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BOOSTXL-3PHGANINV: 3 Phase Motor winding configuration requirements

Tom Bowen
Prodigy 60 points
Part Number: BOOSTXL-3PHGANINV
Other Parts Discussed in Thread: MOTORWARE,

I'm working on a new design 3 phase PMSM motor.  It is a low inductance two-pole machine to operate at very high speeds.

I'm having difficulty getting repeatable inductance and resistance values during the motor ID process (MotorWare Lab02d).

Is there a required or recommended electrical configuration to interface with the BOOSTXL-3PhGanINV evaluation board (Delta, Star-Delta, Etc)?

I'm currently driving the board with 20 volts DC. And have the R/L estimation frequency (USER_R_OVER_L_EST_FREQ_Hz) at 300Hz.

Thank you,

-Tom

  • 0
    TI__Mastermind 23165 points

    Tom,

    I've looped in our motor drive team, who should follow up shortly. Thanks for choosing TI!

  • 0 in reply to Carolus Andrews
    TI__Guru** 115620 points

    You may refer to chapter 5.2 (Hardware Prerequisites) of InstaSPIN-FOC and InstaSPIN-MOTION User's Guide (Rev. H) (http://www.ti.com/lit/ug/spruhj1h/spruhj1h.pdf) to have a detailed description of this.

     

    1. Set correct parameters based on the hardware board in user.h

    #define USER_IQ_FULL_SCALE_VOLTAGE_V           (xx)

    #define USER_VOLTAGE_FILTER_POLE_Hz               (xx)

    #define USER_ADC_FULL_SCALE_VOLTAGE_V       (xx)

    #define USER_IQ_FULL_SCALE_CURRENT_A           (xx)

    #define USER_ADC_FULL_SCALE_CURRENT_A       (xx)

    2. Change the sign of the current coefficient in HAL_readAdcData() in hal.h,

    static inline void HAL_readAdcData(HAL_Handle handle,HAL_AdcData_t *pAdcData)

    {

       _iq current_sf = HAL_getCurrentScaleFactor(handle);

    }

    3. And you can follow the instaSPIN lab guide to use lab01b and lab01c to verify the hardware and device configuration.

    Btw, both wye and delta use the same connection to the inverter, you don't need to care what wire type of the motor for InstaSPIN.