WHOLE ROTATION REGION SPEED CONTROL SYSTEM IN ROTARY TRAVELING-WAVE TYPE VIBRATION WAVE MOTOR

摘要

To establish a new design concept of performing speed control in a lump on the whole rotation region including a zero-cross region and provide a practical control system on the basis of the design concept.SOLUTION: The present invention is composed of two approaches of establishing a technical concept for performing control in a lump on the whole rotation region and developing an implementation method therefor. The former is a design concept of performing speed control on an existing motor using composite signal control. Specifically, the whole rotation region is controlled in a lump by following the conventional system in a CW/CCW region and by superposing a voice modulation PWM signal on a constant speed continuous driving signal near a boundary in a zero-cross region. The latter is a design concept of changing a structure of a motor itself and using a driving system successfully used in a motor of another form. Specifically, the whole rotation region is controlled integrally by a rotary traveling-wave type vibration wave motor having a non-organic system driving contact surface, utilization of coolant liquid, and AM single modulation system.SELECTED DRAWING: Figure 2