CN106058802B - Anti-failure circuit chip and anti-failure anti-leakage protector - Google Patents

Anti-failure circuit chip and anti-failure anti-leakage protector Download PDF

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CN106058802B
CN106058802B CN201610508436.0A CN201610508436A CN106058802B CN 106058802 B CN106058802 B CN 106058802B CN 201610508436 A CN201610508436 A CN 201610508436A CN 106058802 B CN106058802 B CN 106058802B
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circuit
diode
resistor
rah
power supply
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CN106058802A (en
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刘圣平
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    • 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
    • H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/325—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors involving voltage comparison
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/042—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors

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  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The invention relates to an anti-runaway circuit chip and an anti-overheating anti-runaway anti-creeping protector, which adopt the technical method that: the method comprises the following steps that an out-of-control prevention circuit chip is used as a core device, a signal input end and a safety control input end or an external base setting end of the chip are connected with a secondary coil of a zero sequence transformer, two output ends of the chip are connected with a driving circuit or an execution circuit, and then an alternating current power supply is controlled; triggering a core circuit to latch and seal by using a leakage signal, and cutting off an alternating current power supply to realize electric shock protection safety; monitoring abnormal faults such as coil breakage or short circuit and open circuit or short circuit at a certain position of a circuit by using a bottom falling protector in a core circuit, and preventing loss of control and failure; the safety control input end or the external base setting end of the core circuit is connected with the thermistor NTC to monitor the contact temperature of the connecting terminal, and overheat protection control is performed. Therefore, the invention can prevent overheating, failure and electric leakage when the automobile breaks down or is overheated very much, thereby ensuring the personal safety.

Description

Anti-failure circuit chip and anti-failure anti-leakage protector
Technical Field
The invention relates to a core control circuit and an anti-leakage or electric shock protector, in particular to an anti-leakage control circuit chip and an anti-failure and anti-leakage protector or an anti-overheating and anti-failure and anti-leakage protector.
Background
In order to verify the novelty of the invention, designers refer to a large amount of relevant technical data (professional books and newspapers) and retrieve relevant patent documents, and do not find the loss control preventing circuit chip and the loss effect and leakage current preventing protector.
The existing earth leakage protector for hanging net operation has a great variety, and can basically protect and control the electric leakage of an alternating current electric appliance or the electric shock of a human body in normal time, but generally has two potential fatal defects: firstly, if the earth leakage protector itself has abnormal fault, its protection function will be invalid to form out-of-control bounce rejection, and the ac power supply can not be cut off in time when the earth leakage or electric shock occurs, and the personal safety of the electric shock person can not be protected! Secondly, if the contact resistance of the wiring terminals or the pin jacks on the alternating current power supply side and the alternating current load side of the leakage protector is too large, the leakage protector generates heat greatly when passing large current, and the temperature rises too fast and too high, so that fire disasters occur. However, this also corresponds to the current technical standards in the country of the industry and to the technical standards that are in international traffic. In reality, any electromechanical product is inevitable to have abnormal faults, such as: the secondary coil and the trip coil of the zero sequence current transformer H in the leakage protector are most prone to break or short circuit faults, or the out-of-control failure caused by open circuit or short circuit faults at a certain position of a circuit is common, at the moment, when a leakage current signal occurs, the control circuit cannot be triggered to act to form rejection, power supply cannot be cut off in time, and the leakage protection function is lost; as for the improper use and maintenance of the installation wiring, the heating is too fast, the temperature rise is too high, and fire accidents are caused, so that the installation wiring is easy to happen. This is a technical problem that has been neglected in the field for a long time. Therefore, the existing earth leakage protector only has to be provided with a test button to check whether the safety protection function is effective or not, and warn a user to check the efficacy regularly. However, in practical use, users often neglect or forget or are inconvenient to perform validity check, which allows a large number of false safety earth leakage protectors with failed functions to be hidden in the power grid for operation, and thus the potential danger of human death! Instead, one also mistakenly believes it is safe and effective! Therefore, the current earth leakage protector is easy to have electric shock casualty accidents when being abnormally disabled! Therefore, the technical problem is solved firstly, and the technical standard is promoted later, which is not only an urgent need for public electricity utilization safety, but also a development opportunity of the electrical appliance industry.
Disclosure of Invention
The invention mainly solves the technical problems that the existing popular leakage protector and the special core control circuit thereof often lose control and lose efficacy due to abnormal faults of the leakage protector and cannot cut off a power supply in time or cause fire disasters due to overheating, so that potential safety hazards exist and personal safety is seriously threatened; an anti-leakage protector and its anti-leakage control circuit chip are provided, which can timely and reliably carry out safety protection control when the protector itself has abnormal fault or is overheated very much, and can forcibly cut off the AC power supply, prevent failure and electric shock, or prevent overheating and failure and electric shock.
The idea and method for solving the technical problems are as follows: the method comprises the following steps that an out-of-control prevention circuit chip is used as a core circuit or a core device, and a signal input end and a safety control input end or an external base setting end of the out-of-control prevention circuit chip are connected with two voltage division points of a secondary coil of a zero sequence current transformer on a series resistor; two output ends with opposite phases are connected with a control drive circuit or an execution circuit, and the execution circuit controls the alternating current power supply. Maintaining the core circuit in a normally-on state by using an input direct current potential difference, and controlling the driving execution circuit to switch on a load alternating current power supply; triggering a core circuit to be in a latching closed state by the leakage or electric shock signal voltage induced by a secondary coil of the zero-sequence current transformer, and forcibly driving an execution circuit to cut off a load alternating current power supply to realize leakage protection control; monitoring abnormal faults such as disconnection of a secondary coil of the zero sequence current transformer and an open circuit or a short circuit at a certain position of a circuit by using a bottom falling protector in a core circuit, performing safety protection control, and forcing a driving circuit or an execution circuit to cut off a load alternating current power supply; and the safety control input end or the external base setting end of the core circuit is connected with the negative temperature coefficient thermistor NTC to monitor whether the contact temperature of the connecting terminal is too high or not, and overheat protection control is performed.
According to the technical thought and method, the technical measures or technical scheme adopted by the invention are as follows: the circuit structure characteristics adopted by an anti-loss control circuit chip RAH as a core circuit or a core device; the circuit comprises a first unit circuit, a second unit circuit, a reference positioning circuit (5), an anti-reverse constant voltage circuit (9) and a bottom-supporting high-locking circuit (8), wherein the reference positioning circuit and the anti-reverse constant voltage circuit are shared by the first unit circuit and the second unit circuit, the first unit circuit comprises a first bottom-falling protector (1) and a first contact latch (2), and the second unit circuit comprises a second contact latch (6) and a second bottom-falling protector (7); a signal input terminal V of the first unit circuiti1A monitoring input end of the first falling bottom protector (1) is connected with a trigger input end of the first contact latch (2), and a driving output end V of the first unit circuito1The output end of the first falling bottom protector (1) and the limit input end V of the first falling bottom protector (1) are connectedw1The output end of the first touch-based latch (2) is connected; a signal input terminal V of the second unit circuiti2A trigger input end of the second touch latch (6) is connected with a monitoring input end of the second falling bottom protector (7), and a driving output end V of the second unit circuito2The output end of the second falling bottom protector (7) and the limit input end V of the second falling bottom protector (7) are connectedw2The output end of the second touch-based latch (6) is connected; a security control input end V shared by the two unit circuitskThe input end of the bottom-supporting high-lock circuit (8) is connected, and two output ends of the bottom-supporting high-lock circuit (8) are respectively connected with the limiting input end V of the first bottom-falling protector (1)w1And a limit input end V of a second falling bottom protector (7)w2(ii) a An external base setting end V shared by the two unit circuitsmThe external input end of the reference positioning circuit (5) is connected, and the internal base setting end V of the reference positioning circuit (5)fTwo base position setting terminals connecting the first base latch (2) and the second base latch (6); the output voltage V of the anti-reverse constant voltage circuit (9) shared by the two unit circuits+0Three power input ends connected with the first unit circuit, the second unit circuit and the reference positioning circuit (5),power supply input end V of anti-reverse constant voltage circuit (9)+1Voltage V of external DC power supply+1The power supply ground end GND of the anti-reverse constant voltage circuit (9) is externally connected with the DC power supply ground end GND; the first falling bottom protector (1) comprises an integrated operational amplifier A11, a voltage stabilizing diode WD11 or a constant current source IR11, the first base latch (2) comprises an integrated operational amplifier A12, resistors R11 and R12, the reference positioning circuit (5) comprises a resistor R31, a voltage stabilizing diode WD31 and a diode D32, the anti-reverse constant voltage circuit (9) comprises a diode D31, the bottom-supporting high-lock circuit (8) comprises diodes D11 and D21, the second base latch (6) comprises an integrated operational amplifier A22, resistors R21 and R22, and the second falling bottom protector (7) comprises an integrated operational amplifier A21, a voltage stabilizing diode 21 or a constant current source IR 21.
As a specific embodiment 1 of the preferred loss control prevention circuit chip RAH, the circuit is characterized in that: a signal input terminal V of the first unit circuiti1The inverting input (-) of the integrated operational amplifier A11, the non-inverting input (+) of the integrated operational amplifier A12 and one end of a resistor R12 are connected, the other end of the resistor R12 is connected with the output of the integrated operational amplifier A12 and the inner end of the resistor R11, the outer end of the resistor R11 and the cathode of the diode D11 are both connected with the anode of the zener diode WD11, the cathode of the zener diode WD11 is connected with the non-inverting input (+) of the integrated operational amplifier A11, and the output of the integrated operational amplifier A11 is the driving output V of the first unit circuito1(ii) a A signal input terminal V of the second unit circuiti2The output end of the integrated operational amplifier A21 is the driving output end V of the second unit circuit, and the output end V of the integrated operational amplifier A21 is connected to the non-inverting input end (+) of the integrated operational amplifier A22 and one end of the resistor R22, the other end of the resistor R22 is connected to the output end of the integrated operational amplifier A22 and the inner end of the resistor R21, the outer end of the resistor R21 and the cathode of the diode D21 are both connected to the anode of the zener diode WD21, the cathode of the zener diode WD21 is connected to the inverting input end (-) of the integrated operational amplifier A21, ando2(ii) a A security control input end V shared by the two unit circuitskThe anodes of the diodes D11 and D21 are connected, and the cathode of the diode D11 is connected with a limit input end Vw1The cathode of the diode D21 is connected with a limit input end Vw2(ii) a The two unit circuits are allWith external base-setting end VmThe cathode of the diode D32 is connected, the anode of the diode D32 is connected with the two inverting input terminals (-) of the integrated operational amplifier A12 and the integrated operational amplifier A22, one end of the resistor R31 and the cathode of the voltage stabilizing diode WD31 to be used as the internal base setting terminal V of the reference positioning circuit (5)fThe anode of the voltage stabilizing diode WD31 is connected with the power supply ground ends GND of the integrated operational amplifiers A11 and A12 and the integrated operational amplifiers A21 and A22 to be used as the power supply ground end GND of the whole anti-loss control circuit chip RAH, and the other end of the resistor R31 is connected with the cathode of the diode D31 and the power supply input ends (V) of the integrated operational amplifiers A11 and A12 and the integrated operational amplifiers A21 and A22+0) The anode of the diode D31 is used as the power input end V of the whole anti-loss control circuit chip RAH+1Voltage V of external DC power supply+1A terminal; according to the circuit characteristics of embodiment 1, the diode D12, the diode D22, and the not gate F2 in fig. 2 and the circuit connections thereof have been eliminated.
As a specific embodiment 2 of the preferred loss control prevention circuit chip RAH, the circuit is characterized in that: on the basis of completely adopting the circuit of the specific embodiment 1 of the anti-lost control circuit chip RAH, a diode D12, a diode D22 and a NOT gate F2 are additionally connected; the anode of the diode D12 is connected with the output end of the integrated operational amplifier A11, and the cathode of the diode D12 is connected with the anode of the voltage-stabilizing diode WD11, the cathode of the diode D11 and the outer end of the resistor R11; the cathode of the diode D22 is connected with the anode of the voltage-stabilizing diode WD21, the cathode of the diode D21 and the outer end of the resistor R21, the anode of the diode D22 is connected with the output end of the NOT gate F2, and the input end of the NOT gate F2 is connected with the output end of the integrated operational amplifier A21.
The first preferred failure-preventing and leakage-preventing protector comprises a zero-sequence current transformer H, a rear-stage driving circuit, an execution circuit and an alternating-current voltage-reducing rectification direct-current stabilized power supply (18), and is characterized in that: the circuit also comprises a core device RAH and a preceding stage detection circuit, and an application circuit of the circuit is shown in figure 3; the zero sequence current transformer H consists of an annular iron core and a primary coil n1、n2And a secondary coil n3The preceding stage detection circuit is composed of a secondary coil n of a zero sequence current transformer H3And a resistance 3R1、3R2、3R3Constitution of the core deviceRAH is an anti-loss control circuit chip RAH shown in figure 1 or figure 2, and the rear-stage drive circuit is composed of a resistor 3R7、3R8And a zener diode 3WD1、3WD2And triode 3TV1、3TV2The execution circuit is composed of a relay 3J and a diode 3D3Forming; two alternating current input ends (L) of the alternating current voltage reduction rectification direct current stabilized power supply (18)1～N1) Two AC lines L connected to an AC load side1、N1The DC voltage V output by the AC step-down rectification DC stabilized power supply (18)+2Higher than DC voltage V+1Primary coil n of the zero sequence current transformer H1、n2Is two AC power lines L penetrating into the annular iron core hole1、N1Secondary coil n of zero sequence current transformer H3Is a coil wound on a toroidal core thereof, the secondary coil n3One end of the input terminal is connected with the safety control input terminal V of the core device RAHkSecondary winding n3Another end of the resistor 3R2、3R3On the series connection point of (3R)3The other end is connected with a signal input end V of a core device RAHi1And Vi2Resistance 3R2The other end is connected with a power ground end GND and a resistor 3R1One end is connected with a direct current voltage V+1Resistance 3R1The other end is connected with the safety control input end V of the core device RAHkA driving output terminal V of the core device RAHo1Connecting resistor 3R7One terminal, resistor 3R7The other end is connected with a voltage stabilizing diode 3WD1Positive, zener diode 3WD1The negative electrode is connected with the triode 3TV1Base, triode 3TV1Emitter connected DC voltage V+2The driving output end V of the core device RAHo2Connecting resistor 3R8One terminal, resistor 3R8The other end is connected with a voltage stabilizing diode 3WD2Negative, zener diode 3WD2Triode 3TV is connected to positive pole2Base, triode 3TV2The emitter is connected with a power ground terminal GND, and the diode 3D in the execution circuit3Negative electrode connected triode 3TV1Collector, diode 3D3Triode 3TV is connected to positive pole2Collector, relay 3J coil both ends are parallelly connected at diode 3D3Two poles of the earth, two pairs of normally open contacts of the relay 3J are connected with an alternating current power supply (L, N) for controlling an alternating current load, QD is a manual starting button, and the QD is connected with an alternating current voltage reduction rectification direct current stabilized voltage power supply (18) and an alternating current power supply (L, N) for the controlled alternating current load after being pressed down. According to the first embodiment of the circuit characteristic of the protector against failure and leakage, the NTC and 3R of the NTC thermistor 3 in FIG. 3 have been eliminated6And its circuit connection.
