CN100463333C - Double-electric source automatic change-over switch controller - Google Patents

Abstract

A control circuit of double power supply automatic converting switch is prepared as forming control circuit mainly by two double master-slave diode D triggers and four two-input Nor gates; using input end of control circuit to receive fire fighting signal and spacing switch signal; connecting control circuit separately to detection circuit of normally used power supply, detection circuit of spare power supply and control circuit power supply; connecting output end of control circuit to double power supply automatic converting switch.

Description

Double-electric source automatic change-over switch controller

Technical field

The present invention relates to a kind of power control, particularly a kind of double-electric source automatic change-over switch controller.

Background technology

At present, double power supply automatic transfer switch adopts electronic-controlled installation mostly.According to the requirement of country,, should adopt dual power supply for some important I and II loads with the existing relevant specification of industry; But the power supply of the fire protection control room of skyscraper, fire pump, Fire lift, Smoke prevention smoke exhaust fan etc. should be provided with automatic switching control equipment at last one-level distribution box place.In order to guarantee the continuity of important load power supply, the application demand of double power supply automatic transfer switch electrical equipment more and more widely, technical performance requires also more and more higher, the Performance And Reliability of double power supply automatic transfer switch, the safety that directly affects each important place electricity consumption with reliable, has been become an indispensable important component part in the low-voltage distribution system.China took up to research and develop and produced various types of products so far late nineteen nineties.The automatic change-over control forms is from having experienced three evolutions the earliest till now, and first generation product is the conventional conversion control system that adopts the low pressure discrete component to form, and its shortcoming is that volume is big, function singleness, poor reliability; Second generation product is the electronic product of application simulation circuit design, be enhanced than the aspects such as properties of product of the first generation, but on the reliability and parameter setting and adjustment aspect also is subjected to certain restriction on using; The third generation is to use intelligent controller, is the electronic product of basic engineering with the digital circuit, has improved the function of conversion and control greatly.Digital circuit on the market is the controller on basis now, and complex circuit, cost height are made complex manufacturing, and reliability is not very high.Therefore under the prerequisite that guarantees technical performance, design a kind of circuit advantages of simple, make and produce simply, the double-electric source automatic change-over switch controller that cost is low, reliability is high is necessary.

Summary of the invention

The objective of the invention is to overcome above-mentioned weak point, provide that a kind of circuit is simple, dependable performance, widely used double-electric source automatic change-over switch controller.

The technical solution adopted in the present invention is for achieving the above object: a kind of double-electric source automatic change-over switch controller, this circuit comprises control circuit, its input receives fire-fighting signal, external control signal, limit switch signal, control circuit links to each other with power sense circuit commonly used, stand-by power supply testing circuit respectively, be connected with the control circuit power supply simultaneously, the control circuit output connects double power supply automatic transfer switch; It is characterized in that control circuit is connected to form by following automatic conversion and control part and manual switch control section:

The composition of described manual switch control section comprises: 7 pin of external control signal input terminal J4 are connected with diode D1 anode with voltage-stabiliser tube DY1 negative electrode respectively by resistance R 2, form fire-fighting and close the input circuit of signal, diode D1 negative electrode is connected with control button SB1, be connected with resistance R 1 again, form the input circuit that closes power supply signal commonly used and be connected with 6 pin of d type flip flop U1A; Control button SB2 connects resistance R 11 and forms the input circuit that closes the stand-by power supply signal, links to each other with 6 pin of d type flip flop U2A and the anode of diode D4 respectively again, and the negative electrode of diode D4 is connected with 8 pin of d type flip flop U1B; 6 pin of external control signal input terminal J4 connect to form the input circuit of fire-fighting sub-signal respectively with voltage-stabiliser tube DY2 negative electrode and diode D8 anode by resistance R 22; Control button SB3 is connected with diode D8 negative electrode, and the input circuit that connects the two sub-signals of resistance R 17 compositions again is connected with 8 pin of d type flip flop U2B; 2 pin of the input terminal J3 of limit switch signal connect resistance R 5 and form main limit switch signal input circuit, be connected with 4 pin of d type flip flop U1A again, 3 pin of the input terminal J3 of limit switch signal connect diode D6 anode and resistance R 14 respectively, form the input circuit of the secondary limit switch signal of two-way, be connected with 10 pin of d type flip flop U1B and 4 pin of d type flip flop U2A respectively again; 1 pin of the input terminal J3 of limit switch signal is connected with resistance R 21, forms two input circuits of limit switch signal that divide and is connected with 10 pin of d type flip flop U2B; 2 pin of d type flip flop U1A are connected with resistance R 4, and resistance R 4 is connected with diode D2 negative electrode again; 2 pin of d type flip flop U2A are connected with resistance R 13, and resistance R 13 is connected with diode D7 negative electrode again; 12 pin of d type flip flop U2B are connected with resistance R 19, and resistance R 19 is connected with diode D9 negative electrode again; The anode of diode D2, diode D7, diode D9 connects to form the output circuit that closes power supply signal commonly used with the base stage of triode Q1 respectively; 13 pin by d type flip flop U1B are connected with resistance R 9, and resistance R 9 connects to form the output circuit that closes the stand-by power supply signal with the base stage of triode Q2 again;

