Title:
【発明の名称】ブラシレスモ―タの駆動装置
Document Type and Number:
Japanese Patent JP2502620
Kind Code:
B2
Abstract:
PCT No. PCT/JP88/00880 Sec. 371 Date Jun. 22, 1989 Sec. 102(e) Date Jun. 22, 1989 PCT Filed Sep. 2, 1988 PCT Pub. No. WO89/02186 PCT Pub. Date Mar. 9, 1989.The present invention relates to a drive device for a brushless motor utilizing no position detector for detecting the position of a movable element of the motor. The drive device comprises a phase controlled loop for controlling an output of a voltage controlled oscillator (40) by supplying an electric power to motor driving coils (1, 2, 3), detecting the difference in phase between the power supply waveforms thereof and a counterrelectromotive force of the motor driving coils during a power supply interrupting period with the use of a phase difference detector (20) and inputting a detected phase difference signal to the voltage controlled oscillator (40), an oscillation frequency initializing means (70) and a driving transistor interrupting circuit (80).
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Inventors:
KIMURA YOSHITSUGU
YASOHARA MASAHIRO
NAKANO HIROMITSU
YASOHARA MASAHIRO
NAKANO HIROMITSU
Application Number:
JP22231887A
Publication Date:
May 29, 1996
Filing Date:
September 04, 1987
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H02P6/06; H02P6/08; H02P6/18; H02P6/182; H02P6/21; (IPC1-7): H02P6/18
Domestic Patent References:
| JP5280414A | ||||
| JP5472413A | ||||
| JP5829380A | ||||
| JP58175984A | ||||
| JP60234494A | ||||
| JP61170291A |
Attorney, Agent or Firm:
Tomoyuki Takimoto