Simulation Research on Field Weakening Control of Permanent Magnet Brushless DC Motor for Vehicle
The torque and rotation rate of the permanent magnet brushless DC motor will affect the control accura-cy on motors.In order to improve the overall control performance,a method of simulating the field weakening control of permanent magnet brushless DC motor of vehicle was proposed.At first,the field weakening torque characteristics were analyzed,and then the electromagnetic torque relationship of the motor was obtained.According to the result,a field weakening control system was constructed.After that,the system was used to control the electromagnetic torque and operation efficiency of the field weakening.Finally,the overall control was achieved.Experimental results prove the effectiveness of the method after the motor operation test and stability test.
Permanent magnet brushless DC motorField weakening controlTorque characteristicsEquivalent circuit lossStator copper loss
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