WO1996007239A1 - Dispositif de commutation de courant alternatif a deux fils - Google Patents

Dispositif de commutation de courant alternatif a deux fils Download PDF

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Publication number
WO1996007239A1
WO1996007239A1 PCT/CN1995/000070 CN9500070W WO9607239A1 WO 1996007239 A1 WO1996007239 A1 WO 1996007239A1 CN 9500070 W CN9500070 W CN 9500070W WO 9607239 A1 WO9607239 A1 WO 9607239A1
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WO
WIPO (PCT)
Prior art keywords
circuit
main
control
switching device
switch assembly
Prior art date
Application number
PCT/CN1995/000070
Other languages
English (en)
Chinese (zh)
Inventor
Tianlu Weng
Original Assignee
Tianlu Weng
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN94112284A external-priority patent/CN1054950C/zh
Priority claimed from CN94114032A external-priority patent/CN1053538C/zh
Application filed by Tianlu Weng filed Critical Tianlu Weng
Priority to AU32518/95A priority Critical patent/AU3251895A/en
Publication of WO1996007239A1 publication Critical patent/WO1996007239A1/fr

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
    • H03K17/6871—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the output circuit comprising more than one controlled field-effect transistor
    • H03K17/6874—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the output circuit comprising more than one controlled field-effect transistor in a symmetrical configuration
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/68—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors specially adapted for switching ac currents or voltages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
    • H03K17/725—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region for ac voltages or currents
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
    • H03K17/79—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar semiconductor switches with more than two PN-junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region

