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TMS320F2800157: Motor is not running smooth and speed oscillation is more

Shankar Prabhakaran
Intellectual 320 points
Part Number: TMS320F2800157
Other Parts Discussed in Thread: C2000WARE, DRV8353

Working on custom board development and motor is running successfully in custom board .

1)Facing issues in motor running .its oscillates too much .which are the parameters need to consider to reduce oscillation ?

2)Its taking high current and some times initially running in reverse direction after few second started running in forward direction .How to avoid such issues ?

3)is there any way to control motor torque and which are the calibration parameter is required to change motor torque.

4)if motor parameters are updated and make motor_identifications = true, no need to identified again but still expression windows not showing the updated value from user_mtr.h  .

every time need to enter the motor parameter values in expression window.which is not updated directly from user_mtr.h

Thanks in Advance

Regards

Shankar Prabhakaran

  • 0
    TI__Expert 5650 points

    Hi Shankar,

    What example project in the MotorControl SDK are you referring to?

    Could you provide more details? What type is your motor and are you running the motor in sensorless FOC? What speed estimation method you are using?

    Thanks,

    Jiaxin

  • 0 in reply to Jiaxin Teng
    Intellectual 320 points

    Hi @Jiaxin,

    Thanks for your reply.

    Q:What example project in the Motor Control SDK are you referring to?
     
    A:Used Motor Control SDK is "C2000Ware_Motor Control_SDK_5_01_00_00"  Taken reference from F280025C and adapted to F2800157 .All the changes validated in Drv8353 . Finally, moved the code to custom board.

    Q:Could you provide more details? What type is your motor and are you running the motor in
    sensorless FOC? What speed estimation method you are using?

    A: Actually its a Mid-drive motor .When running through sensorless it is fine but right now run through sensored one(HALL Feedback) facing issue in motor oscillation and starting face.May be i will share motor spec through a private message.

    Thanks in advance.

    Regards

    Shankar

  • +1 in reply to Shankar Prabhakaran
    TI__Expert 5650 points

    Hi Shankar,

    Shankar Prabhakaran said:
    A:Used Motor Control SDK is "C2000Ware_Motor Control_SDK_5_01_00_00"  Taken reference from F280025C and adapted to F2800157 .All the changes validated in Drv8353 . Finally, moved the code to custom board.

    What solution you are referring to? Is that universal motor lab? Good to know that you have validated with DRV8353.

    Shankar Prabhakaran said:
    A: Actually its a Mid-drive motor .When running through sensorless it is fine but right now run through sensored one(HALL Feedback) facing issue in motor oscillation and starting face.

    Okay, could you share the current waveform under sensorless and sensored conditions? 

    Thanks,

    Jiaxin