As a first example of the improved overheat-proof, failure-proof and leakage-proof protector or overheat-proof, failure-proof and leakage-proof protection plug and socket, its application circuit is also shown in fig. 3: on the basis of completely adopting the application circuit of the first failure-preventing and leakage-preventing protector, an overheating protection circuit is added; the overheating protection circuit consists of a negative temperature coefficient thermistor 3NTC and a resistor 3R6The negative temperature coefficient thermistor 3NTC is used for monitoring the working temperature of a wiring terminal or a pin or a jack of an alternating current power supply side and/or an alternating current load side, one end of the negative temperature coefficient thermistor 3NTC is connected with a power supply ground end GND, and the other end of the negative temperature coefficient thermistor 3NTC is connected with a resistor 3R6One terminal, resistor 3R6The other end is connected with an external base setting end V of the core device RAHmAbove.
The second preferred embodiment of the anti-failure and anti-leakage protector comprises a zero sequence current transformer H, an execution circuit and an AC step-down rectification DC stabilized power supply (18), and is characterized in that: the circuit also comprises a core device RAH and a preceding stage detection circuit, and the application circuit of the circuit is shown in figure 4; the zero sequence current transformer H consists of an annular iron core and a primary coil n1、n2And a secondary coil n3The preceding stage detection circuit is composed of a secondary coil n of a zero sequence current transformer H3And a resistance 4R1、4R2、4R3The core device RAH adopts an anti-loss control circuit chip RAH shown in figure 1 or figure 2, and the execution circuit comprises a relay 4J and a diode 4D2、4D3Forming; two alternating current input ends (L) of the alternating current voltage reduction rectification direct current stabilized power supply (18)1～N1) Two AC lines L connected to an AC load side1、N1The DC voltage V output by the AC step-down rectification DC stabilized power supply (18)+2Higher than DC voltage V+1Primary coil n of the zero sequence current transformer H1、n2Is two AC power lines L penetrating into the annular iron core hole1、N1Secondary coil n of zero sequence current transformer H3Is a coil wound on a toroidal core thereof, the secondary coil n3One end of the input terminal is connected with the safety control input terminal V of the core device RAHkSecondary winding n3Another end of the resistor 4R2、4R3On the series connection point of (3), a resistor 4R3The other end is connected with a signal input end V of a core device RAHi1And Vi2Resistance 4R2The other end is connected with a power ground end GND and a resistor 4R1One end is connected with a direct current voltage V+1Resistance 4R1The other end is connected with the safety control input end V of the core device RAHkThe two ends of the relay 4J coil of the executive circuit are connected in parallel with the diode 4D3Bipolar, diode 4D2、4D3After the anodes are connected, the diode 4D2The cathode is connected with the drive output end V of the core device RAHo1Diode 4D3The cathode is connected with the drive output end V of the core device RAHo2Two pairs of normally open contacts of the relay 4J are connected with an alternating current power supply (L, N) for controlling an alternating current load, QD is a manual starting button, and the QD is pressed to connect an alternating current voltage reduction rectification direct current stabilized voltage power supply (18) and an alternating current power supply (L, N) for the controlled alternating current load. According to the second circuit characteristic of the protector against failure and leakage, the NTC and 4R of the NTC thermistor 4 in FIG. 4 have been eliminated6And its circuit connection.
As a second example of the improved overheat-proof, failure-proof and leakage-proof protector or overheat-proof, failure-proof and leakage-proof protection plug and socket, the application circuit is also shown in fig. 4: on the basis of completely adopting the application circuit of the second failure-preventing and leakage-preventing protector, an overheating protection circuit is added; the overheating protection circuit consists of a negative temperature coefficient thermistor 4NTC and a resistor 4R6Is formed of the negative temperature coefficientThe thermistor 4NTC is used for monitoring the working temperature of a wiring terminal or a pin or a jack on the AC power supply side or the AC load side, one end of the negative temperature coefficient thermistor 4NTC is connected with the GND of the power supply ground, and the other end of the negative temperature coefficient thermistor 4NTC is connected with the resistor 4R6One terminal, resistor 4R6The other end is connected with an external base setting end V of the core device RAHmAbove.
The third preferred embodiment of the device for preventing failure and leakage comprises a zero sequence current transformer H, a post-stage driving circuit and an execution circuit, and an ac step-down rectification dc stabilized power supply (18), and is characterized in that: the circuit also comprises a core device RAH, a preceding stage detection circuit and a safety control circuit, and an application circuit of the circuit is shown in figure 5; the zero sequence current transformer H consists of an annular iron core and a primary coil n1、n2And a secondary coil n3The preceding stage detection circuit is composed of a secondary coil n of a zero sequence current transformer H3And a resistor 5R2、5R3The core device RAH adopts an anti-loss control circuit chip RAH shown in figure 1 or figure 2, and the safety control circuit only comprises a resistor 5R6The rear-stage drive circuit is composed of a resistor 5R7、5R8And a zener diode 5WD1、5WD2And triode 5TV1、5TV2The executive circuit is composed of a relay 5J and a diode 5D3Forming; two alternating current input ends (L) of the alternating current voltage reduction rectification direct current stabilized power supply (18)1～N1) Two AC lines L connected to an AC load side1、N1The DC voltage V output by the AC step-down rectification DC stabilized power supply (18)+2Higher than DC voltage V+1Primary coil n of the zero sequence current transformer H1、n2Is two AC power lines L penetrating into the annular iron core hole1、N1Secondary coil n of zero sequence current transformer H3Is a coil wound on a toroidal core thereof, the secondary coil n3One end of which is connected with an external base setting end V of the core device RAHmSecondary winding n3Another end of the resistor 5R2、5R3On the series connection point of (3), a resistor 5R3The other end is connected withSignal input end V connected with core device RAHi1And Vi2Resistance 5R2The other end is connected with a power ground end GND and a resistor 5R6One end is connected with a direct current voltage V+2Resistance 5R6The other end is connected with the safety control input end V of the core device RAHkA driving output terminal V of the core device RAHo1Connecting resistor 5R7One terminal, resistor 5R7The other end is connected with a voltage stabilizing diode 5WD1Positive, zener diode 5WD1The negative electrode is connected with the triode 5TV1Base, triode 5TV1Emitter connected DC voltage V+2The driving output end V of the core device RAHo2Connecting resistor 5R8One terminal, resistor 5R8The other end is connected with a voltage stabilizing diode 5WD2Negative, zener diode 5WD2The anode is connected with a triode 5TV2Base, triode 5TV2The emitter is connected with a power ground terminal GND, and the diode 5D in the execution circuit3Negative electrode connected triode 5TV1Collector, diode 5D3The anode is connected with a triode 5TV2Collector, relay 5J coil both ends are parallelly connected at diode 5D3Two poles of the earth, two pairs of normally open contacts of the relay 5J are connected with an alternating current power supply (L, N) for controlling an alternating current load, QD is a manual starting button, and the QD is connected with an alternating current voltage reduction rectification direct current stabilized voltage power supply (18) and an alternating current power supply (L, N) for the controlled alternating current load after being pressed down. According to the applied circuit characteristics of the third embodiment of the device for preventing the electric leakage and the malfunction, the negative temperature coefficient thermistor 5NTC and its circuit connection shown in FIG. 5 have been eliminated.
As a third example of the improved overheat-proof, failure-proof and leakage-proof protector or overheat-proof, failure-proof and leakage-proof protection plug and socket, the application circuit is also shown in fig. 5: on the basis of completely adopting the application circuit of the third example of the anti-failure and anti-leakage protector, an overheating protection circuit is added; the overheat protection circuit is arranged on the original resistor 5R6The two ends of the thermistor are connected with a negative temperature coefficient thermistor 5NTC in parallel, the negative temperature coefficient thermistor 5NTC is used for monitoring the working temperature of a wiring terminal or a pin or a jack of an alternating current power supply side or an alternating current load side, and the negative temperature coefficient thermistor 5NTC and a resistor 5R6After parallel connection, one end of the parallel connection is connected with a safety control input end V of the core device RAHkThe other end of the parallel connection is connected to a direct current voltage V+2Above.
The circuit working principle of the specific embodiment 1 or embodiment 2 of the preferred anti-loss control circuit chip RAH is as follows:
1. when the circuit is working normally, if the first unit circuit signal input end Vi1Andor second unit circuit signal input terminal Vi2The DC standby potential of the integrated operational amplifiers A12 and A22, i.e. the potentials of the two non-inverting input terminals (+) of the integrated operational amplifiers A12 and A22 (i.e. the potentials of the two trigger input terminals of the two touch-based latches) are slightly lower than the potential of the internal-based setting terminal VfInternal reference limit (stabilized voltage values of a voltage stabilizing diode WD31 and a resistor R31 are basically stabilized in the reference positioning circuit (5), and the internal reference limit can be adjusted by connecting an adjustable resistor in series with a power ground end GND through the cathode of a diode D32) arranged for two inverting input ends (-) of the integrated operational amplifiers A12 and A22, so that the output ends of the integrated operational amplifiers A12 and A22 output low potentials respectively, and the integrated operational amplifiers A12 and A22 are latched in a standby state due to the positive feedback effect of the resistors R12 and R22 to maintain the low potential output respectively; the low potential output by the integrated operational amplifier a12 is boosted by the resistor R11 and transmitted to the positive electrode of the zener diode WD11, and then boosted by the zener diode WD11, so that the potential (+) of the positive input terminal of the integrated operational amplifier a11 is still slightly lower than the potential (-) of the negative input terminal thereof (i.e., the potential V of the monitoring input terminal of the first bottom-drop protector)i1) The integrated operational amplifier a11 outputs a low voltage to the driving output terminal V of the first unit circuito1Pulling an external circuit to conduct work; the low potential output by the integrated operational amplifier a22 is boosted by the resistor R21 and transmitted to the positive electrode of the zener diode WD21, and then boosted by the zener diode WD21, so that the (-) potential of the inverting input terminal of the integrated operational amplifier a21 is still slightly lower than the (+) potential of the non-inverting input terminal thereof (i.e., the potential V of the monitoring input terminal of the second bottom-drop protector)i2) Then the integrated operational amplifier A21 outputs a high voltage to the driving output terminal V of the second unit circuito2Promoting the conduction work of an external circuit; the execution circuit is switched on by the AC power supply. At this time, the diode D12 and the diodes D22 and D22 described in example 2The NOT gates F2 are only respectively opposite to the limit input ends Vw1And a limit input terminal Vw2And the reverse isolation function is realized.
2. When the first unit circuit signal input terminal Vi1Andor second unit circuit signal input terminal Vi2When detecting that the external leakage or electric shock signal voltage or the sensing signal voltage amplitude reaches the trigger set value, the potentials of the two positive phase input ends (+) of the integrated operational amplifiers A12 and A22 (namely the potentials of the two trigger input ends of the two touch latches) are slightly higher than the potential of the internal base set end VfThe internal reference limit set for the two inverting input ends (-) of the integrated operational amplifiers A12 and A22 is provided, then the output ends of the integrated operational amplifiers A12 and A22 output high potentials respectively, and due to the positive feedback effect of the resistors R12 and R22, the integrated operational amplifiers A12 and A22 are triggered and locked in a closed state, and the high potential output is maintained respectively; the high potential output by the integrated operational amplifier A12 is boosted by the resistor R11 and transmitted to the anode of the voltage regulator diode WD11, and then boosted by the voltage regulator diode WD11, so that the potential (+) at the positive input terminal of the integrated operational amplifier A11 is suddenly higher than the potential (-) at the negative input terminal thereof (i.e., the potential V at the monitoring input terminal of the first bottom-drop protector)i1) Then the integrated operational amplifier A11 outputs a high voltage to the driving output terminal V of the first unit circuito1Cutting off the external circuit; the high potential output by the integrated operational amplifier A22 is boosted by the resistor R21 and transmitted to the anode of the voltage regulator diode WD21, and then boosted by the voltage regulator diode WD21, so that the potential (-) at the inverting input terminal of the integrated operational amplifier A21 is suddenly increased to be higher than the potential (+) at the non-inverting input terminal thereof (i.e., the potential V at the monitoring input terminal of the second bottom-drop protectori2) The integrated operational amplifier A21 outputs a low voltage to the driving output terminal V of the second unit circuito2Turning off the external circuit; meanwhile, the execution circuit is forced to cut off the alternating current power supply, and the alternating current load is placed in a safe state. In embodiment 2, the diode D12 is fed back to the potential (+) of the non-inverting input terminal (+) of the integrated operational amplifier a11 through the zener diode WD11, and is triggered to be locked in a closed state; the re-compensated diode D22 and the NOT gate F2 feed back the potential of the inverted input (-) of the integrated operational amplifier A21 to be higher through the voltage stabilizing diode WD21, and trigger locking is also carried out in a closed state. This is achieved byThe high-reliability requirement of safety control is ensured when the electric shock protection device meets a trigger signal.
