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WO2018124374A1 - Disjoncteur différentiel pour chargeur de véhicule électrique - Google Patents

Disjoncteur différentiel pour chargeur de véhicule électrique Download PDF

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Publication number
WO2018124374A1
WO2018124374A1 PCT/KR2017/001344 KR2017001344W WO2018124374A1 WO 2018124374 A1 WO2018124374 A1 WO 2018124374A1 KR 2017001344 W KR2017001344 W KR 2017001344W WO 2018124374 A1 WO2018124374 A1 WO 2018124374A1
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WO
WIPO (PCT)
Prior art keywords
current
diagnostic
load
leakage
transmission line
Prior art date
Application number
PCT/KR2017/001344
Other languages
English (en)
Korean (ko)
Inventor
최지현
최승우
Original Assignee
엘에스산전 주식회사
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 엘에스산전 주식회사 filed Critical 엘에스산전 주식회사
Publication of WO2018124374A1 publication Critical patent/WO2018124374A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0069—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to the isolation, e.g. ground fault or leak current
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/04—Cutting off the power supply under fault conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • 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
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Definitions

  • the present invention relates to an earth leakage breaker, and more particularly, to an earth leakage breaker of an electric vehicle charger capable of performing self-diagnosis in real time in an electric vehicle charger.
  • Electric vehicles or hybrid vehicles require electric energy to drive a motor used to drive the vehicle, which is supplied through a battery.
  • Batteries used in electric vehicles or hybrid vehicles are mainly composed of secondary batteries capable of repeating a discharge process of converting chemical energy into electrical energy and a charging process of converting electrical energy into chemical energy.
  • Secondary batteries include nickel cadmium batteries, nickel hydrogen batteries, lithium ion batteries and lithium ion polymer batteries.
  • the battery of the electric vehicle is to be charged with electrical energy of high potential
  • the battery and its management device should be kept insulated from other external devices.
  • a leakage current is generated. If a leakage current is generated, it may primarily cause discharge of the battery and malfunction or failure of the electronic devices equipped with the battery.
  • the charging device of the electric vehicle is provided with an earth leakage blocking device that can automatically detect the leakage current to cut off the circuit.
  • FIG. 1 is a view showing an earth leakage breaker of a conventional electric vehicle charger.
  • a ground fault interrupting device 20 of a conventional electric vehicle charger is disposed between an external power source 10 and a load 30.
  • the external power source 10 is a current source or a voltage source for charging the battery of the electric vehicle.
  • the load 30 is a battery of an electric vehicle.
  • the ground fault interrupting device 20 includes a switch unit 21, a ground fault sensor 22, a control unit 23, a display unit 24, and a diagnostic unit 25.
  • the switch unit 21 includes a first switch SW1 and a second switch SW2 connected to each of a plurality of lines through which current is transmitted from the external power source 10.
  • the first switch SW1 and the second switch SW2 are opened and closed under the control of the controller 23.
  • the earth leakage sensor 22 is disposed to surround a plurality of lines between the switch unit 21 and the load 30, and detects a leakage current by using a difference in current flowing through the plurality of lines.
  • the controller 23 determines whether the current is leaked based on the signal output from the ground fault sensor 22.
  • the control unit 23 controls the opening and closing operation of the switch unit 21 and the display operation of the display unit 24 according to the determination result.
  • the diagnosis unit 25 self-diagnoses the operating states of the ground fault interrupting device 20, that is, the ground fault sensor 22 and the control unit 23.
  • the diagnosis unit 25 configures one line connecting the external power source 10 and the load 30 by the third switch SW3.
  • the third switch SW3 closes by differentiating the amount of current applied from the external power supply 10 to the load 30 and the amount of current fed back from the load 30, the ground fault sensor 22 detects this.
  • the control unit 23 diagnoses whether the switch unit 21 is properly opened or closed.
  • the earth leakage breaker 20 of the conventional electric vehicle charger detects a leakage current between the external power source 10 and the load 30 and cuts off the connection thereof, thereby causing malfunction or failure of electronic devices or damage to the user. Will be prevented.
  • the conventional ground fault interrupting device 20 is configured by being connected to a plurality of lines for transmitting the current from the external power supply 10 to the load 30 by the diagnostic section 25, and thus, the circuit breaker by the diagnostic section 25. There is difficulty in self-diagnosis of the device 20.
