CN202798004U

CN202798004U - Intelligent compound switch

Info

Publication number: CN202798004U
Application number: CN2012205288454U
Authority: CN
Inventors: 顾小健; 王宏宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-10-16
Filing date: 2012-10-16
Publication date: 2013-03-13
Anticipated expiration: 2022-10-16

Abstract

The utility model relates to an intelligent compound switch which is composed of multiple switch control channels and channel switch execution parts. Each channel switch execution part is composed of a unidirectional antiparallel silicon controlled rectifier group and a magnetic latching relay. Each switch control channel is composed of a controller, a zero cross detection circuit, a magnetic latching relay drive circuit, a display circuit, a power supply loop and a control signal input circuit. The zero cross detection circuit, the magnetic latching relay drive circuit, a silicon controlled rectifier drive circuit, the display circuit, the power supply loop and the control signal input circuit are connected with the controller respectively. The switch control channel is provided with a detection circuit. The detection circuit collects detection signals of the zero cross detection circuit, the magnetic latching relay drive circuit, the display circuit, the power supply loop, the control signal input circuit, the unidirectional antiparallel silicon controlled rectifier group, and the magnetic latching relay, and inputs the detection signals into the controller. The intelligent compound switch can solve the safety adaptability problem.

Description

A kind of intelligent compound switch

Technical field

The utility model patent belongs to the switching technique field, is specifically related to the switching device that must use when a kind of low-voltage power power network harmonic wave management/reactive power compensation makes Power Capacitors, is a kind of intelligent compound switch for low-voltage circuit.

Background technology

The modes such as protective circuit that existing combination switch fail safe mainly relies on reliable zero passage detection method and technology, controlled silicon conducting are realized; but often ignored some application safety potential problems relevant with the engineering applied environment on the Technical Design of like product at present, showed as follows:

A. the connection inspection of periphery power inlet wire circuit itself comprises: whether the inspection of combination switch inlet wire circuit exists inlet wire connection fault or broken string; Whether be in overvoltage/under-voltage condition; Line harmonic situation etc.If the in-wiring of peripheral applied environment is not checked, itself exist at the in-wiring circuit in the situation of fault or the hidden danger and blindly use combination switch, then cause most probably power circuit and (or) fault or the accident of the power consumption equipment of controlling;

B. self detecting of the control circuit of combination switch own and device, comprising: whether controller itself works, and whether controllable silicon works; Whether magnetic latching contactor normally resets etc.If any electromechanical component of combination switch itself breaks down, then answer prompting user in time to fix a breakdown, avoid the combination switch misoperation cause power circuit and (or) fault or the accident of the power consumption equipment of controlling;

C. the strick precaution of the electromagnetic signal of combination switch applied environment being disturbed, comprising: the signal of ON-OFF control circuit is anti-tampering; Zero cross detection circuit anti-tampering etc.If the applied environment at combination switch has in the situation of strong electromagnetic, its switch controlling signal and zero passage detection signal circuit are not taked anti-interference method, then just very likely misoperation of combination switch, so cause power circuit and (or) fault or the accident of the power consumption equipment of controlling;

Before this, the technology of more existing assurance combination switch fail safes is attempted.In the disclosed application number of State Intellectual Property Office of the People's Republic of China is 200710049550.2 mandate patent of invention, described a kind of by in the method that is connected in series monostable circuit between single-chip microcomputer and the thyristor gating circuit, avoid exporting at single-chip microcomputer the conducting of thyristor gating circuit ultra-long time occurs when out of control, may cause the combination switch fail safe Enhancement Method of short trouble; Application number be disclose in 201110032781.9 the application for a patent for invention a kind of by adopting bidirectional triode thyristor to cooperate with magnetic maintained switch switching, optimize the bidirectional triode thyristor ON time and reduce the generation heat, thereby cancellation bidirectional triode thyristor heat abstractor, the method for raising combination switch security reliability.Application number is to disclose in the application for a patent for invention of 200710111270.x a kind ofly to consist of thyristor gating circuit by two identical zero cross detection circuits by reverse parallel connection, by reliable zero passage detection, improves the method for combination switch safety in utilization.

