JPS5467874A - Temperature control circuit - Google Patents

Temperature control circuit

Info

Publication number
JPS5467874A
JPS5467874A JP13591377A JP13591377A JPS5467874A JP S5467874 A JPS5467874 A JP S5467874A JP 13591377 A JP13591377 A JP 13591377A JP 13591377 A JP13591377 A JP 13591377A JP S5467874 A JPS5467874 A JP S5467874A
Authority
JP
Japan
Prior art keywords
heater
thyristor
transistor
case
ripple voltage
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
JP13591377A
Other languages
Japanese (ja)
Inventor
Shinichi Ito
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP13591377A priority Critical patent/JPS5467874A/en
Publication of JPS5467874A publication Critical patent/JPS5467874A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Resistance Heating (AREA)
  • Control Of Temperature (AREA)

Abstract

PURPOSE: To lessen overrun in the case of the temp rise of a heater, by generating gate pulse when ripple voltage in case of ON-OFF becomes zero, in a device that forms gate pulse to a semiconductor element for controlling the current of the heater by the ON-OFF signal of a switching circuit.
CONSTITUTION: A two-way 3 terminal thysistor 2 is connected to a heater 1, a transistor 5 is in ON-OFF by the signals of a temp detecting circuit 3 and transmits signals to a drive circuit 4, and the gate pulse VG of the thyristor 2 is generated from the drive circuit. Since ripple voltage appears in a collector of the transistor when the transistor 5 is in ON-OFF, and pulse for driving the thyristor is generated when the ripple voltage becomes zero, the conduction of the thyristor 2 is changed into the semi-cycle of a power source and current flowing through the heater 1 is also converted into the semi-cycle of the power source, thus lessening overrun in the case of the temp rise of the heater.
COPYRIGHT: (C)1979,JPO&Japio
JP13591377A 1977-11-11 1977-11-11 Temperature control circuit Pending JPS5467874A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13591377A JPS5467874A (en) 1977-11-11 1977-11-11 Temperature control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13591377A JPS5467874A (en) 1977-11-11 1977-11-11 Temperature control circuit

Publications (1)

Publication Number Publication Date
JPS5467874A true JPS5467874A (en) 1979-05-31

Family

ID=15162758

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13591377A Pending JPS5467874A (en) 1977-11-11 1977-11-11 Temperature control circuit

Country Status (1)

Country Link
JP (1) JPS5467874A (en)

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