WO2018116860A1 - Dispositif de détection d'anomalie de trajet électrique et commutateur équipé d'un tel dispositif de détection - Google Patents

Dispositif de détection d'anomalie de trajet électrique et commutateur équipé d'un tel dispositif de détection Download PDF

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Publication number
WO2018116860A1
WO2018116860A1 PCT/JP2017/044106 JP2017044106W WO2018116860A1 WO 2018116860 A1 WO2018116860 A1 WO 2018116860A1 JP 2017044106 W JP2017044106 W JP 2017044106W WO 2018116860 A1 WO2018116860 A1 WO 2018116860A1
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WIPO (PCT)
Prior art keywords
voltage
unit
switching element
power supply
abnormality detection
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PCT/JP2017/044106
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English (en)
Japanese (ja)
Inventor
翔 毛
宏一 山添
澤田　知行
省互 一村
航 原田
Original Assignee
パナソニックＩｐマネジメント株式会社
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to CN201780078906.7A priority Critical patent/CN110088871B/zh
Publication of WO2018116860A1 publication Critical patent/WO2018116860A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • 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
    • 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
    • H02H3/24—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 undervoltage or no-voltage
    • H02H3/253—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 undervoltage or no-voltage for multiphase applications, e.g. phase interruption

Definitions

  • the present disclosure relates to an electric circuit abnormality detection device and a switch including the same. More specifically, the present disclosure relates to an electric circuit abnormality detection device that detects the presence or absence of an abnormality in an electric circuit to be detected, and a switch including the same.
  • an earth leakage breaker that forcibly opens a main contact when a leakage current flowing through a main circuit is detected or a phase failure of a neutral wire is detected (see, for example, Patent Document 1).
  • the earth leakage protection IC for detecting the earth leakage current
  • the phase failure protection IC for detecting the phase failure of the neutral wire
  • the earth leakage protection IC and the phase failure protection IC
  • a power supply circuit section for supplying an operating voltage.
  • the AC voltage is rectified by a diode bridge, and the pulsating voltage output from the diode bridge is stepped down by a series circuit of a plurality of resistors.
  • the power supply circuit unit obtains the operating voltages of the leakage protection IC and the phase loss protection IC by making the voltage stepped down by a series circuit of a plurality of resistors constant by a Zener diode and smoothing it by a smoothing capacitor. .
  • the pulsating voltage output from the diode bridge is stepped down by a series circuit of a plurality of resistors, so that the internal temperature of the earth leakage breaker can rise due to the heat generated by the resistors. There is sex.
  • An object of the present disclosure is to provide an electric circuit abnormality detection device capable of reducing heat generation in a power supply circuit unit, and a switch including the same.
  • the electric circuit abnormality detection device includes an abnormality detection unit that detects whether there is an abnormality in an electric circuit to be detected, and a power supply circuit unit that outputs a power supply voltage to the abnormality detection unit.
  • the power supply circuit unit includes an input terminal unit, a power storage unit, an output terminal unit, a switch unit, a voltage detection unit, and a control unit.
  • the electric circuit to be detected is electrically connected to the input terminal portion.
  • the power storage unit is charged by a DC voltage input to the input terminal unit.
  • the abnormality detection unit is electrically connected to the output terminal unit.
  • the output terminal unit is a terminal unit for outputting a voltage charged in the power storage unit to the abnormality detection unit as the power supply voltage.
  • the switch unit is configured to change a state of the power storage unit between a charge state in which a charge current flows from the electric circuit to be detected to the power storage unit via the input terminal unit and a charge stop state in which a charge current does not flow to the power storage unit. Switch to one.
  • the voltage detection unit detects the power supply voltage output from the power storage unit to the abnormality detection unit.
  • the control unit controls the switch unit according to a detection result of the voltage detection unit.
  • the switch includes the electric circuit abnormality detection device and a power switch that is electrically connected to the electric circuit to be detected.
  • the power switch is controlled by the electric circuit abnormality detection device based on a detection result of the abnormality detection unit.
  • FIG. 1 is a circuit diagram of a switch including an electrical path abnormality detection device according to an embodiment of the present disclosure.
  • FIG. 2 is a circuit diagram of a switch according to Modification 1 of the embodiment of the present disclosure.
  • FIG. 3 is a circuit diagram of a switch according to Modification 2 of the embodiment of the present disclosure.
  • the electric circuit abnormality detection device 10 is provided in a switch 1 with a leakage breaker function.
  • the switch 1 is housed in a distribution board installed in a building such as a house, and is used as a main switch.
  • the switch 1 is electrically connected to the four electric paths 2 in, for example, a three-phase four-wire distribution system that supplies three-phase AC power using the four electric paths 2.
  • the switch 1 has an earth leakage cutoff function and functions to cut off the power supply to the load when a ground fault occurs.
  • the switch 1 is electrically connected to four electric circuits 2 from an AC power source 3.
  • a conductive member 4 that is electrically connected to each of the four electric paths 2 is housed inside the switch 1.
  • the four electric circuits 2 include an R-phase electric circuit 2R, an S-phase electric circuit 2S, a T-phase electric circuit 2T, and an N-phase electric circuit 2N.
