Hello Gentlemen,
I'm curious as to how AC servo motors are driven or be specific how is commutation achieved. With DC motors of its variety PWM is used with MOSFETS/IGBTs. AC motors controlled with VFDs, again use PWM and IGBTs.
Is an AC servo drive designed partly like a VFD with the AC signal being simulated using PWM ?
And what do they mean by an amplifier when referring to servo drives, does it really amplifies the voltage or is it a misnomer for using low voltage to switch higher voltage?
Thanks
Kal
I'm curious as to how AC servo motors are driven or be specific how is commutation achieved. With DC motors of its variety PWM is used with MOSFETS/IGBTs. AC motors controlled with VFDs, again use PWM and IGBTs.
Is an AC servo drive designed partly like a VFD with the AC signal being simulated using PWM ?
And what do they mean by an amplifier when referring to servo drives, does it really amplifies the voltage or is it a misnomer for using low voltage to switch higher voltage?
Thanks
Kal