Tool/software:
Hi team:
We use the InstaSpin-foc . Do you have any idea what may be the reason for the current spike
Application: Driving 400V 30kw motor
Problem:
1. when Speed up, the current spike comes
2. at high speed around 550hz, the stable state, the spike comes every current period
We have checked following things
1. Current sensing: the plot of the AD is the same to scope.Gain and stop frequency are good.
2. Phase voltage:
2.1 the plot of the AD is the same to scope.
2.2 the pole frequecy is 557Hz, because the max current frequency is 660Hz.
2.3 set the pole frequecy 350hz, spike comes a little bit early, but no big difference
2.4 set the pole frequecy 1000hz, spike comes a little bit later, but no big difference
3. The spike is caused by the switching pwm, we check the scope plot of current and pwm,which means the hardware switching is ok
4. Adjust PID: no big change of the current.
5. Give some angle compensaion for the delay of the electric angle, no big difference.
We have checked possible reasons, no good result
Do you have any idea what may be the reason