  • the four conductive members 4 include an R-phase conductive member 4R, an S-phase conductive member 4S, a T-phase conductive member 4T, and an N-phase conductive member 4N.
  • Switch 1 is an earth leakage circuit breaker having an earth leakage detection function.
  • the switch 1 includes an electrical path abnormality detection device 10 and four contacts 5b (power switches) that are electrically connected to the four conductive members 4, respectively.
  • the electric circuit abnormality detection device 10 detects the presence or absence of abnormality in the electric circuit 2 to be detected, and the contact 5b is controlled based on the abnormality detection result by the electric circuit abnormality detection device 10.
  • the electric circuit abnormality detection device 10 includes a power supply circuit unit 20 and an abnormality detection unit 60.
  • the abnormality detection unit 60 uses the four electric circuits 2 electrically connected to the AC power supply 3 as detection targets, and detects the presence / absence of an abnormality in the four electric circuits 2 that are detection targets.
  • the abnormality detection unit 60 of the present embodiment detects that there is an abnormality in the electric circuit 2 when detecting a leakage current in any of the four electric circuits 2.
  • the power supply circuit unit 20 obtains electric power from the electric circuit 2 to be detected and outputs the power supply voltage V1 to the abnormality detection unit 60.
  • the power supply circuit unit 20 includes an input terminal unit 21, an output terminal unit 22, a power storage unit 30, a switch unit 40, and a voltage detection unit 50.
  • the conductive member 4 that is electrically connected to the electric circuit 2 to be detected is electrically connected to the input terminal portion 21.
  • the input terminal unit 21 includes a pair of input terminals 21a and 21b.
  • the input terminal 21a is electrically connected to the DC output terminal on the positive side of the full-wave rectifiers 11 and 12 via the solenoid coil 5a.
  • the input terminal 21 b is electrically connected to the DC output terminal on the negative side of the full-wave rectifiers 11 and 12.
  • the T-phase conductive member 4T is electrically connected to one AC input terminal
  • the S-phase conductive member 4S is electrically connected to the other AC input terminal. Connected.
  • the R-phase conductive member 4R is electrically connected to one AC input terminal
  • the N-phase conductive member 4N is electrically connected to the other AC input terminal. It is connected. That is, the power supply circuit unit 20 generates a power supply voltage for the abnormality detection unit 60 or the like from either an AC voltage of about 220 V between the R phase and the T phase and an AC voltage of about 220 V between the S phase and the N phase.
  • the input terminals 21a and 21b may be components (terminals) for connecting electric wires or the like, but may be, for example, leads of electronic components or part of a conductor formed as wiring on a circuit board.
  • R-phase conductive member 4R the S-phase conductive member 4S, the T-phase conductive member 4T, and the N-phase conductive member 4N connected to the AC input terminals of the full-wave rectifiers 11 and 12.
  • a protective element or the like may be connected.
  • the power storage unit 30 is, for example, a capacitor and is charged by a DC voltage input from the electric circuit 2 via the input terminals 21a and 21b.
  • the abnormality detection unit 60 is electrically connected to the output terminal unit 22.
  • the output terminal unit 22 includes a pair of output terminals 22a and 22b.
  • the abnormality detection unit 60 is electrically connected between the output terminal 22a and the output terminal 22b.
  • the power storage unit 30 is electrically connected between the output terminal 22a and the output terminal 22b, and a voltage (charge voltage) charged in the power storage unit 30 is output to the abnormality detection unit 60 as the power supply voltage V1.
  • the A Zener diode 33 for overvoltage protection is electrically connected between the output terminal 22a and the output terminal 22b.
  • the switch unit 40 switches the state of the power storage unit 30 between a charging state in which a charging current flows from the electric circuit 2 to be detected to the power storage unit 30 and a charging stop state in which the charging current does not flow through the power storage unit 30.
  • the switch part 40 is controlled by the voltage detection part 50 to either a charge state or a charge stop state.
  • the voltage detection unit 50 that is a control unit controls the switch unit 40 to either the charging state or the charging stop state based on the power supply voltage V ⁇ b> 1 of the power storage unit 30. That is, the voltage detection unit 50 also functions as a control unit that controls the switch unit 40 according to the detection result of the voltage detection unit 50, but the voltage detection unit 50 and the control unit are configured by separate circuits. May be.
  • the switch unit 40 of this embodiment includes a first switching element 41 and a second switching element 42.
  • the first switching element 41 and the power storage unit 30 are electrically connected in series between the input terminal 21a and the input terminal 21b.
  • a resistor 31 as a first impedance element and a second switching element 42 are electrically connected in series between the input terminal 21a and the input terminal 21b.
  • each of the first switching element 41 and the second switching element 42 is an N-channel enhancement type MOSFET (Metal-Oxide-Semiconductor-Field-Effect-Transistor).
  • the drain electrode of the first switching element 41 is electrically connected to the input terminal 21a.
  • the power storage unit 30 is electrically connected between the source electrode of the first switching element 41 and the input terminal 21b.
  • a resistor 31 is electrically connected between the input terminal 21 a and the drain electrode of the second switching element 42.
  • the source electrode of the second switching element 42 is electrically connected to the input terminal 21b.
