随机频率三角波注入永磁同步电机无位置传感器降噪控制  

Random-Frequency Triangular Wave Injection Based Sensorless Control of PMSM Drives for Audible Noise Reduction

作　　者：孙明阳 和阳 邱先群 陶涛 赵文祥[1] Sun Mingyang;He Yang;Qiu Xianqun;Tao Tao;Zhao Wenxiang(School of Electrical and Information Engineering Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学电气信息工程学院,镇江212013

出　　处：《电工技术学报》2023年第6期1460-1471,共12页Transactions of China Electrotechnical Society

基　　金：国家杰出青年科学基金(52025073);镇江市重点研发计划(GY2020011);江苏省研究生科研与实践创新计划(KYCX20_2855)资助项目。

摘　　要：对于永磁同步电机(PMSM)而言,高频信号注入法是一种有效的零低速无位置传感器控制方法。然而,注入的高频信号会带来严重的可听噪声问题,无法满足舰船推进等高端领域的应用要求。为此,该文提出随机频率三角波电压注入无位置传感器控制方法,解决了PMSM的噪声问题。以两个不同频率的三角波电压信号为基础,遵循伏秒面积相等原则,通过线性同余法生成随机数进行选择,合成随机频率的三角波电压信号。同时,将该随机频率信号注入到估计的转子参考系中,可以有效降低注入频率处的最大噪声,并拓展高频电流的功率谱密度(PSD),从而降低高频电流引起的可听噪声。此外,为了从感应电流中获取转子位置信息,提出了一种对应的信号解调方法。实验验证了该方法的可行性和有效性。High-frequency signal injection is an effective sensorless control method for the permanent magnet synchronous motor(PMSM)at low and zero speeds.However,the injected high-frequency signal will produce severe audible noise.The application of this method in high-end fields such as ship propulsion is limited.Recently,lots of methods were proposed to reduce noise.Random injection methods can effectively reduce noise without other equipment.However,the random objects of these methods are sinusoidal waves or square waves,and their maximum noise at the injection frequency is relatively large.This paper presents the random-frequency triangular wave voltage injection-based sensorless control method to solve this problem.Firstly,two triangular wave voltage signals with different frequencies are chosen based on the principle of equal volt second area.The random number is generated by the linear congruence method to synthesize triangular wave voltage signals with random frequencies.Secondly,by injecting the signal into the estimated rotor reference system,the maximum noise at injection frequency can be effectively reduced.Meanwhile,the distribution of high-frequency current power spectral density(PSD)is extended.Thus,the audible noise produced by the high-frequency current can be reduced.In addition,a corresponding signal demodulation method is proposed to obtain the rotor position from the induced current.The information of rotor position and speed can be achieved without the demodulation signal.Finally,the sensorless control can be realized with the estimated rotor position and speed.The feasibility and effectiveness of the proposed method are verified by experimental results.The FFT analysis is used to analyze current.The harmonic components of 312.5 Hz,625 Hz,and random-frequency trianglar wave at the injection frequency are 1.05 A,1.33 A,and 0.43 A,respectively.Compared with fixedfrequency triangular wave injection,random triangular wave injection disperses the spectrum and reduces the peak value of the spectrum.Random

关 键 词：永磁同步电机 随机频率 三角波 噪声 功率谱密度 

分 类 号：TM315[电气工程—电机]