An ultrasonic motor is a kind of motor with a completely new driving principle to obtain turning force . the motor converts a piezoelectrically excited resonant vibration of the stator into a rotational movement of the rotor by frictional forces 压电超声波电机是一种全新原理获得驱动力的电机，它利用压电陶瓷的压电效应使定子产生超声波振动，通过定子和转子间的摩擦力来驱动转子。
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An ultrasonic motor is a kind of driving machine which obtains dynamic in virtue of use friction to transfer elastic ultrasonic vibration . it is a kind of motor with a completely new driving principle to obtain turning force . the motor converts a piezoelectrically excited resonant vibration of the stator into a rotational movement of the rotor by frictional forces 超声波马达是一种借助摩擦传递弹性超声波振动以获得动力的驱动机构，是一种全新原理获得驱动力的新型马达，它利用压电陶瓷的压电效应使定子产生超声波振动，通过定子和转子间的摩擦力来驱动转子。
