Title:
POWER SUPPLY DEVICE AND MOTOR CONTROL DEVICE USING THE SAME
Document Type and Number:
Japanese Patent JP3806678
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a power supply device that detects the abnormality of an AC power supply and stops a short-circuit operation.
SOLUTION: An input cycle of a zero cross signal from a zero cross detection circuit that detects the zero cross point of the AC power supply is measured, the circuit operation of a short-circuit circuit is stopped when the input cycle reaches a prescribed value or is out of a prescribed range, and also the short-circuit operation of the short-circuit circuit is stopped when the input cycle of the input signal of the zero cross signal is changed, or when the input signal of the zero cross signal is not inputted for a prescribed time. Furthermore, the short-circuit operation of the circuit for short-circuiting is stopped when the zero cross signal is not inputted during a range from the input time of the zero cross signal to a second prescribed time after a first prescribed time.
Inventors:
Yasuo Notohara
Suzuki Takahiro
Endo Tsunehiro
Junichi Takagi
Suzuki Takahiro
Endo Tsunehiro
Junichi Takagi
Application Number:
JP2002220591A
Publication Date:
August 09, 2006
Filing Date:
July 30, 2002
Export Citation:
Assignee:
株式会社日立製作所
日立ホーム・アンド・ライフ・ソリューション株式会社
日立ホーム・アンド・ライフ・ソリューション株式会社
International Classes:
H02H7/00; H02M7/12; H02H7/125; H02M7/48; H02P3/18; (IPC1-7): H02M7/12; H02H7/00; H02H7/125; H02M7/48
Domestic Patent References:
| JP11069861A | ||||
| JP6205586A | ||||
| JP6153511A | ||||
| JP4165954A | ||||
| JP77946A | ||||
| JP2000295839A | ||||
| JP2000193286A | ||||
| JP2000253686A | ||||
| JP11113251A |
Attorney, Agent or Firm:
Yasuo Sakuta
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