CN101807490A - Method and circuit for prolonging service life of relay and device - Google Patents
Method and circuit for prolonging service life of relay and device Download PDFInfo
- Publication number
- CN101807490A CN101807490A CN200910238981A CN200910238981A CN101807490A CN 101807490 A CN101807490 A CN 101807490A CN 200910238981 A CN200910238981 A CN 200910238981A CN 200910238981 A CN200910238981 A CN 200910238981A CN 101807490 A CN101807490 A CN 101807490A
- Authority
- CN
- China
- Prior art keywords
- relay
- contact
- control signal
- branch road
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Relay Circuits (AREA)
Abstract
The invention relates to a method for prolonging the service life of a relay, which comprises the following steps: enabling the current of the relay to be zero or approach to zero by changing the state of a branch at which a relay contact is positioned; enabling the relay contact to act; and recovering the state of the branch at which the relay contact is positioned. The invention also relates to a circuit for prolonging the service life of the relay and a device using the circuit. The method and the circuit for prolonging the service life of the relay and the device have the advantages that: by changing the state of the branch at which the relay contact is positioned before the relay contact acts, the current flowing through the contact is zero or basic zero, the chances of arc discharge can be greatly reduced, thereby the relay contact can not be accelerated to oxidize and the service life of the relay is prolonged.
Description
Technical field
The present invention relates to circuit field, more particularly, relate to a kind of relay method in useful life, circuit and device of improving.
Background technology
Relay uses very generally in electronic circuit, and is particularly in the control circuit to direct current or alternating current, common especially.When the contact of relay is connected with the load of using high voltage, because voltage is higher, when the relay contact Be Controlled is switched on or switched off, because the variation of distance, the phenomenon that arcing between the contact of above-mentioned relay, may occur, promptly when relay contact is switched on or switched off, may between its contact, strike sparks, spark occur by pressure reduction thereon.Like this, can bring the hidden danger on the safety on the one hand, cause fire easily; On the other hand, can make the contact be accelerated oxidation, on the contact, generate oxide layer, thereby make shorten the useful life of relay.
Summary of the invention
The technical problem to be solved in the present invention is, because relay contact arcing or sparking cause relay short defective in useful life, provide a kind of its contact that makes can arcing or method, circuit and the device in raising relay useful life of sparking at prior art above-mentioned.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of relay method in useful life that improves, comprise the steps:
A) change the state of described relay contact place branch road, to make it go up electric current be zero or approach zero;
B) make described appliance contact move;
C) state on the road of the described relay contact of recovery.
In method of the present invention, described steps A) changing described relay contacts place in props up line state and comprises it being that this branch road is disconnected or by bypass.
In method of the present invention, described steps A) line state first control signal that changes and second control signal of controlling described relay contact action are propped up in the described relay contact of control place in has same control device to produce, and the described first signal time started, the concluding time of described first control signal was later than the concluding time of second control signal in advance in the time started of second control signal.
In method of the present invention, more described second control signal of described first control signal shifts to an earlier date very first time output, and the described very first time comprises 0.1 second to 0.5 second.
The invention still further relates to a kind of relay circuit in useful life that improves, comprise the relay contact branch road that is connected with load, accept defeated second control signal of control device, change described relay coil electric current and make the relay of described relay contact action drive the control device of branch road and output control signal, it is characterized in that, comprise that also the electric current that is used for the feasible described contact of flowing through of state of its place, contact branch road of change before described relay contact action is zero or approaches zero switching branches, described switching branches is controlled by described control device.
In circuit of the present invention, described switching branches comprises and connects with described relay contact two ends, makes described contact by the controllable silicon branch road of bypass when receiving first control signal.
In circuit of the present invention, two switch terminals of described silicon controlled are connected on described two relay contacts, and its control end is electrically connected with first signal output part of described control device.
In circuit of the present invention, described switching branches comprises being serially connected in makes the controllable silicon branch road that described contact is disconnected in the described relay contact branch road, when receiving first control signal.
In circuit of the present invention, two switch terminals of described silicon controlled are connected and an end of load in the described contact respectively, and its control end is electrically connected with first signal input part of described control device.
The invention still further relates to a kind of device, comprise relay and drive circuit thereof, described driving branch road is above-mentioned driving branch road, and these drive in the branch road and comprise above-mentioned switching branches.
Implement raising relay of the present invention method, circuit and the device in useful life, has following beneficial effect: because before the relay contact action, just the state on its place, contact branch road is changed, thereby make the electric current of flowing through on this contact be zero or be zero substantially, significantly reduced the chance of arcing, thereby make relay contact can not be accelerated oxidation, improved relay useful life.
