发明申请
US20070108869A1 Driving and control apparatus of piezoelectric ultrasonic motor
审中-公开
压电超声波电机的驱动和控制装置
- 专利标题: Driving and control apparatus of piezoelectric ultrasonic motor
- 专利标题(中): 压电超声波电机的驱动和控制装置
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申请号: US11593595申请日: 2006-11-07
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公开(公告)号: US20070108869A1公开(公告)日: 2007-05-17
- 发明人: Burhanettin Koc , Jung Ryu
- 申请人: Burhanettin Koc , Jung Ryu
- 申请人地址: KR Suwon
- 专利权人: SAMSUNG ELECTRO-MECHANICS CO., LTD.
- 当前专利权人: SAMSUNG ELECTRO-MECHANICS CO., LTD.
- 当前专利权人地址: KR Suwon
- 优先权: KR10-2005-0106147 20051107
- 主分类号: H01L41/107
- IPC分类号: H01L41/107
摘要:
In a driving and control apparatus of a piezoelectric ultrasonic motor, a controller controls a selection of a first channel or a second channel of the piezoelectric ultrasonic motor as a driving channel. A switch part selects one of the first and second channels as the driving channel and the other as a detection channel, and supplies the driving voltage to the piezoelectric ultrasonic motor through the selected driving channel. A phase detector detects a voltage outputted from the piezoelectric ultrasonic motor through the detection channel, calculates a phase deviation, and outputs a phase difference voltage corresponding to the phase deviation. A voltage controlled oscillator generates the oscillation voltage and controls a phase of the oscillation voltage according to the phase difference voltage. A frequency divider divides the oscillation voltage by two to generate the driving voltage, and supplies the divided oscillation voltage to the piezoelectric ultrasonic motor through the driving channel.