超声电机启动瞬态的电参量测试
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TM359.9;TH132.2

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基础加强计划技术领域基金资助项目(2019-JCJQ-JJ-337);机械结构力学及控制国家重点实验室开放课题资助项目(MCMS-I-0519G02);江苏高校优势学科建设工程资助项目


Test Experiments of Transient Electric Parameters of Ultrasonic Motor in Starting up State
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    摘要:

    针对当前超声电机电参量的测试方法无法表征其启动瞬态电参量变化规律的问题,提出一种用于超声电机启动瞬态电参量测试的方法。基于加窗的短时傅里叶变换,对超声电机的驱动电压和驱动电流信号进行时频分析处理,得到超声电机启动瞬态下电流电压信号对应的频谱。利用单峰谱线插值法对信号的频谱进行插值修正,得到信号精确的幅值、频率和相位信息,并进一步计算得到阻抗、阻抗角等电参量信息。通过对仿真信号进行处理分析,验证该方法在启动瞬时电参量计算方面的准确性。搭建超声电机瞬态测试平台并对PMR-60/E型超声电机进行测试。结果表明,该方法能够揭示超声电机启动瞬态电参量在电机启动过程中的变化规律,可用于评估超声电机的振动响应特性,同时为超声电机等效电路模型的建立及驱动电路的设计提供重要信息。

    Abstract:

    In the view that the current testing method for the electric parameters of ultrasonic motor cannot characterize the variation of its transient electric parameters in starting up state, a method for testing the electrical parameters of ultrasonic motors in starting transient state is proposed. In this paper, the drive voltage and current signals of the ultrasonic motor are analyzed by windowed short-time Fourier transform, then the frequency spectrum of the voltage and current signals is obtained. Based on single peak spectral lines interpolation algorithm, the accurate amplitude, frequency and phase of the signals could be obtained from the frequency spectrum. By processing and analyzing the simulation signal, the accuracy of the method in the instantaneous electric parameter calculation is verified. A PMR-60/E ultrasonic motor is tested using the ultrasonic motor transient testing platform. The results show that this method can reveal the variation of the transient electrical parameters of ultrasonic motor in the process of motor starting, and can be used to evaluate the vibration response characteristics of ultrasonic motor. It can provide important information for the establishment of the equivalent circuit model of ultrasonic motor and the design of the driving circuit at the same time.

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  • 在线发布日期: 2022-11-01
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