CN206541773U - A kind of relay drive circuit - Google Patents
A kind of relay drive circuit Download PDFInfo
- Publication number
- CN206541773U CN206541773U CN201720204709.2U CN201720204709U CN206541773U CN 206541773 U CN206541773 U CN 206541773U CN 201720204709 U CN201720204709 U CN 201720204709U CN 206541773 U CN206541773 U CN 206541773U
- Authority
- CN
- China
- Prior art keywords
- relay
- coil
- drive circuit
- diode
- power supply
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of relay drive circuit, including power supply, relay and magnetic valve, the coil of described relay is connected by wire with power supply, the coils from parallel connection of coils of described relay has diode and electric capacity, the coil of described relay is in series with fuse, and the action of magnetic valve is controlled after described relay power adhesive.Relay drive circuit described in the utility model, by the improvement to relay coil, effectively extends the service life of relay, improves the production efficiency of equipment.
Description
Technical field
The utility model is related to field of electrical control, more particularly, to a kind of relay drive circuit.
Background technology
Relay is a kind of electrical control device, in the control circuit for being commonly used to automation, and it is actually with small
Electric current goes to control one kind " automatic switch " of high current running, play in circuit automatically adjust, safeguard protection, change-over circuit etc.
Effect.Relay, due to frequent open and close operation, causes the frequent break-make of coil of the relay of protection device in real work
Electricity, causes coil burnout, and its service life is low, the normal work of influence.
Utility model content
The utility model provides a kind of relay drive circuit, solves above-mentioned in the prior art because of frequent starting and closing
Relay operation causes the technical problem that the coil of relay easily burns.
In order to solve the above technical problems, a kind of technical scheme provided by the utility model is：A kind of relay driving electricity
Road, including power supply, relay and magnetic valve, the coil of described relay are connected by wire with power supply, described relay
Coils from parallel connection of coils have diode and electric capacity, the coil of described relay is in series with fuse, described relay power adhesive
The action of magnetic valve is controlled afterwards.
The utility model by adopting the above-described technical solution, on the coil of relay parallel diode, can release after
" induced electromotive force " of the electric apparatus coil produced by the moment of power supply is switched on and off, the induced electromotive force can form a sensing
Electric current, prevents " induced electromotive force " from being impacted to the coil of relay, can effectively extend the service life of relay.After
Inline fuse on the coil of electrical equipment, further protection coil；The series capacitance on the coil of relay, is filled using electric capacity
The characteristic of electric discharge, the voltage of the coil of relay is maintained in normal voltage range.
Above-mentioned relay drive circuit, described electric capacity is in series with resistance.When down circuitry, put aside on electric capacity
Voltage is needed to be discharged, and to avoid the release voltage on electric capacity from damaging relay coil, resistance is connected with electric capacity,
Reduce loop current, further protection coil.
Indicator lamp, described indicator lamp and relay are provided with inside above-mentioned relay drive circuit, described relay
Coils from parallel connection of coils.Wherein, indicator lamp is used for the working condition of indicating relay.
Above-mentioned relay drive circuit, described relay is AC relay.When the coil of AC relay and two
After pole pipe is in parallel, one closed-loop path of its coil and diode formation.Induced-current produced by the moment for being powered or powering off
Consumed in the loop, protect the coil of AC relay.
Above-mentioned relay drive circuit, the two poles of the earth of described diode are welded in the wiring pin of relay coil.
The positive and negative polarities of diode arbitrarily can be welded in the wiring pin of coil.
Above-mentioned relay drive circuit, described relay is DC relay.When the coil of DC relay and two
After pole pipe is in parallel, one closed-loop path of its coil and diode formation.Induced-current produced by the moment for being powered or powering off
Consumed in the loop, protect the coil of DC relay.
Above-mentioned relay drive circuit, the two poles of the earth of described diode are reversely welded on the wiring pin of relay coil
On.The positive pole of diode connects the negative pole i.e. negative pole of power supply of DC relay coil, and the negative pole of diode connects DC relay line
The positive pole of circle is the positive pole of power supply, operationally, because diode can only be conducted to negative pole from positive pole, can avoid the short of power supply
Other elements on road, and the coil and circuit of protective relay.
Beneficial effect acquired by the utility model is：In the coils from parallel connection of coils diode of relay, only permitted using diode
Perhaps the characteristic that electric current is flowed through by single direction, alleviates the coil of relay in the induction electric produced by the moment for being powered and powering off
Gesture, there is provided a leakage path, extends the service life of relay to the impact of coil.
Brief description of the drawings
Fig. 1 is the internal circuit configuration schematic diagram of the relay of the utility model relay drive circuit；Fig. 2 is this practicality
The output control circuit schematic diagram of new type of relay drive circuit.
Embodiment
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
As depicted in figs. 1 and 2, a kind of relay drive circuit, including power supply 1, relay 2 and magnetic valve 4, it is described after
The coil of electrical equipment 2 is connected by wire with power supply 1, and the coils from parallel connection of coils of described relay 2 has diode 3 and electric capacity C, described
The coil of relay 2 is in series with fuse FU, and the action of magnetic valve 4 is controlled after the described energization adhesive of relay 2.Specifically,
The coil of relay 2 belongs to inductive load, in the moment for switching on and off power supply, can produce a very high " induction electric
Gesture ", this " induced electromotive force " can damage the coil and the other elements of circuit of relay 2 itself and circuit formation is disturbed, when
Diode 3 and coils from parallel connection of coils and during with 1 backward chaining of power supply, are easy in deenergization, this is produced on the coil of relay 2
Raw induced electromotive force can have a good leakage path, to cause the induced electromotive force not influence the coil of relay 2
And other circuit elements.
