DEVICE FOR DRIVING AND CONTROLLING MOTOR

Japanese Patent JP3540311

B2

PROBLEM TO BE SOLVED: To control a driving frequency of the linear vibration motor 100 so that it may always come to be a resonance frequency without using any sensors for detecting displacement, speed, acceleration, or the like of the moving member, in a device for driving and controlling motor 101 for driving and controlling a linear vibration motor 100 with a spring-supported moving member through the use of AC current.
SOLUTION: The device for driving and controlling motor 101 includes a waveform creating portion 8 for creating a comparative current waveform serving as the reference of a driving current Cd of the linear vibration motor based on an operating condition, a current detecting portion 3 for detecting the driving current, and a controlling portion 9 for controlling a driving voltage Vd for the linear vibration motor in such a manner that the difference between the waveform of comparative current and a waveform of detected output the current detection portion 3 may be zero. The frequency of the driving current Cd is adjusted in such a manner that it may approach to the resonance frequency of the linear vibration motor based on the waveform of comparative current.

Mitsuo Ueda
Hideki Nakata
Yoshi Makoto Ta

JP2003153293A

July 07, 2004

May 29, 2003

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Matsushita Electric Industrial Co., Ltd

F25B1/02; H02P7/00; H02P25/02; H02P25/06; H04M1/02; (IPC1-7): H02P7/00; F25B1/02

JP2001193993A
JP2052692A
JP10243622A
JP200213484A

US20010005320

Kenichi Hayase

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