Be connected the anti-jamming circuit that composes in parallel by RC respectively between 8 pin of 6 pin of 8 pin of 6 pin of above-mentioned U1A, 4 pin, U1B, 10 pin, U2A, 4 pin, U2B, 10 pin and the ground;

Described automatic conversion and control partly comprises: 2 pin manual, conversion selecting switch SB4 automatically are connected with diode D10 ' as the input signal of manually controlling selection, and 2 pin of SB4 are connected with resistance R 3 ', are composed in series the manual switch indication with light-emitting diode D4 ' again; Manually, automatically 3 pin of conversion selecting switch SB4 are connected with resistance R 4 ' and are composed in series automatic conversion with light-emitting diode D3 ' again and indicate; Runback, be equipped with conversion selecting switch SB5 and diode D18 ', resistance R 2 ', light-emitting diode D6 ', resistance R 1 ', light-emitting diode D5 ' mutually and connect to form runback or change indicating circuit mutually fully; Power detection signal commonly used is connected with resistance R 7 ', more respectively with runback, conversion selecting switch SB5 and triode Q3 ' base stage are connected fully mutually, 13 pin of the collector electrode AND U3D of triode Q3 ' connect to form hauls oneself willingly into the runback control circuit; Secondary limit switch signal is connected with resistance R 5 ' and connects to form stand-by power supply combined floodgate indicating circuit with light-emitting diode D2 '; Main limit switch signal is connected with resistance R 6 ' to connect to form with light-emitting diode D1 ' again uses power supply combined floodgate indicating circuit always; Commonly used, stand-by power supply detection signal is connected with diode D7 ', diode D8 ' respectively, be connected with diode D9 ', resistance R 9 ', diode D9 ' negative electrode connection adjustable potentiometer R16 ', capacitor C 2 ', resistance R 10 ', triode Q1 ', triode Q2 ', resistance R 11 ', resistance R 12 ', resistance R 13 ' connect to form conversion delay circuit again; 1 pin of power detection signal AND U3A commonly used connects, 2 pin of the detection signal AND U3A of stand-by power supply connect, 3 pin of NOR gate U3A are connected with diode D13 ', be connected with conversion delay circuit with diode D14 ', diode D10 ', diode D11 ', diode D12 ', diode D13 ' again, connect to form automatic switching circuit with 6 pin of NOR gate U3B, 9 pin of NOR gate U3C, 12 pin of NOR gate U3D then.

The invention has the beneficial effects as follows: the The whole control circuit has only just been realized the logic control function of double power supply automatic transfer switch with two two principal and subordinate's diode d type flip flops and a slice 42 input NOR gate.The great advantage of this control circuit is to use minimum components and parts to realize all functions of double power supply automatic transfer switch; and two principal and subordinate's diode d type flip flops that use and 42 input NOR gate are the most basic integrated circuit (IC) chip; price is low; ample supply and prompt delivery on the market; manufacture simply, easily form large-scale production.