  • the gate electrode of the first switching element 41 is electrically connected to the connection point between the resistor 31 and the second switching element 42.
  • the gate electrode of the second switching element 42 is electrically connected to the output terminal of the voltage detection unit 50.
  • a capacitor 32 for preventing noise is electrically connected between the input terminal 21a and the input terminal 21b.
  • the voltage detection unit 50 detects the voltage (that is, the power supply voltage of the abnormality detection unit 60) V1 charged in the power storage unit 30.
  • the switch unit 40 of this embodiment is controlled according to the detection result of the voltage detection unit 50. That is, the switch unit 40 changes the state of the power storage unit 30 between the charge state and the charge stop according to the level of the power supply voltage V1 detected by the voltage detection unit 50 and a predetermined reference voltage (charge start voltage and charge stop voltage). It is controlled to switch to any of the states.
  • the charge stop voltage is set to a voltage higher than the charge start voltage. Both the voltage value of the charge stop voltage and the charge start voltage are voltage values at which the abnormality detection unit 60 can operate. In this embodiment, the charge stop voltage is set to about 5.3 V, and the charge start voltage is about 4.6 V. Is set to
  • the voltage detection unit 50 applies a voltage higher than the threshold voltage to the gate electrode of the second switching element 42, turns on the second switching element 42, and turns on the first switching element 41.
  • the power storage unit 30 is set in a charge stop state by turning off.
  • the voltage detection unit 50 turns off the second switching element 42 and turns on the first switching element 41 to put the power storage unit 30 in a charged state.
  • the term “exceeds” includes the case where one of the two values exceeds the other.
  • “exceeding” here may be “more than”. That is, whether or not to include the case where the two values are equal can be arbitrarily changed depending on the setting of the reference voltage or the like, so there is no technical difference between “exceeding” and “exceeding”. Similarly, “less than” may be “less than”.
  • the voltage detection unit 50 also includes a power supply voltage V1 (charge start voltage) when the second switching element 42 is turned on from off and a power supply voltage V1 (charge stop when the second switching element 42 is turned off from on. Hysteresis is provided between the voltage and the voltage. That is, a predetermined voltage difference is provided between the reference voltage when the second switching element 42 is turned on from off and the reference voltage when the second switching element 42 is turned on from off. Is stable.
  • the charge stop voltage is set to a voltage higher than the charge start voltage, but the charge stop voltage and the charge start voltage may be set to the same voltage.
  • the voltage detection unit 50 is a hysteresis comparator circuit using an operational amplifier, for example, and the operational amplifier operates with the power supply voltage V1 of the power storage unit 30.
  • the voltage detection unit 50 starts operating. From the point in time when power is supplied to the switch 1, the voltage detection unit 50 starts operating. This time is shorter than that of a microcomputer that requires processing such as initialization.
  • the abnormality detection unit 60 includes a signal processing unit 61 configured by an integrated circuit, a current transformer 62 that is a zero-phase current transformer, a resistor 63, a diode circuit 64, and a low-pass filter 65.
  • the current transformer 62 includes a core 62a and an output winding 62b provided on the core 62a.
  • the core 62a is formed in an annular shape from a ferromagnetic material such as ferrite.
  • Conductive members 4R, 4S, 4T, and 4N electrically connected to the four electric paths 2R, 2S, 2T, and 2N are inserted into the core 62a. If any of the four electric paths 2 is grounded, an unbalance occurs between the currents flowing through the conductive members 4R, 4S, 4T, and 4N penetrating the core 62a, and a current flows through the output winding 62b.
  • the resistor 63 is electrically connected between both ends of the output winding 62b of the current transformer 62. Between both ends of the resistor 63, an output voltage V2 having a voltage value proportional to the magnitude of the current flowing through the output winding 62b is generated.
  • the diode circuit 64 includes two diodes connected in parallel with the resistor 63.
  • the two diodes included in the diode circuit 64 are connected in opposite directions.
  • the two diodes of the diode circuit 64 flow current only in one direction from the anode to the cathode only when the voltage is equal to or higher than a predetermined forward voltage (slice voltage, for example, 1 V). Therefore, when the output voltage V2 of the current transformer 62 is lower than the forward voltage of the diode, such as normal leakage, the diode circuit 64 does not pass current.
  • the low pass filter 65 is composed of a resistor and a capacitor.
  • the voltage across the resistor 63 (the output voltage of the current transformer 62) V2 is input to the signal processing unit 61 via the low-pass filter 65.
  • the low-pass filter 65 passes a signal component below a predetermined cutoff frequency and attenuates a signal component (noise component) having a frequency higher than the cutoff frequency. Therefore, the noise component input to the signal processing unit 61 by the low-pass filter 65. Is suppressed.
  • the signal processing unit 61 controls the thyristor 70 based on the output voltage V2 of the current transformer 62.
  • the solenoid coil 5a, the diode 71, and the thyristor 70 are electrically connected in series.
  • a snubber circuit 72 composed of a resistor and a capacitor is connected between both ends of the thyristor 70.
  • the signal processing unit 61 determines that the leakage current is not flowing and turns off the thyristor 70. If the thyristor 70 is off, the current flowing through the solenoid coil 5a is smaller than the current value required to turn the contact 5b from on to off, and the contact 5b is turned on. Therefore, AC power is supplied from the AC power supply 3 to the load side via the switch 1.
