GB2320625A - Controlled semiconductor switches - Google Patents

Controlled semiconductor switches

Info

Publication number
GB2320625A
GB2320625A GB9807069A GB9807069A GB2320625A GB 2320625 A GB2320625 A GB 2320625A GB 9807069 A GB9807069 A GB 9807069A GB 9807069 A GB9807069 A GB 9807069A GB 2320625 A GB2320625 A GB 2320625A
Authority
GB
United Kingdom
Prior art keywords
inverter
currents
phase
active
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.)
Granted
Application number
GB9807069A
Other versions
GB9807069D0 (en
GB2320625B (en
Inventor
Frede Blabjerg
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.)
Danfoss AS
Original Assignee
Danfoss AS
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 Danfoss AS filed Critical Danfoss AS
Publication of GB9807069D0 publication Critical patent/GB9807069D0/en
Publication of GB2320625A publication Critical patent/GB2320625A/en
Application granted granted Critical
Publication of GB2320625B publication Critical patent/GB2320625B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/40—Testing power supplies
    • G01R31/42—AC power supplies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
    • H02H7/1227—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to abnormalities in the output circuit, e.g. short circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/0241—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an overvoltage

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Inverter Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

When measuring fault currents in an inverter, in which controlled semiconductor switches are pulse width modulated, PWM-VSI, to convert a DC voltage from an intermediary circuit to a 3-phase AC voltage, DC currents are measured in the positive and the negative rail of the inverter, so that it is possible to detect faults originating from both short-circuits and earthing faults, maintaining a high sensitivity when reconstructing phase currents, which can be made by a so-called vector modulation, called (SFAVM), in which the states of the individual transistor switches are defined in a vector room (SFAVM) having six active states in which current flows in the inverter and two active states in which no current flows in the inverter. On the basis of the DC current measurements the phase currents can be reconstructed, and all faults can be detected. As mentioned, the measurement takes place as a measurement of DC currents, and for this purpose two transducers are used, which are constructed in a way that at the same current they give two different physical values, so that if there is no fault on the inverter, the phase current can still be reconstructed. The invention is especially expedient in connection with motor controls, active inverters, active filters, compensators, etc.
GB9807069A 1995-10-06 1996-10-03 Method for measuring fault currents in an inverter and inverter with controlled semiconductor switches Expired - Fee Related GB2320625B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK199501118A DK172562B1 (en) 1995-10-06 1995-10-06 Method of measuring fault currents in an inverter, as well as inverters with controlled semiconductor switches
PCT/DK1996/000418 WO1997014205A1 (en) 1995-10-06 1996-10-03 Method for measuring fault currents in an inverter and inverter with controlled semiconductor switches

Publications (3)

Publication Number Publication Date
GB9807069D0 GB9807069D0 (en) 1998-06-03
GB2320625A true GB2320625A (en) 1998-06-24
GB2320625B GB2320625B (en) 2000-02-02

Family

ID=8101220

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9807069A Expired - Fee Related GB2320625B (en) 1995-10-06 1996-10-03 Method for measuring fault currents in an inverter and inverter with controlled semiconductor switches

Country Status (6)

Country Link
CN (1) CN1198849A (en)
AU (1) AU7126196A (en)
DK (1) DK172562B1 (en)
FI (1) FI980790A (en)
GB (1) GB2320625B (en)
WO (1) WO1997014205A1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6456946B1 (en) * 2000-02-25 2002-09-24 Motorola, Inc. System and method for motor fault detection
DE10236377A1 (en) 2002-08-02 2004-02-12 Dr. Johannes Heidenhain Gmbh Error detection method in a drive device
DE10320926A1 (en) * 2003-05-09 2004-12-16 Siemens Ag Procedure and arrangement for testing a final power stage
DE10322195A1 (en) * 2003-05-16 2004-12-09 Siemens Ag Procedure for monitoring a power output stage
EP1498739B1 (en) * 2003-07-12 2006-04-05 Liaisons Electroniques-Mecaniques Lem S.A. Current sensor having a magnetic core with airgap and power supply circuit provided with such sensors
WO2008086973A1 (en) * 2007-01-16 2008-07-24 Basf Se Production of superabsorbent polymers on a continuous belt reactor
BRPI0721437B8 (en) * 2007-03-13 2023-04-25 Siemens Ag DEVICE FOR CONVERTING AN ELECTRIC CURRENT AND METHOD FOR LIMITING DAMAGE TO CONVERTER HAVING POWER SEMICONDUCTORS
FI124174B (en) * 2010-05-03 2014-04-15 Vacon Oyj Measurement of earth fault current
JP5406146B2 (en) * 2010-08-31 2014-02-05 日立オートモティブシステムズ株式会社 Overcurrent detection device and overcurrent detection method for electric drive control device
JP5716394B2 (en) * 2010-12-28 2015-05-13 株式会社リコー High voltage inverter device and leakage detecting device thereof
DE102014201500A1 (en) * 2014-01-28 2015-07-30 Dr. Johannes Heidenhain Gmbh Method for diagnosing a converter
CN105067940A (en) * 2015-08-06 2015-11-18 株洲南车时代电气股份有限公司 Grounding diagnostic method for main loop of locomotive traction converter
CN105487018B (en) * 2015-11-19 2018-06-26 北京金风科创风电设备有限公司 Testing device, electric inverse cutting cabinet and testing system of converter
GB2556946A (en) * 2016-11-29 2018-06-13 Bombardier Primove Gmbh A method and a device for determining a switching current of a converter and a method of control
CN106771777B (en) * 2017-01-20 2023-02-24 江苏恒力化纤股份有限公司 Inverter driving signal detection device of frequency converter
CN112924769B (en) * 2019-12-06 2024-05-24 金风科技股份有限公司 Fault detection method and device for converter and computer equipment