Definitions

  • the invention relates to an AC two-wire switchgear, and more particularly to an AC two-wire switchgear with a self-generated power source transformer.
  • This AC two-wire switchgear has only two connection terminals. It is connected to the AC circuit in series, which is suitable for controlling the on and off of the load. Background technique
  • the second method is to use a thyristor in the main circuit switch component, which is in a non-full-conduction state and depends on the thyristor current. A section of the cut-off area after the zero crossing generates self-generated power, so this method is difficult to avoid distortion of the load waveform.
  • the above two methods have an additional on-state voltage drop at least equal to the self-generated voltage. If the self-generated power supply voltage is 5V, the additional on-state voltage drop is several times the inherent on-state voltage drop. Therefore, the additional off-state current, especially the additional on-state voltage drop The large increase of the AC two-wire switchgear of the prior art has been greatly restrained in application.
  • the AC two-wire switching device includes:
  • a self-generated power circuit connected to a power source end of a sub-control circuit and used to provide working power to the control circuit.
  • the self-generated power circuit includes a rectifier circuit, a voltage stabilization circuit, a main loop off-state power supply circuit, and at least one transformer.
  • the transformer includes At least one primary winding and at least one secondary winding, the primary winding is connected in series with the bidirectional main circuit switch assembly, and the secondary winding is connected with an input terminal of the rectifier circuit.
  • 13 to 32 are circuit block diagrams showing a first embodiment to a twentieth embodiment of an AC two-wire switching device according to the present invention.
  • 60 and 61 are circuit diagrams showing two forms of the twentieth embodiment of the present invention, respectively.
  • each reference numeral indicates the following: 1-AC power, 2-Load, 3 and 3 '-Two connection terminals of the AC two-wire switch, 4-Bidirectional main circuit switch assembly , 5-Bidirectional Current Stabilizing Component, 6-Rectifier Voltage Regulator, 6'- Second Rectifier Voltage Regulator, 7-Control Circuit, 7 'Second Control Circuit, 8-Rectifier Circuit, 9-Voltage Regulator Circuit, 10- Unidirectional current stabilization component, 11-mechanical relay coil, 12-mechanical relay normally open contact, H1, H2-transformer, L1, L2, L3, L3 ', L4, L5-transformer coil (where L2, L4 also Called the first primary winding, L1 is also called the second primary winding, L3, L5 are also called the first secondary winding, 6/07239
  • L3 is also called the second secondary winding
  • R-resistor Z-impedance
  • Z1-first impedance Z2-second impedance
  • D-diode D1-first diode
  • D2- second diode Tube BR-bridge rectifier circuit.
  • Figs. 1 to 12 are schematic diagrams showing various main circuit switch assemblies suitable for the AC two-wire switchgear of the present invention, respectively.
  • the bidirectional main circuit switch assembly shown in FIG. 1 is a bidirectional thyristor, which has two main electrode terminals T1 and T2 and a control terminal G1, and a control signal is input between G1 and T1.
  • this component is composed of two bidirectional thyristors and a resistor. It has two main electrode terminals T1 and T2 and a control terminal G1. Control signals are input between G1 and T1.
  • this group of components consists of a light-emitting diode and a bidirectional photo-thyristor.
  • the device has two main electrode terminals T1 and T2 and two control terminals G1 and G2. Control signals are input between G1 and G2.
  • the device consists of two V-groove metal-oxide-insulated VMOS field-effect transistors (VMOS).
  • the component consists of two bipolar transistors.
  • the device consists of two insulated gate bipolar transistors (IGBTs).
  • IGBTs insulated gate bipolar transistors
  • FIGS. 4 to 6 there are two main electrode terminals T1 and T2 and two control terminals G1 and G2, and control signals are input between G1 and G2.
  • the component is composed of a unidirectional interstitial transistor and four diodes.
  • the component consists of a V-groove metal oxide insulated gate field effect transistor and four diodes.
  • the component consists of a bipolar transistor and four diodes.
  • the component consists of an insulated gate bipolar transistor and four diodes.
  • this component is composed of two unidirectional transistors, with two main electrode terminals T1 and T2 and two control terminals G1 and G2. This component requires two synchronized control signals from G1 and T1, respectively. And input between G2 and T2.
  • the bidirectional main circuit switch assembly is composed of a relay coil 11 and a normally open contact 12. A control signal is applied to both ends of the relay coil 11.
  • FIG. 13 to 32 are circuit block diagrams showing the first to twentieth embodiments of the AC two-wire switching device according to the present invention, respectively.
  • FIG. 13 it is a circuit block diagram showing a first embodiment of the present invention.
  • terminals 3 and 3 ' are two connection terminals of an AC two-wire switching device, and are connected to an AC circuit composed of an AC power source 1 and a load 2.
  • the self-generating power supply is composed of a transformer HI and a rectification and voltage stabilization circuit 6, where HI has three coils L1, L2 and L3, and the coil L1 and the impedance Z are connected in series to form a main loop off-state power supply circuit, which is connected to terminals 3 and 6/07239
  • one end of the wire L2 is connected to the main electrode T2 (or Tl) of the bidirectional main circuit switch assembly 4, the other end of the coil L2 and the main electrode T1 (or T2) are connected to terminals 3 and 3', and the coil L3 is connected to
  • the output voltage of the rectifying and stabilizing circuit 6 is the self-generated power supply voltage, and is used as the power source of the control circuit 7. Therefore, the output terminal of the rectification and stabilization circuit 6 is connected to the power supply terminal of the control circuit 7.
  • the output terminal of the control circuit 7 is connected to the control poles G1 and G2 of the bidirectional main circuit switch assembly 4.
  • the control signals output by the control circuit 7 control the on and off of the bidirectional main circuit switch assembly 4 through the control electrodes G1 and G2.
  • the bidirectional main circuit switch assembly 4 can use any one of FIG. 1 to FIG. 10. However, since there is no G2 terminal in FIG. 1, if the bidirectional main circuit switch assembly 4 of FIG. 1 is used, the The lead connected to the G2 terminal is connected to the T1 terminal.
  • the self-generated power has the following two generation methods: (1) When the bidirectional main circuit switch assembly is turned off, the coil L1 in the transformer HI forms a loop with the AC power source 1 through the impedance Z and the load 2, and is online ⁇ L1 There is a certain current flowing in this current. This current is the additional off-state current. It is now used as the primary input current of the transformer HI. It induces a voltage on the secondary line ⁇ L3. This voltage is rectified and stabilized as a self-generating power supply.
  • the coil L2 When the coil L2 has only the off-state leakage current of the transistor or thyristor, its effect can be ignored; (2) When the bidirectional main circuit switch component is turned on, the working current of the load 2 flows in the coil L2, which is induced on the line L3 After the voltage is also passed through the rectification and stabilization circuit 6, as a self-generated power source, at this time, from the perspective of the current transformer HI, the line ⁇ L1 and the line diagram L2 are equivalent to two primary windings connected in parallel with different impedances, but the coil L1 The resistance in one way is relatively large. The actual current flowing in the coil L1 is very small, and its effect can be ignored. At this time, the additional on-state voltage drop is the voltage on the coil L2.
  • the self-generated power supply solves the power supply of the internal control circuit 7 of the two-wire switching device, so that the on / off control of the load 2 can be performed according to the control mode of the control circuit 7.
  • Fig. 14 is a circuit block diagram showing a second embodiment of the present invention.
  • terminals 3 and 3 are the two connection terminals of an AC two-wire switchgear. They are connected to an AC circuit composed of AC power supply 1 and load 2.
  • the self-generated power is composed of transformer H2, rectifier circuit 8, and voltage regulator circuit 9.
  • the diode D and resistor R where the transformer H2 has two coils L4 and L5, one end of the line ⁇ L4 is connected to the main electrode T2 of the bidirectional main circuit switch assembly 4, the line diagram L4 6/07239
  • the other end is connected to terminal 3 and one end of a series circuit composed of a resistor R and a diode D (the series circuit constitutes a main loop off-state power supply circuit), and the other end of the series circuit is connected to an output end of a rectifier circuit 8 and a voltage stabilization circuit.
  • One input terminal of 9 is connected to all three, and the other output terminal of the rectifier circuit 8 is connected to the common contact of the voltage stabilization circuit 9, the common contact of the control circuit 7, the main electrode T1 and the terminal 3 ′.
  • the coil L5 is connected to the input terminal of the rectifier circuit 8.
  • the output voltage of the voltage stabilization circuit 9 is the self-generated power voltage and is used as the power source of the control circuit 7.
