Part Number:DRV8323R
Hi,
I am using a DRV8323H for running a BLDC motor, with 6x PWM configuration.
I am able to run the motor successfully. to the required speed. Now the problem is at the current limit of the motor.
I am using 3x 0.001ohm of Current sense resistor for the current sense, for the reference of the Driver with he Gain of 40.
I tried connecting 18K resistor between VDS and DVDD( Which is the max Current limit), but the motor stops when i hold its shaft( Motor is consuming about 12Amps of current required limit is about 40Amps).
Then i connected a 0 Ohm between VDS and DVDD which disables the current limit. Even after that the motor is not consuming current ( even after the motor is consuming about 12amps of current when shaft is held to stall).
The motors winding Inductance is 0.004mH and the resistance is 0.1 ohm. I am presently using the PWM of 7Khz. I hope the pwm frequency is not limiting the current of the motor.
Please suggest how do i increase the current limit on the Driver.
Shivu