CN100578707C - Relay system with relative better arc protective circuit and its control method - Google Patents
Relay system with relative better arc protective circuit and its control method Download PDFInfo
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- CN100578707C CN100578707C CN200610068378A CN200610068378A CN100578707C CN 100578707 C CN100578707 C CN 100578707C CN 200610068378 A CN200610068378 A CN 200610068378A CN 200610068378 A CN200610068378 A CN 200610068378A CN 100578707 C CN100578707 C CN 100578707C
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Abstract
The present invention discloses a relay system with are protection circuit and its control method. Said relay system with are protection circuit includes load with first end and second end, relay coupled with common ground point and first end of load, and are protection circuit for eliminating are produced by said relay. Said are protection circuit includes an energy storage element, it has first end and second end, and parallel-connected with said relay, the first end of said energy storage element is coupled with first end of said load and is used for storing and releasing energy; and a high impedance element, it is coupled with second end of said load and is used for making said energy storage element attain the goal of quickly charging and slowly discharging.
Description
Technical field
The present invention relates to a kind of relay protection circuit and control method thereof that is used to eliminate the electric arc that relay produces, particularly a kind of arc protection circuit with preferable relatively effect and control method thereof of relay system.
Background technology
Relay is an indispensable element on general the application; but have the puzzlement of the withstand voltage deficiency of relay often; perhaps the direct current that flows through because of relay is bigger; and cause electric arc to take place; the lighter causes shorten the useful life of relay tip; weight person then causes the contact of relay to melt down, and more serious has danger on fire, and causes security incident.When another kind of situation rose for the working voltage when relay tip, the electric current that will cause relay to bear seriously descended, and the lighter takies small product size but can't reach the expection requirement, and weight person must be modified as more numerous and diverse circuit because of this relay can't use.Therefore the relay protection circuit of inventing the elimination electric arc with preferable relatively effect is necessary.
General known relay arc protection circuit majority is installed at the two ends of relay escape contact; its occupation mode is nothing more than the arc protection circuit with resistance (R), the arc protection circuit etc. that has the arc protection circuit of resistance capacitance (RC) and have diode (D), but still can't make relay effectively break away from trip point under big direct voltage and electric current.Also have the problem that can't effectively reach complete use according to the relay specification.
Based on above consideration; the present invention uses the protective circuit that only has two simple components such as high-impedance component and energy-storage travelling wave tube; just can make relay operation in the maximum specification scope, can solve the electric arc problem again, to avoid the generation of product cost increase and security incident.
When general relay uses in electric power system the isolating switch of power output end (for example as), the most irritating problem is exactly how to eliminate electric arc, and the electric arc of the most just eliminating DC power supply and being produced of difficulty wherein.Especially when voltage that the voltage at relay tip (connector) two ends can bear greater than relay, often therefore must reduce the contact voltage of this relay, or seek the higher element of voltage withstand class, to prevent security incident or client device outage problem.For eliminating the electric arc that direct voltage produced, present general way has for example following several known protective circuits and is suggested:
As shown in Figure 1, it is the relay system 1 that comprises the arc protection circuit with resistance capacitance.This arc protection circuit 11 with resistance capacitance has resistance R 1 and capacitor C 1; be one another in series; and be connected in the escape contact two ends of this relay X1 in parallel; this circuit is except need are paid special attention to the resistance value size of R1; when continuous joining and disengaging, still have and eliminate the incomplete phenomenon of electric arc, so that the result who causes the contact of relay X1 to melt down; especially when the voltage of relay X1 contact during greater than the specification of relay X1, then this protective circuit 11 can lose function fully.
As shown in Figure 2, it is the relay system 2 of traditional arc protection circuit with electric capacity.This arc protection circuit 21 with electric capacity has capacitor C 1; be connected in the escape contact two ends of this relay X1 in parallel, if when having big electric arc to produce, this capacitor C 1 will soon be filled full; eliminate the incomplete result of electric arc and produce, so that cause the contact meltdown phenomenon of this relay X1.
As shown in Figure 3; it is the relay system 3 of traditional arc protection circuit with two contact series relay; it comprises two relays (X1 and X2), and makes its contact series connection with the arc protection circuit 31 that formation has two contact series relay, is used to eliminate electric arc.Fig. 4 then is the relay system 4 of the traditional arc protection circuit with double-gate (cutter) contact series relay, and it comprises the have double-gate relay (X1) of (cutter), as the arc protection circuit 41 with double-gate (cutter) contact series relay.Described arc protection circuit 31 and 41 as shown in Figure 3 and Figure 4 all can be used to eliminate electric arc.This arc protection circuit 31 that the contact series connection of two relays of use is constituted though can solve the electric arc problem, also derives small product size relatively and becomes big, and the problem of cost increase.And double-gate (cutter) relay that uses Fig. 4 is done this arc protection circuit 41 that the contact series connection constituted and is eliminated electric arc, and its shortcoming is also arranged, and promptly can't use in having the circuit of relatively large electric current; Because at present the restriction of itself element of the relay of double-gate (cutter) contact causes it can't be used in the circuit with relatively large electric current.