In a word, use in this control device circuit that components and parts are few, volume is little, function is complete, cost is low, stable and reliable for performance.Its circuit is simple, and is reasonable in design, easy to use, is widely used.

Description of drawings

Fig. 1 is that circuit of the present invention is formed block diagram;

Fig. 2 is control circuit catenation principle figure of the present invention.

Among the figure: I represents automatic conversion and control part, and II represents the manual switch control section.

SB1-power supply commonly used closes button (only working) when double-electric source automatic change-over switch controller is in manual state.

SB2-stand-by power supply closes button (only working) when double-electric source automatic change-over switch controller is in manual state.

SB3-two minutes button (all effective) no matter double power supply automatic transfer switch is in the automatic/hand state, when double power supply automatic transfer switch is in two branch state, double power supply automatic transfer switch can only closing by hand to normal/stand-by power supply.

Toggle switch SB4-hand, automatic conversion selecting switch, when options button is placed manual position, " two branch " of controller, " power supply commonly used closes ", " stand-by power supply closes " pushbutton, " runback-be equipped with mutually " options button is inoperative; When options button placed automated location, switch selected conversion to drop into automatically, " runback-be equipped with mutually " options button, " two branch " pushbutton, and " power supply commonly used closes ", " stand-by power supply closes " button are inoperative.

Toggle switch SB5-runback, be equipped with conversion selecting switch mutually, runback refers to haul oneself willingly into runback, when power supply commonly used occurred/under-voltage, decompression or open phase fault after the switch automatic put-in spair power source, no matter whether normal etc. the normal back of power up commonly used stand-by power supply, switch all will automatically restore to power supply commonly used.Refer to fully mutually throw mutually automatically, switch selects normal power source to put into operation automatically, and this function is the function that we develop voluntarily and set up, and this function is to be based upon under the standby each other prerequisite of two-way power supply to set up.In the actual engineering design, the Circuits System design more than 90% all is to be designed to the duplicate supply double loop standby.Automatically be exactly fully mutually behind one road power failure switch just be transformed into another road power supply power supply automatically, make the standby each other power supply reliability that improved greatly of two-way power supply.

J1-connect is commonly used, A, the B of stand-by power supply, C three-phase.

J2-connect is commonly used, the N of stand-by power supply and the control motor of double power supply automatic transfer switch.

J3-the connect limit switch of double power supply automatic transfer switch.

J4-connect external control terminal (priority of wherein fire-fighting signal controlling terminal is the highest, no matter double power supply automatic transfer switch is in manually still under the auto state, as long as the just execution of fire-fighting signal is arranged).

Diode D1 '-power supply combined floodgate indicator light commonly used.

Diode D2 '-stand-by power supply combined floodgate indicator light.

Diode D3 '-hand/select manual state to indicate automatically.

Diode D4 '-hand/select auto state to indicate automatically.

Diode D5 '-runback/alternative runback state indication mutually.

Diode D6 '-runback/alternative is equipped with the state indication mutually mutually.

Resistance R 16 '-can regulate double power supply automatic transfer switch under auto state, the time of conversion when breaking down.

Embodiment

Below in conjunction with accompanying drawing and preferred embodiment, to according to embodiment provided by the invention, structure, details are as follows for feature:

