介绍了自校正超声电机的转动机理,用有限元法分析了该电机定子的振动模态,得到了适合电机运转的工作模态?? B12模态,并且设计和制造了驻波型自校正超声电机.该电机定子直径为?40 M M ,高为 1.5 M M ,电机工作频率为 30 K HZ~33 K HZ,能够实现正、反转并具有自校正的能力,设计计算与所做的实验结果基本吻合.“,”We studied the self correction ultrasonic motors of standing waves and used a new type rotor and a novel drive method.In the first part of the paper,the operational principle and motor construction are presented briefly.We analysed vibration modes of this motor using finite element mthod and gained a mode mode B 12 which enable the motor to run.Finally designed and made a prototype of self correction ultrasonic motor using the standing wave.The stator of the motor dimension is as follows:diameter is 40 mm,thickness 1.5 mm.The experimental results show that the rotational directions can be changed,and the rotor can be corrected at each step.