  • the output terminal of the voltage stabilization circuit 9 is connected to the power terminal of the control circuit 7.
  • the output terminal of the control circuit 7 is connected to the control pole G1 of the bidirectional main circuit switch assembly 4, and the control signal for the common contact changes through the control pole G1 to control the on and off of the bidirectional main circuit switch assembly 4.
  • the two-way main circuit switch assembly 4 may use any one of Figs. 1, 7 to 10.
  • the circuit of FIG. 1 there are two methods for generating the self-generating power supply: (1) When the bidirectional main circuit switch assembly 4 is turned off, the AC power supply 1 forms a loop through the load 2 and the two output terminals of the diode D, the resistor R, and the rectifier circuit 8. A DC voltage is generated at the output of the rectifier circuit 8. This voltage is used as a self-generating power after the regulator circuit 9.
  • the bidirectional main circuit switch component 4 When the bidirectional main circuit switch component 4 is turned on, the working current of load 2 flows through line ⁇ L4. The current is used as the primary input current of the transformer H2, and then the induced voltage on the secondary line ⁇ L5 passes through the rectifier circuit 8 and the voltage stabilization circuit 9 as a self-generated power source.
  • the additional on-state voltage drop is the voltage on the coil L4, and the additional off-state current is a half-wave rectified current flowing through the diode D.
  • circuits shown in FIGS. 15 to 33 are derived from the circuits shown in FIGS. 13 and 14 after being transformed or improved, they have a lot in common with each other. Therefore, the following discussion Before the specific circuits of the various embodiments, first, a comprehensive overview of the same points and differences between the circuit block diagrams of FIG. 15 to FIG. 33 is given.
  • the self-generating power source is composed of impedance Z or a bidirectional current stabilizing component 5, a transformer HI, and a rectifying and stabilizing circuit 6, where HI has three coils L1, L2, and L3, and line ⁇ L1 passes
  • the bidirectional current stabilization component 5 or impedance Z is connected to terminals 3 and 3 ', and the line ⁇ L2 is connected to terminals 3 and 3' through the two main electrodes T1 and T2 of the bidirectional main circuit switch component 4 or the normally open contact 12 of the mechanical relay.
  • the coil L3 is connected to the input terminal of the rectification and stabilization circuit 6.
  • the output terminal of the rectification and stabilization circuit 6 is connected to the power supply terminal of the control circuit 7.
  • the output of the control circuit 7 is connected to the two-way main circuit.
  • the control signal output by the control circuit 7 controls the two-way main circuit through G1 and G2.
  • the on-off and on-off of the circuit switch assembly or the control voltage output by the control circuit 7 controls the closing and breaking of the normally open contact 12 through the coil 11 of the mechanical relay.
  • the bidirectional main circuit switch assembly 4 in Fig. 15 can use any one of Figs. 1 to 11. Since there is no G2 terminal in Fig. 1, the lead connected to the G2 terminal should be connected to the T1 terminal during use. If the bidirectional main circuit switch assembly of FIG. 11 is used, it should be changed to that shown in FIG. 33, and the coil L3 ', the second rectification and stabilization circuit 6' and the second control circuit 7 'are added, and the outputs of the two control circuits 7 and 7' are added.
  • the terminals are respectively connected to G1, T1 and G2, T2, and two synchronous control signals are used to control the on and off of the bidirectional main circuit switch assembly 4.
  • the self-generating power supply includes a transformer H2, a rectifier circuit 8 and a voltage regulator circuit 9 or a rectifier voltage regulator circuit 6, of which two transformers H2 have two Line ⁇ L4 and L5, line ⁇ L4 are connected to terminals 3 and 3 'through the two main electrodes T1 and T2 of the bidirectional main circuit switch assembly 4 or the normally open contact 12 of the mechanical relay, where T1 and 3' are connected, and coil L5 is connected To the input of the rectifier circuit 8.
  • the output terminal of the rectifier circuit 8 is connected to the input terminal of the voltage stabilization circuit 9.
  • the output voltage of the voltage stabilization circuit 9 or the rectification voltage stabilization circuit 6 is the self-generated power voltage and is used as the power supply of the control circuit 7. Therefore, the voltage stabilization circuit 9 or rectification
  • the output terminal of the voltage stabilization circuit 6 is connected to the power supply terminal of the control circuit 7.
  • the output terminal of the control circuit 7 is connected to the control terminals G1 and G2 of the bidirectional main circuit switch assembly 4 or the control terminals G1 and the main electrode terminal T1 or the line 11 of the mechanical relay.
  • the control signals output by the control circuit 7 pass through G1 and G2. Or G1 and T1 control the on and off of the bidirectional main circuit switch assembly 4 or the control voltage output by the control circuit 7 controls the closing and breaking of the normally open contact 12 through the coil 11 of the mechanical relay.
  • FIG. 20 is connected to the starting terminal S through a unidirectional current stabilization component 10; and FIG. 21 is an output terminal connected to a bridge rectifier circuit BR.
  • the other output terminal of the current-flow circuit BR is connected to terminal G2.
  • the two input terminals of the bridge rectifier circuit BR are connected to terminals 3 and 3 'through an impedance Z;
  • FIG. 22 is connected to one through a unidirectional current stabilization component 10
  • One output terminal of the bridge rectifier circuit BR, the other output terminal of the bridge rectifier circuit BR is connected to terminal G2, and the two input terminals of the bridge rectifier circuit BR are connected to terminals 3 and 3 ', respectively;
  • FIG. 23 and FIG. 24 is connected to the negative electrode of the first diode D1.
  • the positive electrode of the first diode D1 is connected to the negative electrode of the second diode D2 and one end of the nozzle reactance Z, and the other end of the nozzle reactance Z is connected to the terminal 3.
  • the anode of the two diodes D2 is connected to the terminal 3 '.
  • the 32 is connected to the common contact of the control circuit 7 and the control terminal G2 of the bidirectional main circuit switch assembly 4, and the other output terminal of the rectification and stabilization circuit 6 is connected to the first impedance Z1 It is connected to one end of the second impedance Z2, the other end of the first impedance Z1 is connected to the main electrode terminal T2, and the other end of the second impedance Z2 is connected to the main electrode terminal T1.
  • the two output terminals of the rectifier circuit 8 are also connected to different components or components, that is, the two output terminals of the rectifier circuit 8. Is connected to terminals 3 and 3 'through resistor R and diode D; Figure 28 is connected to terminals 3 and 3' through a unidirectional current stabilization component 10; Figure 29 is one of the terminals and the negative electrode of the first diode D1 The other terminal is connected to the anode of the second diode D2 and the terminal 3 ', the anode of the first diode D1 is connected to the anode of the second diode D2 and one end of the impedance Z, and the other end of the impedance Z is connected to Terminal 3; Figure 30 is two output terminals respectively connected to a bridge rectifier circuit BR, and the two input terminals of the bridge rectifier circuit BR are connected to terminals 3 and 3 'through impedance Z; Figure 31 is through a unidirectional
  • the above-mentioned components or components related to the output terminal of the rectification circuit 8 or the rectification and stabilization circuit 6 or the bridge rectification circuit constitute a part of the self-generated power of each scheme.
  • the bidirectional main loop switch assembly 4 of FIGS. 16, 19 and 24 may use any one of FIGS. 4 to 10.
  • the bidirectional main circuit switch assembly 4 of FIGS. 17 and 20 may use any one of FIGS. 7 to 10.
  • the bidirectional main circuit switch assembly 4 of FIG. 18 and FIG. 23 can use any one of FIGS. 1 to 3, but when using the assembly of FIG. 3, it is necessary to connect G2 to Tl.
  • the bidirectional main circuit switch assembly 4 of FIGS. 21 and 22 may use any one of FIGS. 3 to 10.
  • the bidirectional main circuit switch assembly 4 of FIG. 32 may use any one of FIGS. 4 to 10.
  • a unidirectional conductive diode is between the control electrode G2 and the main electrode T1; in FIGS. 4 to In the bidirectional main circuit switch assembly of FIG. 6, between the control electrode G2 and the main electrode T1 is the source and drain of the VMOS tube with no forward bias voltage on the gate or the emitter of the bipolar transistor with no injected current at the base.
  • the collector also has a unidirectional conductive path);
  • Figures 17 and 20 are formed by the AC power supply 1 through the load 2, the bridge rectifier circuit BR, the resistor R, or the unidirectional current stabilization component 10 in the bidirectional main circuit switch assembly 4
  • Figure 18, Figure 27 and Figure 28 are formed by AC power supply 1 through load 2, unidirectional current stabilizing component 10 or diode D and resistor R
  • Figure 21, Figure 22, Figure 30 and Figure 31 are powered by AC power supply 1 formed by load 2
  • 23 and FIG. 29 are formed by the AC power source 1 through the load 2, the impedance Z, and the first diode D1.
  • the role of the second diode D2 is to provide an AC path for the capacitive impedance;