  • the diagnostic unit 25 in order to operate the diagnostic unit 25 in the conventional earth leakage breaker 20, a predetermined diagnostic current must be transmitted through a plurality of lines from the external power source 10. Therefore, when the diagnosis unit 25 performs the self-diagnosis while the load 30 is connected to a plurality of lines, the load 30 may cause device damage such as a charging failure. Therefore, in order to prevent damage to the load 30, the third switch SW3 of the diagnosis unit 25 is opened and closed for a very short time, so that it is difficult to accurately diagnose the operating state of the ground fault interrupting device 20, and also the life of the switch. Problems also occur. This lowers the operation reliability of the ground fault interrupting device 20.
  • An electric leakage blocking device of an electric vehicle charger includes a plurality of switches connected to a current transmission line and a feedback transmission line between an external power source and a load; A diagnostic unit connected to the diagnostic line and outputting a diagnostic current; An electric leakage sensor disposed surrounding the current transmission line, the feedback transmission line, and the diagnostic line, and detecting a leakage current from the current transmission line, the feedback transmission line, and the diagnostic line; And a control unit controlling the connection of the external power source and the load by controlling the opening / closing operation of the plurality of switches according to a result of comparing the leakage current with a reference value.
  • the diagnostic line is only connected to the diagnostic unit.
  • the diagnostic current is an alternating current having a level equal to or higher than the reference value.
  • the diagnostic unit includes a first signal generator and a second signal generator commonly connected to the diagnostic line, the first signal generator outputs an AC current as a first diagnostic current, and the second signal generator includes a DC current. Is output as the second diagnostic current.
  • the first and second diagnostic currents have a level equal to or greater than the reference value.
  • the first and second diagnostic currents are sequentially output.
  • the diagnostic unit outputs the diagnostic current during the charging preparation section of the load or outputs the diagnostic current in the charging section of the load.
  • the plurality of switches includes a first switch connected to the current transmission line and a second switch connected to the feedback transmission line, and the control unit simultaneously opens and closes the first switch and the second switch according to the comparison result.
  • the earth leakage breaker of the electric vehicle charger is provided with a diagnostic unit connected to a separate diagnostic line, the diagnostic unit outputs a diagnostic current through the diagnostic line, the self-diagnosis operation state of the earth leakage sensor and the control unit can do.
  • the earth leakage breaker does not need to apply a leakage current to the current transmission line through which the charging current is transmitted for self-diagnosis, thereby preventing damage to the load due to self-diagnosis.
  • FIG. 1 is a view showing an earth leakage breaker of a conventional electric vehicle charger.
  • FIG. 2 is a diagram illustrating a configuration of an earth leakage breaker according to an exemplary embodiment of the present invention.
  • FIG. 3 is a view illustrating an operation of the ground fault interrupting device of FIG. 2.
  • FIG. 4 is a diagram illustrating a configuration of an earth leakage breaker according to another exemplary embodiment of the present invention.
  • FIG. 5 is a diagram illustrating an operation of the earth leakage breaker of FIG. 4.
  • FIG. 2 is a diagram illustrating a configuration of an earth leakage breaker according to an exemplary embodiment of the present invention.
  • the earth leakage breaker 100 of the present embodiment is configured inside the charger of the electric vehicle, it may be disposed between the external power source 10 and the load 30.
  • the earth leakage breaker 100 may protect the load 30 from an overvoltage caused by leakage of current flowing through a plurality of lines from the external power source 10.
  • the earth leakage blocking device 100 may include a switch unit 110, an earth leakage sensor 120, a control unit 130, a display unit 140, and a diagnosis unit 150.
  • the switch unit 110 may control a connection between the external power source 10 and the load 30.
  • the switch unit 110 may include a plurality of switches, for example, a first switch SW1 and a second switch SW2.
  • the first switch SW1 and the second switch SW2 may be opened and closed under the control of the controller 130 to electrically connect the external power source 10 and the load 30.
  • the first switch SW1 may be connected to a current transmission line IL connecting between the external power source 10 and the load 30.
  • the first switch SW1 may be opened or closed according to the switching control signal SCS provided by the controller 130.
  • SCS switching control signal
  • the second switch SW2 may be connected to a feedback transmission line FL connecting the external power source 10 and the load 30.
  • the second switch SW2 may be opened or closed according to the switching control signal SCS provided by the controller 130.