Referring to Fig. 1, Fig. 2, a kind of double-electric source automatic change-over switch controller, this circuit comprises control circuit, its input receives fire-fighting signal, external control, limit switch signal, control circuit links to each other with power sense circuit commonly used, stand-by power supply testing circuit respectively, be connected with the control circuit power supply simultaneously, the control circuit output connects double power supply automatic transfer switch; It is characterized in that control circuit is connected to form by automatic conversion and control part (I of Fig. 2) and manual switch control section (II of Fig. 2); The manual switch control section comprises outer input signal end J3, J4 and control button SB1, SB2, SB3 respectively and connecting resistance R3, capacitor C 9, resistance R 7, capacitor C 12, C10, resistance R 8, capacitor C 11, resistance R 10, capacitor C 15, resistance R 12, capacitor C 17, resistance R 15, capacitor C 16, resistance R 18, capacitor C 18, resistance R 20 is as anti-jamming circuit, by J4 and resistance R 2, diode D1, voltage-stabiliser tube DY1, diode D8, resistance R 22, voltage-stabiliser tube DY2 connects as the fire-fighting signal input circuit, by resistance R 4, diode D2, resistance R 13, diode D7, resistance R 19, diode D9, triode Q1, Q2, diode D32, D33, relay K 2, K3, piezo-resistance RY1 connects drive circuit and the control button SB1 as double power supply automatic transfer switch control motor, SB2, SB3, resistance R 1, R11, R14, R17, R5, R21, capacitor C 13, C14, C19, C20, diode D3, D4, D5, D6, splicing ear J3, resistance R 5 ', R6 ', diode D1 ', diode D2 ', d type flip flop U1A, U1B, U2A, U2B connects to form; Automatically conversion and control partly comprises diode D7 ', D8 ', D9 ', resistance R 9 ', R16 ', capacitor C 2 ', resistance R 10 ', R11 ', R12 ', triode Q1 ', Q2 ', resistance R 13 ' connects as delay circuit, toggle switch SB4, resistance R 3 ', R4 ', diode D3 ', D4 ' connects as hand/change automatically indicating circuit, toggle switch SB5, resistance R 1 ', R2 ', diode D5 ', D6 ', D18 ' connects as runback/change fully mutually indicating circuit and diode D14 ', D10 ', D11 ', D12 ', D13 ', D15 ', D16 ', D17 ', resistance R 7 ', R8 ', triode Q3 ', capacitor C 1 ', NOR gate U3A, U3B, U3C, U3D connects to form.

In sum, control circuit is that 4013 two principal and subordinate's diode d type flip flop U1, U2 are that 4,001 42 input NOR gate U3 are connected with a slice model by two models mainly, has realized the logic control of double power supply automatic transfer switch.

Transfer principle is as follows automatically under auto state for double-electric source automatic change-over switch controller:

When toggle switch SB4 is a high level at 6 pin of manual position: U3B, 9 pin of U3C, 12 pin of U3D, no matter commonly used/stand-by power supply breaks down, 11 pin of 4 pin of U3B, 10 pin of U3C, U3D do not have automatic switching signal output.

When toggle switch SB4 at automated location: toggle switch SB5 is during in the runback position, if power failure commonly used (power detection signal commonly used is a low level), stand-by power supply normal (the stand-by power supply detection signal is a high level) then 8 pin, the U3D of U3C 13 pin high level then the 11 pin output low levels of 10 pin, the U3D of the U3C signal that closes power supply commonly used be blocked.The 5 pin low levels of U3B, as long as double power supply automatic transfer switch is two minutes positions, then to be that high level closes the stand-by power supply signal effective for 4 pin of U3B.If power supply commonly used normal (power detection signal commonly used is a high level), the 5 pin high level of U3B, then 4 pin of U3B are that the signal that low level is closed stand-by power supply is blocked.13 pin of U3D are low level, no matter stand-by power supply is normally still undesired, as long as double power supply automatic transfer switch is at two minutes states, then 11 pin of U3D are that high level closes that to use power supply signal always effective.If commonly used/stand-by power supply is all undesired, 1,2 pin of U3A are low level, then 12 pin of 9 pin of 6 pin of 3 pin of U3A, U3B, U3C, U3D are high level, and then 11 pin of 10 pin of 4 pin of U3B, U3C, U3D are low level all, and the signal that closes commonly used/stand-by power supply is blocked.

When toggle switch SB4 at automated location: toggle switch SB5 is when being equipped with the position mutually; no matter the normal or 13 pin high level of undesired U3D of power supply commonly used; then 11 pin of U3D are low level; if double power supply automatic transfer switch is at the stand-by power supply state; power supply then commonly used is normal, and double power supply automatic transfer switch can not forward power supply commonly used to.With regard to this point and toggle switch SB4 at automated location: the operation principle of toggle switch SB5 during in the runback position is different, and other operation principles and toggle switch SB4 are at automated location: toggle switch SB5 during in the runback position operation principle identical.