  • the power source 1 is formed by the load 2, the reactance Z, the first diode D1, and the unidirectional conductive path between the control electrode G2 and the main electrode T1 of the bidirectional main circuit switch assembly 4.
  • a DC voltage is formed directly at the output terminal of the rectification and stabilization circuit 6. That is, during the positive half cycle or the negative half cycle of the AC power, the AC voltage passes the first impedance Z1 and the control electrode G2 of the bidirectional main circuit switch assembly 4 and The path between the main electrodes T1, or the second nozzle reactance Z2 and the path between the control electrode G2 of the bidirectional main circuit switch assembly 4 and the main electrode T2 alternately supplies power to the control circuit 7.
  • the additional on-state voltage drop when the bidirectional main circuit switch assembly 4 is turned on or the normally open contact 12 of the mechanical relay is closed is AC voltage drop across coil L4.
  • the additional off-state current when the two-way main circuit switch assembly is off or the normally open contact 12 of the mechanical relay is open.
  • the self-generating power supply solves the power supply of the internal control circuit 7 of the two-wire switching device, so that the on / off control of the load 2 can be performed according to the control mode of the control circuit 7.
  • the parameters of the transformers HI and H2 are determined according to the design method of the current transformer for protection.
  • the coil L1 and the coil L2 are two primary windings, and the coil L3 is a secondary winding.
  • the primary input current of line ⁇ L2 is the working current of load 2.
  • the primary input current of line ⁇ L1 can be changed by changing the nature and size of the impedance Z or the steady-state value of the bidirectional steady-current component 5. If the two-wire switchgear has the same requirements for self-generated power in both on and off states, the number of amp turns of coil L1 should be the same as the number of amp turns of coil L2.
  • the size of the secondary output voltage on the coil L3 should be determined according to the voltage and capacity requirements of the self-generated power source and the form of the rectification and voltage stabilization circuit.
  • the coil L4 is the primary winding
  • the coil L5 is the secondary winding.
  • the primary input current of line ⁇ L4 is the operating current of load 2.
  • the method for determining the magnitude of the secondary output voltage on line ⁇ L5 is the same as the line 3L3 described above, and it is no longer important.
  • Fig. 34 to Fig. 37 are circuit diagrams showing several different forms of the first embodiment of the present invention shown in Fig. 13, respectively.
  • this circuit is a two-wire temperature-controlled switchgear.
  • the AC power source 1 is 220V, 50HZ
  • the load 2 is a heater
  • the current is 1A.
  • the capacitance C11 is equivalent to the impedance Z of FIG. 13.
  • the two-way main circuit switch assembly 4 uses the form of FIG. 3.
  • the rectification and stabilization circuit 6 is composed of four diodes D11 to D14 and the integrated circuit IC11 and its peripheral components.
  • the control circuit 7 is composed of an integrated circuit IC12 and its peripheral components, of which R13 is a slowly changing type negative temperature coefficient thermistor.
  • R13 is a slowly changing type negative temperature coefficient thermistor.
  • the third pin of the integrated circuit IC12 outputs a high level, so that the bidirectional photoelectric thyristor in the photocoupler TR11 is turned on, and the heater is turned on.
  • the third pin of the integrated circuit IC12 outputs a low level, so that the bidirectional photo-thyristor is turned off and the heater is powered off.
  • the additional on-state voltage drop is 0.4 volts
  • the additional off-state current is 5 milliamps, which are all doubled compared to the prior art.
  • the sensor here, the thermistor
  • the sensor is electrically isolated from the AC power source. See Figure 35.
  • This is a high-current two-wire protective switchgear that relies on a button to control on / off. Its characteristic is that there is no additional off-state current when load 2 is powered off.
  • the AC power supply voltage used is 100 volts to 250 volts, the frequency is 50 Hz, and the load current varies from 5 amps to 25 amps.
  • the transformer H31 corresponds to HI in FIG.
  • the rectifier circuit consists of four diodes D31 to D34.
  • the voltage stabilization circuit consists of a resistor R31, a voltage regulator DZ31, and a capacitor C32.
  • the two-way main circuit switch assembly 4 uses the form of FIG. 2.
  • Control circuit 7 consists of push-button switches K31 and K32, resistors R32 to R34, and thyristor ⁇ SCR31. The specific working process is as follows: After pressing the switch K31, the self-generating power source relying on the current in the line L31 triggers the transistor BCR31 directly through the nozzle R32, which causes the BCR31 and BCR32 to be turned on, and the load 2 is turned on.
  • the self-generating The power supply is maintained by the load current in the coil L32, and the button switch K31 does not need to be turned on.
  • the switch needs to be disconnected, as long as the switch K32 is pressed, the self-generated power is shorted, the thyristors BCR31 and BCR32 are turned off, and the load 2 is powered off.
  • the load current exceeds the rated value (26 amps)
  • the output voltage of the rectifier circuit increases.
  • the thyristor SCR31 is turned on, thereby turning off the thyristors BCR31 and BCR32. Complete the overload protection process.
  • this is a solid state relay circuit that uses pulses to trigger on / off. With overload protection function and zero-crossing on-off function. Allowable AC power supply voltage variation range is
  • the control circuit 7 is composed of three parts: a circuit composed of a photocoupler LEC61, a transistor BG63, BG64, BG65, BG66 and its peripheral components to complete the pulse-triggered zero-crossing conduction function; a photocoupler LEC62, a transistor BG62, and a nozzle R62, The circuit composed of R63 completes the pulse-triggered zero-crossing breaking function; the circuit composed of transistor SCR61, transistor BG61, resistors R613, R614, and R615 completes the overload protection function.
  • the two-way main circuit switch assembly 4 uses the form of FIG. 1.
  • the working process of the circuit is as follows; when the bidirectional thyristor BCR61 is turned off, the zero crossing of the sinusoidal ripple voltage output by the rectifier circuit basically corresponds to the zero crossing of the AC power supply voltage.
  • This sinusoidal ripple voltage is connected to the base of the transistor BG63 through the resistor R64 and Between the emitters, the transistor BG63 forms a pulsating base current.
  • a pulse greater than 10 milliseconds is applied to the input terminals Y and Y 'of the photocoupler LEC61, the internal phototransistor is turned on, and the self-generated power passes through this photo
  • the transistor and resistor R65 are added to the collector of transistor BG63 and the base of transistor BG65.
  • the base current of transistor BG65 depends on the conduction of transistor BG63. Therefore, only at the zero crossing of the sinusoidal ripple voltage output by the rectifier circuit Only near can the transistor BG63 be turned off, thereby turning on the transistors BG65 and BG64, triggering the bidirectional thyristor BCR61 to be turned on, and the load 2 is energized.
  • the transistor BG64 After the transistor BG64 is turned on, its collector injects a base current to the transistor BG66 through the resistor R69, so that the transistor BG66 is turned on. Therefore, after the pulses on the Y and Y 'terminals disappear, the transistor BG64 remains on, causing the load 2 Continuous power up.
  • this circuit is a three-phase protective switching device that uses two push-button switches to control on / off. It is an example of a two-wire switching device applied to a three-phase circuit.
  • Power supply 1 is three-phase 380 volts, 50 Hz.
  • Load 2 is a J32-2 three-phase motor M. The characteristic of this circuit is that after removing the three-phase load 2, there is no electrical path between the three phases.
  • the bidirectional main circuit switch assembly 4 uses the form of FIG. 1. Because this circuit is relatively simple, its main part is very similar to the previous content, only for the following description: the transformer H 71 has three secondary windings L73 7 and L75, and its output voltage is rectified and stabilized to form three self-generated power sources.
  • the triacs BCR71, BCR72 and BCR73 are triggered by resistors R72, R7 and R76 respectively.
  • the thyristor BCR71 When the thyristor BCR71 is turned off, after the switch K71 is pressed, the coil L71 forms a loop through the motor and the overvoltage protection component capacitor C710, the nozzle R717 and the B phase, and at the same time forms a loop through the motor M and the capacitor C711, the resistor R718 and the C phase, thereby Relying on the current in line ⁇ L71 6/07239
  • the three self-generated power sources are established by relying on the phase A current flowing through the coil L72.
  • Transformers H72 and H73 only serve as overload protection.
  • the overload signals on the secondary windings L77 and L79 trigger directional thyristors SCR72 and SCR73, respectively, after rectification, voltage division, and delay.
  • the thyristor SCR71 is triggered by the process and Thyristors SCR72 and SCR73 are similar, so when the motor M stalls or the current of any phase is too large, the three-phase main circuit can be shut down.
  • This circuit is easy to add phase failure protection and overheating protection, and it is also easy to change to a sensor to control the three-phase load.
