无位置传感器的无刷直流电动机闭环起动方法
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摘要
利用无刷直流电机定子通电两相在悬空相的感应电压与相反电动势电压两者过零点相同,在启动阶段启动电流变化快,电机转速低,悬空相的感应电压远远大于相反电动势的特点,建立了利用检测悬空相感应电压过零点替代检测相反电动势过零点的电机起动过程中的转子位置检测方法,该方法实现了启动阶段实时检测转子位置信息,解决了传统方法中起动过程易失步的问题,弥补了传统方法的不足。
A new method of testing the zero-crossing points of back-EMF of BLDCM was proposed with the principle of the induced voltage at the vacant phase caused by that the two phases of the energized stators and the back-EMF had the same zero-crossing points and the amplitude of the former one was bigger than the latter for the changing rate of the starting current was much faster and the speed of motor was lowest in the start-up level. This testing method was established by testing the zero-crossing points of the induced voltage at the vacant phase instead of the zero-crossing points the back-EMF. The new method could achieve the start-up of the motor with real-time detecting the position of the rotor,solvde the problem of losing the start-step of the motor,and compensated the shortages of the traditional starting method.
A new method of testing the zero-crossing points of back-EMF of BLDCM was proposed with the principle of the induced voltage at the vacant phase caused by that the two phases of the energized stators and the back-EMF had the same zero-crossing points and the amplitude of the former one was bigger than the latter for the changing rate of the starting current was much faster and the speed of motor was lowest in the start-up level. This testing method was established by testing the zero-crossing points of the induced voltage at the vacant phase instead of the zero-crossing points the back-EMF. The new method could achieve the start-up of the motor with real-time detecting the position of the rotor,solvde the problem of losing the start-step of the motor,and compensated the shortages of the traditional starting method.
引文
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[2]年珩,贺益康,黄雷.永磁同步电机无位置传感器运行场路耦合分析[J].中国电机工程学报,2008,28(18):104-109.
[3]顾绳谷.电机与拖动基础[M].北京:机械工业出版社2007.
[4]STEPHEN D.UMANS,Electirc Machinery[M].Seventh Edition.Beijing:Publishing House of Electronics Industry,2014.
[5]黄守道,邓建国,罗德荣.电机瞬态过程分析的MATLAB建模与仿真[M].北京:电子工业出版社,2013:215-217.
[6]钟继隆,周苏,王明强.考虑磁路饱和效应的无刷直流电机电感参数研究[J].佳木斯大学学报,2014.3,32(2):176-186.
[7]汤蕴璆,史乃.电机学[M].2版.北京:机械工业出版社,2007.
[8]任雷,崔芮华,王宗培.永磁同步电机绕组电感的饱和效应[D].电工技术学报,2000,15(1):21-25.
[9]胡庆波,郑继文,吕征宇.混合动力中无刷直流电机反接制动PWM调制方法的研究[J].中国电机工程学报,2007,27(30):87-91.
[10]宋飞,周波,吴小婧.校正无位置传感器无刷直流电机位置信号相位的闭环控制策略[J].中国电机工程学报,2009,29(12):52-57.
[11]邱关源.电路[M].5版.北京:高等教育出版社,2005.
[12]李家庆,李芳,叶文.无刷直流电机控制应用--基于STM8S系列单片机[M].北京:北京航空航天大学出版社,2014:1-11,367-368.
[13]LAI Y S,LIN Y K.Assessment pulse-width modulation techniques for brushless dc motor drives[J].IEEE Industry Applications Magazine,2008,14(5):34-44.
[14]WOOK-JIN L,SEUNG-KI S.A new starting method of BLDC motors without position sensor[J].IEEE Transactions on Industry Applications,2004(4):2397-2402.