Double-electric source automatic change-over switch controller transfer principle under manual state is as follows:

Press when closing power supply control button SB1 commonly used, 6 pin of U1A and 10 pin of U1B are high level, then 2 pin of U1A are low level, 13 pin of U1B are low level, relay K 2 adhesives, relay K 3 is failure to actuate, control driven by motor double power supply automatic transfer switch changes to power supply commonly used, when forwarding power supply master limit signal commonly used to is high level, and 4 pin of U1A and 8 pin of U1B are high level, and then 2 pin of U1A are high level, 13 pin of U1B are low level, relay K 2 discharges, and K3 is failure to actuate, and the control motor stops operating.

Press when closing stand-by power supply control button SB2,6 pin of U2A and 8 pin of U1B are high level, and then 13 pin of U1B are high level, and 2 pin of U2A are low level, relay K 2, K3 adhesive, control driven by motor double power supply automatic transfer switch is incorporated into stand-by power supply, is high level when forwarding the secondary limit signal of stand-by power supply to, and 4 pin of the 10 pin U2A of U1B are high level, then 13 pin of U1B are low level, 2 pin of U2A are high level, and relay K 2, K3 discharge, and the control motor stops operating.

When two minutes button SB3 press, 8 pin of U2B are high level, then 12 pin of U2B are low level, then relay K 1 adhesive, if double power supply automatic transfer switch is at power supply commonly used, then main limit signal is a high level, 8 pin of U1B are high level, and then 13 pin of U1B are high level, relay K 3 adhesives, control driven by motor double power supply automatic transfer switch changes toward two positions of dividing, when two branchs positions two branch limit signal of making a detour is a high level, 10 pin of U2B are high level, and then 12 pin of U2B are high level, relay K 1 discharges, and the control motor stops operating.If double power supply automatic transfer switch is at stand-by power supply, then secondary limit signal is a high level, 13 pin of U1B and 4 pin of U2A are high level, and then 13 pin of U1B are low level, and relay K 3 is failure to actuate, control driven by motor double power supply automatic transfer switch changes toward two positions of dividing, when two branchs positions two branch limit signal of making a detour is a high level, 10 pin of U2B are high level, and then 12 pin of U2B are high level, relay K 1 discharges, and the control motor stops operating.

Wherein the input signal end has all added resistance R capacitor C anti-jamming circuit (resistance R 3, capacitor C 9 has connect 6 pin of U1A outside each, resistance R 7, capacitor C 12 connect 4 pin of U1A, capacitor C 10, resistance R 8 connect 8 pin of U1B, capacitor C 11, resistance R 10 connect 10 pin of U1B, capacitor C 15, resistance R 12 connect 6 pin of U2A, capacitor C 17, resistance R 15 connect 4 pin of U2A, capacitor C 16, resistance R 18 connect 8 pin of U2B, capacitor C 18, resistance R 20 connect 10 pin of U2B), by our test in actual applications, this circuit has very strong antijamming capability.

Above-mentioned with reference to embodiment to the detailed description that double-electric source automatic change-over switch controller carries out, be illustrative rather than determinate, therefore, should belong to protection scope of the present invention in the variation and the modification that do not break away under the general plotting of the present invention.

Claims (1)

1. double-electric source automatic change-over switch controller, this circuit comprises control circuit, its input receives fire-fighting signal, external control signal, limit switch signal, control circuit links to each other with power sense circuit commonly used, stand-by power supply testing circuit respectively, be connected with the control circuit power supply simultaneously, the control circuit output connects double power supply automatic transfer switch; It is characterized in that control circuit is connected to form by following automatic conversion and control part and manual switch control section:

