Title:
DRIVING METHOD FOR PIEZOELECTRIC CERAMIC ACTUATOR
Document Type and Number:
Japanese Patent JP3318689
Kind Code:
B2
Abstract:
PURPOSE: To realize D.C. driving while suppressing hysteresis in the displacement-voltage characteristics by driving a piezoelectric ceramic actuator with a nonlinear output voltage.
CONSTITUTION: An input voltage is subjected to nonlinear amplification such that the microdisplacement of a piezoelectric actuator exhibits nonlinearity with respect to the input voltage and a nonlinear output voltage is applied to a piezoelectric ceramic. When an input voltage is applied (S1), a nonlinear amplifier built in a power supply circuit or the like amplifies the input voltage nonlinearly (S2) to produce a nonlinear output voltage (S3). The piezoelectric actuator is subsequently driven with the nonlinear output voltage. This method allows driving of the piezoelectric actuator while suppressing the hysteresis.
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Inventors:
Yoshiaki Fuda
Seiji Chonan
Jiang Zhongwei
Seiji Chonan
Jiang Zhongwei
Application Number:
JP28301493A
Publication Date:
August 26, 2002
Filing Date:
November 12, 1993
Export Citation:
Assignee:
NEC Tokin Co., Ltd.
Seiji Chonan
Seiji Chonan
International Classes:
G05B11/36; G05D3/00; H01L41/09; H02N2/00; (IPC1-7): H01L41/09; G05B11/36; G05D3/00; H02N2/00
Domestic Patent References:
| JP3256375A | ||||
| JP61256774A | ||||
| JP6104501A |
Attorney, Agent or Firm:
Yosuke Goto (3 outside)
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