JPS5457623A - Transistor chopper device - Google Patents

Transistor chopper device

Info

Publication number
JPS5457623A
JPS5457623A JP12348577A JP12348577A JPS5457623A JP S5457623 A JPS5457623 A JP S5457623A JP 12348577 A JP12348577 A JP 12348577A JP 12348577 A JP12348577 A JP 12348577A JP S5457623 A JPS5457623 A JP S5457623A
Authority
JP
Japan
Prior art keywords
turn
base
time
drive circuit
action
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
JP12348577A
Other languages
Japanese (ja)
Inventor
Katsuji Marumoto
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12348577A priority Critical patent/JPS5457623A/en
Publication of JPS5457623A publication Critical patent/JPS5457623A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To promote a reduction of loss in the base drive circuit at the time of turn-on and turn-off operation, by means of providing a driving transistor separately for use of turn-on and turn-off operaion.
CONSTITUTION: In a base drive circuit for a power transistor Tp, are provided transistors T2, T3 for use of turn-on and turn-off operaton. A turn-on action of Tp is operated by a base current supplied through T2, and a turn-off action made to be operated by a turn-off current discharged through T3 at the same time of a turn- off action of Tp. In this way, all of the base current ib, at the time of turn-on of Tp, will flow in Tp only with a charge, accumulated in the base of Tp, discharged at the time of turn-off, consequently, a loss in the base drive circuit at the state of Tp being off will become zero
COPYRIGHT: (C)1979,JPO&Japio
JP12348577A 1977-10-17 1977-10-17 Transistor chopper device Pending JPS5457623A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12348577A JPS5457623A (en) 1977-10-17 1977-10-17 Transistor chopper device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12348577A JPS5457623A (en) 1977-10-17 1977-10-17 Transistor chopper device

Publications (1)

Publication Number Publication Date
JPS5457623A true JPS5457623A (en) 1979-05-09

Family

ID=14861787

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12348577A Pending JPS5457623A (en) 1977-10-17 1977-10-17 Transistor chopper device

Country Status (1)

Country Link
JP (1) JPS5457623A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108966A (en) * 1981-12-22 1983-06-29 ヒユーズ・エアクラフト・カンパニー Power source
JPS5925590A (en) * 1982-08-02 1984-02-09 Matsushita Electric Ind Co Ltd Dc motor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108966A (en) * 1981-12-22 1983-06-29 ヒユーズ・エアクラフト・カンパニー Power source
JPH0465632B2 (en) * 1981-12-22 1992-10-20 Hughes Aircraft Co
JPS5925590A (en) * 1982-08-02 1984-02-09 Matsushita Electric Ind Co Ltd Dc motor
JPH0241278B2 (en) * 1982-08-02 1990-09-17

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