JPH037015A - Power ic - Google Patents

Power ic

Info

Publication number
JPH037015A
JPH037015A JP14071089A JP14071089A JPH037015A JP H037015 A JPH037015 A JP H037015A JP 14071089 A JP14071089 A JP 14071089A JP 14071089 A JP14071089 A JP 14071089A JP H037015 A JPH037015 A JP H037015A
Authority
JP
Japan
Prior art keywords
circuit
control signal
photocoupler
sent
lower arms
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
JP14071089A
Other languages
Japanese (ja)
Inventor
Yasuji Seki
Toshio Shigekane
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP14071089A priority Critical patent/JPH037015A/en
Publication of JPH037015A publication Critical patent/JPH037015A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To turn off and protect from overcurrent all the semiconductor devices in upper and lower arms by inputting an overcurrent detection signal into a control signal interruption circuit through a photocoupler.
CONSTITUTION: Usually, a control signal outputted from a control circuit is insulated by a photocoupler 6a through a signal interruption circuit 8, sent to drive circuits 4a to 4d for upper and lower arms and performs switching of transistors 2a to 2f. When the main circuit of a power IC 10 gets in an overcurrent state, an overcurrent detection circuit 7 delivers output. This output is insulated by a photocoupler 6b and sent to the control signal interruption circuit 8, where the control signal from a control circuit 5 is interrupted. Consequently, no control signal will be sent after the photocoupler 6a. On that account, the transistors 2a to 2f for the upper and lower arms are all turned off.
COPYRIGHT: (C)1991,JPO&Japio
JP14071089A 1989-06-02 1989-06-02 Power ic Pending JPH037015A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14071089A JPH037015A (en) 1989-06-02 1989-06-02 Power ic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14071089A JPH037015A (en) 1989-06-02 1989-06-02 Power ic

Publications (1)

Publication Number Publication Date
JPH037015A true JPH037015A (en) 1991-01-14

Family

ID=15274920

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14071089A Pending JPH037015A (en) 1989-06-02 1989-06-02 Power ic

Country Status (1)

Country Link
JP (1) JPH037015A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60245493A (en) * 1984-05-17 1985-12-05 Mitsubishi Electric Corp Protecting device of inverter for air conditioner
JPS6122762A (en) * 1984-07-06 1986-01-31 Matsushita Electric Ind Co Ltd Overcurrent protecting circuit
JPS6139820A (en) * 1984-07-30 1986-02-26 Matsushita Electric Ind Co Ltd Overcurrent protecting circuit
JPS61266021A (en) * 1985-05-20 1986-11-25 Mitsubishi Electric Corp Protector for frequency convertor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60245493A (en) * 1984-05-17 1985-12-05 Mitsubishi Electric Corp Protecting device of inverter for air conditioner
JPS6122762A (en) * 1984-07-06 1986-01-31 Matsushita Electric Ind Co Ltd Overcurrent protecting circuit
JPS6139820A (en) * 1984-07-30 1986-02-26 Matsushita Electric Ind Co Ltd Overcurrent protecting circuit
JPS61266021A (en) * 1985-05-20 1986-11-25 Mitsubishi Electric Corp Protector for frequency convertor

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