Summary of the invention
Main purpose of the present invention is to provide a kind of relay protection circuit and control method thereof with preferable relatively inhibition direct-current arc effect; need can be applicable to relative large-scale relay than high working voltage; perhaps as the output of isolating switch use at power circuit; to avoid producing the phenomenon that relay tip melts down, maybe must reduce the problem that operating voltage is used this relay because of the voltage that the relay tip both end voltage can bear greater than the specification of this relay.
Another main purpose of the present invention is to provide a kind of relay system with arc protection circuit, comprises: load, DC power supply, arc protection circuit and relay; This load has first end and second end; This DC power supply comprises positive terminal and negative pole end, and this positive terminal is coupled in second end of this load, and this negative pole end is coupled in common ground point; This arc protection circuit is used to eliminate the electric arc that this relay produces, this arc protection circuit comprises: energy-storage travelling wave tube, be used for the storage and the release of energy, this energy-storage travelling wave tube has first end and second end, and first end of this energy-storage travelling wave tube is coupled in first end of this load; And high-impedance component, be coupled in second end of this load, be used to make this energy-storage travelling wave tube to realize quick charge and discharge at a slow speed, first end of this high-impedance component is coupled in second end of this load, and second end of this high-impedance component is coupled in second end of this energy-storage travelling wave tube; This relay comprises the escape contact, have normal opened contact, normally closed contact and common junction, connect this normal opened contact and this common junction to constitute first loop and to form the unlatching of this relay, perhaps connect this normally closed contact and this common junction to constitute second loop and to form the shutoff of this relay, this normal opened contact and this normally closed contact are coupled in this energy-storage travelling wave tube, and this common junction is coupled in this common ground point.
According to above-mentioned scheme, this relay also comprises control coil, and this control coil is used to control the switching of this escape contact to constitute this first loop or this second loop.
According to above-mentioned scheme, this relay system also comprises the relay switch control circuit, is used to control the unlatching and the shutoff of this relay, comprising: diode, have anode and negative electrode, and be connected in parallel in this control coil; First resistance has first end and second end, and this first end is coupled in the negative electrode of this diode, and this second end is coupled in second end of this high-impedance component; And switch, having first end and second end, this first end is coupled in the anode of this diode, and this second end is coupled in this common ground point.
According to above-mentioned scheme, this diode is the coil diode of releasing.
According to above-mentioned scheme, this relay system also comprises: bleeder circuit, be connected in series between this high-impedance component and this energy-storage travelling wave tube, and be used to receive the shunting signal of electric current of this high-impedance component of flowing through, and output signal is provided; And warning system, have first end and second end, first end of this warning system is coupled in second end of this energy-storage travelling wave tube, and second end of this warning system is coupled in this bleeder circuit, perhaps second end of warning system is coupled in second end of this energy-storage travelling wave tube, and first end of warning system is coupled in this bleeder circuit, when being used for this relay escape, sends alarm signal.
According to above-mentioned scheme, this warning system also comprises: the warning contact, have first end and second end, and be used for when the relay escape, produce alarm signal; And alarm relay, have control coil, normal opened contact, normally closed contact and common junction, this control coil is coupled in first end and second end of this warning system, first end and this normal opened contact that this normally closed contact is coupled in this warning contact are open circuit, perhaps this normally closed contact is first end that open circuit and this normal opened contact are coupled in this warning contact, and this common junction is coupled in second end of this warning contact.
According to above-mentioned scheme, this relay and this alarm relay all are compound relay (changeover relay).
According to above-mentioned scheme, this bleeder circuit comprises: second resistance have first end and second end, and this first end is coupled in second end of this high-impedance component; The 3rd resistance has first end and second end, and this first end is coupled in first end of this second resistance, and this second end is coupled in second end of this second resistance; And tunnel diode, having anode and negative electrode, this negative electrode is coupled in second end of the 3rd resistance, and this anode is coupled in second end of this energy-storage travelling wave tube, and this tunnel diode is connected in parallel in the control coil of this alarm relay.
According to above-mentioned scheme, this high-impedance component is diode or the 4th resistance, and the 4th resistance has relative high value.
