I am looking to build a 3 phase inverter to control an induction motor. What would be the best way to go about this? I am looking to control the inverter bridge through a microcontroller with a DC source variac to feed the inverter. I know there are a few ways of doing it, but which is the best route to go down?
This is a project and I must build at much as the drive as I can without buying things that do things for me. I am looking to either use PWM techniques or a six step voltage source to run the motor effectively. Any ideas?
Ok guys, I have a DC source variac to supply the inverter circuitry. However, this DC souce must be altered in accordance with the frequency to maintain the air flux gap, therefore I am going to build a DC-DC buck boost converter to control the DC voltage into the inverter. The inverter will then switch this DC voltage to generate a six step square wave across the 3 phase induction motor. Can anyone see any problems with doing this?