  • the signal processing unit 61 determines that a leakage current has flowed and turns on the thyristor 70.
  • the thyristor 70 is turned on and the current flowing through the solenoid coil 5a becomes larger than the current value required to turn the contact 5b from on to off, the iron core is driven by the electromagnetic force of the solenoid coil 5a, and the contact 5b is driven by the iron core.
  • the opening / closing mechanism is driven. As a result, the contact 5b is turned off, and the power supply from the AC power supply 3 to the load is interrupted.
  • the conductive member 13 is inserted into the core 62a of the current transformer 62 in order to generate a pseudo unbalanced state.
  • One end of the conductive member 13 is electrically connected to the N-phase conductive member 4N.
  • the other end of the conductive member 13 is electrically connected to the R-phase conductive member 4 ⁇ / b> R via an operation check switch 14 and a resistor 15.
  • the voltage of the input terminal 21a of the power supply circuit unit 20 increases due to the pulsating voltage generated between the DC output terminals of the full-wave rectifiers 11 and 12, and the voltage level of the gate electrode of the first switching element 41 exceeds the threshold voltage.
  • the first switching element 41 is turned on.
  • a charging current flows through the power storage unit 30 and the voltage across the power storage unit 30 (power supply voltage V1) increases.
  • the voltage across the power storage unit 30 (power supply voltage V1) is output to the voltage detection unit 50 and the abnormality detection unit 60.
  • the abnormality detection unit 60 starts operating.
  • the voltage detection unit 50 starts operation, and the voltage value of the power supply voltage V1 of the power storage unit 30 and a predetermined value The level is compared with the reference voltage (charge stop voltage and charge start voltage).
  • voltage detection unit 50 turns off second switching element 42 and turns on first switching element 41 to charge power storage unit 30 with the state of power storage unit 30.
  • the charging state is such that a current flows.
  • the voltage (power supply voltage V1) at both ends of the power storage unit 30 gradually increases.
  • the voltage detection unit 50 When the voltage value of the power supply voltage V1 exceeds the charge stop voltage, the voltage detection unit 50 outputs a control signal having a voltage value higher than the threshold voltage to the gate electrode of the second switching element 42, turn on.
  • the second switching element 42 When the second switching element 42 is turned on, the first switching element 41 is turned off, and a charging stop state in which a charging current does not flow to the power storage unit 30 is entered.
  • the power storage unit 30 is discharged and operating power is supplied to the abnormality detection unit 60 in a charging stop state in which the charging current does not flow to the power storage unit 30, the voltage (power supply voltage V1) across the power storage unit 30 gradually increases. descend.
  • the voltage detection unit 50 turns off the second switching element 42.
  • the first switching element 41 is turned on, and the state of the power storage unit 30 is in the charged state. In the charged state, a charging current flows through the power storage unit 30, and the power supply voltage V1 of the power storage unit 30 gradually increases.
  • the voltage (power supply voltage V1) charged in the power storage unit 30 is controlled between the charge start voltage and the charge stop voltage, and the abnormality detection unit 60 can operate.
  • a power supply voltage V1 is supplied to the abnormality detection unit 60.
  • the switch unit 40 is controlled to be in either the charged state or the charging stopped state based on the power supply voltage V1 of the power storage unit 30 detected by the voltage detecting unit 50, thereby detecting an abnormality.
  • the power supply voltage V1 at which the unit 60 can operate is supplied to the abnormality detection unit 60. Therefore, compared to a case where the power supply circuit unit is configured by a circuit that steps down the input voltage with a resistor, power loss is reduced and heat generation of the power supply circuit unit 20 can be suppressed.
  • the switch 1 is also required to be downsized. However, when the switch 1 is downsized, the cross-sectional area of the conductive member 4 becomes small, so that the internal temperature of the switch 1 can rise due to the temperature rise of the conductive member 4. There is sex. In the switch 1 provided with the power supply circuit unit 20 according to the present embodiment, since the heat generation of the power supply circuit unit 20 is suppressed, an increase in the internal temperature of the switch 1 is suppressed and the switch 1 is downsized. Can do.
  • the switch 1 has an overcurrent protection function
  • a bimetal is connected in the middle of the conductive member 4.
  • a bimetal curves by the Joule heat which generate
  • the switch 1 having an overcurrent protection function when the internal temperature of the switch 1 rises due to heat generated by the power supply circuit unit 20, the current value when the bimetal moves the switch mechanism to turn off the contact 5b may vary. is there.
  • the power supply circuit unit is a circuit that steps down the input voltage with a resistor
  • the current flowing through the resistor may be reduced, and a sufficient output may not be obtained.
  • a desired output can be obtained by charging the power storage unit 30 even when the input voltage is low.
  • the switching period of the first switching element 41 and the second switching element 42 is about several tens of Hz, and the switching frequency is lower than that of a general switching power supply circuit, so that loss due to switching can be reduced.
  • the abnormality detection unit 60 detects whether or not a leakage state in which a leakage current flows in the electric circuit 2 has occurred.
  • the output voltage V2 of the current transformer 62 is lower than the threshold voltage, so the signal processing unit 61 turns off the thyristor 70.