3. When the signal input end Vi1Or Vi2Secondary coil n for detecting external zero sequence current transformer H3When the circuit or the sensing signal circuit has open circuit, suspension or short circuit to the positive pole of the power supply, the signal input end V is enabledi1Or Vi2The potential is also higher than the inner base setting end VfThe voltage level of the integrated operational amplifiers A12 and A22 is latched in a closed state to maintain high voltage output, so that the integrated operational amplifier A11 outputs high voltage to the driving output terminal Vo1And maintaining the high potential closed state to cut off the external circuit; the integrated operational amplifier A21 outputs low potential to the driving output terminal Vo2And maintaining the low potential closed state to cut off the external circuit; meanwhile, the execution circuit is forced to cut off the alternating current power supply, and the alternating current load is placed in a safe state.
4. When the signal input end Vi1Or Vi2Detected secondary coil n of external zero sequence current transformer H3When the circuit or the sensing signal circuit is in short circuit or ground fault, the signal input end V is enabledi1Or Vi2The potential is extremely low, so that the integrated operational amplifiers A12 and A22 both output low potentials, the integrated operational amplifiers A12 and A22 are latched in a normally-on state due to the positive feedback action of the resistors R12 and R22, the low potentials are respectively maintained to be output at low potentials, the low potentials are raised by the resistor R11 and boosted by the voltage regulator diode WD11, and the potential of a positive phase input end (+) of the integrated operational amplifier A11 is still slightly higher than the potential V of an inverting input end (-) of the integrated operational amplifier A11i1(i.e., the voltage at the monitor input of the first falling bottom prevention device), the integrated operational amplifier A11 outputs a high voltage to the driving output V of the first unit circuito1Cutting off the external circuit; the high voltage output from the integrated operational amplifier A22 is boosted by the resistor R21 and the zener diode WD21, so that the (-) voltage level at the inverting input of the integrated operational amplifier A21 is still slightly higher than the (+) voltage level at the non-inverting input (i.e. the voltage V at the monitor input of the second bottom-falling protector)i2) The integrated operational amplifier A21 outputs a low voltage to the driving output terminal V of the second unit circuito2Make the external circuit cut offStopping; meanwhile, the execution circuit is forced to cut off the alternating current power supply, and the alternating current load is placed in a safe state.
5. When the external base is set to the end VmWhen a high potential impact fault occurs, the circuit system cannot be out of control due to the reverse isolation effect of the diode D32; when the external base is set to the end VmWhen a short-circuit fault to the ground occurs, only the integrated operational amplifiers A12 and A22 are triggered and locked in a closed state to maintain high-potential output respectively, so that the integrated operational amplifier A11 outputs high potential to the driving output end Vo1And maintaining the high potential closed state to cut off the external circuit; the integrated operational amplifier A21 outputs low potential to the driving output terminal Vo2And maintaining the high potential closed state to cut off the external circuit; meanwhile, the execution circuit is forced to cut off the alternating current power supply, and the alternating current load is placed in a safe state.
6. When the safety control input end VkWhen a short-circuit fault to the ground occurs, the circuit system cannot be out of control due to the reverse isolation action of the diode D11 and the diode D21; when the safety control input end VkWhen the high potential surge fault occurs, only the integrated operational amplifier A11 outputs high potential to the driving output end Vo1And maintaining the high potential closed state to cut off the external circuit; the integrated operational amplifier A21 outputs low potential to the driving output terminal Vo2And maintaining the low potential closed state to cut off the external circuit; meanwhile, the execution circuit is forced to cut off the alternating current power supply, and the alternating current load is placed in a safe state.
7. When driving the output terminal Vo1Andor Vo2When short-circuit fault occurs, only the internal integrated operational amplifier A11 and the integrated operational amplifier A21 are kept in a closed state, the external driving circuit is in a cut-off state, the execution circuit is forced to cut off the alternating current power supply, and the circuit system cannot be out of control; when a certain driving output end Vo1Or Vo2When short circuit to ground or power supply anode short circuit fault occurs, the circuit system is not out of control because overcurrent and short circuit protection is provided in the output end of the common integrated operational amplifier and short circuit protection is provided in the output end of the direct current stabilized voltage power supply. Of course, there are also better technical measures for preventing out of controlParticularly integrated operational amplifiers, are difficult to disclose or disclose.
8. When the direct current stabilized voltage power supply has an open circuit or short circuit fault, the execution circuit is only forced to disconnect the alternating current power supply, and the alternating current load is placed in a safe state.
According to the above working principle, the basic working principle of the first unit circuit and the second unit circuit in the loss control prevention circuit chip RAH is substantially the same, and the difference between the first unit circuit and the second unit circuit is as follows: the characteristics of the first falling bottom protector (1) and the second falling bottom protector (7) are complementary, the phases of output levels are opposite, and the safety control of an alternating current load (electrical appliance) can be simply realized by using a series control execution circuit of the first falling bottom protector and the second falling bottom protector.
In the invention, each of the loss-proof and leakage-proof protectors or the overheat and loss-proof and leakage-proof protectors is designed by adopting the loss-proof control circuit chip RAH as a core circuit or a core device, and the working principles of the circuits are also approximately the same, so that only the first example of the overheat and leakage-proof protector is selected as an example, and the working principle of the circuit is briefly described as follows:
1. after the start button QD is manually pressed, the normally open contact of the execution circuit relay maintains the attraction state, the alternating current power supply is continuously connected, and the leakage protector circuit system and the controlled alternating current load thereof are electrified to work. If the controlled AC load works normally and no electric leakage or electric shock occurs, the controlled AC load works normally through the AC power line L1、N1The currents are equal in magnitude and opposite in direction, and the magnetic flux induced in the annular iron core of the zero sequence current transformer H is offset to zero, so that the secondary coil n of the zero sequence current transformer H is3No AC current or voltage is generated at the two ends, at this time, the signal input end V of the anti-loss control circuit chip RAHi1And Vi2The DC standby potential is slightly lower than the safety control input end VkAnd an external base setting terminal VmMaintaining the chip RAH in standby state by DC potential to make the driving output end V of the chip RAH in standby stateo1Output low level, drive output terminal Vo2And outputting high level to control the conduction of the driving circuit, so that the execution circuit relay 3J maintains the attraction state and is continuously connected with the alternating current power supply.
2. If controlled AC loadThe AC power line L is caused to leak or get an electric shock1、N1Produce unbalanced alternating current, and produce induced magnetic flux in the H-ring core of the zero sequence current transformer, so that the secondary coil n of the H is in the zero sequence current transformer3The two ends of the voltage-sensing circuit generate an induced current or voltage signal, and if the voltage of the signal is greater than a set value, the signal input end V of the anti-loss control circuit chip RAH is enabledi1And Vi2The composite potential generated after the alternating voltage is superposed on the original direct current standby potential is higher than the voltage V of the internal base setting end V of the anti-loss control circuit chip RAHfWhen the set reference is limited, the chip RAH of the anti-loss control circuit immediately triggers and latches the closed state to drive the output end Vo1And is maintained in a high-potential closed state, so that the external drive circuit triode 3TV is enabled1Cutting off; to drive the output terminal Vo2And is maintained in a low potential closed state to make the external drive circuit triode 3TV2The circuit is cut off; meanwhile, the 3J coil of the circuit relay is forced to be powered off and released, the two pairs of normally open contacts of the relay 3J cut off the circuit power supply of the leakage protector and the alternating current power supply of the controlled alternating current load, the power-off state is always maintained, and the power-on can not be restored artificially, so that the leakage or electric shock can be normally and safely protected.
3. When the secondary coil n of the zero sequence current transformer H3When a disconnection fault occurs, or a sensing signal circuit has an open circuit, is suspended or has a short circuit fault with the positive electrode of a power supply, the signal input end V of the anti-loss control circuit chip RAH is enabledi1Andor Vi2The potential is high, the chip RAH of the anti-loss control circuit is triggered immediately to be latched in a closed state, so that the chip RAH drives the output end Vo1And is maintained in a high-potential closed state, so that the external drive circuit triode 3TV is enabled1Cutting off; to drive the output terminal Vo2And is maintained in a low potential closed state to make the external drive circuit triode 3TV2The circuit is cut off; meanwhile, the 3J coil of the circuit relay is forced to be released in a power-off mode, the 3J two pairs of normally open contacts of the relay cut off the circuit power supply of the leakage protector and the alternating current power supply of the controlled alternating current load, the power-off state is maintained all the time, and the non-artificial power failure can not be recovered, so that the out-of-control cannot occur, the running state of failure false protection is avoided, and a user is enabled to avoid danger. Thus, it is possible to provideAnd safety protection can be obtained when the device is abnormal.
4. When the signal input end V of the anti-loss control circuit chip RAHi1Or Vi2Detected secondary coil n of external zero sequence current transformer H3When the circuit or the sensing signal circuit is in short circuit or ground fault, the signal input end V is enabledi1Or Vi2The potential is extremely low and is lower than the underlay limit of two underlay protectors in the anti-loss control circuit chip RAH, the two underlay protectors are triggered to be latched in a closed state, and the driving output end V is enabled to beo1Output high potential and control external drive circuit triode 3TV1Cutting off; make the driving output end Vo2Output low potential to control external drive circuit triode 3TV2Cutting off; meanwhile, the 3J coil of the circuit relay is forced to be released in a power-off mode, the 3J two pairs of normally open contacts of the relay cut off the circuit power supply of the leakage protector and the alternating current power supply of the controlled alternating current load, the power-off state is maintained all the time, and the non-artificial power failure can not be recovered, so that the out-of-control cannot occur, the running state of failure false protection is avoided, and a user is enabled to avoid danger. Therefore, safety protection can be obtained even when the device is abnormal.
5. When the external base setting end V of the anti-loss control circuit chip RAHmWhen a high potential impact fault occurs, the circuit system cannot be out of control due to the reverse isolation effect of the diode D32; when the external base is set to the end VmWhen a short-circuit fault to the ground occurs, only the chip RAH of the anti-loss control circuit is triggered to be latched in a closed state, so that the driving output end V is enabledo1Output high potential and control external drive circuit triode 3TV1Cutting off; make the driving output end Vo2Output low potential to control external drive circuit triode 3TV2Cutting off; meanwhile, the 3J coil of the circuit relay is forced to be released in a power-off mode, the 3J two pairs of normally open contacts of the relay cut off the circuit power supply of the leakage protector and the alternating current power supply of the controlled alternating current load, the power-off state is maintained all the time, and the non-artificial power failure can not be recovered, so that the out-of-control cannot occur, the running state of failure false protection is avoided, and a user is enabled to avoid danger. Therefore, safety protection can be obtained even when the device is abnormal.
6. Safety control of RAH (random access memory) of anti-loss control circuit chipInput terminal VkWhen a ground short circuit fault occurs, the circuit system cannot be out of control due to the reverse isolation action of the diode D11 and the diode D21 in the anti-loss control circuit chip RAH; when the safety control input end VkWhen high potential impact fault occurs, only the RAH of the trigger anti-loss control circuit chip is latched in a closed state, so that the drive output end V is enabledo1Output high potential and control external drive circuit triode 3TV1Cutting off; make the driving output end Vo2Output low potential to control external drive circuit triode 3TV2Cutting off; meanwhile, the 3J coil of the circuit relay is forced to be released in a power-off mode, the 3J two pairs of normally open contacts of the relay cut off the circuit power supply of the leakage protector and the alternating current power supply of the controlled alternating current load, the power-off state is maintained all the time, and the non-artificial power failure can not be recovered, so that the out-of-control cannot occur, the running state of failure false protection is avoided, and a user is enabled to avoid danger. Therefore, safety protection can be obtained even when the device is abnormal.
7. When the drive output end V of the anti-loss control circuit chip RAHo1And a drive output Vo2In the event of short-circuit failure, or when a certain drive output Vo1Or Vo2When short circuit to ground or power supply anode short circuit fault occurs, the circuit system is not out of control because overcurrent and short circuit protection is provided in the output end of the common integrated operational amplifier and short circuit protection is provided in the output end of the direct current stabilized voltage power supply. Of course, there are also better technical measures to prevent runaway, which are difficult to disclose or disclose in a special integrated operational amplifier.
8. When open circuit or short circuit fault take place for direct current regulated power supply, only can force execution circuit relay 3J coil outage release certainly, relay 3J two pairs of normally open contacts cut off earth-leakage protector circuit power and controlled alternating current load's alternating current power supply to maintain the off-state all the time, non-artificial can not resume the circular telegram, therefore, can not take place out of control, avoid taking place the running state of inefficacy false guarantor, let the power consumer avoid danger. Therefore, safety protection can be obtained even when the device is abnormal.
9. Connecting terminal or connecting terminal on alternating current power supply side and/or alternating current load side of overheat-proof, failure-proof and electric leakage-proof protectorThe contact resistance of the pin jack is overlarge, the pin jack generates heat greatly when passing large current, the temperature rise is too fast and high, the equivalent resistance value of the negative temperature coefficient thermistor 3NTC is reduced rapidly, and the outer base setting end V of the anti-loss control circuit chip RAHmPotential and internal base setting terminal VfWhen the reference limit is lowered and is lower than the signal input end V of the anti-loss control circuit chip RAHi1Or Vi2When the DC standby potential is kept, the RAH of the anti-loss control circuit chip is triggered to be latched in a closed state, so that the driving output end V is enabledo1Output high potential and control external drive circuit triode 3TV1Cutting off; make the driving output end Vo2Output low potential to control external drive circuit triode 3TV2Cutting off; meanwhile, the 3J coil of the circuit relay is forced to be released in a power-off mode, the 3J two pairs of normally open contacts of the relay cut off the circuit power supply of the leakage protector and the alternating current power supply of the controlled alternating current load, the power-off state is maintained all the time, and the non-artificial power failure can not be recovered, so that the out-of-control cannot occur, the running state of failure false protection is avoided, and a user is enabled to avoid danger. Therefore, safety protection can be obtained even when the device is abnormal. In the protector for preventing failure and leakage, the negative temperature coefficient thermistor 3NTC and the resistor 3R are eliminated6There is no overheat protection function, and if the operating temperature rise of the terminals, pins and jacks on the ac power supply side and/or the ac load side is too fast and high, a fire may occur.