  • FIG. 38 to 40 are circuit diagrams showing different forms of the second embodiment of the present invention shown in FIG. 14, respectively. See Figure 38.
  • This is a two-wire high-frequency oscillating proximity switch device that directly controls load 2 with overload protection.
  • the usable range of power supply voltage 1 is 6/07239
  • the coil L21 in the transformer H21 corresponds to the line ⁇ L4 in FIG. 14
  • the line ⁇ L22 corresponds to the line ⁇ L5 in the figure U
  • the line ⁇ L23 is a new secondary winding for overload protection.
  • the diode D25 and the nozzle R22 are equivalent to the diode D and the resistor R in FIG. 14.
  • the rectifier circuit 8 is composed of four diodes D21 to D24.
  • Voltage regulator circuit 9 consists of resistor R23, voltage regulator DZ21, and capacitor C25.
  • the control circuit 7 is composed of 3 ⁇ 4-phase devices F21 to F26, transistors BG21, BG22, BG23, line L23 and its peripheral components.
  • the two-way main circuit switch assembly 4 uses the form of FIG. 1.
  • this proximity switch When the metal detector is far away from the sensor head coil L24, the high-frequency oscillator composed of the phase detectors F21, F22, and F23 oscillates, and the signal output by the fork phase detector F26 cannot make the transistors BG22, BG23 When it is turned on, the BCR21 of the transistor is turned off, and the load 2 is in a power-off state.
  • the high-frequency oscillator stops vibrating, and the output signal of the inverter F26 turns on the transistors BG22 and BG23 through the transistor BG21, so that the bidirectional transistor BCR21 turns on. ON, load 2 is energized.
  • the additional on-state voltage drop is 0.2 volts when the load current is 2.5 amps, and the average value of the additional off-state current is 10 mA when the power supply voltage is 220 volts.
  • the overload protection circuit operates, and the automatic reset time is about 30 seconds. It can be re-set by changing R25.
  • this is a two-wire protective switchgear that should be in the audio and super audio range. It relies on a button to control the on and off of the load.
  • the power frequency is 3 kHz and 25 kHz.
  • the waveform is a two-way square wave with an amplitude of 100 volts.
  • Load 2 is resistive and the magnitude of the load current is 1 amp.
  • the transformer H41 is equivalent to the transformer H2 in FIG. 14, and the diode D49 and the resistor R45 are equivalent to the diode D and the nozzle R in FIG. 8. Compared with FIG.
  • the series circuit is connected to the regulator DZ41, not to the output terminal of the rectifier circuit 8.
  • the rectifying circuit 8 is composed of diodes D41 to D44.
  • the voltage stabilization circuit 9 is composed of a resistor R41, a voltage regulator DZ41, and a capacitor C41.
  • the control circuit 7 is composed of switches K41, K42, electricity R42, R43, R44, and thyristor SCR41.
  • the bidirectional main circuit switch assembly uses the form of FIG. 9.
  • the circuit in Figure 39 is very similar to the circuit in Figure 35, the same / 07239
  • the first point is that when the transistors BG41 and BG42 are turned off, after pressing the switch K41, the self-generated power is established by the AC power source 1 through the diode D49 and the resistor R45 on the voltage regulator DZ41
  • the second point is the use of a composite bipolar transistor in the bidirectional main circuit switch assembly. When the load 2 is energized, the self-generated power injects a base current to the transistor BG41 through the resistor R42, causing the transistors BG41 and BG42 to be turned on.
  • L42 250 turns, wire diameter 0. 13 mm (L42 plus metal screen layer) H41 (at 25 kHz) MX- 2000 ferrite ring core 10 X 6 X 5
  • this is a two-wire protective switchgear for a single-phase compression pump motor.
  • the power supply voltage used ranges from 100 volts to 250 volts and the frequency is 50 Hz.
  • Load 2 is a 150 watt single-phase compression pump motor M.
  • the lines 51L51 and L52 in the transformer H51 are equivalent to L4 and L5 in Figure 14, and the coil L53 is a secondary winding provided to establish an auxiliary self-generated power source.
  • the diode D55 and the resistor R512 are equivalent to the diode D and the resistor R in FIG. 14.
  • the rectifier circuit 8 is composed of diodes D51 to D54.
  • the voltage stabilization circuit 9 is composed of a resistor R51, a voltage regulator DZ51, and a capacitor C51.
  • the control circuit 7 is mainly composed of transistors BG51, BG52, BG53, BG54 thyristors, SCR51 and its peripheral components. Two-way main circuit is open 6/07239
  • the control circuit 7 has functions such as power failure protection, starting overcurrent protection, running overcurrent protection, and automatic reset.
  • the working process is as follows: When the AC power supply 1 is connected, the AC power supply 1 establishes a self-generating power source on the voltage regulator DZ51 through the motor M, the diode D55, and the resistor R512.
  • the self-generating power source passes the resistor R510 and the source and drain of the transistor BG54 to the transistor BG53.
  • the base current is injected to turn on the transistors BG53 and BG52.
  • the collector output voltage of the transistor BG51 triggers the bidirectional thyristor BCR51 through the resistor R54 to turn it on, and the motor M is energized.
  • the motor M is energized, an output voltage is generated on the coil L53. This voltage charges C53 through the diode D57, and charges the capacitor C54 through the diode D56, the nozzle R59, and R510, causing the transistor BG54 to turn off quickly, and the transistor BG51 is started by the motor M Stop after time.
  • the transistor BG52 After the transistor BG52 is turned on, its collector injects a base current to the transistor BG53 through the zener diode DZ52, so even if the transistor BG54 is turned off, the transistors BG52 and BG53 remain on. After that, if the AC power supply 1 is temporarily suspended and then re-energized. Because the transistor BG54 is turned off, the transistors BG53 and BG52 will not be turned on, and the motor M cannot be energized to play a power failure protection function. After stopping, the voltage induced on the line S L53 disappears, the capacitor C53 discharges to the resistor R511, and about 5 minutes, the voltage on C53 drops to the turn-on voltage of the transistor BG54.
  • the transistor BG54 is turned on, and the bidirectional thyristor BCR51 is turned on, and the motor M is energized.
  • the characteristic of this power failure protection is that the power is switched on for the first time or after 5 minutes of power failure. After the motor M starts, as described above, the transistor BG51 is turned off. At this time, if the motor M running current exceeds the rated value, the output voltage of the rectifier circuit 8 will increase. After the voltage is divided by the resistors R55 and R56, the unidirectional thyristor SCR51 is turned on.
  • the self-generated power is short-circuited, causing the transistor BG52 and the thyristor BCR51 to be turned off, and the motor M is powered off.
  • the subsequent automatic reset is similar to the automatic power-on after power failure protection, that is, after the capacitor C53 is discharged, the transistor BG54 is turned on, which causes the transistor BG52 and the thyristor BCR51 to be turned on, and the motor M is powered on again.
  • the transistor BG51 When the motor M starts, although the starting current is larger than the running current, the transistor BG51 is on at this time, and the drain-source equivalent resistance of the transistor BG51 and the resistor R57 are connected in series with the resistor R55 in series, which reduces the triggering of the unidirectional thyristor SCR51. Current and voltage. Therefore, as long as the appropriate values of the nozzles R57, R59, and capacitor C54 are selected, the thyristor SCR51 will not be turned on under normal starting current and starting time, and when it cannot be started or the starting current is too large The transistor SCR51 is turned on, and the motor M is powered off. After starting protection 6/07239
  • the automatic reset is the same as the case of running overcurrent protection and will not be repeated.
  • FIGS. 41 and 42 are two circuit diagrams showing a third embodiment of the present invention shown in Figs. 15 and 33, respectively.
  • the circuit is a two-wire temperature-controlled switching device, load 2 is a heater, and the load current is 1 amp. Because the circuit uses a bidirectional current stabilization component 5, the applicable range of the AC power supply 1 voltage is 25 volts to 220 volts, and the frequency is 50 Hz.
  • Transformer H111 is equivalent to HI in Figure 15.
  • the bidirectional current stabilization component 5 is composed of transistors BG111, BG112, The electrodes D115, D116, current stabilizers WC111, WC112, voltage regulators DZ111, DZ112, resistors R116, R117.
  • the bidirectional main circuit switch assembly 4 uses the form of FIG. 3.
  • the rectification and stabilization circuit 6 is composed of two poles Dili to D113 and integrated circuit IC111 and its peripheral components.
  • the control circuit 7 is composed of an integrated circuit IC112 and its peripheral components, among which the nozzle R113 is a slowly changing negative temperature coefficient thermistor. When the resistor R113 is cooled to 30K ⁇ , the third pin of the integrated circuit IC112 outputs a high level, so that the bidirectional phototransistor in the photocoupler TR111 is turned on, and the heater 2 is powered on.
  • the third pin of the integrated circuit IC112 When the nozzle value of the heated electric H R113 drops to 7.5K ⁇ , the third pin of the integrated circuit IC112 outputs a low level, so that the bidirectional photo-thyristor is turned off, and the heater 2 is powered off.
  • the additional on-state voltage drop of the Tai circuit when the load current is 1 amp is 0.4 volts, and the additional off-state current is 5 mA.
