In this paper, the structural design and driving mechanism of a non-contact piezoelectric motor modulated by electromagnetic force are introduced. The equations of the electromagnetic force and torque of the electromagnetic modulation mechanism for the motor are deduced. Based on the piezoelectricconstitutive equation and torque balance equations of the driving system, the equation of the piezoelectric driving torque is also obtained. Using these equations, the influences of the related parameters on the relationship between electromagnetic torque and angle difference between pole and rotor are studied. The influences of the main parameters and signal frequency on piezoelectric driving torques are analyzed. Based on them, the torque optimization of the motor is completed and the load-carrying ability of the motor is increased by about 50 times. A prototype of the motor is developed. Its output torque is tested and compared with calculated one which illustrates the theoretical model here.

中文翻译：

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电磁力调制的非接触式压电电机转矩

本文介绍了一种电磁力调制的非接触式压电电机的结构设计和驱动机理。推导出电机电磁调制机构的电磁力和转矩方程。基于驱动系统的压电本构方程和转矩平衡方程，还得到了压电驱动转矩方程。利用这些方程，研究了相关参数对电磁转矩与极转子角差关系的影响。分析了主要参数和信号频率对压电驱动力矩的影响。在此基础上，完成了电机的转矩优化，电机的承载能力提高了约50倍。开发了电机的原型。对其输出扭矩进行了测试，并与计算出的扭矩进行了比较，其中说明了此处的理论模型。