Therefore, the invention not only can carry out safety protection control on the electric leakage or electric shock of the alternating current load during normal work, but also can carry out safety protection control timely and reliably when the alternating current load has common abnormal faults or is overheated very much, and forces the relay to cut off the alternating current power supply of the alternating current load, so that the alternating current load and a power consumer are placed in a safe state, thereby avoiding or preventing the electric shock accident when the self faults are invalid and ensuring the personal safety during power consumption. Therefore, the anti-leakage protector is an anti-leakage protector which can prevent overheating, failure and electric shock and has the advantages of intrinsic safety guarantee.
Therefore, the beneficial effects of the invention are as follows:
1. the anti-loss control circuit chip RAH can be sensitive in normal timeGround detection zero sequence current transformer H secondary coil n3Induced weak electric leakage or electric shock signals and various weak sensing signals, and controlling the maintenance state and the trigger closed state according to the setting requirement so as to control the conduction or the cut-off of an external driving circuit and carry out power-on or power-off control on an alternating current load; when the circuit is abnormal, the open circuit fault of each port of the input, output, setting or control of the circuit, the adjacent short circuit and cross short circuit fault between the ports or the very overheat fault can be timely and reliably protected, the external driving circuit is controlled to be cut off, the execution circuit is forced to cut off the alternating current power supply, and the alternating current load and the power consumer are placed in a safe state. Therefore, the anti-runaway circuit chip RAH of the invention completely has various anti-runaway functions, has high safety performance, belongs to a core technology with strong universality, and can be applied to various technical fields needing safety control.
2. The failure-proof and leakage-proof protector or the overheating-proof and failure-proof and leakage-proof protector designed by adopting the loss control preventing circuit chip RAH as a core technology not only can control the maintenance state and the trigger closed state of the leakage or electric shock of an alternating current load in normal work, but also can control the leakage or electric shock of the alternating current load in the input, output, setting or control of the alternating current load, and the like, or can control the leakage or electric shock of the alternating current load in the input, output, setting or control of the alternating current load, and the like when the open circuit fault occurs at each port, or the adjacent short circuit and the cross short circuit3When the J coil of the relay has open circuit and short circuit faults or very overheat faults, the safety protection control can be timely and reliably carried out, the execution circuit is forced to be driven to cut off the alternating current power supply of the alternating current load, the alternating current load and a power consumer are placed in a safe state, electric shock accidents caused by self abnormal faults can be avoided or prevented, and the personal safety during power consumption is ensured. Therefore, the anti-creeping protector is an 'intrinsic safety-guaranteed' anti-failure anti-creeping protector or an anti-overheating anti-failure anti-creeping protector, and has high safety performance and important practical value and social benefit; and the updating and upgrading of national technical standards in the technical field can be promoted and exceed the international standards.
Drawings
FIG. 1 is a structural frame diagram of an anti-runaway circuit chip RAH in the present invention;
FIG. 2 is a schematic circuit diagram of an embodiment 1 or embodiment 2 of the anti-runaway circuit chip RAH according to the present invention;
FIG. 3 is a schematic diagram of an application circuit of a first example of an anti-malfunction and anti-leakage protector or an anti-overheating and anti-malfunction and anti-leakage protector with an anti-malfunction circuit chip RAH as a core;
FIG. 4 is a schematic diagram of an application circuit of a second example of the protection device for preventing the leakage of power failure and preventing the leakage of power failure, or the protection device for preventing the leakage of power failure and preventing overheating, with the RAH as the core;
fig. 5 is a schematic diagram of an application circuit of a third example of the protection device for preventing the leakage of power failure and preventing the leakage of power failure, or the protection device for preventing the leakage of power failure and preventing overheating, which takes the chip RAH of the protection circuit as a core.
In fig. 1: the first unit circuit comprises a first falling bottom protector (1) and a first contact latch (2), and the second unit circuit comprises a second contact latch (6) and a second falling bottom protector (7); the reference positioning circuit (5), the anti-reverse constant voltage circuit (9) and the bottom-supporting high-locking circuit (8) are circuits shared by two units.
Fig. 3 to 5 are schematic diagrams of application circuits of three examples of the anti-malfunction and anti-leakage protector or the anti-overheating and anti-malfunction and anti-leakage protector designed by using the anti-malfunction and anti-leakage circuit chip RAH as a core circuit or a core device.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples with reference to the accompanying drawings.
Firstly, a specific description of a structural framework diagram of an anti-runaway circuit chip RAH is as follows:
fig. 1 is a structural frame diagram of an anti-runaway circuit chip RAH according to the present invention, in which a first unit circuit is shown in an upper dotted line frame, and a second unit circuit is shown in a lower dotted line frame, the first unit circuit includes a first falling bottom protector (1) and a first contact latch (2), and the second unit circuit includes a second contact latch (6) and a second falling bottom protector (7); the reference positioning circuit (5), the anti-reverse constant voltage circuit (9) and the bottom-supporting high-locking circuit (8) are circuits shared by two units.
The connection mode of the internal circuit of the anti-loss control circuit chip RAH is as follows: a signal input terminal V of the first unit circuiti1A monitoring input end of the first falling bottom protector (1) is connected with a trigger input end of the first contact latch (2), and a driving output end V of the first unit circuito1The output end of the first falling bottom protector (1) and the limit input end V of the first falling bottom protector (1) are connectedw1The output end of the first touch-based latch (2) is connected; a signal input terminal V of the second unit circuiti2A trigger input end of the second touch latch (6) is connected with a monitoring input end of the second falling bottom protector (7), and a driving output end V of the second unit circuito2The output end of the second falling bottom protector (7) and the limit input end V of the second falling bottom protector (7) are connectedw2The output end of the second touch-based latch (6) is connected; a security control input end V shared by the two unit circuitskThe input end of the bottom-supporting high-lock circuit (8) is connected, and two output ends of the bottom-supporting high-lock circuit (8) are respectively connected with the limiting input end V of the first bottom-falling protector (1)w1And a limit input end V of a second falling bottom protector (7)w2(ii) a An external base setting end V shared by the two unit circuitsmThe external input end of the reference positioning circuit (5) is connected, and the internal base setting end V of the reference positioning circuit (5)fTwo base position setting terminals connecting the first base latch (2) and the second base latch (6); the output voltage V of the anti-reverse constant voltage circuit (9) shared by the two unit circuits+0Three power input ends of the first unit circuit, the second unit circuit and the reference positioning circuit (5) are connected, and a power input end V of the anti-reverse constant voltage circuit (9)+1Voltage V of external DC power supply+1And the power supply ground end GND of the anti-reverse constant voltage circuit (9) is externally connected with the DC power supply ground end GND. The first bottom falling protector (1) comprises an integrated operational amplifier A11, a voltage stabilizing diode WD11 or a constant current source IR11, the first base contact latch (2) comprises an integrated operational amplifier A12, resistors R11 and R12, the reference positioning circuit (5) comprises a resistor R31, a voltage stabilizing diode WD31 and a diode D32, the anti-reverse constant voltage circuit (9) comprises a diode D31, the bottom falling high-lock circuit (8) comprises diodes D11 and D21, and the second base contact latch (6) comprises a set base latchThe operational amplifier A22, the resistors R21 and R22, and the second falling bottom protector (7) comprise an integrated operational amplifier A21, a voltage-stabilizing diode WD21 or a constant current source IR 21.
Second, the specific description of embodiment 1 or embodiment 2 of the anti-runaway circuit chip RAH:
fig. 2 is a schematic circuit diagram of an embodiment 1 or embodiment 2 of the anti-runaway circuit chip RAH according to the present invention.
The circuit of embodiment 1 in fig. 2 is connected as follows: a signal input terminal V of the first unit circuiti1The inverting input (-) of the integrated operational amplifier A11, the non-inverting input (+) of the integrated operational amplifier A12 and one end of a resistor R12 are connected, the other end of the resistor R12 is connected with the output of the integrated operational amplifier A12 and the inner end of the resistor R11, the outer end of the resistor R11 and the cathode of the diode D11 are both connected with the anode of the zener diode WD11, the cathode of the zener diode WD11 is connected with the non-inverting input (+) of the integrated operational amplifier A11, and the output of the integrated operational amplifier A11 is the driving output V of the first unit circuito1(ii) a A signal input terminal V of the second unit circuiti2The output end of the integrated operational amplifier A21 is the driving output end V of the second unit circuit, and the output end V of the integrated operational amplifier A21 is connected to the non-inverting input end (+) of the integrated operational amplifier A22 and one end of the resistor R22, the other end of the resistor R22 is connected to the output end of the integrated operational amplifier A22 and the inner end of the resistor R21, the outer end of the resistor R21 and the cathode of the diode D21 are both connected to the anode of the zener diode WD21, the cathode of the zener diode WD21 is connected to the inverting input end (-) of the integrated operational amplifier A21, ando2(ii) a A security control input end V shared by the two unit circuitskThe anodes of the diodes D11 and D21 are connected, and the cathode of the diode D11 is connected with a limit input end Vw1The cathode of the diode D21 is connected with a limit input end Vw2(ii) a An external base setting end V shared by the two unit circuitsmThe cathode of the diode D32 is connected, the anode of the diode D32 is connected with the two inverting input terminals (-) of the integrated operational amplifier A12 and the integrated operational amplifier A22, one end of the resistor R31 and the cathode of the voltage stabilizing diode WD31 to be used as the internal base setting terminal V of the reference positioning circuit (5)fThe anode of the voltage stabilizing diode WD31 is connected with an integrated operational amplifier A11The power ground GND of the A12 and the integrated operational amplifiers A21 and A22 are used as the power ground GND of the whole anti-loss control circuit chip RAH, and the other end of the resistor R31 is connected with the cathode of the diode D31 and the power input ends (V) of the integrated operational amplifiers A11 and A12 and the integrated operational amplifiers A21 and A22+0) The anode of the diode D31 is used as the power input end V of the whole anti-loss control circuit chip RAH+1Voltage V of external DC power supply+1A terminal; according to the circuit characteristics of embodiment 1, the diode D12, the diode D22, and the not gate F2 in fig. 2 and the circuit connections thereof have been eliminated.
The circuit of embodiment 2 in fig. 2 is characterized in that: on the basis of completely adopting the circuit of the specific embodiment 1 of the anti-lost control circuit chip RAH, a diode D12, a diode D22 and a NOT gate F2 are additionally connected; the anode of the diode D12 is connected with the output end of the integrated operational amplifier A11, and the cathode of the diode D12 is connected with the anode of the voltage-stabilizing diode WD11, the cathode of the diode D11 and the outer end of the resistor R11; the cathode of the diode D22 is connected with the anode of the voltage-stabilizing diode WD21, the cathode of the diode D21 and the outer end of the resistor R21, the anode of the diode D22 is connected with the output end of the NOT gate F2, and the input end of the NOT gate F2 is connected with the output end of the integrated operational amplifier A21.
(II) the circuit working principle of the specific embodiment 1 or embodiment 2 of the anti-runaway circuit chip RAH in FIG. 2 is as follows:
1. when the circuit is working normally, if the first unit circuit signal input end Vi1Andor second unit circuit signal input terminal Vi2The DC standby potential of the integrated operational amplifiers A12 and A22, i.e. the potentials of the two non-inverting input terminals (+) of the integrated operational amplifiers A12 and A22 (i.e. the potentials of the two trigger input terminals of the two touch-based latches) are slightly lower than the potential of the internal-based setting terminal VfThe internal reference limit (stabilized by the stabilized voltage value of the voltage stabilizing diode WD31 and the resistor R31 in the reference positioning circuit (5) or adjusted externally by connecting an adjustable resistor in series with the power ground GND through the cathode of the diode D32) arranged for the two inverting input ends (-) of the integrated operational amplifiers A12 and A22 respectively, so that the output ends of the integrated operational amplifiers A12 and A22 output low potentials respectively, and the integrated operational amplifiers A12 and A22 are latched in a standby state due to the positive feedback action of the resistors R12 and R22 to maintain the output low potentials to output low potentials respectively(ii) a The low potential output by the integrated operational amplifier a12 is boosted by the resistor R11 and transmitted to the positive electrode of the zener diode WD11, and then boosted by the zener diode WD11, so that the potential (+) of the positive input terminal of the integrated operational amplifier a11 is still slightly lower than the potential (-) of the negative input terminal thereof (i.e., the potential V of the monitoring input terminal of the first bottom-drop protector)i1) The integrated operational amplifier a11 outputs a low voltage to the driving output terminal V of the first unit circuito1Pulling an external circuit to conduct work; the low potential output by the integrated operational amplifier a22 is boosted by the resistor R21 and transmitted to the positive electrode of the zener diode WD21, and then boosted by the zener diode WD21, so that the (-) potential of the inverting input terminal of the integrated operational amplifier a21 is still slightly lower than the (+) potential of the non-inverting input terminal thereof (i.e., the potential V of the monitoring input terminal of the second bottom-drop protector)i2) Then the integrated operational amplifier A21 outputs a high voltage to the driving output terminal V of the second unit circuito2Promoting the conduction work of an external circuit; the execution circuit is switched on by the AC power supply. At this time, the diode D12, the diode D22 and the not gate F2 of the embodiment 2 are only respectively applied to the limit input terminal Vw1And a limit input terminal Vw2And the reverse isolation function is realized.
