JPS54105736A - Power circuit - Google Patents

Power circuit

Info

Publication number
JPS54105736A
JPS54105736A JP1280978A JP1280978A JPS54105736A JP S54105736 A JPS54105736 A JP S54105736A JP 1280978 A JP1280978 A JP 1280978A JP 1280978 A JP1280978 A JP 1280978A JP S54105736 A JPS54105736 A JP S54105736A
Authority
JP
Japan
Prior art keywords
current
output voltage
thyristor
rectifier circuit
flowing
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
JP1280978A
Other languages
Japanese (ja)
Inventor
Koichiro Koizumi
Yoshio Kubota
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.)
Jeol Ltd
Original Assignee
Jeol Ltd
Nihon Denshi KK
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 Jeol Ltd, Nihon Denshi KK filed Critical Jeol Ltd
Priority to JP1280978A priority Critical patent/JPS54105736A/en
Publication of JPS54105736A publication Critical patent/JPS54105736A/en
Pending legal-status Critical Current

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  • Inverter Devices (AREA)

Abstract

PURPOSE: To provide an operation of control in a manner of high response for the current flowing in the thyristor, by detecting the current of high frequency directly flowing in the thyristor element to rapidly decrease an output voltage of the power rectifier circuit if said current reaches the critical level.
CONSTITUTION: A current, flowing in thyristors 5 to 8 in a thyristor inverter 9 likely used for induction heaters, is detected by a detecting coil 12, being fed to a control circuit 14 through an amplifier 13, that provides a characteristic with the output voltage rapidly rising up from zero at around a value corresponding to the rated current value, and compared with a reference signal 16, with its difference signal inputted to a gate signal generator 3, and the output voltage of a power rectifier circuit 2 is controlled. In this way, with the current increasing in the thyristors 5 to 8 due to some reason, an output voltage of the power rectifier circuit 2 is remarkably decreased, further with the current additionally increasing, the power source 4 is made stopping, thus capable of operating a protection for the thyristor elements.
COPYRIGHT: (C)1979,JPO&Japio
JP1280978A 1978-02-07 1978-02-07 Power circuit Pending JPS54105736A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1280978A JPS54105736A (en) 1978-02-07 1978-02-07 Power circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1280978A JPS54105736A (en) 1978-02-07 1978-02-07 Power circuit

Publications (1)

Publication Number Publication Date
JPS54105736A true JPS54105736A (en) 1979-08-20

Family

ID=11815707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1280978A Pending JPS54105736A (en) 1978-02-07 1978-02-07 Power circuit

Country Status (1)

Country Link
JP (1) JPS54105736A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62147964A (en) * 1985-12-20 1987-07-01 Sanyo Electric Co Ltd Control circuit of inverter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62147964A (en) * 1985-12-20 1987-07-01 Sanyo Electric Co Ltd Control circuit of inverter

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