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How can motor run in reverse direction? And problem related SpeedRef_krpm

Amtech
Genius 4595 points

Other Parts Discussed in Thread: TMS320F28069F

Dear all/Chris,

I am using TMS320F28069F controller and motorware13 example lab02a. My motor data are 415V, 50Hz, 2900Rpm, 13.3Amp, 2Pole, 7.5kW.

1.

My motor is running in forward direction on speed is 600RPM (gMotorVars.SpeedRef_krpm = _IQ(0.6)) Now I want to run motor in reverse direction in same speed 600RPM, than what I have to change in code. Note that I want to change direction in running condition.

2.

I faced problem related set speed and actual motor running speed. I set gMotorVars.SpeedRef_krpm = _IQ(0.6) means 600Rpm where actual motor running at 604 RPM (measure with RPM meter and oscilloscope.) What could be reason? Same found on different speeds.

-Suprit