2. When the first unit circuit signal input terminal Vi1Andor second unit circuit signal input terminal Vi2When detecting that the external leakage or electric shock signal voltage or the sensing signal voltage amplitude reaches the trigger set value, the potentials of the two positive phase input ends (+) of the integrated operational amplifiers A12 and A22 (namely the potentials of the two trigger input ends of the two touch latches) are slightly higher than the potential of the internal base set end VfThe internal reference limit set for the two inverting input ends (-) of the integrated operational amplifiers A12 and A22 is provided, then the output ends of the integrated operational amplifiers A12 and A22 output high potentials respectively, and due to the positive feedback effect of the resistors R12 and R22, the integrated operational amplifiers A12 and A22 are triggered and locked in a closed state, and the high potential output is maintained respectively; the high potential output by the integrated operational amplifier A12 is boosted by the resistor R11 and transmitted to the anode of the voltage regulator diode WD11, and then boosted by the voltage regulator diode WD11, so that the potential (+) at the positive input terminal of the integrated operational amplifier A11 is suddenly higher than the potential (-) at the negative input terminal thereof (i.e., the potential V at the monitoring input terminal of the first bottom-drop protector)i1) Then integrate the operationThe operational amplifier A11 outputs high potential to the driving output terminal V of the first unit circuito1Cutting off the external circuit; the high potential output by the integrated operational amplifier A22 is boosted by the resistor R21 and transmitted to the anode of the voltage regulator diode WD21, and then boosted by the voltage regulator diode WD21, so that the potential (-) at the inverting input terminal of the integrated operational amplifier A21 is suddenly increased to be higher than the potential (+) at the non-inverting input terminal thereof (i.e., the potential V at the monitoring input terminal of the second bottom-drop protectori2) The integrated operational amplifier A21 outputs a low voltage to the driving output terminal V of the second unit circuito2Turning off the external circuit; meanwhile, the execution circuit is forced to cut off the alternating current power supply, and the alternating current load is placed in a safe state. In embodiment 2, the diode D12 is fed back to the potential (+) of the non-inverting input terminal (+) of the integrated operational amplifier a11 through the zener diode WD11, and is triggered to be locked in a closed state; the re-compensated diode D22 and the NOT gate F2 feed back the potential of the inverted input (-) of the integrated operational amplifier A21 to be higher through the voltage stabilizing diode WD21, and trigger locking is also carried out in a closed state. The safety protection device meets the high reliability requirement of ensuring safety control when the electric shock protection device meets a trigger signal.
3. When the signal input end Vi1Or Vi2Secondary coil n for detecting external zero sequence current transformer H3When the circuit or the sensing signal circuit has open circuit, suspension or short circuit to the positive pole of the power supply, the signal input end V is enabledi1Or Vi2The potential is also higher than the inner base setting end VfThe voltage level of the integrated operational amplifiers A12 and A22 is latched in a closed state to maintain high voltage output, so that the integrated operational amplifier A11 outputs high voltage to the driving output terminal Vo1And maintaining the high potential closed state to cut off the external circuit; the integrated operational amplifier A21 outputs low potential to the driving output terminal Vo2And maintaining the low potential closed state to cut off the external circuit; meanwhile, the execution circuit is forced to cut off the alternating current power supply, and the alternating current load is placed in a safe state.
4. When the signal input end Vi1Or Vi2Detected secondary coil n of external zero sequence current transformer H3When a short circuit or a ground fault occurs in a circuit or a sensing signal circuit, a signal is generatedInput terminal Vi1Or Vi2The potential is extremely low, so that the integrated operational amplifiers A12 and A22 both output low potentials, the integrated operational amplifiers A12 and A22 are latched in a normally-on state due to the positive feedback action of the resistors R12 and R22, the low potentials are respectively maintained to be output at low potentials, the low potentials are raised by the resistor R11 and boosted by the voltage regulator diode WD11, and the potential of a positive phase input end (+) of the integrated operational amplifier A11 is still slightly higher than the potential V of an inverting input end (-) of the integrated operational amplifier A11i1(i.e., the voltage at the monitor input of the first falling bottom prevention device), the integrated operational amplifier A11 outputs a high voltage to the driving output V of the first unit circuito1Cutting off the external circuit; the high voltage output from the integrated operational amplifier A22 is boosted by the resistor R21 and the zener diode WD21, so that the (-) voltage level at the inverting input of the integrated operational amplifier A21 is still slightly higher than the (+) voltage level at the non-inverting input (i.e. the voltage V at the monitor input of the second bottom-falling protector)i2) The integrated operational amplifier A21 outputs a low voltage to the driving output terminal V of the second unit circuito2Turning off the external circuit; meanwhile, the execution circuit is forced to cut off the alternating current power supply, and the alternating current load is placed in a safe state.
5. When the external base is set to the end VmWhen a high potential impact fault occurs, the circuit system cannot be out of control due to the reverse isolation effect of the diode D32; when the external base is set to the end VmWhen a short-circuit fault to the ground occurs, only the integrated operational amplifiers A12 and A22 are triggered and locked in a closed state to maintain high-potential output respectively, so that the integrated operational amplifier A11 outputs high potential to the driving output end Vo1And maintaining the high potential closed state to cut off the external circuit; the integrated operational amplifier A21 outputs low potential to the driving output terminal Vo2And maintaining the high potential closed state to cut off the external circuit; meanwhile, the execution circuit is forced to cut off the alternating current power supply, and the alternating current load is placed in a safe state.
6. When the safety control input end VkWhen a short-circuit fault to the ground occurs, the circuit system cannot be out of control due to the reverse isolation action of the diode D11 and the diode D21; when the safety control input end VkWhen the high potential surge fault occurs, only the integrated operational amplifier A11 outputs high potential to the driving output end Vo1And maintaining the high potential closed state to cut off the external circuit; the integrated operational amplifier A21 outputs low potential to the driving output terminal Vo2And maintaining the low potential closed state to cut off the external circuit; meanwhile, the execution circuit is forced to cut off the alternating current power supply, and the alternating current load is placed in a safe state.
7. When driving the output terminal Vo1Andor Vo2When short-circuit fault occurs, only the internal integrated operational amplifier A11 and the integrated operational amplifier A21 are kept in a closed state, the external driving circuit is in a cut-off state, the execution circuit is forced to cut off the alternating current power supply, and the circuit system cannot be out of control; when a certain driving output end Vo1Or Vo2When short circuit to ground or power supply anode short circuit fault occurs, the circuit system is not out of control because overcurrent and short circuit protection is provided in the output end of the common integrated operational amplifier and short circuit protection is provided in the output end of the direct current stabilized voltage power supply. Of course, there are also better technical measures to prevent runaway, which are difficult to disclose or disclose in a special integrated operational amplifier.
8. When the direct current stabilized voltage power supply has an open circuit or short circuit fault, the execution circuit is only forced to disconnect the alternating current power supply, and the alternating current load is placed in a safe state.
According to the above working principle, the basic working principle of the first unit circuit and the second unit circuit in the loss control prevention circuit chip RAH is substantially the same, and the difference between the first unit circuit and the second unit circuit is as follows: the characteristics of the first falling bottom protector (1) and the second falling bottom protector (7) are complementary, the phases of output levels are opposite, and the safety control of an alternating current load (electrical appliance) can be simply realized by using a series control execution circuit of the first falling bottom protector and the second falling bottom protector.
Third, a first example of the anti-failure and anti-leakage protector or the anti-overheating and anti-failure and anti-leakage protector is specifically described:
fig. 3 is a schematic diagram of an application circuit of a first example of an anti-malfunction and anti-leakage protector or an anti-overheating and anti-malfunction and anti-leakage protector with an anti-malfunction circuit chip RAH as a core. Wherein:
the first example of the protector comprises a zero sequence current transformer H, a rear-stage drive circuit and an execution circuitAC voltage reduction rectification DC voltage-stabilized power supply (18), its characterized in that: the circuit also comprises a core device RAH and a preceding stage detection circuit; the zero sequence current transformer H consists of an annular iron core and a primary coil n1、n2And a secondary coil n3The preceding stage detection circuit is composed of a secondary coil n of a zero sequence current transformer H3And a resistance 3R1、3R2、3R3The core device RAH adopts an anti-loss control circuit chip RAH shown in figure 1 or figure 2, and the rear-stage driving circuit is composed of a resistor 3R7、3R8And a zener diode 3WD1、3WD2And triode 3TV1、3TV2The execution circuit is composed of a relay 3J and a diode 3D3And (4) forming.
The first example of the failure-preventing and leakage-preventing protector is connected to the circuit in the following manner: two alternating current input ends (L) of the alternating current voltage reduction rectification direct current stabilized power supply (18)1～N1) Two AC lines L connected to an AC load side1、N1The DC voltage V output by the AC step-down rectification DC stabilized power supply (18)+2Higher than DC voltage V+1Primary coil n of the zero sequence current transformer H1、n2Is two AC power lines L penetrating into the annular iron core hole1、N1Secondary coil n of zero sequence current transformer H3Is a coil wound on a toroidal core thereof, the secondary coil n3One end of the input terminal is connected with the safety control input terminal V of the core device RAHkSecondary winding n3Another end of the resistor 3R2、3R3On the series connection point of (3R)3The other end is connected with a signal input end V of a core device RAHi1And Vi2Resistance 3R2The other end is connected with a power ground end GND and a resistor 3R1One end is connected with a direct current voltage V+1Resistance 3R1The other end is connected with the safety control input end V of the core device RAHkA driving output terminal V of the core device RAHo1Connecting resistor 3R7One terminal, resistor 3R7The other end is connected with a voltage stabilizing diode 3WD1Positive, zener diode 3WD1Negative pole connected to three poleTube 3TV1Base, triode 3TV1Emitter connected DC voltage V+2The driving output end V of the core device RAHo2Connecting resistor 3R8One terminal, resistor 3R8The other end is connected with a voltage stabilizing diode 3WD2Negative, zener diode 3WD2Triode 3TV is connected to positive pole2Base, triode 3TV2The emitter is connected with a power ground terminal GND, and the diode 3D in the execution circuit3Negative electrode connected triode 3TV1Collector, diode 3D3Triode 3TV is connected to positive pole2Collector, relay 3J coil both ends are parallelly connected at diode 3D3Two poles of the earth, two pairs of normally open contacts of the relay 3J are connected with an alternating current power supply (L, N) for controlling an alternating current load, QD is a manual starting button, and the QD is connected with an alternating current voltage reduction rectification direct current stabilized voltage power supply (18) and an alternating current power supply (L, N) for the controlled alternating current load after being pressed down. According to the first embodiment of the circuit characteristic of the protector against failure and leakage, the NTC and 3R of the NTC thermistor 3 in FIG. 3 have been eliminated6And its circuit connection.
As a first example of the improved overheat-proof, failure-proof and leakage-proof protector or overheat-proof, failure-proof and leakage-proof protection plug and socket, its application circuit is also shown in fig. 3: on the basis of completely adopting the application circuit of the first failure-preventing and leakage-preventing protector, an overheating protection circuit is added; the overheating protection circuit consists of a negative temperature coefficient thermistor 3NTC and a resistor 3R6The negative temperature coefficient thermistor 3NTC is used for monitoring the working temperature of a wiring terminal or a pin or a jack of an alternating current power supply side and/or an alternating current load side, one end of the negative temperature coefficient thermistor 3NTC is connected with a power supply ground end GND, the other end of the negative temperature coefficient thermistor 3NTC is connected with a resistor 3R6One terminal, resistor 3R6The other end is connected with an external base setting end V of the core device RAHmAbove.
(II) the principle of the applied circuit of the first anti-failure and anti-leakage protector or the first anti-overheating and anti-failure and anti-leakage protector is as follows:
1. after the QD is manually pressed, the normally open contact of the relay of the execution circuit maintains the attraction state, the alternating current power supply is continuously connected, and the leakage protection is realizedThe device circuit system and the controlled alternating current load thereof are electrified to work. If the controlled AC load works normally and no electric leakage or electric shock occurs, the controlled AC load works normally through the AC power line L1、N1The currents are equal in magnitude and opposite in direction, and the magnetic flux induced in the annular iron core of the zero sequence current transformer H is offset to zero, so that the secondary coil n of the zero sequence current transformer H is3No AC current or voltage is generated at the two ends, at this time, the signal input end V of the anti-loss control circuit chip RAHi1And Vi2The DC standby potential is slightly lower than the safety control input end VkAnd an external base setting terminal VmMaintaining the chip RAH in standby state by DC potential to make the driving output end V of the chip RAH in standby stateo1Output low level, drive output terminal Vo2And outputting high level to control the conduction of the driving circuit, so that the execution circuit relay 3J maintains the attraction state and is continuously connected with the alternating current power supply.
2. If the controlled AC load generates leakage or electric shock, the AC power line L is enabled1、N1Produce unbalanced alternating current, and produce induced magnetic flux in the H-ring core of the zero sequence current transformer, so that the secondary coil n of the H is in the zero sequence current transformer3The two ends of the voltage-sensing circuit generate an induced current or voltage signal, and if the voltage of the signal is greater than a set value, the signal input end V of the anti-loss control circuit chip RAH is enabledi1And Vi2The composite potential generated after the alternating voltage is superposed on the original direct current standby potential is higher than the voltage V of the internal base setting end V of the anti-loss control circuit chip RAHfWhen the set reference is limited, the chip RAH of the anti-loss control circuit immediately triggers and latches the closed state to drive the output end Vo1And is maintained in a high-potential closed state, so that the external drive circuit triode 3TV is enabled1Cutting off; to drive the output terminal Vo2And is maintained in a low potential closed state to make the external drive circuit triode 3TV2The circuit is cut off; meanwhile, the 3J coil of the circuit relay is forced to be powered off and released, the two pairs of normally open contacts of the relay 3J cut off the circuit power supply of the leakage protector and the alternating current power supply of the controlled alternating current load, the power-off state is always maintained, and the power-on can not be restored artificially, so that the leakage or electric shock can be normally and safely protected.
3. When the secondary coil n of the zero sequence current transformer H3When a disconnection fault occurs, or a sensing signal circuit has an open circuit, is suspended or has a short circuit fault with the positive electrode of a power supply, the signal input end V of the anti-loss control circuit chip RAH is enabledi1Andor Vi2The potential is high, the chip RAH of the anti-loss control circuit is triggered immediately to be latched in a closed state, so that the chip RAH drives the output end Vo1And is maintained in a high-potential closed state, so that the external drive circuit triode 3TV is enabled1Cutting off; to drive the output terminal Vo2And is maintained in a low potential closed state to make the external drive circuit triode 3TV2The circuit is cut off; meanwhile, the 3J coil of the circuit relay is forced to be released in a power-off mode, the 3J two pairs of normally open contacts of the relay cut off the circuit power supply of the leakage protector and the alternating current power supply of the controlled alternating current load, the power-off state is maintained all the time, and the non-artificial power failure can not be recovered, so that the out-of-control cannot occur, the running state of failure false protection is avoided, and a user is enabled to avoid danger. Therefore, safety protection can be obtained even when the device is abnormal.
