[xlukkajr]

Hello All

I am interested in building a Variable Frequency Drive for controlling a 3 phase motor .75kw with single phase input.

is there anyone ever saw any similar project on the web from where i can get any ideas


thanks

[eSilviu]

Hello All

I am interested in building a Variable Frequency Drive for controlling a 3 phase motor .75kw with single phase input.

is there anyone ever saw any similar project on the web from where i can get any ideas


thanks

You can make an idea about complexity of the schematics from here:
http://www.turbinemuseum.de/Modellba...blmc__uk_.html
All brushless RC motors are 3 phase motors, controlled with variable frequency [rectangular voltage], but are powered with low voltage/high curent (16V/20A for exampe).
You have not specified what nominal voltage is your motor.

[xlukkajr]

Thanks For the info but it not good for my use

the voltage of my motor is 220v

[eSilviu]

Thanks For the info but it not good for my use
the voltage of my motor is 220v

--is there anyone ever saw any similar project on the web from where i can get any ideas --

you asked for a project from where you can get ideas, not for a ready-to-use solution.
Don't get ilusions, schematic from my link is 10 times simpler than what you need.

[Larken]

On the Microchip website there are a lots of application notes on controlling AC induction and other motors.

http://www.microchip.com/stellent/id...pnote=en012011

You can do it with a 18F pic or a DSP pic

Larry K

[xlukkajr]

Thanks Very much larry