In the above combination switch related application, all do not consider the connection inspection of the described combination switch periphery power of present patent application inlet wire circuit itself, self detecting of the control circuit of combination switch own and device, the technology contents such as strick precaution that the electromagnetic signal of combination switch applied environment is disturbed.Therefore, we study for more above-mentioned practical application existing problems of combination switch, thereby propose present patent application.

Summary of the invention

The purpose of this utility model is to provide a kind of intelligent compound switch, and it further solves the safe adaptability problem of above-mentioned combination switch applied environment, and is not only safe but also reliable.

For achieving the above object, the solution that this patent is taked is: a kind of intelligent compound switch, formed by a plurality of switch control control channels and each channel switch execution unit, described each channel switch execution unit is comprised of unidirectional inverse parallel Group of Silicon Controlled Rectifier and magnetic latching relay, each switch control control channel is by controller, zero cross detection circuit, drive circuit of magnetic latching relay, display circuit, electric power loop and control signal input circuit form, described zero cross detection circuit, drive circuit of magnetic latching relay, controllable silicon drive circuit, display circuit, electric power loop and control signal input circuit are connected with controller respectively, be provided with testing circuit in the described switch control control channel, described testing circuit gathers described zero cross detection circuit, drive circuit of magnetic latching relay, display circuit, electric power loop, the control signal input circuit, the detection signal of unidirectional inverse parallel Group of Silicon Controlled Rectifier and magnetic latching relay, and detection signal inputted described controller.

All contain testing circuit in each switch control channel of intelligent compound switch, described testing circuit can arrange separately, also can be separately positioned in other circuit of combination switch.

Described testing circuit is used for the inspection of combination switch inlet wire circuit, comprises whether having inlet wire connection fault or broken string; Whether be in that overvoltage is owed or pressure condition; Line harmonic situation etc.

Described testing circuit is used for self detecting of controller and switch execution unit, and comprising: whether controller itself works, and whether Group of Silicon Controlled Rectifier works.

During the power-on self-test, each testing circuit is exported a particular value i to controller, and controller calculates i and reference point c, comprehensive analysis and judgement, and export this passage fault-free sign or Reflector is arranged.According to this sign, determine each passage self-detection result output display.At last, according to each test point input of electric power loop, controller is judged each circuit and device quality, if then disable switch action of fault is arranged.

As further improvement of the utility model, also be provided with the reset detection circuit in the described testing circuit, for detection of the operating state of unidirectional inverse parallel Group of Silicon Controlled Rectifier and drive circuit of magnetic latching relay.

After intelligent compound switch enters normal workflow, when each workflow circulation begins, capital startup controller resets to control and detects, before carrying out the switch on-off operation, first-selected by control and detection controllable silicon and drive circuit of magnetic latching relay, guarantee that this two parts switch block is in reliably, normal operating state, carry out in case of necessity reset operation, thereby any electromechanical component of avoiding switch itself breaks down and causes misoperation, and load and electrical network are produced potential safety hazard and adverse effect.

As further improvement of the utility model, the input of control signal input circuit also is connected to filter capacitor, is provided with the filtering treatment circuit in the controller.

After intelligent compound switch enters normal workflow, the input of control signal input circuit optocoupler also is connected to filter capacitor, in controller, there is simultaneously corresponding signal filtering to process, by repeatedly circulation checking (time-delay 200us loop test), can prevent controlling signal jitter and produce miscarrying and drop into shake, avoid misoperation that load and electrical network are produced potential safety hazard and adverse effect.Adopt the design of capacitance-resistance filter anti-clutter circuit, be subject to the electromagnetic interference of peripheral applications environment to avoid zero crossing circuitry, produced " pseudo-zero passage " waveform; With verifying by the repeatedly circulation to the zero cross signal data in the Time Controller, guarantee to detect accurately zero point, thus reliability and the fail safe of enhancing operating passing zero.

This patent main purpose is to strengthen intelligent compound switch itself to the adaptability of various electrical networks and engineering applied environment in the reality use, thereby improve himself safety in utilization and reliability, and obtained in actual applications good check, greatly improved the application reliability of intelligent compound switch.