According to above-mentioned scheme, this energy-storage travelling wave tube is an electric capacity.
According to above-mentioned scheme, this DC power supply is used to provide voltage.
Another main purpose of the present invention is to provide a kind of control method with relay system of arc protection circuit, and wherein this relay system comprises: load is in starting state; Arc protection circuit has energy-storage travelling wave tube, is coupled in this load; High-impedance component is coupled in this energy-storage travelling wave tube; And relay, this energy-storage travelling wave tube that is connected in parallel, this method comprises the following step: (a) when this relay is in off state, this energy-storage travelling wave tube is charged to saturation voltage; (b) when this relay when this off state switches to opening, this energy-storage travelling wave tube discharges through this high-impedance component, and when this relay was in this opening, voltage was added on the relay in the reverse voltage mode on this energy-storage travelling wave tube, in order to eliminate the electric arc of this relay; (c) when this relay is in opening, this energy-storage travelling wave tube is charged to produce magnitude of voltage; When (d) being in escape when this relay switching state, this energy-storage travelling wave tube forms discharge loop through this relay, and makes this relay have reverse voltage to eliminate electric arc; And (e) when this relay is in off state, then come back to step (a).
According to above-mentioned scheme, this relay system also comprises DC power supply, have positive terminal and negative pole end, this positive terminal is coupled in this load, this negative pole end is coupled in this energy-storage travelling wave tube and common ground point, and this step (a) also comprises the following step: (a1) when energy-storage travelling wave tube charges, the positive terminal of this power supply forms first charge circuit through this load, this energy-storage travelling wave tube, this relay to the negative pole end of this power supply certainly.
According to above-mentioned scheme, this step (b) also comprises the following step: (b1) this energy-storage travelling wave tube forms discharge loop to discharge through this load and this high-impedance component certainly; (b2) when this relay is in this opening, polarity of voltage moment of this energy-storage travelling wave tube is reverse, has reverse voltage on this relay and make; And (b3) when this relay normally is in this opening, make this power positive end form main big current circuit and conducting to this power-is extreme through this load, this relay.
According to above-mentioned scheme, this step (c) also comprises the following step: (c1) this power positive end extremely forms second charge circuit to charge through this high-impedance component, this energy-storage travelling wave tube, this relay to this power-certainly; And (c2) when this relay normally is in opening, make this also conducting simultaneously of main big current circuit.
According to above-mentioned scheme, this relay system also comprises warning system, be used for when this relay takes place to turn-off, sending alarm signal, this warning system comprises: bleeder circuit, be connected in series between this energy-storage travelling wave tube and this high-impedance component, this bleeder circuit comprises: resistance, have first end and second end, and first end of this resistance is coupled in this high-impedance component; And tunnel diode, its anode is coupled in this energy-storage travelling wave tube, and its negative electrode is coupled in second end of this resistance, and this warning system also comprises alarm relay, is connected in parallel in this tunnel diode.
According to above-mentioned scheme, this discharge loop in this step (b1) and this second charge circuit include this bleeder circuit.
According to above-mentioned scheme, this relay and this alarm relay are compound relay (changeover relay).
According to above-mentioned scheme, this relay comprises: normal opened contact is coupled in this energy-storage travelling wave tube; Normally closed contact is coupled in this energy-storage travelling wave tube; And common junction, it is extreme to be coupled in this power-, wherein when this relay is in this opening, this normal opened contact is connected with this common junction, and when this relay was in off state, this normally closed contact was electrically connected with this common junction, and when this relay is transformed into opening by this off state, voltage on this energy-storage travelling wave tube can be transformed into reverse voltage, and this reverse voltage makes this relay internal electric field strength reduction, and eliminates this electric arc.
In sum, relay system with arc protection circuit and control method thereof according to the present invention program have following advantage:
1, can not be subjected to the influence of relay tip voltage swing, can use the lowest high-current value of the specification of this relay equally, not need to reduce its withstand voltage specification owing to the existence of electric arc.
2, because the protective circuit of elimination electric arc proposed by the invention; only comprise high-impedance component and energy-storage travelling wave tube; so its with respect to the relay system of the known arc protection circuit that includes two contact series relay with include double-gate (cutter) relay and do the connect relay system of the arc protection circuit that constituted of contact; the relay system of the arc protection circuit that includes high-impedance component and energy-storage travelling wave tube proposed by the invention, the small product size and the relevant manufacturing cost that reduces this product that can relatively dwindle this relay system.
If 3, the relay system of the arc protection circuit that includes high-impedance component and energy-storage travelling wave tube proposed by the invention uses in power circuit, because its structure is simpler relatively, so can simplify circuit.
