JPS5580122A - Alternating-current constant-current circuit - Google Patents

Alternating-current constant-current circuit

Info

Publication number
JPS5580122A
JPS5580122A JP15510578A JP15510578A JPS5580122A JP S5580122 A JPS5580122 A JP S5580122A JP 15510578 A JP15510578 A JP 15510578A JP 15510578 A JP15510578 A JP 15510578A JP S5580122 A JPS5580122 A JP S5580122A
Authority
JP
Japan
Prior art keywords
trq
current
transformer
constitution
current control
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
JP15510578A
Other languages
Japanese (ja)
Inventor
Yusaku Matsubara
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP15510578A priority Critical patent/JPS5580122A/en
Publication of JPS5580122A publication Critical patent/JPS5580122A/en
Pending legal-status Critical Current

Links

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  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

PURPOSE: To make it possible to obtain a constant current at a high response speed with a little power loss by a miniature and lightweight constitution by varying the amplification degree of a main transistor for current control by a direct-current signal obtained by a current flowing through the secondary side of a voltage-decreasing transformer.
CONSTITUTION: To power supply (e), the primary side of voltage-decreasing transformer T1 and a reverse parallel circuit of main transistors TrQ1 and TrQ1' for current control are connected in series. Then, secondary windings S1 and S2 of transformer T2 are connected to emitters of main Trs Q1 and Q1' and their bases by way of output sides of FET type photocouplers F1 and F2. Next, TrQ1 and TrQ1' are driven at a frequency synchronizing with power supply (e) and input sides of couplers F1 and F2 are limited by a direct-current signal obtained by a current flowing through the secondary side of transformer T1, thereby varying amplification degrees of TrQ1 and TrQ1' for current control by way of couplers. Consequently, the miniature and lightweight constitution can obtain a constant current with a little power loss at a high response speed.
COPYRIGHT: (C)1980,JPO&Japio
JP15510578A 1978-12-14 1978-12-14 Alternating-current constant-current circuit Pending JPS5580122A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15510578A JPS5580122A (en) 1978-12-14 1978-12-14 Alternating-current constant-current circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15510578A JPS5580122A (en) 1978-12-14 1978-12-14 Alternating-current constant-current circuit

Publications (1)

Publication Number Publication Date
JPS5580122A true JPS5580122A (en) 1980-06-17

Family

ID=15598714

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15510578A Pending JPS5580122A (en) 1978-12-14 1978-12-14 Alternating-current constant-current circuit

Country Status (1)

Country Link
JP (1) JPS5580122A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5720016U (en) * 1980-07-07 1982-02-02
JPS59122381A (en) * 1982-12-27 1984-07-14 Mitsubishi Electric Corp Output converter for power source

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4932145B1 (en) * 1970-01-29 1974-08-28
JPS5195266A (en) * 1975-01-10 1976-08-20

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4932145B1 (en) * 1970-01-29 1974-08-28
JPS5195266A (en) * 1975-01-10 1976-08-20

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5720016U (en) * 1980-07-07 1982-02-02
JPS59122381A (en) * 1982-12-27 1984-07-14 Mitsubishi Electric Corp Output converter for power source

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