摘要
空调压缩机无法安装位置传感器,并存在低频运行转速波动较大的现象。针对此问题,本文提出一种无需位置传感器的压缩机速度波动抑制方法,该方法以扩展反电势模型为基础,运用锁相环的方法观测出压缩机的转子位置与转速;并采用傅里叶变换提取速度波动的傅里叶系数,由此推导出压缩机转子的加速度,并产生能有效抑制速度波动的d轴电流补偿量。通过理论推导以及在空调单转子压缩机控制系统上的实验表明,该方法能有效抑制压缩机低频运行时的转速波动。
Position sensor is difficult to be installed on an air conditioner compressor,which has relatively large speed fluctuation during low speed running.To solve this problem,a speed fluctuation reduction method for compressor,which is not relied on position sensor,is proposed in this paper.In this method,extended back electromotive force model and phase lock loop technique are utilized to realize compressor rotor position and speed estimation.Fourier transformation is applied to acquire the Fourier coefficients of speed fluctuation, which are used to deduce the acceleration of compressor rotor.And then,the d-axis current compensation command,which can effectively reduce speed fluctuation,is produced.The effectiveness is demonstrated by theoretical derivation and experiments on the single rotor compressor control system.It is verified that the proposed method is effective in reducing speed fluctuation of a compressor during low speed operation.
出处
《电器》
2013年第S1期491-496,共6页
China Appliance
关键词
永磁同步电机
压缩机
无位置传感器控制
转矩补偿
Permanent magnet synchronous motor
Compressor
Sensorless control
Torque compensation