4, the relay system that comprises the arc protection circuit with high-impedance component and energy-storage travelling wave tube proposed by the invention has isolation features equally, can be used for output in the power circuit as isolating switch.
Description of drawings
The present invention more understands in depth with acquisition by following accompanying drawing and detailed description:
Fig. 1 shows the relay system that comprises the arc protection circuit with resistance capacitance;
Fig. 2 shows the relay system that comprises the arc protection circuit with electric capacity;
Fig. 3 shows the relay system that comprises the arc protection circuit with two contact series relay;
Fig. 4 shows the relay system of the arc protection circuit comprise (cutter) contact series relay that has double-gate;
Fig. 5 (a) shows the schematic diagram according to the electric current in loops such as the circuit of the preferred embodiment of the relay system of the arc protection circuit that has high-impedance component and energy-storage travelling wave tube comprising of the present invention program and its first charging/C1 discharge/the second charging;
Fig. 5 (b) shows the schematic diagram according to the electric current in loops such as the main circuit of the preferred embodiment of the relay system of the arc protection circuit that has high-impedance component and energy-storage travelling wave tube comprising of the present invention program and its first charging/C1 discharge;
Fig. 6 (a) shows the schematic diagram according to the electric current in the circuit of the preferred embodiment of the relay system of the arc protection circuit that has high-impedance component and energy-storage travelling wave tube comprising of the present invention program and its second charging/loop such as main big electric current; And
Fig. 6 (b) shows the schematic diagram according to the electric current in the main circuit of the preferred embodiment of the relay system of the arc protection circuit that has high-impedance component and energy-storage travelling wave tube comprising of the present invention program and its first charging/the second charging/main big electric current/loops such as discharge.
Wherein, description of reference numerals is as follows:
1 comprises the relay system of the arc protection circuit with resistance capacitance
11 have the arc protection circuit of resistance capacitance
2 comprise the relay system of the arc protection circuit with electric capacity
21 have the arc protection circuit of electric capacity
3 comprise the relay system of the arc protection circuit with two contact series relay
31 have the arc protection circuit of two contact series relay
4 comprise the relay system of the arc protection circuit of (cutter) contact series relay that has double-gate
41 have the arc protection circuit of double-gate (cutter) contact series relay
5 comprise the relay system of the arc protection circuit with high-impedance component and energy-storage travelling wave tube
51 have the arc protection circuit of high-impedance component and energy-storage travelling wave tube
52 relays, 521 escape contacts, 522 control coils
53 relay switch control circuits, 54 warning systems, 541 alarm relaies
5411 escape contacts, 5412 control coils, 542 warning contacts
55 bleeder circuits
Embodiment
With reference to figure 5 (a), it shows the schematic diagram according to the electric current in loops such as the circuit of the preferred embodiment of the relay system of the arc protection circuit that has high-impedance component and energy-storage travelling wave tube comprising of the present invention program and its first charging/C1 discharge/the second charging.Wherein, this relay system 5 that comprises the arc protection circuit with high-impedance component and energy-storage travelling wave tube comprises: DC power supply V1, have positive terminal and negative pole end, and this negative pole end is coupled in common ground point; Load RL has first end and second end, and this second end is coupled in the positive terminal of this DC power supply V1; Arc protection circuit 51, relay 52, relay switch control circuit 53, warning system 54 and bleeder circuit 55 with high-impedance component and energy-storage travelling wave tube.Wherein, this has the arc protection circuit 51 of high-impedance component and energy-storage travelling wave tube, be used to eliminate the electric arc that this relay 52 is produced, arc protection circuit 51 comprises: energy-storage travelling wave tube (is depicted as capacitor C 1 as Fig. 5 (a), it also can be other different energy-storage travelling wave tube), be used for the storage and the release of energy; And high-impedance component (be the first diode DD1 shown in Fig. 5 (a), it also can be the resistance with relative high value), be used to make this energy-storage travelling wave tube to realize quick charge and discharge at a slow speed; This high-impedance component is coupled in second end of this load RL, and this energy-storage travelling wave tube is coupled in first end of this load RL.This relay 52 comprises escape contact 521 and control coil 522, the switching that control coil 