Description of drawings
To be that the present invention is a kind of improve the relay method in useful life, circuit and install method flow diagram among first embodiment Fig. 1;
Fig. 2 is the circuit block diagram of first embodiment of the invention;
Fig. 3 is the circuit theory diagrams of first embodiment of the invention;
Fig. 4 is the circuit block diagram of second embodiment of the invention;
Fig. 5 is the circuit theory diagrams of second embodiment of the invention.
Embodiment
Embodiments of the present invention is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, a kind ofly improve the relay method in useful life, circuit and install among first embodiment of the present invention, it comprises the steps:
Step S11 produces and changes the control signal that relay contact props up line state: receiving signal or its discovery when the control circuit at relay place has state variation need change the state of relay contact, for example this relay contact is changed into by closure and turn-offed or when changing into closure by shutoff, control circuit is not the drive signal as common direct output relay, change the electric current in the relay coil, thereby make the contacts status of relay change.But earlier by control signal of another one output interface output, this control signal changes the state on the above-mentioned relay contact branch road.In this step, when needs changed the relay contact state, output earlier changed the control signal that relay contact props up line state.
Does the step S12 very first time arrive? in this step, judge whether the control signal of above-mentioned change relay contact branch road has been kept a period of time, this time is the very first time.Keep the very first time if change the control signal of relay contact branch road, then carried out next step; If this control signal is not maintained to the above-mentioned very first time, then return this step, continue to wait for.
Step S13 produces the control signal that changes the relay contact state: in this step, above-mentioned change relay contact props up the control signal of line state and has kept the above-mentioned very first time, can think that above-mentioned control signal changes the state of relay contact branch road, state on the above-mentioned relay contact branch road is changed, and has not had electric current or electric current to approach zero on the relay contact.Therefore, in this step, the control signal of beginning output control relay contact, the i.e. drive signal of relay.This drive signal is sent in the coil of relay, when it changes electric current in relay coil, makes the state of contact of relay change.Because the electric current on the relay contact has been zero or has approached zero at this moment, so the phenomenon of arcing or sparking can not appear in the change of relay contact state.Make that this contact can accelerated oxidation, thereby make and obtain prolonging (situation that occurs sparking relatively) its useful life.
Does second time of step S14 arrive? in this step, whether second time of judging reaches, and in this way, carries out next step, as not, returns this step and waits for.Above-mentioned second time is to set in advance, is to begin to calculate after the control signal output by above-mentioned control relay contacts status.If above-mentioned second time reaches, can think that the contacts status of above-mentioned relay changes, can carry out next step action; If do not reach above-mentioned second time, think that then above-mentioned relay contact state also do not finish change, therefore, return this step, continue to wait for.
Step S15 finish to change the control signal that relay contact props up line state: in this step, meet Shu Shangshu and change the control signal that line state is propped up at the relay contact place, make the state of this relay contact branch road change the state when getting back to its operate as normal.
What deserves to be mentioned is that above steps should be in the position of a subprogram or subfunction in a control system.When this system operate as normal, it carries out its every function or control as usual.When needs change the relay contact state, carry out above-mentioned subprogram or call this function, carry out the relay contact state and change.After finishing above-mentioned change, withdraw from this subprogram or function, the retrieval system main program.
Present embodiment also relates to a kind of circuit, the first embodiment circuit block diagram shown in Fig. 2, and in Fig. 2, this circuit comprises that control device 21, relay coil drive branch road 22, switch drive branch road 23, relay 24 and switching branches 25.Wherein, relay 24 comprises coil 241 and the contact 242 that is connected with above-mentioned relay coil driving branch road 22, and the branch road that is connected with above-mentioned relay contact 242 is the relay contact branch road.In first embodiment, control device 21 drives branch road 22 by an IO interface and above-mentioned relay coil and is connected, this IO mouth is exported second control signal, drive the electric current that branch road 22 changes in the relay coil 241 by relay coil, thereby change the state (disconnecting or closure) of relay contact 242; Control device 21 also is connected with switch drive branch road 23 by another one IO port, this IO port is exported first control signal, by switch drive branch road 23, change the state of switching branches 25, make its switch connection, change the state of relay contact branch road, make that the electric current on relay contact is zero or approaches zero, be convenient to the relay contact action.In addition, as shown in Figure 2, above-mentioned switching branches 25 is attempted by on the relay contact 242, and relay contact is by bypass during its conducting.In this enforcement, described according to the method described above, control device 21 is in the time need making a change the state of relay contact 242, at first export above-mentioned first control signal, make switching branches 25 connect, relay contact 242 is by bypass, behind the certain hour (very first time), export second control signal, drive branch road 22 by relay coil, make that current status changes in the relay coil 241, thereby cause the state of relay contact 242 to change (disconnect or closed), in this process, above-mentioned first control signal is to continue always, behind the output second control signal certain hour (second time), finishes the output of above-mentioned first control signal, above-mentioned switching branches 25 is disconnected, make the relay contact branch road get back to original state.