  • the contact 5b since the current value of the current flowing through the solenoid coil 5a is smaller than the current value required to turn the contact 5b from on to off, the contact 5b is turned on, and the switch 1 supplies the AC power to the load. The supply is not shut off.
  • the switch 1 of this embodiment turns off the contact 5b when the abnormality detection unit 60 detects that there is an abnormality, the power supply to the load can be cut off.
  • a resistor 34 as a second impedance element may be electrically connected between the first switching element 41 and the power storage unit 30. Since the resistor 34 is electrically connected between the first switching element 41 and the power storage unit 30, the charging current flowing through the power storage unit 30 is limited by the resistor 34. Therefore, when the first switching element 41 is switched from off to on, it is possible to suppress a sudden increase in the current flowing through the power storage unit 30.
  • the second impedance element is the resistor 34, but it may be a circuit component (eg, a thermistor) having a predetermined impedance.
  • the low-pass filter 51 is electrically connected between the output terminal of the voltage detector 50 and the control terminal (gate electrode) of the second switching element 42. Also good.
  • the low-pass filter 51 can reduce a noise component flowing out from the voltage detection unit 50 to the input terminal unit 21 via the second switching element 42.
  • the low-pass filter 51 shown in FIG. 2 is an RC filter circuit composed of a resistor and a capacitor. However, other circuit configurations may be used as long as a predetermined cut-off frequency can be obtained.
  • the switch unit 40 may be configured by one switching element 43 as shown in FIG.
  • the switching element 43 is an N-channel enhancement type MOSFET.
  • the drain electrode of the switching element 43 is electrically connected to the input terminal 21a.
  • the power storage unit 30 is electrically connected between the source electrode of the switching element 43 and the input terminal 21b.
  • a resistor 31 is electrically connected between the drain electrode and the gate electrode of the switching element 43.
  • the gate electrode of the switching element 43 is electrically connected to the output terminal of the voltage detection unit 50.
  • the output of the voltage detection unit 50 is, for example, an open collector output. If the voltage value of the power supply voltage V1 is equal to or lower than the charge stop voltage, the output terminal of the voltage detection unit 50 is in an open state.
  • the output terminal of the voltage detection unit 50 is in an open state. Therefore, if the voltage value of the gate electrode of the switching element 43 becomes a voltage value higher than the threshold voltage. The switching element 43 is turned on. Thereby, the switch unit 40 is controlled so as to put the power storage unit 30 in a charged state, that is, the control unit (voltage detection unit 50) controls the switch unit 40 so as to put the power storage unit 30 in a charged state.
  • the power supply voltage V1 of the unit 30 gradually increases.
  • the voltage (power supply voltage V1) charged in the power storage unit 30 is controlled between the charge start voltage and the charge stop voltage, and the abnormality detection unit 60 can operate.
  • a power supply voltage V1 is supplied to the abnormality detection unit 60.
  • each of the first switching element 41 and the second switching element 42 is a MOSFET, but may be a semiconductor switching element such as a bipolar transistor.
  • the first impedance element connected in series with the second switching element 42 is the resistor 31, but may be a circuit component (for example, a thermistor) having a predetermined impedance.
  • the abnormality detection unit 60 detects a state in which a leakage current flows in the electric circuit 2, but the detection target of the abnormality detection unit 60 is not limited to the electric leakage in the electric circuit 2.
  • the abnormality detection unit 60 may detect an overvoltage generated due to a phase failure of the neutral wire as an abnormality in the electric circuit 2. If the neutral wire is missing, excessive voltage between R phase and N phase, between S phase and N phase, or between T phase and N phase due to imbalance of the load connected to R phase, S phase, and T phase. May occur.
  • the abnormality detection unit 60 monitors the voltage between the R phase and the N phase, between the S phase and the N phase, and between the T phase and the N phase, and turns on the thyristor 70 when the voltage of each phase exceeds a predetermined upper limit value. Turn off 5b. Thereby, the abnormality detection unit 60 can detect an overvoltage state in which the voltage of the electric circuit 2 to be detected exceeds a predetermined upper limit value as an abnormality of the electric circuit 2.
  • the abnormality detection unit 60 may detect a low voltage state in which the voltage of the electric circuit 2 to be detected is lower than a predetermined lower limit value as an abnormality of the electric circuit 2.
  • the AC voltage supplied from the AC power supply 3 may fluctuate, and the operation of the load becomes unstable when the AC voltage supplied from the AC power supply 3 drops below the voltage necessary for the load to operate. there is a possibility.
  • the abnormality detection unit 60 monitors the voltage between the R phase and the N phase, between the S phase and the N phase, and between the T phase and the N phase, and turns off the thyristor 70 when the voltage of each phase falls below a predetermined lower limit value.
  • the contact 5b may be turned off.
  • the abnormality detection part 60 can detect the low voltage state in which the voltage of the electric circuit 2 to be detected is lower than a predetermined lower limit as an abnormality of the electric circuit 2.
  • the electric circuit abnormality detection device (10) includes an abnormality detection unit (60) that detects whether there is an abnormality in the electric circuit (2) to be detected, and an abnormality detection unit ( 60) and a power supply circuit section (20) for outputting a power supply voltage.