522 is used to control this relay 5 is to form unlatching (turn-on) or to turn-off (turn-off), and wherein this escape contact 521 also comprises normal opened contact (NO), normally closed contact (NC) and common junction (C).When the normal opened contact (NO) of this relay 52 and common junction (C) fully during joining, form the unlatching of this relay 52, and when the complete joining of the normally closed contact (NC) of this relay 52 and common junction (C), then form the shutoff of this relay 52.Referring to Fig. 5 (a), wherein 521 contact 1 is the normal opened contact (NO) of relay, and 521 contact 2 is the normally closed contact (NC) of relay, and 521 contact 3 is the common junction (C) of relay, this contact 3 is coupled in this common ground point, and this contact 1 is coupled in first end of this load.In addition, this relay switch control circuit 53 is used to control opening and shutting off of this relay 52, this relay switch control circuit 53 comprises: the first resistance R D1, the second diode DD2 and switch SW 1, connection is one another in series, this first resistance R D1 is coupled in the negative electrode of this high-impedance component (this first diode DD1), this switch SW 1 is coupled in this common ground point, and this second diode DD2 is coupled in this control coil 522.In addition, this warning system 54 is used for producing alarm signal when this relay takes place to turn-off, and this warning system 54 comprises: alarm relay 541 and warning contact 542.Wherein this alarm relay 541 comprises: (it has first end and second end for escape contact 5411 and control coil 5412, that is to say first end and second end for this warning system 54), and this escape contact 5411 also comprises normal opened contact (NO), normally closed contact (NC) and common junction (C).Referring to Fig. 5 (a), the normal opened contact of this escape contact 5411 (NO) is the contact 1 of this escape contact 5411, this normally closed contact (NC) is a contact 2, and this common junction (C) is the contact 3 of this escape contact 5411, and wherein this contact 2 forms open circuit with this contact 3.This bleeder circuit 55 comprises: the second resistance R D2 and the 3rd resistance R D3 (RD2//RD3 that is connected in parallel with each other, described two parallel resistances also can be replaced by the single resistance that resistance equates), and tunnel diode ZD1, this control coil 5412 is connected in parallel, its negative electrode is connected in series in this second resistance R D2 that is connected in parallel and the 3rd resistance R D3, and its anode is electrically connected on the contact 2 of this energy-storage travelling wave tube C1 and this escape contact 521.
Please referring again to Fig. 5 (a), wherein this this warning circuit 54 of relay system 5 with protective circuit of high-impedance component and energy-storage travelling wave tube can omit with this bleeder circuit 55.At this moment, this relay system 5 still can be brought into play its function of eliminating electric arc fully, but when the current value of this high-impedance component of flowing through (this first diode DD1) was zero, then this relay system 5 just can't send alarm signal.When this warning circuit 54 is omitted with this bleeder circuit 55, the negative electrode of this high-impedance component (this first diode DD1) and this energy-storage travelling wave tube (this capacitor C 1) coupling.
Control method about the relay system 5 of the arc protection circuit that has high-impedance component and energy-storage travelling wave tube according to this of the present invention program; now according to its operating principle, be described as follows one by one to Fig. 5 (b) and Fig. 6 (a) to the order of Fig. 6 (b) according to Fig. 5 (a).
Please refer to Fig. 5 (a) to Fig. 5 (b) and Fig. 6 (a) to Fig. 6 (b), with the control method of explanation according to the relay system 5 of the present invention program's protective circuit with high-impedance component and energy-storage travelling wave tube, wherein this relay system 5 also comprises: load RL is in starting state; Arc protection circuit 51 has energy-storage travelling wave tube C1, is coupled in this load RL; High-impedance component DD1 is coupled in this energy-storage travelling wave tube C1; And relay 52, this energy-storage travelling wave tube C1 that is connected in parallel (this relay system 5 also comprises certainly: DC power supply and above-mentioned elements such as relay switch control circuit 53, warning system 54 and bleeder circuit 55), this method comprises the following step:
1, (referring to Fig. 5 (a) to Fig. 5 (b)) is when this relay 52 forms when turn-offing (contact 2 (NC) of escape contact 521 and contact 3 (C) joining), and when this load starts, C1 one termination power negative pole end (connecting this common ground point), the other end is received power positive end (+), this moment, first charge circuit was by this power supply V1 (+) → RL → C1 → relay 52 (contact 2 of escape contact 521 and 3 joinings) → power supply V1 negative pole end, this power supply charges to saturated voltage V1 to this energy-storage travelling wave tube C1, and the loop that its electric current is flowed through is shown in " first charge circuit " of Fig. 5 (a) and Fig. 5 (b) (schematic diagram of the main circuit of the preferred embodiment that it shows for Fig. 5 (a) and the electric current of its first charging/C1 discharge loop);
