摘要
基于反电势波形观测法,提出了一种检测永磁同步电机转子初始位置的自动标定系统。该标定系统通过差分放大器采集表征永磁同步电机转子位置的反电势信号;利用旋变信号解码电路获取表征旋变转子位置的Z脉冲信号。由单片机计算出电机反电势信号周期及反电势过零点至Z脉冲的时间间隔,即可得出永磁同步电机转子的初始位置。此标定系统无需逆变器和外部高压电源,便可完成转子初始位置的自动测量,试验验证了该测量方法正确、有效,具有较好的动态响应和测量精度。
An automatic calibration system of the initial rotor position for permanent magnet synchronous motor （PMSM） has been proposed based on a back EMF waveform observation method. The back EMF signal which stands for the rotor position of a PMSM was obtained by a difference amplifier. The Z pulse signal which stands for the absolute angular position passes through zero was obtained by a resolver decoding circuit. The period of the back EMF signal and the time interval between the zero-crossing of back EMF and Z pulse were calculated by the microcontroller, then the initial rotor position of PMSM can be obtained from them. The initial rotor position can be measured by the calibration system without the inverter and the external high voltage power supply. The experimental resuhs verified that the measurement method provided a good dynamic response and accuracy.
出处
《电机与控制应用》
北大核心
2012年第8期6-9,24,共5页
Electric machines & control application
基金
国家高技术研究发展计划(863计划)(2010AA1123089001)
长春市科技计划项目(10K221)
关键词
转子初始位置
永磁同步电机
绝对位置传感器
反电势
initial rotor position
permanent magnet synchronous motor （PMSM）
absolute angel sensor
back EMF