  • the power supply circuit unit (20) includes an input terminal unit (21), a power storage unit (30), an output terminal unit (22), a switch unit (40), a voltage detection unit (50), and a control unit (50).
  • the electric circuit 2 to be detected is electrically connected to the input terminal portion (21).
  • the power storage unit (30) is charged by a DC voltage input to the input terminal unit (21).
  • the abnormality detection unit (60) is electrically connected to the output terminal unit (22).
  • the output terminal unit (22) is a terminal unit for outputting the voltage charged in the power storage unit (30) to the abnormality detection unit (60) as the power supply voltage (V1).
  • the switch unit (40) changes the state of the power storage unit (30) between a charge state in which a charging current flows from the electric circuit (2) to be detected to the power storage unit (30) via the input terminal unit (21) and the power storage unit (30). ) Is switched to one of the charge stop states where no charge current flows.
  • the voltage detector (50) detects the power supply voltage (V1) output from the power storage unit (30) to the abnormality detector (60).
  • the control unit (50) controls the switch unit (40) according to the detection result of the voltage detection unit (50).
  • the switch unit (40) switches the state of the power storage unit (30) to either the charged state or the charge stop state according to the detection result of the voltage detection unit (50), so that the power storage unit (30 ) Is charging. Therefore, the electric circuit abnormality detection device (10) can reduce the power loss as compared with the case where the input voltage is stepped down by the resistor, and can suppress the temperature rise of the power supply circuit unit (20).
  • the switch unit (40) is controlled so that the state of the power storage unit (30) is set to the charge stop state.
  • the state of the power storage unit (30) is controlled to the charge stop state, so the power supply voltage (V1) of the power storage unit (30) is equal to or lower than the charge stop voltage. Can be controlled.
  • the switch unit (40) includes the first switching element (41) and the second switching element (42).
  • the first switching element (41) is electrically connected in series with the power storage unit (30) between the input terminal parts (21), and the second switching element (42) controls the first switching element (41). Electrically connected to the terminal.
  • the controller (50) turns off the other of the first switching element (41) and the second switching element (42).
  • the switch unit (40) is controlled.
  • control unit (50) controls the second switching element (42), thereby controlling the first switching element (41) electrically connected directly to the power storage unit (30).
  • the state of 30) can be switched to either the charged state or the charged stop state.
  • the power storage unit (30) and the first switching element (41) are electrically connected in series between the input terminal unit (21). Has been.
  • the control unit (50) switches the switch unit (40) so that the second switching element (42) is turned off. Control.
  • the second switching element (42) is turned off and the first switching element (41) is turned on, so that the state of the power storage unit (30) Can be charged.
  • the first impedance element (31) and the second switching element (42) are electrically connected in series between the input terminal portions (21). Connected to.
  • a control terminal (gate electrode) of the first switching element (41) is electrically connected to a connection point between the first impedance element (31) and the second switching element (42).
  • the power storage unit (30) when the power supply voltage (V1) exceeds the charge stop voltage, the power storage unit (30) is brought into a charge stop state, and when the power supply voltage (V1) becomes equal to or lower than the charge start voltage, the power storage unit (30) is put into a charge state. be able to.
  • the charge stop state since the current flows to the second switching element (42) via the first impedance element (31), the current flowing to the second switching element (42) is reduced by the first impedance element (31). Can do. Therefore, power consumption can be reduced and temperature rise in the power supply circuit section (20) can be suppressed.
  • the power supply circuit unit (20) includes the first switching element (41) and the power storage unit (30). A second impedance element (34) electrically connected therebetween is further provided.
  • the voltage detection unit (50) also functions as a control unit.
  • a voltage detection part (50) outputs the control signal which controls a 2nd switching element (42) according to the detection result of a power supply voltage (V1).
  • the power supply circuit unit (20) may further include a low-pass filter (51) electrically connected between the voltage detection unit (50) and the control terminal of the second switching element (42).
  • the noise component flowing out from the voltage detection unit 50 to the input terminal unit (21) via the second switching element (42) can be reduced by the low-pass filter (51).
  • an abnormality detected by the abnormality detection unit (60) is detected as a leakage current in the electric circuit (2) to be detected. At least one of a flowing state, an overvoltage state, and an undervoltage state.
  • the overvoltage state is a state in which the voltage of the electric circuit (2) to be detected exceeds the upper limit value
  • the low voltage state is a state in which the voltage of the electric circuit 2 to be detected is lower than the lower limit value.
  • the abnormality detection unit (60) can detect at least one of a state in which a leakage current flows in the electric circuit (2) to be detected, an overvoltage state, and a constant voltage state.
  • the switch (1) according to the ninth aspect includes an electric circuit abnormality detecting device (10) according to any one of the first to eighth aspects, and a power switch (10) electrically connected to the electric circuit (2) to be detected. 5b).
  • the power switch (5b) is controlled by the electric circuit abnormality detection device (10) based on the detection result of the abnormality detection unit (60).
  • the switch (1) which suppressed the heat_generation

