JPS54139024A - Transistor inverter - Google Patents

Transistor inverter

Info

Publication number
JPS54139024A
JPS54139024A JP4655978A JP4655978A JPS54139024A JP S54139024 A JPS54139024 A JP S54139024A JP 4655978 A JP4655978 A JP 4655978A JP 4655978 A JP4655978 A JP 4655978A JP S54139024 A JPS54139024 A JP S54139024A
Authority
JP
Japan
Prior art keywords
transformer
current
output
main
load current
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
JP4655978A
Other languages
Japanese (ja)
Inventor
Akira Ishibashi
Kenji Nanto
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 JP4655978A priority Critical patent/JPS54139024A/en
Publication of JPS54139024A publication Critical patent/JPS54139024A/en
Pending legal-status Critical Current

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  • Inverter Devices (AREA)

Abstract

PURPOSE: To reduce the loss of a main transistor and to improve the efficiency of the transistor by detecting load current and increasing or decreasing the current to be applied to a base drive circuit of the main transistor in response to the load current.
CONSTITUTION: Load current is detected by a DC current transformer AD. The detected output from the transformer AD and output from a DC power supply ES are applied to a current control means VC and to a pulse transformer PT for driving the bases of main transistors Q1, Q2. Comparators COMa, b, c compare the output from the transformer AD with set voltages of voltage potentiometers VSa, b, c, respectively to sequentially close shorting means SWa, b, c, respectively to correspondingly increase or decrease the output voltage to thereby control the base currents of the main ransistors Q1, Q2. Thus, it can reduce the loss of the transistors so as to improve the efficiency thereof and to form the entire construction inexpensively.
COPYRIGHT: (C)1979,JPO&Japio
JP4655978A 1978-04-21 1978-04-21 Transistor inverter Pending JPS54139024A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4655978A JPS54139024A (en) 1978-04-21 1978-04-21 Transistor inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4655978A JPS54139024A (en) 1978-04-21 1978-04-21 Transistor inverter

Publications (1)

Publication Number Publication Date
JPS54139024A true JPS54139024A (en) 1979-10-29

Family

ID=12750675

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4655978A Pending JPS54139024A (en) 1978-04-21 1978-04-21 Transistor inverter

Country Status (1)

Country Link
JP (1) JPS54139024A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5996877A (en) * 1982-11-22 1984-06-04 Mitsubishi Electric Corp Inverter circuit
JPS6046779A (en) * 1983-08-25 1985-03-13 Mitsubishi Electric Corp Inverter circuit
US4569011A (en) * 1983-11-14 1986-02-04 Tandem Computers Incorporated Constant current drive for switching power supply
US4672524A (en) * 1985-09-03 1987-06-09 Hitachi, Ltd. Overcurrent and overvoltage protected transistor inverter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5996877A (en) * 1982-11-22 1984-06-04 Mitsubishi Electric Corp Inverter circuit
JPS6046779A (en) * 1983-08-25 1985-03-13 Mitsubishi Electric Corp Inverter circuit
US4569011A (en) * 1983-11-14 1986-02-04 Tandem Computers Incorporated Constant current drive for switching power supply
US4672524A (en) * 1985-09-03 1987-06-09 Hitachi, Ltd. Overcurrent and overvoltage protected transistor inverter

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