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Control Method Of Piezoelectric Driving Device And Piezoelectric Driving Device

A technology of piezoelectric drive and control method, applied in piezoelectric/electrostrictive/magnetostrictive devices, piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, etc., can solve the problem of driving speed Lowering and other issues

Active Publication Date: 2020-10-02
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the driving speed is controlled by changing the duty ratio (duty) of the driving pulse signal. As the duty ratio approaches 0% from 50%, the driving speed decreases.

Method used

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  • Control Method Of Piezoelectric Driving Device And Piezoelectric Driving Device
  • Control Method Of Piezoelectric Driving Device And Piezoelectric Driving Device
  • Control Method Of Piezoelectric Driving Device And Piezoelectric Driving Device

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Embodiment Construction

[0015] Next, the method of controlling the piezoelectric drive device and the piezoelectric drive device according to the present invention will be described in detail based on preferred embodiments shown in the drawings.

[0016] figure 1 It is a plan view showing the piezoelectric drive device according to the preferred embodiment of the present invention. figure 2 as well as image 3 It is a plan view explaining the driving of the piezoelectric actuator. Figure 4 is a graph showing the drive signal applied to the piezoelectric actuator. Figure 5 It is a block diagram showing the circuit configuration of the control device. Figure 6 as well as Figure 7 It is a diagram for explaining the control method of the controller.

[0017] In addition, in Figure 1 to Figure 3 Among them, for the convenience of description, the three mutually orthogonal axes are X-axis, Y-axis and Z-axis, the direction along the X-axis is referred to as the X-axis direction, and the directio...

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Abstract

The invention discloses a control method of a piezoelectric driving device and a piezoelectric driving device, capable of showing excellent stopping position precision. The control method of a piezoelectric driving device which includes a vibrator including a piezoelectric element and vibrating by application of a drive signal to the piezoelectric element, a driven unit moving by the vibration ofthe vibrator, a drive signal generation unit generating the drive signal based on a pulse signal, the control method including: stopping the application of the drive signal to the piezoelectric element at the time when a driving speed of the driven unit is a reference speed, in a case of stopping driving of the driven unit.

Description

technical field [0001] The invention relates to a control method of a piezoelectric driving device and a piezoelectric driving device. Background technique [0002] For example, Patent Document 1 describes a method of reducing the driving speed of the ultrasonic motor when approaching the stop position and stopping the ultrasonic motor at the stop position as a control method for stopping the ultrasonic motor. In addition, the driving speed is controlled by changing the duty ratio (duty) of the driving pulse signal, and the driving speed decreases as the duty ratio approaches 0% from 50%. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2010-183816. Contents of the invention [0004] Thus, in the ultrasonic motor control method of Patent Document 1, the driving speed is controlled by changing the duty ratio of the driving pulse signal. However, when the duty ratio of the driving pulse signal approaches 0%, the waveform of the driving signal becomes distorted. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/02H02N2/06
CPCH02N2/028H02N2/062H02N2/142H02N2/103H02N2/004H02N2/0075H10N30/802H10N30/2023
Inventor 村上诚
Owner SEIKO EPSON CORP