| 摘要 |
PROBLEM TO BE SOLVED: To provide a drive unit for vibration actuator, capable of appropriately controlling a drive frequency of an oscillator during operation of a vibration actuator.SOLUTION: An ultrasonic motor 10 includes an oscillator 11 and a rotor 12 as a vibration actuator. An ECU 30 functions as hunching detection means that detects a hunching state. The ECU 30 shifts a drive frequency of an AC voltage to high-frequency side when a hunching state is detected. |
