Hi Team,
The customer wants to know whether it is feasible to add inductors to the three phases of the brushless DC motor to reduce the slope and amplitude of the drive current, thereby reducing the temperature rise of the motor.
He uses DRV8323RS to drive a three-phase brushless DC motor using six-step square wave control. Motor voltage is 24V, maximum current is 4.52A, phase resistance: 0.245Ω, phase inductance: 30uH.
Using 70% duty cycle drive, the motor temperature rise is relatively high. Try adding inductors in series with the three phases of the motor. The temperature rise is reduced, the driving current of the three phases is reduced, and the current slope is also reduced.
1. Is there any secondary usage? Is there a theoretical basis for the selection of inductor?
2. Are there any other ways to reduce the temperature rise of the motor?
Regards,
Annie