  • SCS switching control signal
  • the first switch SW1 and the second switch SW2 may be simultaneously switched to open and close.
  • the earth leakage sensor 120 may be disposed between the switch unit 110 and the load 30 to surround a plurality of lines, for example, a current transmission line IL, a feedback transmission line FL, and a diagnostic line TL. .
  • the earth leakage sensor 120 may detect a leakage current by using a difference in current flowing through a plurality of lines.
  • the earth leakage sensor 120 may output the detected leakage current to the controller 130.
  • the earth leakage sensor 120 may be configured as an image current transformer.
  • the controller 130 may compare the leakage current value detected by the ground fault sensor 120 with a preset reference value.
  • the controller 130 may output a control signal, that is, a switching control signal SCS, to the switch unit 110 according to the comparison result.
  • the controller 130 may output the display control signal DCS to the display unit 140 according to the comparison result.
  • an input current flows through the current transmission line IL, and an output current flows through the feedback transmission line FL.
  • their magnitude is the same and the direction of current is reversed. Therefore, since the magnetic flux generated by each current cancel each other, the earth leakage sensor 120 outputs a leakage current corresponding to 0 to the controller 130.
  • the controller 130 determines whether the line is leaked by converting the leakage current output from the ground fault sensor 120 into a voltage. Since the leakage current provided from the ground fault sensor 120 is 0, the controller 130 may determine that no leakage occurs. Therefore, the controller 130 may maintain the closed state of the switch 110.
  • the controller 130 converts the leakage current output from the ground fault sensor 120 into a voltage to determine whether the leakage occurs. At this time, the controller 130 determines that leakage occurs when the voltage according to the leakage current is greater than the preset reference value. Accordingly, the controller 130 may output the switching control signal SCS to the switch unit 110.
  • the switch unit 110 opens the internal switches according to the switching control signal SCS to block the connection of the external power source 10 and the load 30.
  • the controller 130 outputs the display control signal DCS to the display unit 140.
  • the display unit 140 displays the current state, ie, leakage, to the outside according to the display control signal DCS.
  • the controller 130 may be variously implemented as a microcomputer, a controller, or a microcontroller.
  • the controller 130 may be implemented separately, and may be implemented such that one component controls some components and another component controls other components.
  • the controller 130 is divided into a first controller for controlling the ground fault sensor 120 and a second controller for determining leakage of current according to an output value of the ground fault sensor 120 and performing a corresponding control. Can be configured.
  • control unit 130 may further include a trip coil (not shown) for opening and closing operations of each switch of the switch unit 110.
  • the trip coil may be operated according to the switching control signal SCS generated by the controller 130 to open and close the first switch SW1 and the second switch SW2 of the switch unit 110.
  • the display unit 140 may externally display a current line state, that is, a normal state or a leakage state, according to the display control signal DCS output from the controller 130.
  • the display unit 140 may be configured as a display panel for displaying a predetermined image or a lamp or LED for emitting light.
  • the diagnosis unit 150 may perform self-diagnosis of an operating state of the ground fault interrupting device 100, that is, an operating state of the ground fault sensor 120 and the controller 130.
  • the diagnosis unit 150 may include a resistance element R and a signal generator 155 connected to the diagnosis line TL surrounded by the ground fault sensor 120.
  • the diagnostic line TL is connected only to the diagnosis unit 150.
  • the signal generator 155 of the diagnostic unit 150 may output a diagnostic current having a predetermined magnitude to the diagnostic line TL through the resistor R.
  • FIG. Due to such a diagnosis current a magnetic flux deviation due to a current difference is generated in a plurality of lines, that is, the current transmission line IL, the feedback transmission line FL, and the diagnostic line TL. Therefore, the ground fault sensor 120 may detect a leakage current according to the magnetic flux deviation and output it to the controller 130. Thereafter, the operation of the controller 130 may be the same as described above.
  • the diagnostic current output from the signal generator 155 of the diagnostic unit 150 may have a level substantially equal to or higher than the reference value set in the controller 130.
  • the signal generator 155 may be configured as a micro controller (MCU) for outputting a pulse width modulated signal PWM.
  • the signal generator 155 may output the diagnostic current in a specific operation section of the electric vehicle charger or output the diagnostic current at all times according to external control.
