Title:
ELECTRICAL DEVICE
Document Type and Number:
Japanese Patent JP2008236900
Kind Code:
A
Abstract:
To securely interrupt a control circuit power supply, even if the control circuit power supply becomes unstable at power off operation in the control of load by a control circuit that includes a microcomputer.
When an on/off switch 28 is turned off, the microcomputer 17 turns off an internal switch 32, a transistor 23 is turned off and power supply to the control circuit 16 is stopped. Since the on/off switch 28 is off-operated, the transistor 23 becomes a non-conduction state as it is. Even if the microcomputer 17 malfunctions since power voltage becomes unstable, and the internal switch 32 is turned on, a thyristor 18 is prevented from being turned on. The transistor 23 is thereby prevented from being turned on again.
More Like This:
| JPH11299289 | POWER SUPPLY EQUIPMENT |
Inventors:
NODA TAKAMITSU
Application Number:
JP2007072540A
Publication Date:
October 02, 2008
Filing Date:
March 20, 2007
Export Citation:
Assignee:
TOSHIBA CORP
TOSHIBA CONSUMER ELECT HOLDING
TOSHIBA HOME APPLIANCES CORP
TOSHIBA CONSUMER ELECT HOLDING
TOSHIBA HOME APPLIANCES CORP
International Classes:
H02J1/00; H03K17/72; G06F1/26
Domestic Patent References:
| JPH08111932A | 1996-04-30 | |||
| JP2001224500A | 2001-08-21 | |||
| JPH022719U | 1990-01-10 | |||
| JP2006149161A | 2006-06-08 | |||
| JPH08322145A | 1996-12-03 | |||
| JPH10322898A | 1998-12-04 | |||
| JP2000166088A | 2000-06-16 | |||
| JPH08205400A | 1996-08-09 | |||
| JPS5349923A | 1978-05-06 | |||
| JP2000207037A | 2000-07-28 | |||
| JPH1155853A | 1999-02-26 |
Attorney, Agent or Firm:
Tsuyoshi Sato