I am going to implement the field oriented control of three phase induction motor. I need below given operating modes of the ADC and PWM:
1) Time base of the PWM operates asynchronously of the AD conversion i.e. AD conversion is started arbitrarily in respect to the PWM period. In this mode the PWM carrier frequency is variable.
2) Time base of the PWM operates synchronously with the AD conversion i.e. AD conversion is started by some specific points during the PWM period. In this mode the PWM carrier frequency is fixed.
Regardless of the operating mode the sampling period of the AD has to be fixed. Can anybody give me an advice which MCU is suitable for my application i.e. which DSC is capable to ensure dynamic switching between both the above mentioned modes and also ensure fixed sampling period? Thanks for any ideas.