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760258A (en) * 1971-12-29 1973-09-18 Westinghouse Freins & Signaux Static inverter
DE4128961C1 (en) * 1991-08-29 1992-08-13 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De Detecting short circuit to earth in pulse inverter - using square wave HF voltage source in evaluation circuit to operate protection circuit when toroidal transformer saturates

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760258A (en) * 1971-12-29 1973-09-18 Westinghouse Freins & Signaux Static inverter
DE4128961C1 (en) * 1991-08-29 1992-08-13 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De Detecting short circuit to earth in pulse inverter - using square wave HF voltage source in evaluation circuit to operate protection circuit when toroidal transformer saturates

Also Published As

Publication number Publication date
GB9807069D0 (en) 1998-06-03
CN1198849A (en) 1998-11-11
DK111895A (en) 1997-04-07
FI980790A0 (en) 1998-04-06
WO1997014205A1 (en) 1997-04-17
AU7126196A (en) 1997-04-30
GB2320625B (en) 2000-02-02
DK172562B1 (en) 1999-01-18
FI980790A (en) 1998-04-06

Similar Documents

Publication Publication Date Title
GB2320625A (en) Controlled semiconductor switches
JP3704400B2 (en) Abnormality diagnosis method in motor inverter drive control device
KR101192520B1 (en) An apparatus for supplying current from a power source to each phase of a multi-phase motor
US8334670B2 (en) Method and apparatus to monitor an electric motor control circuit
US5955862A (en) Frequency converter for AC motor
US20180302030A1 (en) Inverter having grid disconnection point and insulation resistance measurement and method for measuring an insulation resistance
Boys Novel current sensor for PWM AC drives
CA2143364A1 (en) Field ground fault detector and field ground fault relay for detecting ground fault corresponding to dc component extracted from ground fault current
CA3006506A1 (en) An on-line diagnostic method for electronic switch faults in neutral-point-clamped power converters
JP2006177973A (en) Motor insulation fault detection by sensing ground leakage current
US10605843B2 (en) Inverter open/short failure detection
JPH0389129A (en) Winding temperature measuring apparatus for rotary electric machine
Mocevic et al. Phase current reconstruction based on Rogowski coils integrated on gate driver of SiC MOSFET half-bridge module for continuous and discontinuous PWM inverter applications
JP4925595B2 (en) AC impedance measuring apparatus and method
ES2111595T3 (en) DOUBLE OUTPUT BATTERY WITH LEAK DETECTION.
JP3910357B2 (en) Electric vehicle control device
US20110110138A1 (en) Methods and Systems for Phase Current Reconstruction of AC Drive Systems
JPS63265516A (en) Ground-fault detector for three-phase ac circuit
ES2906373T3 (en) Procedure for checking a switch-off point of a PV inverter and such a PV inverter
EP0565656A1 (en) Ac/dc converter fault detector
CN111245335B (en) Inverter control device and method and open winding motor control system
RU2121150C1 (en) Continuous following system for controlling alternating current supply system electric conductivity
Bogdanovs et al. Indirect Multiple DC Link Current Sensing Using Op-Amp Circuits in a Three-Phase Three-Level PWM Inverter
SU1576874A1 (en) Method of determining full conductance of insulation of three-phase network with insulated neutral
SU1737381A1 (en) Device for indicating interturn locking in three-phase electric motor

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20001003