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Breakers (AREA)
  • Keying Circuit Devices (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention vise à réduire la génération de chaleur d'une section de circuit de source d'alimentation. La section de circuit de source d'alimentation (20) comprend une unité de stockage d'énergie (30), des unités de commutation (40), une unité de détection de tension (50) et une unité de commande (50). L'unité de stockage d'énergie (30) est chargée au moyen d'une tension continue entrée dans une unité de borne d'entrée (21) à partir d'un trajet électrique où une détection est réalisée par une section de détection d'anomalie (60). La tension chargée dans l'unité de stockage d'énergie (30) est délivrée en sortie en tant que tension de source d'alimentation (V1) à la section de détection d'anomalie (60). Les unités de commutation (40) commutent l'état de l'unité de stockage d'énergie (30) entre un état de charge et un état d'arrêt de charge. L'unité de détection de tension (50) détecte la tension de source d'alimentation (V1). L'unité de commande (50) commande les unités de commutation (40) en fonction du résultat de détection provenant de l'unité de détection de tension (50).
PCT/JP2017/044106 2016-12-20 2017-12-08 Dispositif de détection d'anomalie de trajet électrique et commutateur équipé d'un tel dispositif de détection WO2018116860A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201780078906.7A CN110088871B (zh) 2016-12-20 2017-12-08 电气路径故障检测器和包括该故障检测器的断路器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-247198 2016-12-20
JP2016247198A JP6839813B2 (ja) 2016-12-20 2016-12-20 電路異常検出装置、及びそれを備える開閉器

