【摘要】 论述了一种基于导纳圆的定子电参数的测量方法及如何确定超声马达的最高效率点。通过对马达定子的频率特性和效率的仿真分析 ,得到如下结论 :a.证明上述测量定子电参数的方法是可行的 ;b.马达运行的最高效率点为频率特性的最小相位点 ;c.电路与马达的匹配原则是匹配后的最小相位为零。更多还原

【Abstract】 The measurement of the parameters of ultrasonic motor stator′s equiverent electric model and the determination of the best efficiency point of the motor are two important problems in the study of the motor.In this paper,a method for measuring the stattor elecitric model parameters based on its admittance circle and the determination of the best efficiency point of the motor are proposed.The following conclusions are obtained by simulating the staor′s frequency characteristics and its efficency based on above parametes:(a) The proposed measurement method is effective.(b) The best efficiency point of the stator is the minimum phase point between its resonance and anti resonance frequencies.(c) The principle of matching the motor with its driving circuit is to get their minimum phase to be zero.更多还原