  • the circuit is a two-wire protection switching device that relies on a button to control on / off.
  • the two-way main circuit switch assembly 4 uses the form of FIG. 11, so the circuit composition is better than the structure shown in the circuit block diagram of FIG. 33.
  • the application range of the AC power supply voltage is 25 volts to 220 volts, the frequency is 50 Hz, and the applicable range of the load current is 0.5 amps to 2 amps.
  • the specific working process is as follows: After pressing the switch K115, the two self-generated power sources established at the same time respectively turn on the thyristors SCR114 and SCR115, and the load 2 is powered on.
  • switch K115 Since then, two self-generated power sources Relying on the load current in line 3 ⁇ 4 L172 to maintain, switch K115 does not need to be turned on.
  • the switch K116 When the switch K116 is pressed or the load current exceeds 2 amps, the phototransistor in the thyristor SCR113 and the photocoupler LEC111 is turned on, the thyristors SCR114 and SCR115 are turned off, and the load 2 is powered off.
  • FIG. 43 and 44 are circuit diagrams showing a fourth embodiment of the present invention shown in Fig. 16, respectively.
  • the circuit is a two-wire short-circuit overload protection switching device with an automatic reset function.
  • a transformer H121 is equivalent to H2 in FIG. 16, and a resistor R118 is equivalent to 1 ⁇ in FIG. 16.
  • the rectifier circuit 8 is composed of diodes D117 to D120.
  • the voltage stabilization circuit 9 is composed of a resistor R119, a capacitor C114, and a voltage regulator DZ113.
  • the control circuit 7 is composed of resistors R120, R121, R122, R123, and an inter-crystal transistor SCR111.
  • the AC power supply voltage range is 100 volts to 220 volts, and the frequency is 50 Hz.
  • the output voltage of the rectifier circuit 8 increases, causing the thyristor SCR111 to be turned on, the VMOS transistors VM111 and VM112 to be turned off in the forward direction, and the switching device to be opened to complete the protection function. Thereafter, during a half-cycle period when the potential at terminal 3 is higher than the potential at terminal 3 ', the switching device has a short conduction time of several microseconds in the case of a short circuit; in the overload condition, the switching device has a short conduction time of several microseconds to milliseconds. Therefore, this circuit can be reset quickly after the cause of short circuit or overload is removed, and the reset time is less than 20 ms.
  • this circuit is a two-wire automatic reset short-circuit protection switching device used in the super-audio range.
  • the AC power supply 1 is a 50 kHz two-way square wave with an amplitude of 100 volts.
  • the magnitude of the load current is around 1 amp.
  • the composition of this circuit is similar to the circuit of Figure 31, so the short-circuit protection and automatic reset processes are similar to the circuit of Figure 43, but the response time and reset time are different.
  • L181 2 turns, wire diameter 0.63 mm L182 60 boxes, wire diameter 0.13 mm (L182 plus metal shield)
  • FIG. 45 is a circuit diagram showing a fifth embodiment of the present invention shown in FIG.
  • This circuit is a two-wire short-circuit overload protection switching device with automatic reset function.
  • the two-way main circuit switch assembly 4 uses the form of Fig. 8. 3 ⁇ 4 S R124 is equivalent to the resistor R 17 of g. Its unlabeled components and
  • the circuit in Figure 43 is the same.
  • the protection function of this circuit is the same as that of Figure 43 except that the switching device has a short on-time and reset time of less than 10 milliseconds within each half cycle of AC power after protection.
  • FIG. 46 is a detailed circuit diagram showing a sixth embodiment of the present invention shown in FIG. 18.
  • FIG. This circuit is a two-wire protective switch device that relies on a button to control on / off. Due to the use of current stabilization components, Xin AC power supply voltage is applicable from 25 volts to 220 volts, and the frequency is 50 Hz. The applicable range of the load current is 1 amp to 3 amps.
  • H131 is equivalent to H2 in FIG. 18.
  • the unidirectional current stabilization component 10 is composed of a diode D129, WC113, transistors BG113, BG114, a voltage regulator DZ115, and resistors R130 and R131.
  • the rectifier circuit 8 is composed of diodes D125 to D128.
  • the voltage stabilization circuit 9 is composed of a resistor R128, a DZ114, and a capacitor C116.
  • Control circuit 7 consists of push-button switches Kill and K112, resistors R126, R127, R129, and thyristor SCR112.
  • the two-way main circuit switch assembly uses the form of Figure 1. The specific working process is as follows: after pressing the switch Ki ll, the self-generated power source established by the AC power source 1 through the load 2 and the single-phase current stabilizing component 10 triggers the thyristor BCR11 via the resistor R129 to make it conductive, and the load 2 is powered on. After that, the self-generating power supply is maintained by the load current in the line L131, and the button switch Kill does not need to be turned on.
  • the self-generated power will be short-circuited, the thyristor BCRlll will be turned off, and the load 2 will be powered off.
  • the load current exceeds 3
  • the output voltage of the rectifier circuit 8 increases. After the voltage is divided by the electric nozzle R126.R127, the thyristor SCR112 is turned on, thereby turning off the thyristor BCR111 and completing the overload protection process.
  • Fig. 47 is a detailed circuit diagram showing a seventh embodiment of the present invention shown in Fig. 19.
  • the circuit is a two-wire short-circuit overload protection switching device with automatic reset function.
  • the unidirectional current stabilizer 10 is composed of a transistor BG115, a current stabilizer WC114, a diode D130, a voltage regulator DZ116, and a resistor R132.
  • the circuit structure of this switchgear is the same as the circuit of FIG. 43 except that the resistor R118 in the circuit of FIG. 43 is replaced by the unidirectional current stabilization component 10. Due to the use of the unidirectional current stabilization module 10, the applicable range of the AC power supply voltage of the switching device is expanded from 25 volts to 220 volts, and other functions and characteristics are the same as those of the circuit of FIG.
  • Fig. 48 is a circuit diagram showing an eighth embodiment of the present invention shown in Fig. 20.
  • This circuit is a two-wire short-circuit overload protection switching device with automatic reset function.
  • the unidirectional current stabilizing component 10 is composed of a transistor BG116, a current stabilizing tube WC115, a diode Dl31, a voltage stabilizing tube DZ116 and It consists of resistor R133.
  • the circuit structure of this switchgear is the same as that of the circuit of FIG. 45 except that the nozzle R124 in the circuit of FIG. 45 is replaced with the unidirectional current stabilization component 10. Because the fish is directed to the steady-flow component 10, the applicable range of the AC power supply voltage of the switching device is expanded to 25 volts to 220 volts, and other functions and characteristics are the same as those of the circuit of FIG. 45.
  • g49 is a detailed circuit diagram showing a ninth embodiment of the present invention shown in FIG.
  • the circuit is a two-wire temperature-controlled switching device.
  • Load 2 is a heater and the load current is 1 amp.
  • AC power supply voltages range from 150 volts to 220 volts and a frequency of 50 Hz.
  • the transformer H141 is equivalent to the transformer H2 of FIG. 21, and the capacitor C117 is equivalent to the impedance Z of FIG. 21.
  • the bridge rectifier circuit in FIG. 21 is composed of four diodes D132 to D135.
  • the bidirectional main circuit current component 4 uses the form of FIG. 5.
  • the rectifier, voltage regulator circuits 8, 9 and control circuit 7 of this circuit are the same as the circuit of FIG. 41, so the temperature control characteristics are also the same as the circuit of FIG. 41.
  • Fig. 50 is a detailed circuit diagram showing the tenth embodiment of the present invention shown in Fig. 11;
  • the circuit is a two-wire temperature-controlled switching device.
  • the composition of the four diodes D140 to D143 is equivalent to the bridge rectifier circuit in FIG. 22.
  • the unidirectional current stabilizing component 10 is composed of the transistors BG123, BG124, a current stabilizing tube WC116, a diode D144, a voltage stabilizing tube DZ119, a resistor R134 and Composition of R135.
  • the bidirectional main circuit switch assembly 4 uses the form of FIG. 9.
  • Rectifier voltage regulator circuit 8. 9 and control circuit 7 are the same as the circuit of FIG. 49, so the temperature control characteristics of this circuit are the same as the circuit of FIG. 49. Due to the use of the current stabilization module 10, the AC voltage range of this circuit is 25 volts to 220 volts.
  • Fig. 51 is a detailed circuit diagram showing an eleventh embodiment of the present invention shown in Fig. 23;
  • the circuit is a two-wire temperature-controlled switching device.
  • Capacitor C118 is equivalent to impedance Z in FIG. 23, and diodes D145 and D146 are equivalent to diodes D1 and D2 in FIG.
  • the two-way main circuit switch assembly 4 uses the form of FIG. 3.
  • the rectifying and stabilizing circuits 8, 9 and control circuit 7 of this circuit are the same as the circuit of Fig. 49, and the use conditions and temperature control characteristics are also the same as the circuit of Fig. 49.
  • Fig. 52 is a detailed circuit diagram showing a twelfth embodiment of the present invention shown in Fig. 24.
  • the circuit is a two-wire temperature-controlled switching device.
