Speed control of 3 phase induction motor

Thread Starter

han

Joined Oct 25, 2007
5
hi guys,im new to tis forum
currently im doin a project bout design a cicuit to control the speed of a 3 phase induction motor, i already hav the inverter circuit, but im having a problem to get the firing circuit.do anyone have a sample for this?really thank you if can give me a hand here...
 

Thread Starter

han

Joined Oct 25, 2007
5
thankz,but im doing a manually speed control circuit..is there any simple circuit that doesn't require any pic or plc?thankz lot for da help
 

Thread Starter

han

Joined Oct 25, 2007
5
oh.means to control the speed of an induction motor we still need a microprocessor la?theres no other way?
 

thingmaker3

Joined May 16, 2005
5,084
Of course there are other ways. But they are far more complicated and less reliable than using a microprocessor. You could, for example, gang together a control to simultaneously vary both motor supply voltage and the frequency from a VCO. It would be quite challenging to design and adjust, though. You would have to do a lot more soldering, too. In the long run, it would probably be more expensive as well. And less reliable. But you could do it.
 
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