SIMPLIFIED EQUIVALENT-CIRCUIT OF AN ULTRASONIC MOTOR AND ITS APPLICATIONS

The present paper deals with a simplified equivalent circuit of an ult rasonic motor and its application to the estimation of motor character istics for the systematization of research on ultrasonic motors. The e quivalent circuit must be simple in order to show the principle of mot or operation, so we propose simplified equivalent circuits of one type of ultrasonic motor [1]. As a result, it is made clear that the equiv alent circuit proposed is very useful for considering motor characteri stics. Moreover, in this paper the improved equivalent circuit of an u ltrasonic motor for generating a large torque with a relatively high e fficiency is also proposed.