The composition of described manual switch control section comprises: 7 pin of external control signal input terminal J4 are connected with diode D1 anode with voltage-stabiliser tube DY1 negative electrode respectively by resistance R 2, form fire-fighting and close the input circuit of signal, diode D1 negative electrode is connected with control button SB1, be connected with resistance R 1 again, form the input circuit that closes power supply signal commonly used and be connected with 6 pin of d type flip flop U1A; Control button SB2 connects resistance R 11 and forms the input circuit that closes the stand-by power supply signal, links to each other with 6 pin of d type flip flop U2A and the anode of diode D4 respectively again, and the negative electrode of diode D4 is connected with 8 pin of d type flip flop U1B; 6 pin of external control signal input terminal J4 connect to form the input circuit of fire-fighting sub-signal respectively with voltage-stabiliser tube DY2 negative electrode and diode D8 anode by resistance R 22; Control button SB3 is connected with diode D8 negative electrode, and the input circuit that connects the two sub-signals of resistance R 17 compositions again is connected with 8 pin of d type flip flop U2B; 2 pin of the input terminal J3 of limit switch signal connect resistance R 5 and form main limit switch signal input circuit, be connected with 4 pin of d type flip flop U1A again, 3 pin of the input terminal J3 of limit switch signal connect diode D6 anode and resistance R 14 respectively, form the input circuit of the secondary limit switch signal of two-way, be connected with 10 pin of d type flip flop U1B and 4 pin of d type flip flop U2A respectively again; 1 pin of the input terminal J3 of limit switch signal is connected with resistance R 21, forms two input circuits of limit switch signal that divide and is connected with 10 pin of d type flip flop U2B; 2 pin of d type flip flop U1A are connected with resistance R 4, and resistance R 4 is connected with diode D2 negative electrode again; 2 pin of d type flip flop U2A are connected with resistance R 13, and resistance R 13 is connected with diode D7 negative electrode again; 12 pin of d type flip flop U2B are connected with resistance R 19, and resistance R 19 is connected with diode D9 negative electrode again; The anode of diode D2, diode D7, diode D9 connects to form the output circuit that closes power supply signal commonly used with the base stage of triode Q1 respectively; 13 pin by d type flip flop U1B are connected with resistance R 9, and resistance R 9 connects to form the output circuit that closes the stand-by power supply signal with the base stage of triode Q2 again;

Be connected the anti-jamming circuit that composes in parallel by RC respectively between 8 pin of 6 pin of 8 pin of 6 pin of above-mentioned U1A, 4 pin, U1B, 10 pin, U2A, 4 pin, U2B, 10 pin and the ground;

Described automatic conversion and control partly comprises: 2 pin manual, conversion selecting switch SB4 automatically are connected with diode D10 ' as the input signal of manually controlling selection, and 2 pin of SB4 are connected with resistance R 3 ', are composed in series the manual switch indication with light-emitting diode D4 ' again; Manually, automatically 3 pin of conversion selecting switch SB4 are connected with resistance R 4 ' and are composed in series automatic conversion with light-emitting diode D3 ' again and indicate; Runback, be equipped with conversion selecting switch SB5 and diode D18 ', resistance R 2 ', light-emitting diode D6 ', resistance R 1 ', light-emitting diode D5 ' mutually and connect to form runback or change indicating circuit mutually fully; Power detection signal commonly used is connected with resistance R 7 ', more respectively with runback, conversion selecting switch SB5 and triode Q3 ' base stage are connected fully mutually, 13 pin of the collector electrode AND U3D of triode Q3 ' connect to form hauls oneself willingly into the runback control circuit; Secondary limit switch signal is connected with resistance R 5 ' and connects to form stand-by power supply combined floodgate indicating circuit with light-emitting diode D2 '; Main limit switch signal is connected with resistance R 6 ' to connect to form with light-emitting diode D1 ' again uses power supply combined floodgate indicating circuit always; Commonly used, stand-by power supply detection signal is connected with diode D7 ', diode D8 ' respectively, be connected with diode D9 ', resistance R 9 ', diode D9 ' negative electrode connection adjustable potentiometer R16 ', capacitor C 2 ', resistance R 10 ', triode Q1 ', triode Q2 ', resistance R 11 ', resistance R 12 ', resistance R 13 ' connect to form conversion delay circuit again; 1 pin of power detection signal AND U3A commonly used connects, 2 pin of the detection signal AND U3A of stand-by power supply connect, 3 pin of NOR gate U3A are connected with diode D13 ', be connected with conversion delay circuit with diode D14 ', diode D10 ', diode D11 ', diode D12 ', diode D13 ' again, connect to form automatic switching circuit with 6 pin of NOR gate U3B, 9 pin of NOR gate U3C, 12 pin of NOR gate U3D then.

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