Description of drawings

Fig. 1 is the intelligent compound switch installation composition structured flowchart of an embodiment of the utility model;

Fig. 2 is intelligent compound switch workflow block diagram among the utility model embodiment;

Fig. 3 is that another embodiment testing circuit of the utility model is arranged on the structural representation in the unidirectional inverse parallel Group of Silicon Controlled Rectifier;

Fig. 4 is that another embodiment testing circuit of the utility model is arranged on the structural representation in the control signal input circuit;

Fig. 5 is the controller circuitry figure of the utility model embodiment;

Fig. 6 is the utility model intelligent compound switch work example winding diagram.

Embodiment

Below in conjunction with embodiment and accompanying drawing thereof this patent is further described.

Referring to Fig. 1, a kind of intelligent compound switch 100, formed by a plurality of switch control control channels and each channel switch execution unit, each channel switch execution unit is comprised of three-phase controllable silicon group 8 and magnetic latching relay 9, each switch control control channel is by controller 1, zero cross detection circuit 2, display circuit 5, electric power loop 3, control signal input circuit 4, drive circuit of magnetic latching relay 6 and controllable silicon drive circuit 7 form, zero cross detection circuit 2, display circuit 5, electric power loop 3, control signal input circuit 4, drive circuit of magnetic latching relay 6 is connected with controllable silicon drive circuit and is connected with controller respectively, be provided with testing circuit 10 in the switch control control channel, testing circuit 10 zero cross detection circuits 2, display circuit 5, electric power loop 3, control signal input circuit 4, drive circuit of magnetic latching relay 6, controllable silicon drive circuit 7, the detection signal of three-phase controllable silicon group 8 and magnetic latching relay 9, and with detection signal input control device 1.

Testing circuit 10 is used for the inspection of combination switch inlet wire circuit, comprises whether having inlet wire connection fault or broken string; Whether be in that overvoltage is owed or pressure condition; Line harmonic situation etc.

Testing circuit 10 is used for self detecting of controller and switch execution unit, and comprising: whether controller itself works, and whether Group of Silicon Controlled Rectifier works.

Above-mentioned each built-up circuit can be realized with prior art circuits.

After the intelligent compound switch installation, connect the control power supply, combination switch at first resets, power-on self-test, controller judges comprehensively that by the signal feedback of zero passage/testing circuit, electric power loop the circuit of combination switch own, device and periphery power circuit have fault-free.If fault-free then enters normal operating conditions, the wait control signal input; If the fault of being judged as then by display circuit, shows the different faults error condition, for the maintainer provides information, make things convenient for the quick localization of faults of maintainer, in time safeguard (maintenance) circuit (equipment).Referring to Fig. 2.

All contain testing circuit 10 in each switch control channel of intelligent compound switch, make another kind of execution mode of the present utility model, testing circuit 10 is for also can be separately positioned in other circuit of combination switch.

As shown in Figure 3, testing circuit 10a is arranged on a structural representation in mutually of three-phase controllable silicon group 8, and three-phase controllable silicon group 8 adopts unidirectional inverse parallel Group of Silicon Controlled Rectifier, and testing circuit 10a adopts photoelectric coupled circuit, and the output of optocoupler also is connected to filter capacitor C19; Testing circuit 10b is arranged on the structural representation of three-phase input/output terminal one in mutually, and testing circuit 10b adopts temperature-sensitive, pressure-sensitive and overvoltage crowbar.

As shown in Figure 4, control signal input circuit 4, input detecting circuit 10c adopts photoelectric coupled circuit, and the output of optocoupler also is connected to filter capacitor C20, C21, C22.

As shown in Figure 5, be provided with the filtering treatment circuit in the controller 1, the filtering treatment circuit comprises the capacitor C that is in parallel 10 and the resistance R 26 that is connected on the VCC input, is connected on the shunt capacitance C9 of VDD input.

The following summary of implementation method:

A plurality of passages of intelligent compound switch all have zero cross detection circuit.During the power-on self-test, each passage all carries out self-check program as follows: at first, and shielding control signal input (in case control signal is interrupted self-check program unusually); Subsequently, export to a particular value i of controller circuitry according to the compound detection loop, controller calculates i and reference point c, comprehensive analysis and judgement, and export this passage fault-free sign or Reflector is arranged.According to this sign, determine each passage self-detection result output display.At last, according to each test point input of electric power loop, controller is judged each circuit and device quality, and with the self-detection result output display.

