Ultrasonic motor drive system

Abstract

PURPOSE: To increase a drive efficiency of an ultrasonic motor by controlling an drive frequency setting device to output a drive frequency for the muximum drive efficiency of the ultrasonic motor or by controlling a drive voltage setting device to output a drive voltage for the muximum drive efficiency of the ultrasonic motor. CONSTITUTION: An output frequency of a drive frequency setting device 2 corresponds to a drive frequency of an ultrasonic motor and is controlled by an output from a drive condition detector 1. A drive voltage setting device 4 supplies an output from a phase shifting device 3 to the ultrasonic motor after amplifying it to the drive voltage needed for driving the ultrasonic motor. The drive voltage setting device 4 also varies the drive voltage and changes the drive speed of the ultrasonic motor. A drive condition detector 1 watches if the ultrasonic motor is driven in an antiresonance condition and controls the drive frequency setting device 2 by its output so that the ultrasonic motor may be kept driven in an antiresonance condition. COPYRIGHT: (C)1991,JPO&Japio

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Cited By (7)

    Publication numberPublication dateAssigneeTitle
    JP-2007006616-AJanuary 11, 2007Seiko Epson Corp, セイコーエプソン株式会社圧電アクチュエータの駆動制御装置、電子機器および圧電アクチュエータの駆動制御方法
    JP-2010104131-AMay 06, 2010Alps Electric Co Ltd, Sanyo Electric Co Ltd, Sanyo Semiconductor Co Ltd, アルプス電気株式会社, 三洋半導体株式会社, 三洋電機株式会社高電圧出力ドライバー
    JP-2014124011-AJuly 03, 2014Toyota Industries Corp, 株式会社豊田自動織機振動子および移動子を備える振動アクチュエータの駆動装置
    US-5461273-AOctober 24, 1995Matsushita Electric Industrial Co., Ltd.Method and an apparatus for controlling a moving velocity of an ultrasonic motor
    US-5644199-AJuly 01, 1997Matsushita Electric Industrial Co., Ltd.Method for driving an ultrasonic motor
    US-5889350-AMarch 30, 1999Canon Kabushiki KaishaVibration type driving apparatus
    US-7737604-B2June 15, 2010Panasonic CorporationUltrasonic actuator