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JPS6455071A - Over-voltage limiting system for switching power - Google Patents

Over-voltage limiting system for switching power

Info

Publication number
JPS6455071A
JPS6455071A JP21080687A JP21080687A JPS6455071A JP S6455071 A JPS6455071 A JP S6455071A JP 21080687 A JP21080687 A JP 21080687A JP 21080687 A JP21080687 A JP 21080687A JP S6455071 A JPS6455071 A JP S6455071A
Authority
JP
Japan
Prior art keywords
switching power
pulse
width
power supply
certain value
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
JP21080687A
Other languages
Japanese (ja)
Inventor
Masayuki Hattori
Hideyuki Takamukai
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.)
Fanuc Corp
Original Assignee
Fanuc Corp
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 Fanuc Corp filed Critical Fanuc Corp
Priority to JP21080687A priority Critical patent/JPS6455071A/en
Publication of JPS6455071A publication Critical patent/JPS6455071A/en
Pending legal-status Critical Current

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  • Dc-Dc Converters (AREA)

Abstract

PURPOSE:To eliminate the overshoot of an output voltage by limiting the output pulse width of a pulse-width modulator to a certain value. CONSTITUTION:A switching power supply is composed of a transformer 2, rectifying diode bridges D1-D4, a smoothing capacitor C1, a chopper type switching power supply 3, an inverter 4 and a matching circuit 5 to supply a load laser tube 6 with electricity. Further, said switching power supply is provided with a pulse-width modulator 7, an error amplifier 8, and a pulse-width limiting circuit 9 for controlling a transistor(Tr)Q to limit the output voltage of said chopper type switching power supply 3 to a certain value by limiting the output pulse width of the modulator 7 to a certain value. Thus, when the output voltage is excessive, the output pulse width of the pulse-width modulator 7 is limited to prevent an overvoltage.
JP21080687A 1987-08-25 1987-08-25 Over-voltage limiting system for switching power Pending JPS6455071A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21080687A JPS6455071A (en) 1987-08-25 1987-08-25 Over-voltage limiting system for switching power

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21080687A JPS6455071A (en) 1987-08-25 1987-08-25 Over-voltage limiting system for switching power

Publications (1)

Publication Number Publication Date
JPS6455071A true JPS6455071A (en) 1989-03-02

Family

ID=16595444

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21080687A Pending JPS6455071A (en) 1987-08-25 1987-08-25 Over-voltage limiting system for switching power

Country Status (1)

Country Link
JP (1) JPS6455071A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05137321A (en) * 1991-11-07 1993-06-01 Toyo Electric Mfg Co Ltd Current source circuit
JP2002262544A (en) * 2001-03-05 2002-09-13 Fujitsu Ltd Overvoltage protection device for power supply system, AC / DC converter and DC / DC converter constituting power supply system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5652491A (en) * 1979-10-03 1981-05-11 Matsushita Refrigeration Vendor temperature controller

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5652491A (en) * 1979-10-03 1981-05-11 Matsushita Refrigeration Vendor temperature controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05137321A (en) * 1991-11-07 1993-06-01 Toyo Electric Mfg Co Ltd Current source circuit
JP2002262544A (en) * 2001-03-05 2002-09-13 Fujitsu Ltd Overvoltage protection device for power supply system, AC / DC converter and DC / DC converter constituting power supply system

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