4. When the signal input end V of the anti-loss control circuit chip RAHi1Or Vi2Detected secondary coil n of external zero sequence current transformer H3When the circuit or the sensing signal circuit is in short circuit or ground fault, the signal input end V is enabledi1Or Vi2The potential is extremely low and is lower than the underlay limit of two underlay protectors in the anti-loss control circuit chip RAH, the two underlay protectors are triggered to be latched in a closed state, and the driving output end V is enabled to beo1Output high potential and control external drive circuit triode 3TV1Cutting off; make the driving output end Vo2Output low potential to control external drive circuit triode 3TV2Cutting off; meanwhile, the 3J coil of the circuit relay is forced to be released in a power-off mode, the 3J two pairs of normally open contacts of the relay cut off the circuit power supply of the leakage protector and the alternating current power supply of the controlled alternating current load, the power-off state is maintained all the time, and the non-artificial power failure can not be recovered, so that the out-of-control cannot occur, the running state of failure false protection is avoided, and a user is enabled to avoid danger. Therefore, safety protection can be obtained even when the device is abnormal.
5. External base setting of RAH (random access memory) of anti-loss control circuit chipTerminal VmWhen a high potential impact fault occurs, the circuit system cannot be out of control due to the reverse isolation effect of the diode D32; when the external base is set to the end VmWhen a short-circuit fault to the ground occurs, only the chip RAH of the anti-loss control circuit is triggered to be latched in a closed state, so that the driving output end V is enabledo1Output high potential and control external drive circuit triode 3TV1Cutting off; make the driving output end Vo2Output low potential to control external drive circuit triode 3TV2Cutting off; meanwhile, the 3J coil of the circuit relay is forced to be released in a power-off mode, the 3J two pairs of normally open contacts of the relay cut off the circuit power supply of the leakage protector and the alternating current power supply of the controlled alternating current load, the power-off state is maintained all the time, and the non-artificial power failure can not be recovered, so that the out-of-control cannot occur, the running state of failure false protection is avoided, and a user is enabled to avoid danger. Therefore, safety protection can be obtained even when the device is abnormal.
6. Safety control input end V of anti-loss control circuit chip RAHkWhen a ground short circuit fault occurs, the circuit system cannot be out of control due to the reverse isolation action of the diode D11 and the diode D21 in the anti-loss control circuit chip RAH; when the safety control input end VkWhen high potential impact fault occurs, only the RAH of the trigger anti-loss control circuit chip is latched in a closed state, so that the drive output end V is enabledo1Output high potential and control external drive circuit triode 3TV1Cutting off; make the driving output end Vo2Output low potential to control external drive circuit triode 3TV2Cutting off; meanwhile, the 3J coil of the circuit relay is forced to be released in a power-off mode, the 3J two pairs of normally open contacts of the relay cut off the circuit power supply of the leakage protector and the alternating current power supply of the controlled alternating current load, the power-off state is maintained all the time, and the non-artificial power failure can not be recovered, so that the out-of-control cannot occur, the running state of failure false protection is avoided, and a user is enabled to avoid danger. Therefore, safety protection can be obtained even when the device is abnormal.
7. When the drive output end V of the anti-loss control circuit chip RAHo1And a drive output Vo2In the event of short-circuit failure, or when a certain drive output Vo1Or Vo2When a short circuit to the ground or a short circuit fault to the positive electrode of the power supply occurs,because the common integrated operational amplifier output end is internally provided with the overcurrent and short circuit prevention protection, and the direct current stabilized voltage power supply output end is also internally provided with the short circuit prevention protection, the out-of-control cannot be caused. Of course, there are also better technical measures to prevent runaway, which are difficult to disclose or disclose in a special integrated operational amplifier.
8. When open circuit or short circuit fault take place for direct current regulated power supply, only can force execution circuit relay 3J coil outage release certainly, relay 3J two pairs of normally open contacts cut off earth-leakage protector circuit power and controlled alternating current load's alternating current power supply to maintain the off-state all the time, non-artificial can not resume the circular telegram, therefore, can not take place out of control, avoid taking place the running state of inefficacy false guarantor, let the power consumer avoid danger. Therefore, safety protection can be obtained even when the device is abnormal.
9. If the contact resistance of the AC power supply side and/or the connecting terminal or the pin or the jack of the AC load side of the overheat-proof, failure-proof and leakage-proof protector is too large, the protector generates heat greatly when passing large current, the temperature rise is too high, the resistance value of the negative temperature coefficient thermistor 3NTC is reduced rapidly, and the outer base setting end V of the loss-proof circuit chip RAH is reducedmPotential and internal base setting terminal VfWhen the reference limit is lowered and is lower than the signal input end V of the anti-loss control circuit chip RAHi1Or Vi2When the DC standby potential is kept, the RAH of the anti-loss control circuit chip is triggered to be latched in a closed state, so that the driving output end V is enabledo1Output high potential and control external drive circuit triode 3TV1Cutting off; make the driving output end Vo2Output low potential to control external drive circuit triode 3TV2Cutting off; meanwhile, the 3J coil of the circuit relay is forced to be released in a power-off mode, the 3J two pairs of normally open contacts of the relay cut off the circuit power supply of the leakage protector and the alternating current power supply of the controlled alternating current load, the power-off state is maintained all the time, and the non-artificial power failure can not be recovered, so that the out-of-control cannot occur, the running state of failure false protection is avoided, and a user is enabled to avoid danger. Therefore, safety protection can be obtained even when the device is abnormal. In the protector for preventing failure and leakage, the negative temperature coefficient thermistor 3NTC and the resistor 3R are eliminated6There is no overheat protection function, if it is handed overThe working temperature rise of the connecting terminals or pins and jacks at the side of the current source and/or the alternating current load is too high, so that a fire disaster can happen.
Therefore, the invention can not only carry out safety protection control on the electric leakage or electric shock of the alternating current load during normal work, but also timely and reliably carry out safety protection control when the alternating current load has common abnormal faults or is overheated, and forces the relay 3J to cut off the alternating current power supply of the alternating current load so as to place the alternating current load and a power consumer in a safe state, thereby avoiding or preventing the electric shock accident when the self faults are invalid and ensuring the personal safety during power consumption. Therefore, the anti-leakage protector is an anti-leakage protector which can prevent overheating, failure and electric shock and has the advantages of intrinsic safety guarantee.
Fourthly, specifically explaining a second example of the anti-failure and anti-electric-leakage protector or the anti-overheating and anti-failure and anti-electric-leakage protector:
fig. 4 is a schematic diagram of an application circuit of a second example of the protection device for preventing the leakage of electricity and the malfunction, or the protection device for preventing overheating and the malfunction, taking the chip RAH of the circuit for preventing the malfunction as a core. Wherein:
the second example prevents losing effect anticreep protector, including zero sequence current transformer H, execution circuit, interchange step-down rectification direct current constant voltage power supply (18), its characterized in that: the circuit also comprises a core device RAH and a preceding stage detection circuit; the zero sequence current transformer H consists of an annular iron core and a primary coil n1、n2And a secondary coil n3The preceding stage detection circuit is composed of a secondary coil n of a zero sequence current transformer H3And a resistance 4R1、4R2、4R3The core device RAH adopts an anti-loss control circuit chip RAH shown in figure 1 or figure 2, and the execution circuit comprises a relay 4J and a diode 4D2、4D3And (4) forming.
The second example of the circuit connection mode of the malfunction-proof and leakage-proof protector is as follows: two alternating current input ends (L) of the alternating current voltage reduction rectification direct current stabilized power supply (18)1～N1) Two AC lines L connected to an AC load side1、N1Above, output from a regulated DC power supply (18) with AC step-down rectificationDC voltage V+2Higher than DC voltage V+1Primary coil n of the zero sequence current transformer H1、n2Is two AC power lines L penetrating into the annular iron core hole1、N1Secondary coil n of zero sequence current transformer H3Is a coil wound on a toroidal core thereof, the secondary coil n3One end of the input terminal is connected with the safety control input terminal V of the core device RAHkSecondary winding n3Another end of the resistor 4R2、4R3On the series connection point of (3), a resistor 4R3The other end is connected with a signal input end V of a core device RAHi1And Vi2Resistance 4R2The other end is connected with a power ground end GND and a resistor 4R1One end is connected with a direct current voltage V+1Resistance 4R1The other end is connected with the safety control input end V of the core device RAHkThe two ends of the relay 4J coil of the executive circuit are connected in parallel with the diode 4D3Bipolar, diode 4D2、4D3After the anodes are connected, the diode 4D2The cathode is connected with the drive output end V of the core device RAHo1Diode 4D3The cathode is connected with the drive output end V of the core device RAHo2Two pairs of normally open contacts of the relay 4J are connected with an alternating current power supply (L, N) for controlling an alternating current load, QD is a manual starting button, and the QD is pressed to connect an alternating current voltage reduction rectification direct current stabilized voltage power supply (18) and an alternating current power supply (L, N) for the controlled alternating current load. According to the second circuit characteristic of the protector against failure and leakage, the NTC and 4R of the NTC thermistor 4 in FIG. 4 have been eliminated6And its circuit connection.
As a second example of the improved overheat-proof, failure-proof and leakage-proof protector or overheat-proof, failure-proof and leakage-proof protection plug and socket, the application circuit is also shown in fig. 4: on the basis of completely adopting the application circuit of the second failure-preventing and leakage-preventing protector, an overheating protection circuit is added; the overheating protection circuit consists of a negative temperature coefficient thermistor 4NTC and a resistor 4R6The negative temperature coefficient thermistor 4NTC is used for monitoring the working temperature of a wiring terminal or a pin or a jack of an alternating current power supply side and/or an alternating current load side, and the negative temperature coefficient thermistorOne end of the 4NTC is connected with a power ground end GND, and the other end of the negative temperature coefficient thermistor 4NTC is connected with a resistor 4R6One terminal, resistor 4R6The other end is connected with an external base setting end V of the core device RAHmAbove.
(II) the second embodiment of the anti-failure and anti-leakage protector or the anti-overheating and anti-failure and anti-leakage protector has the following applied circuit principle:
the second embodiment has the same principle as the first embodiment, except that in the second embodiment, the circuit of the protector (including the relay 4J and the diode 4D) is directly connected to the execution circuit (including the relay 4J and the diode 4D)2And diode 4D3) A drive output end V connected in series with the anti-loss control circuit chip RAHo1And a drive output Vo2The performances of the two anti-failure and anti-leakage protectors or the anti-overheating and anti-failure and anti-leakage protectors are basically the same. In order to limit the number of pages in the specification, the circuit principle of the second anti-failure and anti-leakage protector or the anti-overheating and anti-failure and anti-leakage protector is forbidden to be repeated.
Fifthly, specifically explaining a third example of the anti-failure and anti-leakage protector or the anti-overheating and anti-failure and anti-leakage protector:
fig. 5 is a schematic diagram of an application circuit of a third example of the protection device for preventing the leakage of power failure and preventing the leakage of power failure, or the protection device for preventing overheating and preventing the leakage of power failure, which takes the chip RAH of the circuit for preventing the leakage of power failure as a core. Wherein:
the third example prevents losing effect anticreep protector, including zero sequence current transformer H, back level drive circuit and execution circuit, exchange step down rectification direct current constant voltage power supply (18), its characterized in that: the system also comprises a core device RAH, a preceding stage detection circuit and a safety control circuit; the zero sequence current transformer H consists of an annular iron core and a primary coil n1、n2And a secondary coil n3The preceding stage detection circuit is composed of a secondary coil n of a zero sequence current transformer H3And a resistor 5R2、5R3The core device RAH adopts an anti-loss control circuit chip RAH shown in figure 1 or figure 2, and the safety control circuit only comprises a resistor 5R6Undertake, the rear driveThe circuit is composed of a resistor 5R7、5R8And a zener diode 5WD1、5WD2And triode 5TV1、5TV2The executive circuit is composed of a relay 5J and a diode 5D3And (4) forming.
The third example of the circuit connection mode of the malfunction-proof and leakage-proof protector is as follows: two alternating current input ends (L) of the alternating current voltage reduction rectification direct current stabilized power supply (18)1～N1) Two AC lines L connected to an AC load side1、N1The DC voltage V output by the AC step-down rectification DC stabilized power supply (18)+2Higher than DC voltage V+1Primary coil n of the zero sequence current transformer H1、n2Is two AC power lines L penetrating into the annular iron core hole1、N1Secondary coil n of zero sequence current transformer H3Is a coil wound on a toroidal core thereof, the secondary coil n3One end of which is connected with an external base setting end V of the core device RAHmSecondary winding n3Another end of the resistor 5R2、5R3On the series connection point of (3), a resistor 5R3The other end is connected with a signal input end V of a core device RAHi1And Vi2Resistance 5R2The other end is connected with a power ground end GND and a resistor 5R6One end is connected with a direct current voltage V+2Resistance 5R6The other end is connected with the safety control input end V of the core device RAHkA driving output terminal V of the core device RAHo1Connecting resistor 5R7One terminal, resistor 5R7The other end is connected with a voltage stabilizing diode 5WD1Positive, zener diode 5WD1The negative electrode is connected with the triode 5TV1Base, triode 5TV1Emitter connected DC voltage V+2The driving output end V of the core device RAHo2Connecting resistor 5R8One terminal, resistor 5R8The other end is connected with a voltage stabilizing diode 5WD2Negative, zener diode 5WD2The anode is connected with a triode 5TV2Base, triode 5TV2The emitter is connected with a power ground terminal GND, and the diode 5D in the execution circuit3Negative electrode connected triode 5TV1Collector, diode5D3The anode is connected with a triode 5TV2Collector, relay 5J coil both ends are parallelly connected at diode 5D3Two poles of the earth, two pairs of normally open contacts of the relay 5J are connected with an alternating current power supply (L, N) for controlling an alternating current load, QD is a manual starting button, and the QD is connected with an alternating current voltage reduction rectification direct current stabilized voltage power supply (18) and an alternating current power supply (L, N) for the controlled alternating current load after being pressed down. According to the applied circuit characteristics of the third embodiment of the device for preventing the electric leakage and the malfunction, the negative temperature coefficient thermistor 5NTC and its circuit connection shown in FIG. 5 have been eliminated.
