MULTI-SURFACE-SENSOR CONTROL UNIT FOR A TRAVELLING-WAVE MOTOR.

摘要

PCT No. PCT/EP90/01973 Sec. 371 Date Jul. 15, 1991 Sec. 102(e) Date Jul. 15, 1991 PCT Filed Nov. 19, 1990 PCT Pub. No. WO91/08594 PCT Pub. Date Jun. 13, 1991.In an apparatus for evaluating and controlling the driving state of a traveling wave motor composed of a stator equipped with an elastic vibrating body and an excitation system composed of a plurality of segments and generating ultrasound vibrations as well as a rotor that is in contact under pressure with the stator in a surface region and is equipped with a sensor device that is disposed at the vibrating body or at the excitation system, the signals of the sensor device are fed to the regulating circuit of an evaluation and control unit for controlling the excitation system. The sensor device includes at least two sensor surfaces which are attached to the vibrating body or to the excitation system and the signals corresponding to the sensor surfaces are fed separately to the evaluation and control unit.