It should be understood that electric capacity C has the characteristic of logical exchange resistance direct current, above-mentioned electric capacity C and the coils from parallel connection of coils of relay 2, when
Relay 2 is AC relay and when being worked in alternating current circuit, and electric capacity C can constantly carry out discharge and recharge on its two poles of the earth, general
The voltage of the coil of relay 2 is maintained in normal voltage range, and reduction overload phenomenon, the coil of protective relay 2 makes it
Service life extends.
The normally opened contact 21 of described relay 2 is connected on the coil of magnetic valve 4, to control the action of magnetic valve 4.Should
Understand, in other embodiments, the coil of magnetic valve 4 can also connect with the normally-closed contact of relay 2.
In the present embodiment, described relay 2 is AC relay.Now, the two poles of the earth of described diode 3 are welded on
In the wiring pin of the coil of relay 2.The two poles of the earth of diode 3 can be arbitrarily welded in the wiring pin of the coil of relay 2,
Using electric Lip river iron welding manner, it may be such that coil of the diode 3 firmly with relay 2 is connected.Now, it is that relay 2 is provided
Power supply 1 be AC power.
In another embodiment, described relay 2 is DC relay.Now, the two poles of the earth of described diode 3 are reverse
In the wiring pin for being welded on the coil of relay 2.It should be understood that the positive pole of diode 3 is connected on the negative of the coil of DC relay
In the wiring pin of pole, the negative pole of diode 3 is connected on the positive terminal pin of the coil of DC relay.The coil of relay 2
After parallel diode 3, diode 3 is made the best use of the situation, and continuing flowing for coil current provides approach, and residual amount of energy is in coil and two poles
More gently self is consumed in the loop that pipe 3 is constituted so that each element in relay 2 and circuit is effectively protected
Shield.Now, it is that the power supply 1 that relay 2 is provided is dc source.
Operation principle of the present utility model is to be connected the coil of relay 2 with power supply 1 by wire, and diode 3 is welded
In the coil pin of relay 2.Power supply 1 is also connected with to the common of relay 2, electricity is connected in the opened point of common
On one pin of its coil of magnet valve 4, in another phase of another pin connection power supply of the coil of magnetic valve 4.
During work, it is powered to relay 2, the coil electricity adhesive armature of relay 2 connects opened point adhesive, it is and normal
Prescribe the coil electricity action of the magnetic valve 4 of series connection.When being stopped, the power supply of relay 2 is disconnected, the coil of relay 2 breaks
Electricity, opened point resets, and disconnects the coil of magnetic valve 4 so that magnetic valve 4 is stopped.
To sum up, relay drive circuit described in the utility model, in the coils from parallel connection of coils diode 3 of relay 2, utilizes two
Level pipe 3 allows the characteristic that electric current is flowed through by single direction, alleviates the coil of relay 2 produced by the moment for being powered and powering off
Induced electromotive force to the impact of coil there is provided a leakage path, extend the service life of relay 2.Further, relay
The service life of device 2 is extended so that in the case where largely using relay 2, can effectively reduce cost, raising is set
Standby production efficiency.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The skill of the industry
Art personnel are it should be appreciated that the present invention is not limited to the above embodiments, and described in above-described embodiment and specification is explanation
The principle of the present invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these
Changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and
Its equivalent thereof.
Claims (7)
1. a kind of relay drive circuit, including power supply, relay and magnetic valve, the coil of described relay by wire with
Power supply is connected, it is characterised in that：The coils from parallel connection of coils of described relay has a diode and electric capacity, the coil string of described relay
Fuse is associated with, the action of magnetic valve is controlled after described relay power adhesive.
2. relay drive circuit according to claim 1, it is characterised in that：Described electric capacity is in series with resistance.
3. relay drive circuit according to claim 2, it is characterised in that：Provided with instruction inside described relay
Lamp, described indicator lamp is in parallel with relay coil.
4. relay drive circuit according to claim 1, it is characterised in that：Described relay is AC relay.
5. relay drive circuit according to claim 4, it is characterised in that：The two poles of the earth of described diode be welded on after
In the wiring pin of electric apparatus coil.
6. relay drive circuit according to claim 1, it is characterised in that：Described relay is DC relay.
7. relay drive circuit according to claim 6, it is characterised in that：Reversely weld at the two poles of the earth of described diode
In the wiring pin of the coil of relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720204709.2U CN206541773U (en) | 2017-03-04 | 2017-03-04 | A kind of relay drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720204709.2U CN206541773U (en) | 2017-03-04 | 2017-03-04 | A kind of relay drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206541773U true CN206541773U (en) | 2017-10-03 |
Family
ID=59940866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720204709.2U Expired - Fee Related CN206541773U (en) | 2017-03-04 | 2017-03-04 | A kind of relay drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206541773U (en) |
-
2017
- 2017-03-04 CN CN201720204709.2U patent/CN206541773U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171003 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |