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TMS320F28035: HVMotorCtr+PFC kit

Essam HUSSAIN
Prodigy 100 points
Part Number: TMS320F28035


Hi

I have a problem with HVMotorCtr kit.

When I increased the dc link voltage from 0 to more than 40V, the speed signals read becomes noisy and lots of distortion. When I increased the voltage to 100V the reading of the motor speed drops to zero.

Does anyone give me an advice or help? 

Regards