2, when (consulting Fig. 5 (a) to Fig. 5 (b) and Fig. 6 (b)) switches to opening (contact 1 (NO) of this escape contact 521 and 3 (C) joining) and RL startup when this relay 52 by this off state (contact 2 (NC) of this escape contact 521 and 3 (C) joining), and C1 (+) → RL → DD1 → RD2//RD3 → ZD1//control coil 5412 → C1 (-) is the discharge loop of C1, the loop that its electric current is flowed through is shown in Fig. 5 (a) or Fig. 5 (b) " C1 discharge loop ", when this relay 52 is opened (contact 1 (NO) of this escape contact 521 and 3 (C) joining), second charge circuit is by this power supply (+) → DD1 → RD2//RD3 → ZD1//control coil 5412 → C1 → relay 52 (contact 1 (NO) of this escape contact 521 and 3 (C) joining) → power supply (-), shown in Fig. 5 (a) " second charge circuit ", when the moment that this relay 52 is opened, because this relay 52 makes during switching state C1 polarity of voltage moment reverse by escape, thereby make between the contact 1 (NO) of relay 52 and the contact 3 (NC) and have the electric arc that backward energy (or voltage) is eliminated this relay 52, at this moment, form main big current circuit by this power supply (+) → RL → this relay 52 (contact 1 (NO) of this escape contact 521 and 3 (C) joining) → power supply (-), the loop that its electric current is flowed through is shown in Fig. 6 (b) " main big current circuit ";
3, (as Fig. 6 (a) to Fig. 6 (b)) is when this relay 52 forms these openings (contact 1 (NO) of this escape contact 521 and 3 (C) joining) and this load when starting, C1 one termination power negative pole end, the other end is received the anode of tunnel diode ZD1, form second charge circuit: { power supply (+) → DD1 → RD2//RD3 → ZD1//control coil 5412 → C1 → this relay 52 (contact 1 (NO) of this escape contact 521 and 3 (C) joining) → power supply (-) }, make C1 produce voltage, the loop that its electric current is flowed through, shown in Fig. 6 (a) and Fig. 6 (b) (it is the main circuit and its first charging/the second charging/main schematic diagram of the electric current in electric current/loops such as discharge greatly of the preferred embodiment of Fig. 6 (a) demonstration) " second charge circuit ", at this moment, above-mentioned should also be switched on by main big current circuit, the loop that its electric current is flowed through is shown in Fig. 6 (b) " main big current circuit ".
4, (as Fig. 6 (a) to Fig. 6 (b)) switches to this off state (contact 2 (NC) of this escape contact 521 and 3 (C) joining) by this opening (contact 1 (NO) of this escape contact 521 and 3 (C) joining) when this relay 52, because these relay 52 escapes switch, at this moment DD1 reverse-conducting, C1 discharge off loop, thereby make C1 that enough energy be arranged, between the NO of this relay 52 and NC contact, produce the electric arc that backward energy (or voltage) is eliminated this relay 52, discharge loop is shown in " discharge loop " among Fig. 6 (b), if (just form this above-mentioned first charge circuit during complete joining between the NC of the escape contact 521 of this relay 52 and the C contact, the loop that its electric current is flowed through, as being somebody's turn to do shown in " first charge circuit " of Fig. 6 (b)), then get back to first step and restart.
In sum, have the device and the control method of relay system 5 of the protective circuit of high-impedance component and energy-storage travelling wave tube according to comprising of the present invention program, have following advantage:
1, can not be subjected to the influence of relay tip voltage swing, can use the lowest high-current value of the specification of this relay equally, not need to reduce its withstand voltage specification owing to the existence of electric arc.
2, because the protective circuit of elimination electric arc proposed by the invention; only comprise high-impedance component and energy-storage travelling wave tube; so its with respect to the relay system of the known arc protection circuit that includes two contact series relay with include double-gate (cutter) relay and do the connect relay system of the arc protection circuit that constituted of contact; the relay system of the arc protection circuit that includes high-impedance component and energy-storage travelling wave tube proposed by the invention, the small product size and the relevant manufacturing cost that reduces this product that can relatively dwindle this relay system.
If 3, the relay system of the arc protection circuit that includes high-impedance component and energy-storage travelling wave tube proposed by the invention uses in power circuit, because its structure is simpler relatively, so can simplify circuit.
4, the relay system that comprises the arc protection circuit with high-impedance component and energy-storage travelling wave tube proposed by the invention has isolation features equally, can be used for output in the power circuit as isolating switch.