  • the capacitor C119 is equivalent to the impedance Z in FIG. 24, and the diodes D151 and D152 are equivalent to the diodes D1 and D2 in FIG. 24.
  • the two-way main circuit switch assembly uses the form of Figure 7.
  • the rectification, voltage stabilization circuits 8, 9 and control circuit 7 of this circuit are the same as the circuit of FIG. 49, and the use conditions and temperature control characteristics are also the same as those of the circuit of FIG. 49.
  • Fig. 53 is a detailed circuit diagram showing a thirteenth embodiment of the present invention shown in Fig. 25.
  • This circuit is a two-wire contact-type temperature-controlled switchgear, load 2 is a heater, and the applicable range of load current is 1 amp to 3 amps.
  • the AC power supply voltage ranges from 150 volts to 250 volts and has a frequency of 50 Hz.
  • the transformer H151 corresponds to the transformer HI in FIG. 25
  • the capacitor C120 corresponds to the impedance Z in FIG.
  • Rectifier regulator circuit 6 by diode D153 to D156 are composed of integrated circuit IC113 and peripheral components.
  • the control circuit 7 is composed of an integrated circuit IC114 and its peripheral components, among which the resistor R138 is a slowly changing negative temperature coefficient thermosensitive nozzle.
  • the resistor R138 is a slowly changing negative temperature coefficient thermosensitive nozzle.
  • the third pin of the integrated circuit IC114 outputs a high level, so that the normally open contact of the mechanical relay JZ111 is closed, and the heater 2 is energized.
  • the resistance of the heated resistor R138 drops to 7.5K ⁇
  • the third pin of the integrated circuit IC114 outputs a low voltage ⁇ 1 , so that the normally open contact of the relay JZ111 is disconnected, and the heater 2 is powered off. 8 Volt.
  • the additional on-state voltage drop of this switching device at a load current of 1 amp is 0.8 volts.
  • JZ111 NT73C-510 (12VDC)
  • Fig. 54 is a detailed circuit diagram showing a fourteenth embodiment of the present invention shown in Fig. 26.
  • the circuit is a two-wire, contact-controlled, temperature-controlled switching device.
  • the numbered components form a bidirectional current stabilizing component 5.
  • the composition of ⁇ is the same as that of the circuit of FIG. 53. Due to the use of the current stabilizing component 5, the applicable range of the AC power supply voltage is expanded from 25 volts to 250 volts, and other usage conditions and temperature control characteristics of this circuit are the same as those of the circuit of FIG. 53.
  • Fig. 55 is a detailed circuit diagram showing a fifteenth embodiment of the present invention shown in Fig. 27.
  • This circuit is a two-wire contact protection switchgear that relies on a button to control on / off. communicate with Power supply voltages range from 150 volts to 250 volts and a frequency of 50 Hz. The applicable range of the load current is 1 amp to 3 amps.
  • the transformer H161 is equivalent to the transformer H2 in FIG. 27, and the diode D163 and the resistor R147 are equivalent to the diode D and the nozzle R in FIG. 27.
  • the rectifying circuit 8 is composed of diodes D159 to D162.
  • the voltage stabilization circuit 9 is composed of a resistor R144, a voltage regulator DZ122, and a capacitor C124.
  • the control circuit 7 is composed of switches K113 and K114, electric nozzles R145, R146 and a transistor SCR113.
  • the specific working process is as follows: After pressing the switch K113, the AC power source 1 energizes the coil of the mechanical relay JZ112 through the self-generated power source established by the load 2 and the diode D163 and the resistor R147. Its normally open contact is closed and the load 2 is energized. After that, the self-generated power is maintained by the load current in the coil L161, and the switch K113 does not need to be turned on. In the future, just press the switch K 114, and the load will be powered off.
  • JZ112 NT73C- 510 (12VDC)
  • FIG. 56 is a detailed circuit diagram showing a sixteenth embodiment of the present invention shown in FIG. 28.
  • FIG. This circuit is a two-wire contact protection switchgear that relies on a button to control on / off.
  • the numbered elements constitute the unidirectional steady-flow assembly 10.
  • the circuit structure is the same as that of the circuit of FIG. 55 except that the diode D163 and the resistor R147 are replaced by the unidirectional current stabilization component 10. Due to the use of the current stabilization component 10, the applicable range of the AC power supply voltage is expanded from 25 volts to 250 volts, and other conditions and protection characteristics of this circuit are the same as those of the circuit of FIG. 55.
  • the numbered components in the circuit in Figure 56 use the following models, for example:
  • Fig. 57 is a detailed circuit diagram showing a seventeenth embodiment of the present invention shown in Fig. 29.
  • the circuit is a two-wire contact-protected switching device that relies on a button to control on / off.
  • the capacitor C125 is equivalent to the nozzle Z in FIG. 29, and the diodes D165 and D166 are equivalent to the diodes D1 and D2 in FIG.
  • the rest of the composition is the same as that of the 55 circuit, so the use conditions and protection characteristics of the circuit are also the same as the circuit of FIG. 55.
  • Fig. 58 is a detailed circuit diagram showing the eighteenth embodiment of the present invention shown in Fig. 30.
  • the circuit is a two-wire, contact-controlled, temperature-controlled switching device.
  • the parameters of the transformer are the same as the transformer H161 in Figure 55.
  • the capacitor C126 is equivalent to the impedance Z in Figure 30.
  • the composition of the four diodes D167 to D170 is equivalent to the bridge rectifier circuit BR in Figure 30.
  • the rectifier, voltage regulator circuits 8, 9, control circuit 7, and mechanical relay of this circuit are the same as the circuit of Fig. 53, so the use conditions and temperature control The characteristics are also the same as the circuit of FIG. 53.
  • FIG. 59 is a detailed circuit diagram showing a nineteenth embodiment of the present invention shown in FIG. 31.
  • FIG. The circuit is a two-wire contact-controlled temperature-controlled switching device.
  • the composition of the four diodes D172 to D175 is equivalent to the bridge rectifier circuit BR in FIG. 31.
  • the unidirectional current stabilization component 10 is composed of the transistors BG131, BG132, the current stabilizer WC120, the diode D171, the voltage regulator DZ125, and the resistor R150. , R151, the rest of the composition is the same as the corresponding part of the circuit of Figure 58. Except that the AC power supply voltage is applicable from 25 volts to 250 volts, other conditions and temperature control characteristics of this circuit are the same as those of the circuit of FIG. 58.
  • the numbered components in the circuit of Figure 59 use the following models, for example:
  • FIG. 60 and 61 are circuit diagrams showing the twentieth embodiment of the present invention shown in FIG. 32, respectively.
  • this circuit is a two-wire temperature-controlled switchgear
  • load 2 is a heater
  • the applicable range of load current is 1 amp to 6 amps.
  • the AC power supply voltage ranges from 100 volts to 300 volts and has a frequency of 50 Hz.
  • the transformer H191 is equivalent to the transformer H2 in Figure 32, and the capacitors C133 and C134 are equivalent to those in Figure 32! Resistant to Z1 and Z2.
  • the main circuit switch assembly adopts the form of Figure 6.
  • diodes D190 and D191 are added.
  • the rectifying and stabilizing circuit 6 is composed of diodes D192 to D195 and an integrated circuit IC115 and its peripheral components.
  • the control circuit 7 has the same composition and function as the circuit in Fig. 41 except that the resistor R170 is added.
  • this circuit is a two-wire short-circuit overload protection switching device with automatic reset function.
  • the transformer H1101 is equivalent to the transformer H2 in FIG. 32, and the bidirectional main circuit switch component adopts the form of FIG. 4, wherein the internal capacitance between the gate and the drain of the VMOS transistors VM116 and VM117 is equivalent to the ffi impedance in FIG. 32 Z 1 and Z 2.
  • the rectifying and stabilizing circuit 6 is composed of diodes D197 to D1100, a stabilizing tube DZ133, a capacitor C135, and a resistor R173.
  • the control circuit 7 is composed of a voltage regulator DZ132, resistors R171, R172, and a transistor SCR116.
  • the AC power supply voltage ranges from 30 volts to 220 volts and has a frequency of 50 Hz.
  • the applicable range of load current is zero to 5 amps.
  • the reset time is from 0.5 seconds to 1 second. Because the reset time is longer than the previous similar circuit, the circuit can adapt to the overload condition of the inductive load.
  • the protection function of this circuit is the same as that shown in Figure 43 except that the switching device has a short on-time and reset time every few seconds after protection.
  • the present invention provides an AC two-wire switching device using a transformer to form a self-generating power source, which changes the method of establishing a self-generating power source based on the existing technology, thereby greatly reducing the additional on-state voltage drop and the additional off-state current.
  • the effect is especially significant under high current load conditions; in addition, the attached overload signal can easily constitute overload protection.
  • the device can not only work under non-sinusoidal power conditions, but also can build a variety of self-generating power sources to make the inside of the switching device easily adapt to various control circuits and control methods. More importantly, the invention opens up the advantages of AC two-wire switching devices. A new direction for development.

