CONTROL METHOD OF ACTUATOR

PROBLEM TO BE SOLVED: To reduce operation sounds of a piezoelectric vibrator actuator. SOLUTION: A piezoelectric vibrator actuator driven through vibration of a piezoelectric element following the variation of an applying voltage is applied with a voltage having a linear displacement waveform or a s...

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Bibliographic Details
Main Authors TSUKUI MICHIO, SUDO KENJI, KAWAKURA HIROKO
Format Patent
LanguageEnglish
Published 31.07.2003
Edition7
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
GENERATION
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Summary:PROBLEM TO BE SOLVED: To reduce operation sounds of a piezoelectric vibrator actuator. SOLUTION: A piezoelectric vibrator actuator driven through vibration of a piezoelectric element following the variation of an applying voltage is applied with a voltage having a linear displacement waveform or a sinusoidal displacement waveform where the rise time T1of the voltage from the minimum level to the maximum level is different from the fall time T2of the voltage from the maximum level to the minimum level. When the ratio between the rise time T1and the fall time T2is set in the range of 0.95:0.05-0.8:0.2, operation sounds can be reduced while attaining a force required for driving the actuator. COPYRIGHT: (C)2003,JPO
Bibliography:Application Number: JP20020008279