Current Peak Control of Brushless DC Motor Based on DSP

doi:10.12068/j.issn.1005-3026.2016.07.002

Abstract

Abstract: To realize the square-wave current of high-power brushless DC motor (BLDCM)， a current peak control strategy using PWM_ON_PWM modulation mode was proposed and the control principle was described in detail. Then the concrete implementation plan was given. Through the direct control of the non-commutation phase current， the response speed of the system was improved and the desired square-wave current waveform was almost achieved， then the torque ripple of the motor was reduced finally. The simulation model of BLDCM was set up by PLECS to achieve the current peak control strategy. The experiment platform for current peak control of BLDCM was set up by DSP control chip. The simulation and experiment results showed that this control strategy can not only achieve the square-wave control， but also control the switching frequency of the power switching devices.

Key words: brushless DC motor, square wave, current peak control, simulation, experiment

CLC Number:

TM301.2

BIAN Chun-yuan， XUE Sheng-xian， LI Shi-yin， KANG Miao-miao. Current Peak Control of Brushless DC Motor Based on DSP[J]. Journal of Northeastern University Natural Science, 2016, 37(7): 918-921.

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