As a third example of the improved overheat-proof, failure-proof and leakage-proof protector or overheat-proof, failure-proof and leakage-proof protection plug and socket, the application circuit is also shown in fig. 5: on the basis of completely adopting the application circuit of the third example of the anti-failure and anti-leakage protector, an overheating protection circuit is added; the overheat protection circuit is arranged on the original resistor 5R6The two ends of the thermistor are connected with a negative temperature coefficient thermistor 5NTC in parallel, the negative temperature coefficient thermistor 5NTC is used for monitoring the working temperature of a wiring terminal or a pin or a jack of an alternating current power supply side or an alternating current load side, and the negative temperature coefficient thermistor 5NTC and a resistor 5R6After parallel connection, one end of the parallel connection is connected with a safety control input end V of the core device RAHkThe other end of the parallel connection is connected to a direct current voltage V+2Above.
(II) the working principle of the third example of the applied circuit of the anti-failure and anti-leakage protector or the anti-overheating and anti-failure and anti-leakage protector is as follows:
1. after the start button QD is manually pressed, the normally open contact of the execution circuit relay maintains the attraction state, the alternating current power supply is continuously connected, and the leakage protector circuit system and the controlled alternating current load thereof are electrified to work. If the controlled AC load works normally and no electric leakage or electric shock occurs, the controlled AC load works normally through the AC power line L1、N1The currents are equal in magnitude and opposite in direction, and the magnetic flux induced in the annular iron core of the zero sequence current transformer H is offset to zero, so that the secondary coil n of the zero sequence current transformer H is3No AC current or voltage is generated at the two ends, at this time, the signal input end V of the anti-loss control circuit chip RAHi1And Vi2The DC standby potential is slightly lower than the external base setting end VmAnd a safety control input end VkMaintaining the chip RAH in standby state by DC potential to make the driving output end V of the chip RAH in standby stateo1Output low level, drive output terminal Vo2And outputting high level to control the conduction of the driving circuit, so that the execution circuit relay 5J maintains the attraction state and continuously connects the alternating current power supply.
2. If the controlled AC load generates leakage or electric shock, the AC power line L is enabled1、N1Produce unbalanced alternating current, and produce induced magnetic flux in the H-ring core of the zero sequence current transformer, so that the secondary coil n of the H is in the zero sequence current transformer3The two ends of the voltage-sensing circuit generate an induced current or voltage signal, and if the voltage of the signal is greater than a set value, the signal input end V of the anti-loss control circuit chip RAH is enabledi1And Vi2The composite potential generated after the alternating voltage is superposed on the original direct current standby potential is higher than the voltage V of the internal base setting end V of the anti-loss control circuit chip RAHfWhen the set reference is limited, the chip RAH of the anti-loss control circuit immediately triggers and latches the closed state to drive the output end Vo1And is maintained in a high-potential closed state, so that the triode 5TV in the external drive circuit1Cutting off; to drive the output terminal Vo2And is maintained in a low potential closed state, so that the triode 5TV in the external drive circuit2The circuit is cut off; meanwhile, the 5J coil of the execution circuit relay is forced to be released in a power failure mode, the two pairs of normally open contacts of the relay 5J cut off a circuit power supply of the leakage protector and an alternating current power supply of a controlled alternating current load, the power failure state is maintained all the time, and the power cannot be restored artificially, so that the leakage or electric shock can be protected normally and safely.
3. When the secondary coil n of the zero sequence current transformer H3When a disconnection fault occurs, or a sensing signal circuit has an open circuit, is suspended or has a short circuit fault with the positive electrode of a power supply, the signal input end V of the anti-loss control circuit chip RAH is enabledi1Andor Vi2The potential is high, the chip RAH of the anti-loss control circuit is triggered immediately to be latched in a closed state, so that the chip RAH drives the output end Vo1Maintaining the high potential closed state to make the external drive circuit triode 3TV1Cutting off; to drive the output terminal Vo2Is maintained at a low potentialState of making the external drive circuit triode 3TV2The circuit is cut off; meanwhile, the 5J coil of the circuit relay is forced to be released in a power-off mode, the two pairs of normally open contacts of the relay 5J cut off the power supply of the leakage protector circuit and the alternating current power supply of the controlled alternating current load, the power-off state is maintained all the time, and the non-artificial power supply cannot be recovered, so that the power failure cannot occur, the running state of failure false protection is avoided, and the danger is avoided for a user. Therefore, safety protection can be obtained even when the device is abnormal.
4. When the signal input end V of the anti-loss control circuit chip RAHi1Or Vi2Detected secondary coil n of external zero sequence current transformer H3When the circuit or the sensing signal circuit is in short circuit or ground fault, the signal input end V is enabledi1Or Vi2The potential is extremely low and is lower than the underlay limit of two underlay protectors in the anti-loss control circuit chip RAH, the two underlay protectors are triggered to be latched in a closed state, and the driving output end V is enabled to beo1Output high potential, control external drive circuit triode 5TV1Cutting off; make the driving output end Vo2Output low potential to control external drive circuit triode 5TV2Cutting off; meanwhile, the 5J coil of the circuit relay is forced to be released in a power-off mode, the two pairs of normally open contacts of the relay 5J cut off the power supply of the leakage protector circuit and the alternating current power supply of the controlled alternating current load, the power-off state is maintained all the time, and the non-artificial power supply cannot be recovered, so that the power failure cannot occur, the running state of failure false protection is avoided, and the danger is avoided for a user. Therefore, safety protection can be obtained even when the device is abnormal.
5. When the external base setting end V of the anti-loss control circuit chip RAHmWhen high potential impact fault occurs, the reverse isolation action of the diode D32 does not impact the inner base setting end VfThe RAH of the anti-lost control circuit chip cannot be out of control due to the set reference limit; when the external base is set to the end VmWhen a short-circuit fault to the ground occurs, only the chip RAH of the anti-loss control circuit is triggered to be latched in a closed state, so that the driving output end V is enabledo1Output high potential, control external drive circuit triode 5TV1Cutting off; make the driving output end Vo2Output low potential to control external drive circuit triode 5TV2Cutting off; meanwhile, the 5J coil of the circuit relay is forced to be released in a power-off mode, the two pairs of normally open contacts of the relay 5J cut off the power supply of the leakage protector circuit and the alternating current power supply of the controlled alternating current load, the power-off state is maintained all the time, and the non-artificial power supply cannot be recovered, so that the power failure cannot occur, the running state of failure false protection is avoided, and the danger is avoided for a user. Therefore, safety protection can be obtained even when the device is abnormal.
6. Safety control input end V of anti-loss control circuit chip RAHkWhen short circuit to the ground occurs, the loss of control cannot be caused due to the reverse isolation action of the diode D11 and the diode D21 in the anti-loss control circuit chip RAH; when the safety control input end VkWhen high potential impact fault occurs, only the RAH of the trigger anti-loss control circuit chip is latched in a closed state, so that the drive output end V is enabledo1Output high potential, control external drive circuit triode 5TV1Cutting off; make the driving output end Vo2Output low potential to control external drive circuit triode 5TV2Cutting off; meanwhile, the 5J coil of the circuit relay is forced to be released in a power-off mode, the two pairs of normally open contacts of the relay 5J cut off the power supply of the leakage protector circuit and the alternating current power supply of the controlled alternating current load, the power-off state is maintained all the time, and the non-artificial power supply cannot be recovered, so that the power failure cannot occur, the running state of failure false protection is avoided, and the danger is avoided for a user. Therefore, safety protection can be obtained even when the device is abnormal.
7. When the drive output end V of the anti-loss control circuit chip RAHo1And a drive output Vo2In the event of short-circuit failure, or when a certain drive output Vo1Or Vo2When short circuit to ground or power supply anode short circuit fault occurs, the circuit system is not out of control because overcurrent and short circuit protection is provided in the output end of the common integrated operational amplifier and short circuit protection is provided in the output end of the direct current stabilized voltage power supply. Of course, there are also better technical measures to prevent runaway, which are difficult to disclose or disclose in a special integrated operational amplifier.
8. When open circuit or short circuit fault take place for direct current regulated power supply, only can force execution circuit relay 5J coil outage release certainly, relay 5J two pairs of normally open contacts cut off earth-leakage protector circuit power and controlled alternating current load's alternating current power supply to maintain the off-state all the time, non-artificial can not resume the circular telegram, therefore, can not take place out of control, avoid taking place the running state of inefficacy false guarantor, let the power consumer avoid danger. Therefore, safety protection can be obtained even when the device is abnormal.
9. If the contact resistance of the AC power supply side and/or the wiring terminal or the pin or the jack of the AC load side of the overheat-proof, failure-proof and leakage-proof protector is too large, the protector generates heat greatly when passing large current, the temperature rise is too high, the equivalent resistance value of the negative temperature coefficient thermistor 5NTC is reduced rapidly, and the safety control input end V of the leakage-proof circuit chip RAH is enabled to be too largekThe potential is rapidly increased to trigger two internal falling bottom protectors to be latched in a closed state, so that the driving output end V is enabledo1Output high potential, control external drive circuit triode 5TV1Cutting off; make the driving output end Vo2Output low potential to control external drive circuit triode 5TV2Cutting off; meanwhile, the 5J coil of the circuit relay is forced to be released in a power-off mode, the two pairs of normally open contacts of the relay 5J cut off the power supply of the leakage protector circuit and the alternating current power supply of the controlled alternating current load, the power-off state is maintained all the time, and the non-artificial power supply cannot be recovered, so that the power failure cannot occur, the running state of failure false protection is avoided, and the danger is avoided for a user. Thus, safety protection can be obtained even when the heater is very overheated. In the anti-failure and anti-leakage protector, because the negative temperature coefficient thermistor 5NTC is cancelled, the anti-overheating protection function is not provided, and if the working temperature rise of a wiring terminal or a pin or a jack on the AC power supply side or the AC load side is too high, a fire disaster can be caused.
Therefore, the invention not only can carry out safety protection control on the electric leakage or electric shock of the alternating current load during normal work, but also can carry out safety protection control timely and reliably when the alternating current load has common abnormal faults or is overheated very much, and forces the relay to cut off the alternating current power supply of the alternating current load, so that the alternating current load and a power consumer are placed in a safe state, thereby avoiding or preventing the electric shock accident when the self faults are invalid and ensuring the personal safety during power consumption. Therefore, the anti-leakage protector is an anti-leakage protector which can prevent overheating, failure and electric shock and has the advantages of intrinsic safety guarantee.

Claims (9)

1. The utility model provides a prevent losing accuse circuit chip RAH which characterized in that: the circuit comprises a first unit circuit, a second unit circuit, a reference positioning circuit (5), an anti-reverse constant voltage circuit (9) and a bottom-supporting high-locking circuit (8), wherein the reference positioning circuit and the anti-reverse constant voltage circuit are shared by the first unit circuit and the second unit circuit, the first unit circuit comprises a first bottom-falling protector (1) and a first contact latch (2), and the second unit circuit comprises a second contact latch (6) and a second bottom-falling protector (7); a signal input terminal V of the first unit circuiti1A monitoring input end of the first falling bottom protector (1) is connected with a trigger input end of the first contact latch (2), and a driving output end V of the first unit circuito1The output end of the first falling bottom protector (1) and the limit input end V of the first falling bottom protector (1) are connectedw1The output end of the first touch-based latch (2) is connected; a signal input terminal V of the second unit circuiti2A trigger input end of the second touch latch (6) is connected with a monitoring input end of the second falling bottom protector (7), and a driving output end V of the second unit circuito2The output end of the second falling bottom protector (7) and the limit input end V of the second falling bottom protector (7) are connectedw2The output end of the second touch-based latch (6) is connected; a security control input end V shared by the two unit circuitskThe input end of the bottom-supporting high-lock circuit (8) is connected, and two output ends of the bottom-supporting high-lock circuit (8) are respectively connected with the limiting input end V of the first bottom-falling protector (1)w1And a limit input end V of a second falling bottom protector (7)w2(ii) a An external base setting end V shared by the two unit circuitsmThe external input end of the reference positioning circuit (5) is connected, and the internal base setting end V of the reference positioning circuit (5)fTwo base position setting terminals connecting the first base latch (2) and the second base latch (6); the output voltage V of the anti-reverse constant voltage circuit (9) shared by the two unit circuits+0Three power input ends of the first unit circuit, the second unit circuit and the reference positioning circuit (5) are connected, and a power input end V of the anti-reverse constant voltage circuit (9)+1Voltage V of external DC power supply+1End, preventA power supply ground end GND of the anti-constant voltage circuit (9) is externally connected with a direct current power supply ground end GND; the first bottom falling protector (1) comprises an integrated operational amplifier A11, a voltage stabilizing diode WD11 or a constant current source IR11, the first base contact latch (2) comprises an integrated operational amplifier A12, resistors R11 and R12, the reference positioning circuit (5) comprises a resistor R31, a voltage stabilizing diode WD31 and a diode D32, the anti-reverse constant voltage circuit (9) comprises a diode D31, the bottom-supporting high-lock circuit (8) comprises diodes D11 and D21, the second base contact latch (6) comprises an integrated operational amplifier A22, resistors R21 and R22, and the second bottom falling protector (7) comprises an integrated operational amplifier A21, a voltage stabilizing diode 21 or a constant current source IR 21.