By above narration as can be known; relay system and control method thereof according to the present invention program's the protective circuit that includes high-impedance component and energy-storage travelling wave tube; its principal character is the principle that this high-impedance component of utilization is done quick charge relatively and discharged at a slow speed this energy-storage travelling wave tube, eliminates this electric arc of this relay with backward energy stored on this energy-storage travelling wave tube (or voltage).It can be applicable to need relatively than the large-scale relay of high working voltage or is used in the output of power circuit as isolating switch, to avoid producing the phenomenon that relay tip melts down, perhaps must reduce the results such as operating voltage of this relay because of the voltage that the relay tip both end voltage can bear greater than the specification of this relay.
Therefore, even the present invention is described in detail by the above embodiments and can makes various modifications by the person skilled in the art, yet do not break away from the protection range of appended claims.
Claims (10)
1. the relay system with arc protection circuit comprises: load, DC power supply, arc protection circuit and relay;
This load has first end and second end;
This DC power supply comprises positive terminal and negative pole end, and this positive terminal is coupled in second end of this load, and this negative pole end is coupled in common ground point;
This arc protection circuit is used to eliminate the electric arc that this relay produces, and this arc protection circuit comprises:
Energy-storage travelling wave tube is used for the storage and the release of energy, and this energy-storage travelling wave tube has first end and second end, and first end of this energy-storage travelling wave tube is coupled in first end of this load; And
High-impedance component is coupled in second end of this load, is used to make this energy-storage travelling wave tube to realize quick charge and discharge at a slow speed, and first end of this high-impedance component is coupled in second end of this load, and second end of this high-impedance component is coupled in second end of this energy-storage travelling wave tube;
This relay comprises the escape contact, this escape contact has normal opened contact, normally closed contact and common junction, connect this normal opened contact and this common junction to constitute first loop and to form the unlatching of this relay, perhaps connect this normally closed contact and this common junction to constitute second loop and to form the shutoff of this relay, this normal opened contact is coupled in first end of this energy-storage travelling wave tube, this normally closed contact is coupled in second end of this energy-storage travelling wave tube, and this common junction is coupled in this common ground point.
2. relay system as claimed in claim 1, wherein this relay also comprises:
Control coil, this control coil are used to control the switching of this escape contact to constitute this first loop or this second loop.
3. relay system as claimed in claim 2 also comprises the relay switch control circuit, is used to control the unlatching and the shutoff of this relay, and this relay switch control circuit comprises:
Diode has anode and negative electrode, is connected in parallel in this control coil;
First resistance has first end and second end, and this first end is coupled in the negative electrode of this diode, and this second end is coupled in second end of this high-impedance component; And
Switch has first end and second end, and this first end is coupled in the anode of this diode, and this second end is coupled in this common ground point.
4. relay system as claimed in claim 3, wherein:
This diode is the coil diode of releasing; Or
This relay system also comprises:
Bleeder circuit is connected in series in this high-impedance component and this energy-storage travelling wave tube, is used for providing when this relay escape output signal; And
Warning system, have first end and second end, second end and this second end that this first end is coupled in this energy-storage travelling wave tube are coupled in this bleeder circuit, perhaps this second end second end and this first end of being coupled in this energy-storage travelling wave tube is coupled in this bleeder circuit, be used for when this relay escape, sending alarm signal, wherein:
This warning system also comprises:
The warning contact has first end and second end, is used for producing when this output signal is zero this alarm signal; And
Alarm relay, have control coil, normal opened contact, normally closed contact and common junction, this control coil is coupled in first end of this warning system and second end of this warning system, first end and this normal opened contact that this normally closed contact is coupled in this warning contact are open circuit, perhaps this normally closed contact is first end that open circuit and this normal opened contact are coupled in this warning contact, and this common junction is coupled in second end of this warning contact;
This relay and this alarm relay are compound relay;
This bleeder circuit comprises:
Second resistance has first end and second end, and this first end is coupled in second end of this high-impedance component;
The 3rd resistance has first end and second end, and this first end is coupled in first end of this second resistance, and this second end is coupled in second end of this second resistance; And
Tunnel diode has anode and negative electrode, and this negative electrode is coupled in second end of the 3rd resistance, and this anode is coupled in second end of this energy-storage travelling wave tube, and this tunnel diode is connected in parallel in the control coil of this alarm relay; And
This high-impedance component is diode or the 4th resistance, and the 4th resistance has relative high value.
5. relay system as claimed in claim 1, wherein:
This energy-storage travelling wave tube is an electric capacity; And
This DC power supply is used to provide voltage.