In the present embodiment, the very first time is 0.5 second, and after first control signal is output 0.5 second, thinks that the state of relay contact branch road is changed, therefore exports second control signal.Because in the present embodiment, the duration of first signal was total up to about 1 second, therefore, its second time is roughly also about 0.5 second.In other embodiments, the above-mentioned very first time also can be a value between 0.1 second to 0.5 second.
Fig. 3 is the electrical schematic diagram of circuit among first embodiment, and in Fig. 3, above-mentioned control device 21 is MCU, and the switch on the above-mentioned switching branches 25 is a controllable silicon SCR 1, and relay coil driving branch road 22 is transistor T R1, TR3 and peripheral circuit thereof; Switch drive branch road 23 is transistor T R2, TR4 and peripheral circuit thereof.
In first embodiment of the invention, also relate to a kind of device, this device can be to have comprised the electrical equipment that uses relay control, for example, the kitchen small household appliances, refrigerator, the washing machine that use.The electronic equipment of TV and other family expenses or non-family expenses.Wherein, the circuit described in the control relay circuit of this device employing present embodiment.
In the second embodiment of the present invention, its method flow diagram and first embodiment are roughly the same, do not repeat them here.
Second embodiment of the invention also relates to a kind of circuit, and Fig. 4 shows the block diagram of circuit in the present embodiment, and Fig. 5 is the electrical schematic diagram of circuit among second embodiment.Compare with first embodiment, switching branches 25 is serially connected in the above-mentioned relay contact branch road among second embodiment, switch in this switching branches 25 is in relay work conducting always constantly, when the state of above-mentioned relay contact 242 will change, need stop to export first control signal, make the switch in the above-mentioned switching branches 25 disconnect, be that relay contact is broken by its branch road, after the state change of relay contact is finished, export first control signal once more, make that the switch in the switching branches 25 is closed once more, the state before getting back to; And in first embodiment, because switching branches 25 is attempted by on the relay contact, so its first control signal do not export at ordinary times, and its switch is in off-state; Output first control signal before needs change the relay contact state, closed above-mentioned switch.
Except that some trickleer differences that above-mentioned difference and this difference thereof are brought, the first embodiment of the invention and first embodiment are basic identical.
In second embodiment of the invention, also relate to a kind of device, this device can be to have comprised the electrical equipment that uses relay control, for example, the kitchen small household appliances, refrigerator, the washing machine that use.The electronic equipment of TV and other family expenses or non-family expenses.Wherein, the circuit described in the control relay circuit of this device employing present embodiment.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. one kind is improved the relay method in useful life, it is characterized in that, comprises the steps:
A) change the state of described relay contact place branch road, to make it go up electric current be zero or approach zero;
B) make described appliance contact move;
C) state on the road of the described relay contact of recovery.
2. the method in raising relay according to claim 1 useful life is characterized in that described steps A) in change described relay contacts place and prop up line state and comprise it being that this branch road is disconnected or by bypass.
3. the method in raising relay according to claim 1 useful life, it is characterized in that, described steps A) line state first control signal that changes and second control signal of controlling described relay contact action are propped up in the described relay contact of control place in has same control device to produce, and the described first signal time started, the concluding time of described first control signal was later than the concluding time of second control signal in advance in the time started of second control signal.
4. the method in raising relay according to claim 3 useful life is characterized in that more described second control signal of described first control signal shifts to an earlier date very first time output, and the described very first time comprises 0.1 second to 0.5 second.
5. one kind is improved the relay circuit in useful life, comprise the relay contact branch road that is connected with load, accept defeated second control signal of control device, change described relay coil electric current and make the relay of described relay contact action drive the control device of branch road and output control signal, it is characterized in that, comprise that also the electric current that is used for the feasible described contact of flowing through of state of its place, contact branch road of change before described relay contact action is zero or approaches zero switching branches, described switching branches is controlled by described control device.
6. the circuit in raising relay according to claim 5 useful life is characterized in that, described switching branches comprises and connects with described relay contact two ends, makes described contact by the controllable silicon branch road of bypass when receiving first control signal.