2. The chip RAH of claim 1, wherein: a signal input terminal V of the first unit circuiti1The inverting input (-) of the integrated operational amplifier A11, the non-inverting input (+) of the integrated operational amplifier A12 and one end of a resistor R12 are connected, the other end of the resistor R12 is connected with the output of the integrated operational amplifier A12 and the inner end of the resistor R11, the outer end of the resistor R11 and the cathode of the diode D11 are both connected with the anode of the zener diode WD11, the cathode of the zener diode WD11 is connected with the non-inverting input (+) of the integrated operational amplifier A11, and the output of the integrated operational amplifier A11 is the driving output V of the first unit circuito1(ii) a A signal input terminal V of the second unit circuiti2The output end of the integrated operational amplifier A21 is the driving output end V of the second unit circuit, and the output end V of the integrated operational amplifier A21 is connected to the non-inverting input end (+) of the integrated operational amplifier A22 and one end of the resistor R22, the other end of the resistor R22 is connected to the output end of the integrated operational amplifier A22 and the inner end of the resistor R21, the outer end of the resistor R21 and the cathode of the diode D21 are both connected to the anode of the zener diode WD21, the cathode of the zener diode WD21 is connected to the inverting input end (-) of the integrated operational amplifier A21, ando2(ii) a A security control input end V shared by the two unit circuitskThe anodes of the diodes D11 and D21 are connected, and the cathode of the diode D11 is connected with a limit input end Vw1The cathode of the diode D21 is connected with a limit input end Vw2(ii) a An external base setting end V shared by the two unit circuitsmConnecting diode D32 negativeThe anode of the diode D32 is connected with the two inverting input terminals (-) of the integrated operational amplifier A12 and the integrated operational amplifier A22, one end of the resistor R31 and the cathode of the voltage stabilizing diode WD31 as the internal base setting terminal V of the reference positioning circuit (5)fThe anode of the voltage stabilizing diode WD31 is connected with the power supply ground ends GND of the integrated operational amplifiers A11 and A12 and the integrated operational amplifiers A21 and A22 to be used as the power supply ground end GND of the whole anti-loss control circuit chip RAH, and the other end of the resistor R31 is connected with the cathode of the diode D31 and the power supply input ends (V) of the integrated operational amplifiers A11 and A12 and the integrated operational amplifiers A21 and A22+0) The anode of the diode D31 is used as the power input end V of the whole anti-loss control circuit chip RAH+1Voltage V of external DC power supply+1And (4) an end.
3. The chip RAH of claim 2, wherein: a diode D12, a diode D22 and an inverter F2 are connected in a supplementing mode; the anode of the diode D12 is connected with the output end of the integrated operational amplifier A11, and the cathode of the diode D12 is connected with the anode of the voltage-stabilizing diode WD11, the cathode of the diode D11 and the outer end of the resistor R11; the cathode of the diode D22 is connected with the anode of the voltage-stabilizing diode WD21, the cathode of the diode D21 and the outer end of the resistor R21, the anode of the diode D22 is connected with the output end of the NOT gate F2, and the input end of the NOT gate F2 is connected with the output end of the integrated operational amplifier A21.
4. The utility model provides a prevent that became invalid anticreep protector, includes zero sequence current transformer H, back level drive circuit and execution circuit, exchanges voltage reduction rectification direct current constant voltage power supply (18), its characterized in that: the circuit also comprises a core device RAH and a preceding stage detection circuit; the zero sequence current transformer H consists of an annular iron core and a primary coil n1、n2And a secondary coil n3The preceding stage detection circuit is composed of a secondary coil n of a zero sequence current transformer H3And a resistance 3R1、3R2、3R3The core device RAH adopts the chip RAH of claim 1, and the rear-stage driving circuit is composed of a resistor 3R7、3R8And a zener diode 3WD1、3WD2And triode 3TV1、3TV2The execution circuit is composed of a relay 3J and a diode 3D3Forming; two alternating current input ends (L) of the alternating current voltage reduction rectification direct current stabilized power supply (18)1～N1) Two AC lines L connected to an AC load side1、N1The DC voltage V output by the AC step-down rectification DC stabilized power supply (18)+2Higher than DC voltage V+1Primary coil n of the zero sequence current transformer H1、n2Is two AC power lines L penetrating into the annular iron core hole1、N1Secondary coil n of zero sequence current transformer H3Is a coil wound on a toroidal core thereof, the secondary coil n3One end of the input terminal is connected with the safety control input terminal V of the core device RAHkSecondary winding n3Another end of the resistor 3R2、3R3On the series connection point of (3R)3The other end is connected with a signal input end V of a core device RAHi1And Vi2Resistance 3R2The other end is connected with a power ground end GND and a resistor 3R1One end is connected with a direct current voltage V+1Resistance 3R1The other end is connected with the safety control input end V of the core device RAHkA driving output terminal V of the core device RAHo1Connecting resistor 3R7One terminal, resistor 3R7The other end is connected with a voltage stabilizing diode 3WD1Positive, zener diode 3WD1The negative electrode is connected with the triode 3TV1Base, triode 3TV1Emitter connected DC voltage V+2The driving output end V of the core device RAHo2Connecting resistor 3R8One terminal, resistor 3R8The other end is connected with a voltage stabilizing diode 3WD2Negative, zener diode 3WD2Triode 3TV is connected to positive pole2Base, triode 3TV2The emitter is connected with a power ground terminal GND, and the diode 3D in the execution circuit3Negative electrode connected triode 3TV1Collector, diode 3D3Triode 3TV is connected to positive pole2Collector, relay 3J coil both ends are parallelly connected at diode 3D3Two poles, two pairs of normally open contacts of the relay 3J are connected with an alternating current power supply (L, N) for controlling an alternating current load, QD is artificialAnd a start button is pressed to connect the alternating current voltage reduction rectification direct current stabilized power supply (18) and an alternating current power supply (L, N) of the controlled alternating current load.
5. The anti-failure and anti-leakage protector according to claim 4, which is improved into an anti-overheating and anti-failure and anti-leakage protector or an anti-overheating and anti-failure and anti-leakage protection plug and socket, and is characterized in that: an overheating protection circuit is added; the overheating protection circuit consists of a negative temperature coefficient thermistor 3NTC and a resistor 3R6The negative temperature coefficient thermistor 3NTC is used for monitoring the working temperature of a wiring terminal or a pin or a jack of an alternating current power supply side and/or an alternating current load side, one end of the negative temperature coefficient thermistor 3NTC is connected with a power supply ground end GND, and the other end of the negative temperature coefficient thermistor 3NTC is connected with a resistor 3R6One terminal, resistor 3R6The other end is connected with an external base setting end V of the core device RAHmAbove.
6. The utility model provides a prevent that became invalid anticreep protector, includes zero sequence current transformer H, execution circuit, exchanges step down rectification direct current constant voltage power supply (18), its characterized in that: the circuit also comprises a core device RAH and a preceding stage detection circuit; the zero sequence current transformer H consists of an annular iron core and a primary coil n1、n2And a secondary coil n3The preceding stage detection circuit is composed of a secondary coil n of a zero sequence current transformer H3And a resistance 4R1、4R2、4R3The core device RAH is the chip RAH of claim 1, and the executive circuit is composed of a relay 4J and a diode 4D2、4D3Forming; two alternating current input ends (L) of the alternating current voltage reduction rectification direct current stabilized power supply (18)1～N1) Two AC lines L connected to an AC load side1、N1The DC voltage V output by the AC step-down rectification DC stabilized power supply (18)+2Higher than DC voltage V+1Primary coil n of the zero sequence current transformer H1、n2Is two AC power lines L penetrating into the annular iron core hole1、N1Zero sequence ofSecondary coil n of current transformer H3Is a coil wound on a toroidal core thereof, the secondary coil n3One end of the input terminal is connected with the safety control input terminal V of the core device RAHkSecondary winding n3Another end of the resistor 4R2、4R3On the series connection point of (3), a resistor 4R3The other end is connected with a signal input end V of a core device RAHi1And Vi2Resistance 4R2The other end is connected with a power ground end GND and a resistor 4R1One end is connected with a direct current voltage V+1Resistance 4R1The other end is connected with the safety control input end V of the core device RAHkThe two ends of the relay 4J coil of the executive circuit are connected in parallel with the diode 4D3Bipolar, diode 4D2、4D3After the anodes are connected, the diode 4D2The cathode is connected with the drive output end V of the core device RAHo1Diode 4D3The cathode is connected with the drive output end V of the core device RAHo2Two pairs of normally open contacts of the relay 4J are connected with an alternating current power supply (L, N) for controlling an alternating current load, QD is a manual starting button, and the QD is pressed to connect an alternating current voltage reduction rectification direct current stabilized voltage power supply (18) and an alternating current power supply (L, N) for the controlled alternating current load.
7. The anti-failure and anti-leakage protector according to claim 6, which is improved into an anti-overheating and anti-failure and anti-leakage protector or an anti-overheating and anti-failure and anti-leakage protection plug and socket, and is characterized in that: an overheating protection circuit is added; the overheating protection circuit consists of a negative temperature coefficient thermistor 4NTC and a resistor 4R6The negative temperature coefficient thermistor 4NTC is used for monitoring the working temperature of a wiring terminal or a pin or a jack of an alternating current power supply side and/or an alternating current load side, one end of the negative temperature coefficient thermistor 4NTC is connected with a power supply ground end GND, and the other end of the negative temperature coefficient thermistor 4NTC is connected with a resistor 4R6One terminal, resistor 4R6The other end is connected with an external base setting end V of the core device RAHmAbove.
8. An anti-failure and anti-leakage protector comprises a zero sequence current transformer H, a rear drive circuit and an execution circuitAC voltage reduction rectification DC voltage-stabilized power supply (18), its characterized in that: the system also comprises a core device RAH, a preceding stage detection circuit and a safety control circuit; the zero sequence current transformer H consists of an annular iron core and a primary coil n1、n2And a secondary coil n3The preceding stage detection circuit is composed of a secondary coil n of a zero sequence current transformer H3And a resistor 5R2、5R3The core device RAH adopts an anti-loss control circuit chip RAH as claimed in claim 1, and the safety control circuit is composed of a resistor 5R only6The rear-stage drive circuit is composed of a resistor 5R7、5R8And a zener diode 5WD1、5WD2And triode 5TV1、5TV2The executive circuit is composed of a relay 5J and a diode 5D3Forming; two alternating current input ends (L) of the alternating current voltage reduction rectification direct current stabilized power supply (18)1～N1) Two AC lines L connected to an AC load side1、N1The DC voltage V output by the AC step-down rectification DC stabilized power supply (18)+2Higher than DC voltage V+1Primary coil n of the zero sequence current transformer H1、n2Is two AC power lines L penetrating into the annular iron core hole1、N1Secondary coil n of zero sequence current transformer H3Is a coil wound on a toroidal core thereof, the secondary coil n3One end of which is connected with an external base setting end V of the core device RAHmSecondary winding n3Another end of the resistor 5R2、5R3On the series connection point of (3), a resistor 5R3The other end is connected with a signal input end V of a core device RAHi1And Vi2Resistance 5R2The other end is connected with a power ground end GND and a resistor 5R6One end is connected with a direct current voltage V+2Resistance 5R6The other end is connected with the safety control input end V of the core device RAHkA driving output terminal V of the core device RAHo1Connecting resistor 5R7One terminal, resistor 5R7The other end is connected with a voltage stabilizing diode 5WD1Positive, zener diode 5WD1The negative electrode is connected with the triode 5TV1Base, triode 5TV1Emitter connected DC voltage V+2The driving output end V of the core device RAHo2Connecting resistor 5R8One terminal, resistor 5R8The other end is connected with a voltage stabilizing diode 5WD2Negative, zener diode 5WD2The anode is connected with a triode 5TV2Base, triode 5TV2The emitter is connected with a power ground terminal GND, and the diode 5D in the execution circuit3Negative electrode connected triode 5TV1Collector, diode 5D3The anode is connected with a triode 5TV2Collector, relay 5J coil both ends are parallelly connected at diode 5D3Two poles of the earth, two pairs of normally open contacts of the relay 5J are connected with an alternating current power supply (L, N) for controlling an alternating current load, QD is a manual starting button, and the QD is connected with an alternating current voltage reduction rectification direct current stabilized voltage power supply (18) and an alternating current power supply (L, N) for the controlled alternating current load after being pressed down.
9. The anti-failure and anti-leakage protector according to claim 8, which is improved into an anti-overheating and anti-failure and anti-leakage protector or an anti-overheating and anti-failure and anti-leakage protection plug and socket, and is characterized in that: an overheating protection circuit is added; the overheat protection circuit is arranged on the original resistor 5R6The two ends of the thermistor are connected with a negative temperature coefficient thermistor 5NTC in parallel, the negative temperature coefficient thermistor 5NTC is used for monitoring the working temperature of a wiring terminal or a pin or a jack of an alternating current power supply side or an alternating current load side, and the negative temperature coefficient thermistor 5NTC and a resistor 5R6After parallel connection, one end of the parallel connection is connected with a safety control input end V of the core device RAHkThe other end of the parallel connection is connected to a direct current voltage V+2Above.
CN201610508436.0A 2016-06-22 2016-06-22 Anti-failure circuit chip and anti-failure anti-leakage protector Active CN106058802B (en)

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CN107834310A (en) * 2017-11-10 2018-03-23 深圳市华思通科技有限公司 A kind of antioverloading overtemperature prote socket
CN109673062A (en) * 2017-11-21 2019-04-23 刘少华 A kind of electric blanket of anti-thermal control failure
CN108322945B (en) * 2018-03-29 2021-04-30 刘少华 Full-effect out-of-control-preventing full-real safety electric blanket

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CN102111137A (en) * 2010-04-09 2011-06-29 刘圣平 Safe control time-base circuit
CN204333911U (en) * 2014-03-20 2015-05-13 刘圣平 Comprehensive security universal control circuit module and comprehensive security earth leakage protective device
CN105449635A (en) * 2014-05-28 2016-03-30 益而益(集团)有限公司 Electric leakage protector with overtemperature protection device
CN205846697U (en) * 2016-06-22 2016-12-28 刘圣平 A kind of anti-circuit chip out of control and anti-inefficacy electricity-leakage-proof protectors

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CN102111137A (en) * 2010-04-09 2011-06-29 刘圣平 Safe control time-base circuit
CN204333911U (en) * 2014-03-20 2015-05-13 刘圣平 Comprehensive security universal control circuit module and comprehensive security earth leakage protective device
CN105449635A (en) * 2014-05-28 2016-03-30 益而益(集团)有限公司 Electric leakage protector with overtemperature protection device
CN205846697U (en) * 2016-06-22 2016-12-28 刘圣平 A kind of anti-circuit chip out of control and anti-inefficacy electricity-leakage-proof protectors

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