Publications (1)

Publication Number Publication Date
WO2018116860A1 true WO2018116860A1 (fr) 2018-06-28

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PCT/JP2017/044106 WO2018116860A1 (fr) 2016-12-20 2017-12-08 Dispositif de détection d'anomalie de trajet électrique et commutateur équipé d'un tel dispositif de détection

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JP (1) JP6839813B2 (fr)
CN (1) CN110088871B (fr)
WO (1) WO2018116860A1 (fr)

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CN112970159A (zh) * 2018-11-14 2021-06-15 三菱电机株式会社 电压跳闸装置及断路器
CN113725044A (zh) * 2021-07-30 2021-11-30 湖南华润电力鲤鱼江有限公司 一种低压电气开关
TWI752500B (zh) * 2019-05-24 2022-01-11 日商三菱電機股份有限公司 斷路器

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EP4411769A1 (fr) * 2021-09-30 2024-08-07 Panasonic Intellectual Property Management Co., Ltd. Dispositif de coupure et dispositif d'entraînement

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JP2000316231A (ja) * 1999-04-28 2000-11-14 Hitachi Ltd 漏電警報機能付回路遮断器及び漏電遮断器
JP2004022231A (ja) * 2002-06-13 2004-01-22 Toshiba Corp 転流コンデンサの充電装置
JP2007042638A (ja) * 2005-08-02 2007-02-15 Schneider Electric Industries Sas 昇圧手段を含む電源回路を備えた電子引外し装置およびそのような引外し装置を含む回路遮断器
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112970159A (zh) * 2018-11-14 2021-06-15 三菱电机株式会社 电压跳闸装置及断路器
CN112970159B (zh) * 2018-11-14 2023-10-20 三菱电机株式会社 电压跳闸装置及断路器
TWI752500B (zh) * 2019-05-24 2022-01-11 日商三菱電機股份有限公司 斷路器
CN113725044A (zh) * 2021-07-30 2021-11-30 湖南华润电力鲤鱼江有限公司 一种低压电气开关

Also Published As

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CN110088871A (zh) 2019-08-02
JP6839813B2 (ja) 2021-03-10
JP2018101549A (ja) 2018-06-28
CN110088871B (zh) 2021-01-19

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