  • the earth leakage breaker 100 of the present embodiment is provided with a diagnostic unit 150 for self-diagnosis of the operating state
  • the diagnostic unit 150 may be configured to be connected to a separate diagnostic line (TL). have. Therefore, in the self-diagnosis of the ground fault interrupting device 100, a leakage current for self-diagnosis does not flow into a line between the external power supply 10 and the load 30, that is, the current transmission line IL and the feedback transmission line FL. Since it is not necessary, damage to the load 30 due to self-diagnosis can be prevented.
  • the diagnosis unit 150 since the diagnosis unit 150 is configured to be connected to a separate diagnosis line TL, the self-diagnosis of the ground fault interrupting device 100 may be performed in real time.
  • FIG. 3 is a view illustrating an operation of the ground fault interrupting device of FIG. 2.
  • the load 30 is connected to the external power source 10 through the earth leakage breaker 100.
  • the first switch SW1 and the second switch SW2 of the ground fault interrupting device 100 are both turned on, that is, closed.
  • the signal generator 155 of the diagnostic unit 150 may output a diagnostic current LC_T of a predetermined magnitude through the diagnostic line TL at a specific time, for example, in a preparation section before charging of the load 30 is started.
  • the diagnostic current LC_T may be an alternating current having a predetermined frequency band, for example, 50 to 60 Hz frequency band.
  • the diagnostic current LC_T may be substantially the same level or higher than the reference values Ref1 and Ref2 set in the controller 130.
  • the diagnostic current LC_T may be output for several ms.
  • the diagnostic current LC_T flows through the diagnostic line TL, a magnetic flux deviation occurs in the current transmission line IL, the feedback transmission line FL, and the diagnostic line TL surrounded by the ground fault sensor 120. .
  • the earth leakage sensor 120 may detect this and output it to the controller 130.
  • the ground fault sensor 120 detects the magnetic flux deviation generated by the diagnostic current LC_T. The leaked current may be output to the controller 130.
  • the controller 130 may determine whether the leakage is based on the leakage current provided from the ground fault sensor 120. Since the diagnostic current LC_T has a level equal to or greater than the reference values Ref1 and Ref2 set in the controller 130, the controller 130 may determine that leakage has occurred.
  • the controller 130 may output the switching control signal SCS and the display control signal DCS according to the leakage determination.
  • the reference values Ref1 and Ref2 may include a positive reference value Ref1 and a negative reference value Ref2.
  • the switch unit 110 turns off the first switch SW1 and the second switch SW2 in response to the switching control signal SCS to open the first switch SW1 and the second switch SW2 to cut off the connection between the external power source 10 and the load 30. Let's do it.
  • the display unit 140 externally indicates that leakage has occurred in response to the display control signal DCS.
  • the earth leakage breaker 100 outputs a diagnosis current LC_T through the diagnosis unit 150 in the charge preparation section before the charge of the load 30 is started, thereby causing the earth leakage sensor 120. And an operating state of the controller 130. Therefore, the ground fault interrupting device 100 determines the leakage of the line by operating the ground fault sensor 120 and the controller 130 normally in the charging section in which the actual charge of the load 30 is made, and accordingly, the external power source 10. And control the connection between the load 30. Therefore, the operation reliability of the ground fault interrupting device 100 can be improved.
  • diagnosis unit 150 may output the diagnosis current LC_T in the charging section of the load 30 to diagnose the operating state of the ground fault sensor 120 and the controller 130 in real time.
  • FIG. 4 is a diagram illustrating a configuration of an earth leakage breaker according to another exemplary embodiment of the present invention.
  • the earth leakage breaker 101 is configured inside the charger of the electric vehicle, and may be disposed between the external power source 10 and the load 30.
  • the earth leakage blocking device 101 may include a switch unit 110, an earth leakage sensor 120, a control unit 130, a display unit 140, and a diagnosis unit 151.
  • the switch unit 110 may include a first switch SW1 and a second switch SW2 that are opened and closed under the control of the controller 130 to electrically connect the external power source 10 and the load 30.
  • the first switch SW1 may be connected to the current transmission line IL
  • the second switch SW2 may be connected to the feedback transmission line FL.
  • the earth leakage sensor 120 may be disposed surrounding the current transmission line IL, the feedback transmission line FL, and the diagnostic line TL.
  • the earth leakage sensor 120 may detect a leakage current and output the leakage current to the controller 130.