6. control method with relay system of arc protection circuit, wherein this relay system comprises: load is in starting state; Arc protection circuit has energy-storage travelling wave tube, is coupled in this load; High-impedance component is coupled in this energy-storage travelling wave tube; And relay, this energy-storage travelling wave tube that is connected in parallel, this method comprises the following step:
(a) when this relay is in off state, this energy-storage travelling wave tube is charged to saturation voltage;
(b) when this relay when this off state switches to opening, this energy-storage travelling wave tube is discharged by this high-impedance component, and when this relay is in this opening, make that voltage is added on this relay in the reverse voltage mode on this energy-storage travelling wave tube, in order to eliminate the electric arc of this relay;
(c) when this relay is in this opening, this energy-storage travelling wave tube is charged to produce magnitude of voltage;
When (d) being in escape, making this energy-storage travelling wave tube form discharge loop, and make this relay have reverse voltage to eliminate this electric arc by this relay when this relay switching state; And
(e) when this relay is in this off state, then come back to step (a).
7. control method as claimed in claim 6, wherein this relay system also comprises DC power supply, and this DC power supply has positive terminal and negative pole end, and this positive terminal is coupled in this load, this negative pole end is coupled in this energy-storage travelling wave tube and common ground point, and this step (a) also comprises the following step:
(a1) when energy-storage travelling wave tube charges, flow through this load, this energy-storage travelling wave tube, this relay to this negative pole end of this power supply of the positive terminal of this power supply forms first charge circuit certainly.
8. control method as claimed in claim 6, wherein this step (b) also comprises the following step:
(b1) flow through this load and this high-impedance component of this energy-storage travelling wave tube forms discharge loop to discharge certainly;
(b2) when this relay just has been in this opening, polarity of voltage moment of this energy-storage travelling wave tube is reverse, and makes this relay have this reverse voltage; And
(b3) when this relay normally is in this opening, make this power positive end form main big current circuit and conducting to this power-is extreme through this load, this relay.
9. control method as claimed in claim 8, wherein:
This step (c) also comprises the following step:
(c1) certainly this power positive end flow through this high-impedance component, this energy-storage travelling wave tube, this relay to extreme second charge circuit that forms of this power-to charge; And
(c2) when this relay normally is in this opening, make this also conducting simultaneously of main big current circuit.
10. control method as claimed in claim 9, wherein this relay system also comprises warning system, is used for sending alarm signal when this relay escape, and this warning system comprises:
Bleeder circuit is connected in series between this energy-storage travelling wave tube and this high-impedance component, and this bleeder circuit comprises:
Resistance has first end and second end, and this first end is coupled in this high-impedance component; And
Tunnel diode, the anode of this tunnel diode is coupled in this energy-storage travelling wave tube, and the negative electrode of this tunnel diode is coupled in second end of this resistance; And
Alarm relay is connected in parallel in this tunnel diode;
This discharge loop in this step (b1) and this second charge circuit include this bleeder circuit;
This relay and this alarm relay are compound relay; And
This relay comprises:
Normal opened contact is coupled in this energy-storage travelling wave tube;
Normally closed contact is coupled in this energy-storage travelling wave tube; And
Common junction, it is extreme to be coupled in this power-,
Wherein when this relay is in this opening, this normal opened contact is connected with this common junction, when this relay is in this off state, this normally closed contact is connected with this common junction, and when this relay is transformed into this opening by this off state, the voltage of this energy-storage travelling wave tube can be transformed into reverse voltage, and this reverse voltage makes this relay internal electric field strength reduction, and eliminates this electric arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610068378A CN100578707C (en) | 2006-03-30 | 2006-03-30 | Relay system with relative better arc protective circuit and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610068378A CN100578707C (en) | 2006-03-30 | 2006-03-30 | Relay system with relative better arc protective circuit and its control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101047072A CN101047072A (en) | 2007-10-03 |
| CN100578707C true CN100578707C (en) | 2010-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610068378A Expired - Fee Related CN100578707C (en) | 2006-03-30 | 2006-03-30 | Relay system with relative better arc protective circuit and its control method |
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| Country | Link |
|---|---|
| CN (1) | CN100578707C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103699024B (en) * | 2013-12-12 | 2016-04-20 | 北京京盾通商贸易有限公司 | Relay system |
| CN105845505B (en) * | 2016-06-14 | 2017-11-17 | 珠海英搏尔电气股份有限公司 | Electric car electric component assembly, relay switching circuit and its control method |
| CN110970961B (en) * | 2018-12-06 | 2021-06-08 | 宁德时代新能源科技股份有限公司 | Power consumption protection circuit |
| CN113422362B (en) * | 2021-06-29 | 2023-03-24 | 新疆金风科技股份有限公司 | High-voltage ride-through device, high-voltage ride-through method and wind power converter |
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2006
- 2006-03-30 CN CN200610068378A patent/CN100578707C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101047072A (en) | 2007-10-03 |
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