7. the circuit in raising relay according to claim 6 useful life is characterized in that two switch terminals of described silicon controlled are connected on described two relay contacts, and its control end is electrically connected with first signal output part of described control device.
8. the circuit in raising relay according to claim 5 useful life is characterized in that, described switching branches comprises being serially connected in makes the controllable silicon branch road that described contact is disconnected in the described relay contact branch road, when receiving first control signal.
9. the circuit in raising relay according to claim 8 useful life, it is characterized in that, two switch terminals of described silicon controlled are connected and an end of load in the described contact respectively, and its control end is electrically connected with first signal input part of described control device.
10. a device comprises relay and drive circuit thereof, it is characterized in that, also comprises as claim 7 or 9 any described switching branches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910238981A CN101807490A (en) | 2009-12-31 | 2009-12-31 | Method and circuit for prolonging service life of relay and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910238981A CN101807490A (en) | 2009-12-31 | 2009-12-31 | Method and circuit for prolonging service life of relay and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101807490A true CN101807490A (en) | 2010-08-18 |
Family
ID=42609234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910238981A Pending CN101807490A (en) | 2009-12-31 | 2009-12-31 | Method and circuit for prolonging service life of relay and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101807490A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515150A (en) * | 2012-06-21 | 2014-01-15 | 贵州航天电器股份有限公司 | Hybrid relay |
| CN104701083A (en) * | 2013-12-10 | 2015-06-10 | 珠海格力电器股份有限公司 | relay contact control method, device and equipment |
| CN113162188A (en) * | 2021-05-07 | 2021-07-23 | 广东汇天航空航天科技有限公司 | Charging control method, device and system for electric manned aircraft |
-
2009
- 2009-12-31 CN CN200910238981A patent/CN101807490A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515150A (en) * | 2012-06-21 | 2014-01-15 | 贵州航天电器股份有限公司 | Hybrid relay |
| CN104701083A (en) * | 2013-12-10 | 2015-06-10 | 珠海格力电器股份有限公司 | relay contact control method, device and equipment |
| CN104701083B (en) * | 2013-12-10 | 2018-01-05 | 珠海格力电器股份有限公司 | relay contact control method, device and equipment |
| CN113162188A (en) * | 2021-05-07 | 2021-07-23 | 广东汇天航空航天科技有限公司 | Charging control method, device and system for electric manned aircraft |
| CN113162188B (en) * | 2021-05-07 | 2024-04-12 | 广东汇天航空航天科技有限公司 | Electric manned aircraft charging control method, device and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101478176B (en) | Backup electric power system | |
| US8820484B2 (en) | Circuits and methods for controlling elevator braking system | |
| EP3021052B1 (en) | Air conditioner | |
| CN106249631B (en) | A kind of double control switch based on single firewire switch | |
| CN104110800B (en) | The method of controlling switch of resistive load, system and air-conditioner | |
| CN105006806A (en) | Circuit breaker series connection type electrical trip prevention circuit | |
| CN101807490A (en) | Method and circuit for prolonging service life of relay and device | |
| CN107845519B (en) | Double power supply automatic transfer switch and its control method | |
| CN210608966U (en) | Double-loop double-speed electromagnetic starter | |
| CN103269057B (en) | A kind of earth-fault protection | |
| CN214480541U (en) | Bistable contactor capable of electrically switching on and off and automatically switching on | |
| CN103996567A (en) | Contactor driving circuit | |
| CN211046803U (en) | Star-delta voltage reduction starting circuit | |
| CN103594290A (en) | Control circuit for alternating current contactor | |
| CN208257499U (en) | Dual power supply automatic bus | |
| CN209982174U (en) | Parallel AC UPS | |
| WO2020119335A1 (en) | Wireless control motor start and stop system | |
| CN106601549A (en) | DC relay protection control method and circuit | |
| CN201594804U (en) | Starting circuit of asynchronous motor | |
| CN209072071U (en) | Two inlet wires of one kind and mother automatic switching control system | |
| CN203691293U (en) | Mining explosion-proof and intrinsically-safe dual-contactor low-voltage AC soft starter | |
| CN206907721U (en) | A kind of breaker electric spring operating mechanism separating brake control loop | |
| CN206771655U (en) | A kind of air-conditioning of mechanical switch control | |
| RU75104U1 (en) | POWER SUPPLY SYSTEM WITH AUTOMATIC RESERVATION | |
| CN110931311A (en) | VSP5 switch electric control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100818 |