  • the controller 130 compares the leakage current provided from the ground fault sensor 120 with a reference value, determines whether there is leakage according to the result, and outputs a switching control signal SCS and a display control signal DCS according to the determination result. Can be.
  • the display unit 140 may display a normal state or a leaked state to the outside according to the display control signal DCS provided from the controller 130.
  • the diagnosis unit 151 may self-diagnose operation states of the earth leakage sensor 120 and the controller 130 of the earth leakage blocking device 101.
  • the diagnosis unit 151 may include a first signal generator 156, a second signal generator 157, and resistance elements commonly connected to the diagnostic line TL, such as the first resistor R1 and the second resistor R2. ) May be included.
  • the diagnostic line TL may be connected only to the diagnosis unit 151.
  • the first signal generator 156 of the diagnostic unit 151 may output the first diagnostic current to the diagnostic line TL through the first resistor R1.
  • the first diagnostic current may be an alternating current.
  • the second signal generator 157 of the diagnostic unit 151 may output the second diagnostic current to the diagnostic line TL through the second resistor R2.
  • the second diagnostic current may be a direct current.
  • the first signal generator 156 and the second signal generator 157 may be operated simultaneously to simultaneously output the first and second diagnostic currents or sequentially output the first and second diagnostic currents, respectively. .
  • the magnetic flux deviation due to the current difference is generated in the current transmission line IL, the feedback transmission line FL, and the diagnostic line TL by the first diagnostic current and the second diagnostic current output from the diagnosis unit 151. Therefore, the ground fault sensor 120 may detect a leakage current according to the magnetic flux deviation and output it to the controller 130. Thereafter, the operation of the controller 130 may be the same as described above.
  • the first diagnostic current and the second diagnostic current may have a level substantially equal to or higher than the reference value set in the controller 130.
  • FIG. 5 is a diagram illustrating an operation of the earth leakage breaker of FIG. 4.
  • the load 30 is connected to the external power source 10 through the earth leakage breaker 101.
  • the first switch SW1 and the second switch SW2 of the ground fault interrupting device 101 are both turned on, that is, closed.
  • the first signal generation unit 156 and the second signal generation unit 157 of the diagnosis unit 151 have a first diagnosis current LC_T1 of a predetermined magnitude in a charging preparation section before charging of the load 30 is started. And a second diagnostic current LC_T2 to the diagnostic line TL.
  • the first diagnostic current LC_T1 is an AC current having a level substantially the same as or higher than the reference values Ref1 and Ref2 set in the controller 130.
  • the second diagnostic current LC_T2 is a DC current having a level substantially the same as or higher than the reference values Ref1 and Ref2 set in the controller 130.
  • the first diagnostic current LC_T1 and the second diagnostic current LC_T2 may be sequentially output or simultaneously output.
  • the first diagnostic current LC_T1 and the second diagnostic current LC_T2 may be output for several ms, respectively.
  • the earth leakage sensor 120 may detect this and output it to the controller 130.
  • the ground fault sensor 120 since the external power supply 10 does not apply a current to the current transmission line IL, that is, a charging current of the load 30, the ground fault sensor 120 has a first diagnostic current LC_T1 or a second diagnostic current LC_T2. ) May output the detected leakage current to the controller 130.
  • the controller 130 may determine whether the leakage is based on the leakage current provided from the ground fault sensor 120. Since the first diagnostic current LC_T1 and the second diagnostic current LC_T2 have the same or higher level than the reference values Ref1 and Ref2 set in the controller 130, the controller 130 determines that leakage has occurred. can do.
  • the diagnosis unit 151 may sequentially output the first diagnostic current LC_T1 and the second diagnostic current LC_T2. Therefore, the controller 130 checks whether the line is leaked from the leakage current provided from the ground fault sensor 120 according to the first diagnostic current LC_T1 and the leakage current provided from the ground fault sensor 120 according to the second diagnostic current LC_T2. Each can be judged.
  • the controller 130 may output the switching control signal SCS and the display control signal DCS according to the leakage determination.
  • the reference values Ref1 and Ref2 may include positive reference values Ref1 and Ref2 and negative reference values Ref1 and Ref2.
  • the switch unit 110 turns off the first switch SW1 and the second switch SW2 in response to the switching control signal SCS to open the first switch SW1 and the second switch SW2 to cut off the connection between the external power source 10 and the load 30. Let's do it.
