BOOSTXL-DRV8320S: In MotorControlSDK do I have to ID the motor or can I type in values from the motor datasheet?

Kustaa Nyholm

Expert 2005 points

Part Number: BOOSTXL-DRV8320S

I have motor that has following parameters as per datasheet:

coil resistance 0.245 Ohm

coil inductance 30 µH

but when I ID this I get:

#define USER_MOTOR_NUM_POLE_PAIRS (1)

#define USER_MOTOR_Rs_Ohm (0.1913)
#define USER_MOTOR_Ls_d_H (3.95e-6)
#define USER_MOTOR_Ls_q_H (3.95e-6)
#define USER_MOTOR_RATED_FLUX_VpHz (0.0126)

The resistance is not that far off but the inductance is 10x too small.

Are the USER_MOTOR_Rs_Ohm and USER_MOTOR_Ls_d_H values per winding coil or are they values as measured from motor wires?

Does the Instaspin assume delta or star configuration for the motor?

wbr Kusti

over 3 years ago

0 Yanming Luo over 3 years ago

TI__Guru** 109760 points

InstaSPIN assumes the wing type of motor is wye, but the instaSPIN can support delta type also, it will automatic convert the identified parameters from delta to wye if the motor parameters are identified.

You might take a look at chapter 6.8 (Setting PMSM Motor Parameters in user.h) of InstaSPIN User's Guide (SPRUHJ1H, http://www.ti.com/lit/ug/spruhj1h/spruhj1h.pdf that has a detailed description of this topic.

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BOOSTXL-DRV8320S: In MotorControlSDK do I have to ID the motor or can I type in values from the motor datasheet?