220V
> rpm max = 3520 rpm
> I = 3.7A
> I need help about how to controlling the current and voltaje that not
> affect the FPGA, what part of the project i can do with the FPGA, i
> have an Xilinx Spartan 3 Board s200, thanks.
>

Your motor is irrelevant for the FPGA side, the motor will be driven by
some "IGBT bricks", what you can do in the FPGA is the PWM (pulse with
modulation) to control the frequency of your 3 phase synthesized sinus
waves, and many more control loops, over drive protection, speed
control, position control, thermal protection, and many other nice things.

Most of the microcontrollers these days can perform these things for ~4
USD, but nobody can stop you to design the motor controller using a
spartan3.

Aurash

This is just for impementing un a new technology, i have doubts about
how to configure the fpga and how to use the expansion ports, what pins
are enabled for I / O, how can i configure them. I have the archive
in excel about the pins, what can i choose?

feedcaseg wrote:
> This is just for impementing un a new technology, i have doubts about
> how to configure the fpga and how to use the expansion ports, what pins
> are enabled for I / O, how can i configure them. I have the archive
> in excel about the pins, what can i choose?
>
In this case a more usefull aproach is to learn about FPGAs in general,
then try something simple like a counter, then make a PWM based on the
same counter and so on.
Have fun,
Aurash