Power-on self-test by after enter normal workflow, the wait control signal input, the input of control signal input circuit optocoupler also is connected to filter capacitor, in controller, there is simultaneously corresponding signal filtering to process, by repeatedly circulation checking (time-delay 200us loop test), in case the control signal shake produces miscarrying and drops into shake, avoid misoperation that load and electrical network are produced potential safety hazard and adverse effect.Adopt the design of capacitance-resistance filter anti-clutter circuit, be subject to the electromagnetic interference of peripheral applications environment to avoid zero crossing circuitry, produced " pseudo-zero passage " waveform; With verifying by the repeatedly circulation to the zero cross signal data in the Time Controller, guarantee to detect accurately zero point, thereby strengthen reliability and the fail safe that zero passage drops into.See Fig. 3, Fig. 4.

Intelligent compound switch, the switch motion process description is as follows:

The input control level signal judges that according to logic the selection zero crossing drops into through control signal input circuit input control device main circuit; Command signal is provided for the drive circuit of unidirectional inverse parallel Group of Silicon Controlled Rectifier, restarts unidirectional inverse parallel Group of Silicon Controlled Rectifier and drive circuits for triggering, make the conducting of unidirectional inverse parallel Group of Silicon Controlled Rectifier, channel switch enters on-state; And then startup magnetic maintained switch drives circuits for triggering output pulse positive voltage, magnetic maintained switch contact is changed closure state into by normally open and is shorted to unidirectional inverse parallel Group of Silicon Controlled Rectifier input and exports on the two ends, and the controller instruction sheet drives circuits for triggering to the inverse parallel Group of Silicon Controlled Rectifier and closes unidirectional inverse parallel Group of Silicon Controlled Rectifier.Combination switch is connected run duration and is just carried out separately by the magnetic maintained switch.

When controller receives the cut-out channel instruction, at first start unidirectional inverse parallel Group of Silicon Controlled Rectifier and drive circuits for triggering, the conducting of unidirectional inverse parallel Group of Silicon Controlled Rectifier is incorporated on the magnetic maintained switch; And then indication magnetic maintained switch driving circuits for triggering output pulse negative voltage, make magnetic maintained switch contact be converted to normally open, cut off passage; At last, the unidirectional inverse parallel Group of Silicon Controlled Rectifier of controller indication bidirectional triode thyristor drives circuits for triggering Automatic-searching zero crossing and cuts off unidirectional inverse parallel Group of Silicon Controlled Rectifier.

Because in the combination switch switching process, mainly to be finished by unidirectional inverse parallel Group of Silicon Controlled Rectifier moment, running is undertaken by the magnetic maintained switch, and the two cooperation is finished, and can satisfy non-impact current, without electric arc, the switching requirement of few heating.

Claims

1. intelligent compound switch, formed by a plurality of switch control control channels and each channel switch execution unit, described each channel switch execution unit is comprised of unidirectional inverse parallel Group of Silicon Controlled Rectifier and magnetic latching relay, each switch control control channel is by controller, zero cross detection circuit, drive circuit of magnetic latching relay, display circuit, electric power loop and control signal input circuit form, described zero cross detection circuit, drive circuit of magnetic latching relay, controllable silicon drive circuit, display circuit, electric power loop and control signal input circuit are connected with controller respectively, it is characterized in that, be provided with testing circuit in the described switch control control channel, described testing circuit gathers described zero cross detection circuit, drive circuit of magnetic latching relay, display circuit, electric power loop, the control signal input circuit, the detection signal of unidirectional inverse parallel Group of Silicon Controlled Rectifier and magnetic latching relay, and detection signal inputted described controller.

2. intelligent compound switch according to claim 1 is characterized in that, also is provided with the reset detection circuit in the described testing circuit, for detection of the operating state of unidirectional inverse parallel Group of Silicon Controlled Rectifier and drive circuit of magnetic latching relay.

3. intelligent compound switch according to claim 1 is characterized in that, the input of described control signal input circuit is parallel with filter capacitor, and described controller voltage input end is provided with the filtering treatment circuit.