JPH01136562A - Protective circuit for inverter - Google Patents

Protective circuit for inverter

Info

Publication number
JPH01136562A
JPH01136562A JP29365187A JP29365187A JPH01136562A JP H01136562 A JPH01136562 A JP H01136562A JP 29365187 A JP29365187 A JP 29365187A JP 29365187 A JP29365187 A JP 29365187A JP H01136562 A JPH01136562 A JP H01136562A
Authority
JP
Japan
Prior art keywords
current value
current
inverter
transistors
transistor
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.)
Granted
Application number
JP29365187A
Other languages
Japanese (ja)
Other versions
JPH065984B2 (en
Inventor
Masayasu Hasegawa
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP29365187A priority Critical patent/JPH065984B2/en
Publication of JPH01136562A publication Critical patent/JPH01136562A/en
Publication of JPH065984B2 publication Critical patent/JPH065984B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To ensure overcurrent protection, by detecting a current of a smoothing circuit, and in the period when the current value is larger than a predetermined reference level by stopping the operation of a second switching element.
CONSTITUTION: A voltage controlling section of a DC chopper control inverter comprises first and second transistors(Tr) 2 and 3 for performing a chopper operation of a DC power source 1, first and second diodes 4 and 5 connected in parallel to the transistors 2 and 3 respectively, a smoothing choke coil 6 and capacitor 7, and an inverter 9. The voltage controlling section feeds a current to a load, a three-phase induction motor 10. Further, provided are current detecting means 15 of the choke coil 6, a reference current value 16 with a predetermined hysteresis characteristic, current value comparing means 16 and a base signal interlocking circuit 17 for performing cutoff of the base of the second transistor 3. Thus, in the period when the current value of the smoothing circuit is more than the reference current value 16, the operation of the second transistor 3 is stopped and regenerated to the DC power source 1.
COPYRIGHT: (C)1989,JPO&Japio
JP29365187A 1987-11-20 1987-11-20 Inverter device protection circuit Expired - Lifetime JPH065984B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29365187A JPH065984B2 (en) 1987-11-20 1987-11-20 Inverter device protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29365187A JPH065984B2 (en) 1987-11-20 1987-11-20 Inverter device protection circuit

Publications (2)

Publication Number Publication Date
JPH01136562A true JPH01136562A (en) 1989-05-29
JPH065984B2 JPH065984B2 (en) 1994-01-19

Family

ID=17797472

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29365187A Expired - Lifetime JPH065984B2 (en) 1987-11-20 1987-11-20 Inverter device protection circuit

Country Status (1)

Country Link
JP (1) JPH065984B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2447875A (en) * 2007-03-30 2008-10-01 Wolfson Microelectronics Plc Short Circuit Protection of DC to DC converter
KR100885274B1 (en) * 2007-04-19 2009-02-26 (주)매그플러스 Inverter circuit
JP2009059714A (en) * 2008-11-14 2009-03-19 Shibaura Mechatronics Corp Power source, power source for sputtering, and sputtering device
JP2009059715A (en) * 2008-11-14 2009-03-19 Shibaura Mechatronics Corp Power source, sputtering power source, and sputtering device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2447875A (en) * 2007-03-30 2008-10-01 Wolfson Microelectronics Plc Short Circuit Protection of DC to DC converter
GB2447875B (en) * 2007-03-30 2011-07-13 Wolfson Microelectronics Plc Short circuit protection
KR100885274B1 (en) * 2007-04-19 2009-02-26 (주)매그플러스 Inverter circuit
JP2009059714A (en) * 2008-11-14 2009-03-19 Shibaura Mechatronics Corp Power source, power source for sputtering, and sputtering device
JP2009059715A (en) * 2008-11-14 2009-03-19 Shibaura Mechatronics Corp Power source, sputtering power source, and sputtering device

Also Published As

Publication number Publication date
JPH065984B2 (en) 1994-01-19

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