30 Degree phase shift on Space Vector PWM.

Motor

Intellectual 370 points

I transform Va,Vb,Vc 3 phase voltage to Valpha and Vbeta.

After;

I use space vector algorithm and I genarete Vx, Vy, Vz voltages from the Valpha and Vbeta.

But between to Va and Vx, between to Vb and Vy, between to Vc and Vz has 30 Degree phase shift.

I need zero phase shift. How can I cancel this phase shift?

over 16 years ago

0 Bill13027 over 16 years ago

TI__Intellectual 930 points

Try switching Valfa, Vbeta inputs of SVGEN and then compare with three phase voltages.

0 SJU over 16 years ago

Intellectual 665 points

My guess would be that you're either feeding phase to phase voltages when it should be phase to neutral, or the other way. That will introduce 30 degrees error.

Swapping alpha and beta will give 90 degrees.

C2000™︎ microcontrollers

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30 Degree phase shift on Space Vector PWM.