JPS57199025A - Voltage control circuit - Google Patents

Voltage control circuit

Info

Publication number
JPS57199025A
JPS57199025A JP8398581A JP8398581A JPS57199025A JP S57199025 A JPS57199025 A JP S57199025A JP 8398581 A JP8398581 A JP 8398581A JP 8398581 A JP8398581 A JP 8398581A JP S57199025 A JPS57199025 A JP S57199025A
Authority
JP
Japan
Prior art keywords
switch
voltage
allowable level
control circuit
upper limit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP8398581A
Other languages
Japanese (ja)
Inventor
Takashi Nakamura
Koichi Takeda
Tomoo Matsumoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP8398581A priority Critical patent/JPS57199025A/en
Publication of JPS57199025A publication Critical patent/JPS57199025A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/006—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too high or too low voltage

Abstract

PURPOSE:To prevent the malfuction of a voltage control circuit, by turning off an magnetic reply switch with a rise of the circuit current in either case when the power supply voltage has a fluctuation larger than the upper limit of the allowable level or when the ambient temperature has a fluctuation larger than the allowable level. CONSTITUTION:A diode 1 and a reset coil 12 are connected in series to each other, and one side of this series connection is connected in series to a thermistor 6. Then a holding type switch 5, i.e., a magnetic replay element is set within a magnetic fields of a reset coil 4 and the coil 12. One side of the switch 5 is connected to the power supply voltage VX, and the other side is used as an output VX'. When the voltage VX exceeds the upper limit of the allowable level, the current flowing to a voltage control circuit rises suddenly by the I-V characteristics of the diode 1. Thus the driving energization of the switch 5 goes up to an open region, and then the switch 5 is turned off to deliver no voltage VX. The switch 5 is also turned off when the ambient temperature exceeds the upper limit of the allowable level.
JP8398581A 1981-06-01 1981-06-01 Voltage control circuit Pending JPS57199025A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8398581A JPS57199025A (en) 1981-06-01 1981-06-01 Voltage control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8398581A JPS57199025A (en) 1981-06-01 1981-06-01 Voltage control circuit

Publications (1)

Publication Number Publication Date
JPS57199025A true JPS57199025A (en) 1982-12-06

Family

ID=13817821

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8398581A Pending JPS57199025A (en) 1981-06-01 1981-06-01 Voltage control circuit

Country Status (1)

Country Link
JP (1) JPS57199025A (en)

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