基于梯形波反电动势的BLDCM霍尔位置矫正策略

主要阐述了一种无刷直流电机(BLDCM)的霍尔传感器位置在线矫正策略.传统的BLDCM的霍尔传感器的矫正方式多为直接在电机本体上移动霍尔传感器,这种方式需要拆卸电机,因而在电机调试过程中是相当复杂的.本文主要通过母线电压和母线电流来获取电机换相过程的时间,确定霍尔位置传感器的最优超前角,达到在线修正霍尔位置的目的.最后以含3个霍尔位置传感器的三相两导通模式的BLDCM为仿真对象,并通过Matlab仿真平台对所提出策略加以验证,仿真结果证明该策略能够有效地在线修正霍尔位置偏移角,使得电机的相电流趋于平稳并达到正常运行模式,最后证实了方案的可行性与有效性.

BLDCM Holzer Position Correction Strategy Based on Trapezoid Wave Back EMF

This paper proposed a position compensation method for brushless DC motors with trapezodial back-EMFs. The conventional compensation method of Hall sensors is very complex because of its moving hall sensors on motor body .In this paper, the bus voltage and bus current were used to obtain the commutation time of the BLDC motor, and the optimal advance angle of Hall sensors was determined to achieve the purpose of correcting the Hall position. Finally, the simulation results based on BLDCM with three Hall sensors in the three-phase two-conduction mode effectively and reasonably verify that the proposed methods can modify deviation angle of Hall sensors, make the phase current stable and run up to normal operation mode through the Matlab simulation platform,which validates the feasibility and effectiveness of the proposed strategies.