  • the display unit 140 externally indicates that leakage has occurred in response to the display control signal DCS.
  • the earth leakage breaker 101 uses the first diagnosis current LC_T1 and the second diagnosis current through the diagnosis unit 151 in the charge preparation section before the charging of the load 30 is started.
  • LC_T2 By outputting (LC_T2), it is possible to diagnose the operating state of the ground fault sensor 120 and the controller 130. Therefore, the ground fault interrupting device 101 determines whether the ground fault sensor 120 and the control unit 130 are normally operated in the charging section in which the actual charging of the load 30 is performed, and thus determines the leakage of the line. And control the connection between the load 30.
  • this embodiment is described as an example in which the diagnostic unit 151 operates in the charge preparation section of the load 30, but is not limited thereto.
  • the diagnosis unit 151 may output the diagnosis currents LC_T1 and LC_T2 in the charging section of the load 30 to diagnose the operating states of the ground fault sensor 120 and the controller 130 in real time.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

La présente invention comprend : une pluralité de commutateurs connectés respectivement à une ligne de transfert de courant et à une ligne de transfert de rétroaction entre une source d'alimentation externe et une charge ; une unité de diagnostic connectée à une ligne de diagnostic de façon à délivrer un courant de diagnostic ; un capteur de perte à la terre conçu pour comprendre la ligne de transfert de courant, la ligne de transfert de rétroaction et la ligne de diagnostic, et détectant un courant de fuite qui en sort ; et une unité de commande commandant des opérations d'ouverture/fermeture de la pluralité de commutateurs en fonction du résultat d'une comparaison entre le courant de fuite et une valeur de référence de façon à commander la connexion entre la source d'alimentation externe et la charge. La présente invention présente donc l'avantage de permettre à un chargeur de véhicule électrique d'effectuer un auto-diagnostic en temps réel.
PCT/KR2017/001344 2016-12-26 2017-02-07 Disjoncteur différentiel pour chargeur de véhicule électrique WO2018124374A1 (fr)

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KR1020160179348A KR20180075242A (ko) 2016-12-26 2016-12-26 전기자동차 충전기의 누전차단장치
KR10-2016-0179348 2016-12-26

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KR102338533B1 (ko) * 2019-10-14 2021-12-15 모트랩(주) 전기자동차용 충전케이블 제어장치 및 그 제어방법
KR102256011B1 (ko) 2020-09-29 2021-05-25 (주)이카플러그 전기 자동차 충전기의 누전 검출 및 차단 방법
KR102497871B1 (ko) 2022-09-15 2023-02-08 홍정애 전기자동차 충전기용 누전차단기
KR102608745B1 (ko) * 2023-06-14 2023-12-06 주식회사 에코스 이종의 이상 전류로 인한 사고를 방지할 수 있는 전기차충전시스템

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100817332B1 (ko) * 2006-10-19 2008-03-27 대성전기공업 주식회사 엘씨디아이형 누설전류 차단기
US20110222194A1 (en) * 2010-03-09 2011-09-15 Kinsel Hugh T Method and Apparatus for Supervisory Circuit for Ground Fault Circuit Interrupt Device
US20120146655A1 (en) * 2010-12-10 2012-06-14 Raritan Americas, Inc. Methods and apparatus for sensing ground leakage and automated self testing thereof
US20130141110A1 (en) * 2006-11-02 2013-06-06 Texas Instruments Incorporated Methods and apparatus for continuous ground fault self-test
KR101410745B1 (ko) * 2012-06-15 2014-06-24 한국전기연구원 누전차단기 및 그 제어 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100817332B1 (ko) * 2006-10-19 2008-03-27 대성전기공업 주식회사 엘씨디아이형 누설전류 차단기
US20130141110A1 (en) * 2006-11-02 2013-06-06 Texas Instruments Incorporated Methods and apparatus for continuous ground fault self-test
US20110222194A1 (en) * 2010-03-09 2011-09-15 Kinsel Hugh T Method and Apparatus for Supervisory Circuit for Ground Fault Circuit Interrupt Device
US20120146655A1 (en) * 2010-12-10 2012-06-14 Raritan Americas, Inc. Methods and apparatus for sensing ground leakage and automated self testing thereof
KR101410745B1 (ko) * 2012-06-15 2014-06-24 한국전기연구원 누전차단기 및 그 제어 방법

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