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Part Number: TMDSHVMTRINSPIN
Tool/software: Code Composer Studio
I am using motorware 15 stack , a resolver feedback ( using a ti resolver to digital conversion kit ) with a PMSM as my setup. I am using Lab5a with resolver electrical angle through SPI. This setup was working well .
When I ramped motor rpm near to base rpm ( around 6000rpm at 400Vdc without field weakening), I have noticed that the motor is producing a jerk with a higher negative current ( around -250Adc). Few rpms before that point the motor is starting to produce a hum and then producing the jerk with negative current. At that time inverter IGBT drivers are getting trip.
Have anyone of you experienced this ? what should be the courses for this and how can I solve this?
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In reply to Himanshu Chaudhary60:
In reply to Yanming Luo:
In reply to Lakshan:
When I do some experiment on this, I noticed that Vs and the motor voltage V line to line is not liner. Is this expected result or should Vs and motor voltage in a liner relation?
I kept Vs constant by injecting negative d axis currents to get the readings.
Bus voltage was 64Vdc
Could sorted out Vs limiting by changing USER_MAX_VS_MAG_PU which is setting outMax to the PID run. And waiting for answers for other two questions. Regarding graph and the explanation on operating gMotorVars.Vs is close to _IQ(0.5) as you mentioned.
1. Increase the dc bus voltage.
2. Or increase the USER_MAX_VS_MAG_PU, and refer to lab10a to implement the over-modulation.
Both cases, need to tune the gains of speed PI regulator for high speed.
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