JPS5490527A - Protection system for transistor inverter circuit - Google Patents

Protection system for transistor inverter circuit

Info

Publication number
JPS5490527A
JPS5490527A JP15729377A JP15729377A JPS5490527A JP S5490527 A JPS5490527 A JP S5490527A JP 15729377 A JP15729377 A JP 15729377A JP 15729377 A JP15729377 A JP 15729377A JP S5490527 A JPS5490527 A JP S5490527A
Authority
JP
Japan
Prior art keywords
output
coming
transistor
short
inverter
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
JP15729377A
Other languages
Japanese (ja)
Inventor
Ikuo Yasuoka
Tarou Nanyou
Takamasa Kanzaki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP15729377A priority Critical patent/JPS5490527A/en
Publication of JPS5490527A publication Critical patent/JPS5490527A/en
Pending legal-status Critical Current

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  • Inverter Devices (AREA)

Abstract

PURPOSE: To orrectly operate a protection of the transistor element, by means of stopping a base signal to each transistor, with a short-circuit current detected at a low level against the short-circuit fault between both poles of DC terminals through two transistors.
CONSTITUTION: With a transistor Tr2 being short-circuited due to a certain reason, if given an ON-command through Tr1, Tr1B, terminal voltage VR1 of a resistor R1 is inputted to a photocoupler TLP1, with an output D1 of an inverter INV1 coming to be "1" similarly with an output D2 also coming to be "1". Accordingly, an output of NAND element comes to be "0", with an output D3 of an inverter INV3 coming to be "1". And an output IBS, by elements AND1 to AND4, makes the signal of bases Tr1B to Tr1 to Tr4 locked. And the output IBS, being "1", makes the Tr4 in conduction, with relays Ry1, Ry1 turned on. This causes a normally closed contact Ry2-5 turned on, with a coil CBC not conducted, and a power source P, N and the inverter circuit are isolated by a breaker CB.
COPYRIGHT: (C)1979,JPO&Japio
JP15729377A 1977-12-28 1977-12-28 Protection system for transistor inverter circuit Pending JPS5490527A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15729377A JPS5490527A (en) 1977-12-28 1977-12-28 Protection system for transistor inverter circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15729377A JPS5490527A (en) 1977-12-28 1977-12-28 Protection system for transistor inverter circuit

Publications (1)

Publication Number Publication Date
JPS5490527A true JPS5490527A (en) 1979-07-18

Family

ID=15646483

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15729377A Pending JPS5490527A (en) 1977-12-28 1977-12-28 Protection system for transistor inverter circuit

Country Status (1)

Country Link
JP (1) JPS5490527A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58224577A (en) * 1982-06-21 1983-12-26 Matsushita Electric Ind Co Ltd Power converter
JPS61161975A (en) * 1985-01-11 1986-07-22 Hitachi Ltd Protecting device of ac elevator controller
JPS61293180A (en) * 1985-06-21 1986-12-23 Fuji Electric Co Ltd Protecting device for gto thyristor inverter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58224577A (en) * 1982-06-21 1983-12-26 Matsushita Electric Ind Co Ltd Power converter
JPH0219706B2 (en) * 1982-06-21 1990-05-02 Matsushita Denki Sangyo Kk
JPS61161975A (en) * 1985-01-11 1986-07-22 Hitachi Ltd Protecting device of ac elevator controller
JPS61293180A (en) * 1985-06-21 1986-12-23 Fuji Electric Co Ltd Protecting device for gto thyristor inverter

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