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Hello Everyone,
I was trying to control the speed of an AC motor using a Triac (BT139). I am triggering the Triac using an optocoupler (MOC3021)through a microcontroller. I am detecting the ac zero crossing and then deciding the firing angle to control the average voltage which is to be provided to the motor for speed control. My question is I came to know about the concept of freewheeling in DC motor circuits and wanted to know whether it is required in AC motor speed control circuits or not? If yes then how it can be implemented? and If not then why it is not required?
Thanks in advance.
I was trying to control the speed of an AC motor using a Triac (BT139). I am triggering the Triac using an optocoupler (MOC3021)through a microcontroller. I am detecting the ac zero crossing and then deciding the firing angle to control the average voltage which is to be provided to the motor for speed control. My question is I came to know about the concept of freewheeling in DC motor circuits and wanted to know whether it is required in AC motor speed control circuits or not? If yes then how it can be implemented? and If not then why it is not required?
Thanks in advance.