振荡式直线压缩机行程自传感算法研究

Research on Stroke Self-sensing Algorithm of Linear Oscillatory Compressor

通过理论分析和实验研究,分析了电机参数对无位置传感器计算结果的影响。实验结果表明:电阻对计算结果影响较小,基本可以忽略;电感对位移的相位影响较大,为保证谐振频率跟踪的准确性,需要对电感进行修正;反电势系数对位移的幅值有很大影响,需要进行修正和补偿。经过参数补偿后,位移自传感的计算精度可以达到3%以内,证实算法可行。

The effect of linear motor parameters on senseless displacement calculation was carried out by means of experiment and study.The results show that the impact caused by resistance is so little that can be ignored.The inductance produces an effect on the phase of senseless displacement.For the exactness of resonance frequency following,it’s necessary to correct the inductance.The back electromotive force（BEMF） coeffi cient produces an effect on the amplitude of displacement.It’s also necessary to correct the BEMF coeffi cient.After these correction,the error of self-sensored displacement can be less than 3%,the feasibility of algorithm is testifi ed.