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  • Control Of Electrical Variables (AREA)

Abstract

Dispositif de commutation de courant alternatif à deux fils, comprenant deux bornes de branchement, un ensemble de commutation à deux sens sur une boucle primaire, relié entre les bornes, un circuit de commande permettant de commander le fonctionnement du dispositif de commutation à deux sens dans la boucle primaire et un circuit pour le courant d'énergie propre, assurant l'alimentation du circuit de commande. Le circuit pour le courant d'énergie propre comprend un redresseur, un circuit d'alimentation en courant stabilisé et au moins un inducteur mutuel. Ce dispositif de commutation de courant alternatif à deux fils permet de réduire considérablement la chute de tension additionnelle du conducteur et le courant additionnel de rupture.
PCT/CN1995/000070 1994-08-27 1995-08-24 Dispositif de commutation de courant alternatif a deux fils WO1996007239A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU32518/95A AU3251895A (en) 1994-08-27 1995-08-24 A two wires a.c switch apparatus

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN94112284.0 1994-08-27
CN94112284A CN1054950C (zh) 1994-08-27 1994-08-27 自生电源使用互感器的交流二线式开关
CN94114032.6 1994-12-15
CN94114032A CN1053538C (zh) 1994-12-15 1994-12-15 自生电源使用互感器的交流二线式开关

Publications (1)

Publication Number Publication Date
WO1996007239A1 true WO1996007239A1 (fr) 1996-03-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN1995/000070 WO1996007239A1 (fr) 1994-08-27 1995-08-24 Dispositif de commutation de courant alternatif a deux fils

Country Status (2)

Country Link
AU (1) AU3251895A (fr)
WO (1) WO1996007239A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999035744A1 (fr) * 1998-01-05 1999-07-15 Robert Bosch Gmbh Circuit pour connecter un consommateur electrique avec une source de tension alternative
CN109378886A (zh) * 2018-10-26 2019-02-22 杰华特微电子（杭州）有限公司 一种单火线供电电路

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986052A (en) * 1975-05-29 1976-10-12 North Electric Company Power switching control circuit with enhanced turn-off drive
US4629971A (en) * 1985-04-11 1986-12-16 Mai Basic Four, Inc. Switch mode converter and improved primary switch drive therefor
CN2092833U (zh) * 1991-01-14 1992-01-08 于兴根 消除半导体压降和漏电流装置
CN1087185A (zh) * 1992-11-15 1994-05-25 李维安 稳压电路的一种特殊供电方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986052A (en) * 1975-05-29 1976-10-12 North Electric Company Power switching control circuit with enhanced turn-off drive
US4629971A (en) * 1985-04-11 1986-12-16 Mai Basic Four, Inc. Switch mode converter and improved primary switch drive therefor
CN2092833U (zh) * 1991-01-14 1992-01-08 于兴根 消除半导体压降和漏电流装置
CN1087185A (zh) * 1992-11-15 1994-05-25 李维安 稳压电路的一种特殊供电方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999035744A1 (fr) * 1998-01-05 1999-07-15 Robert Bosch Gmbh Circuit pour connecter un consommateur electrique avec une source de tension alternative
US6259610B1 (en) 1998-01-05 2001-07-10 Robert Bosch Gmbh Circuit system for connecting an electrical consumer with an alternating-voltage source
CN109378886A (zh) * 2018-10-26 2019-02-22 杰华特微电子（杭州）有限公司 一种单火线供电电路

Also Published As

Publication number Publication date
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