JPS57208872A - Protective device for high-frequency inverter - Google Patents

Protective device for high-frequency inverter

Info

Publication number
JPS57208872A
JPS57208872A JP56091546A JP9154681A JPS57208872A JP S57208872 A JPS57208872 A JP S57208872A JP 56091546 A JP56091546 A JP 56091546A JP 9154681 A JP9154681 A JP 9154681A JP S57208872 A JPS57208872 A JP S57208872A
Authority
JP
Japan
Prior art keywords
zero
heating coil
transistor
output
zero volt
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
JP56091546A
Other languages
Japanese (ja)
Inventor
Kazuhisa Ishibashi
Sadaki Matsui
Tadahiko Kuzura
Kazusane Hirota
Masaki Morotomi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP56091546A priority Critical patent/JPS57208872A/en
Publication of JPS57208872A publication Critical patent/JPS57208872A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

PURPOSE:To protect the semiconductor element of a high-frequency output circuit positively from eddy currents by giving a rectifying wave-form through which a DC power supply connected to the output circuit starts from zero volt. CONSTITUTION:When a heating coil 1 is short-circuited, the heating coil 1, currents flowing through a transistor 14 for output, also start from zero and increase in response to the starting from zero volt and rise of voltage inputted to the heating coil because the voltage starts from zero volt and rises when a zero cross switch 13 is turned ON. When the currents reach predetermined value, the breakdown of the transistor 14 for output is prevented because a comparison circuit 21 is operated and a switching transistor 16 is interrupted.
JP56091546A 1981-06-16 1981-06-16 Protective device for high-frequency inverter Pending JPS57208872A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56091546A JPS57208872A (en) 1981-06-16 1981-06-16 Protective device for high-frequency inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56091546A JPS57208872A (en) 1981-06-16 1981-06-16 Protective device for high-frequency inverter

Publications (1)

Publication Number Publication Date
JPS57208872A true JPS57208872A (en) 1982-12-22

Family

ID=14029477

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56091546A Pending JPS57208872A (en) 1981-06-16 1981-06-16 Protective device for high-frequency inverter

Country Status (1)

Country Link
JP (1) JPS57208872A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61177176A (en) * 1985-01-31 1986-08-08 Yokogawa Electric Corp Separately excited inverter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61177176A (en) * 1985-01-31 1986-08-08 Yokogawa Electric Corp Separately excited inverter
JPH0470873B2 (en) * 1985-01-31 1992-11-12 Yokogawa Electric Corp

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