CN201081811Y - Power-saving and lift protection device for ac contactor - Google Patents
Power-saving and lift protection device for ac contactor Download PDFInfo
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- CN201081811Y CN201081811Y CNU2007201182445U CN200720118244U CN201081811Y CN 201081811 Y CN201081811 Y CN 201081811Y CN U2007201182445 U CNU2007201182445 U CN U2007201182445U CN 200720118244 U CN200720118244 U CN 200720118244U CN 201081811 Y CN201081811 Y CN 201081811Y
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Abstract
The utility model relates to an AC contactor energy-saving service life-prolonging device, wherein an electronic device which is additionally arranged outside an AC contactor has a square plastic outer casing; the upper surface of the outer casing has two input connection terminals; both sides of the lower end of the outer casing have two output conducting wires; the internal circuit of the outer casing consists of three parts, i.e. a rectification drive circuit, a limited current circuit and a delay circuit; the connection relation of each part is as follows: one input end of the rectification drive circuit is connected with a power source, while the other input end is connected with the limited current circuit; the output end of the rectification drive circuit is connected with the coil of the AC contactor; the other end of the limited current circuit is connected with the other end of the power source; the delay circuit is connected with both ends of the power source, and the output end of the delay circuit controls a relay; moreover, the switching on/off of the limited current circuit is controlled by the contact of the relay. The device has the advantages of low price and stable and reliable performance; moreover, when arranged inside the coil loop of the AC contactor, the device obtains the effects of energy saving and less consumption, and can prolong the service life of the AC contactor.
Description
Affiliated technical field
The utility model patent relates to a kind of energy-saving, service life prolonged device of A.C. contactor, especially a kind of common A.C. contactor is carried out reducing energy consumption, reduce the heating of A.C. contactor simultaneously, prolong the A.C. contactor device in useful life, the utility model patent belongs to electricity field.
Technical background
Contactor is a kind of application automation control apparatus very widely.Contactor is mainly used in frequent connection or disjunction AC and DC circuit, A.C. contactor is a kind of in the contactor, be to adopt the operating power of AC power as contactor, common A.C. contactor is after adhesive, still leading to the alternating current operation power supply, power consumption is bigger, so common A.C. contactor heating phenomenon is very serious, not only waste electric energy, and shortened the useful life of A.C. contactor.
Consulting document learns, domestic patent about the alternating-current contactor energy-saving aspect is a lot of at present, this class patent can be divided into two big classes: the first kind adopts the structure of contactor is transformed, make contacts of contactor keep connecting by mechanical device after making the contactor adhesive, make coil blackout simultaneously, reach purpose of energy saving.Second class adopts the structure do not change contactor, and the driving power of contactor is improved, and keeps mode of adhesive or the like with little electric current again after adopting the D.C. high-current adhesive.At present, this two classes patented product all is not widely used, still use traditional common A.C. contactor in actual applications in a large number, why are these A.C. contactors with energy-saving effect widely used? reason is many-sided, but shortcomings such as price height, circuit complexity, reliability be low are arranged nothing more than, because there are above many shortcomings in the patent of these alternating-current contactor energy-savings, so these patents about alternating-current contactor energy-saving do not obtain excellent popularization and use.
Summary of the invention
The purpose of the utility model patent is to design a kind of dingus that carries out reducing energy consumption and prolong its useful life at present widely used common A.C. contactor, this device does not change the structure of A.C. contactor, only transform from the driving power of A.C. contactor, be convenient on the existing common A.C. contactor that is using, use, reduce its energy consumption and prolong its useful life, it is low that this device has price, circuit is simple, high reliability features, make real being promoted the use of on a large scale of alternating-current contactor energy-saving device energy, the electric energy of saves valuable is for setting up the contribution to society strength of economizing type.
The utility model is achieved like this:
A kind of alternating-current contactor energy-saving device for prolonging described in the utility model, it is additional outside an A.C. contactor electronic installation, do not change the structure of existing common A.C. contactor, just the output of this device winding wiring by two leads and existing A.C. contactor is linked, again the alternating current operation power supply is received on the input of this device, just can make the contactor energy-saving operation, be convenient to carry out reducing energy consumption at the contactor that is using.
A kind of alternating-current contactor energy-saving device for prolonging described in the utility model, the plastic casing that a square is arranged, the upper surface of shell has two input wires terminals, a packaged wiring board that electronic component is arranged in shell, there are two output leads the both sides, lower end of shell, these two leads are connected to the coil of A.C. contactor, and respectively there is a fixing hole both sides, lower end of shell.
The described a kind of alternating-current contactor energy-saving device for prolonging of the utility model patent, its inner circuit is by the rectification drive circuit, current-limiting circuit, delay circuit three partial circuits are formed, the annexation of each several part is such, an input of rectification drive circuit is received on the input wires terminal, another input termination current-limiting circuit, the output of rectification drive circuit connects the coil of A.C. contactor, the other end of current-limiting circuit is received the other end of input wires terminal, delay circuit is connected to the two ends of input wires terminal, relay of output control of delay circuit is controlled the input and the excision of current-limiting circuit by the contact of this relay.
The rectification drive circuit is made up of rectifier bridge heap D4 and sustained diode 5, the input one termination power L of D4, and the J1 in another termination current-limiting circuit, the output of D4 also meets D5, exports ac contactor coil then to.
Current-limiting circuit is made up of normally-closed contact J1 and R5, R6, the C4 of relay J, the D4 in the termination rectification circuit of the normally-closed contact J1 of relay J, another termination power N; The tie point of a termination J1 and N after also being parallel with the current limliting branch road that R5, R6, C4 form: C4 on the J1 and R6 is in parallel, the other end and R5 link, another termination J1 of R5 and the tie point of D4.
Delay circuit is made up of C1, R1, D1, C2, R2, D2, R3, R4, C3, D3, J, Q, a C1 and a termination AC power L after R1 is in parallel, the input of another termination D1, another input termination AC power N of D1, the output of D1 be the delay circuit power supply+and-, C2 one termination+another termination-, R2 one termination+, the other end by D2 connect-, R3 one termination+, the base stage of the other end and R4, C3, Q links, be connected to after the emitter of the other end of R4, the negative pole of C3, Q is continuous-, D3 and a termination after J is in parallel+, the collector electrode of another termination Q.
The described a kind of alternating-current contactor energy-saving device for prolonging of the utility model patent, its operation principle is such:
The input L of this device, after leading to last alternating current operation power supply between the N, electric current is along two loop flow: article one loop is through C1 step-down current limliting, after the D1 rectification, return N, provide working power to delay circuit after the D1 rectification, C2 act as filtering, make the direct current of mains ripple become voltage direct current stably, be connected between the delay circuit working power after R2 and the light-emitting diode D2 series connection, two of its effects, the one, play the effect of power supply indicator, also have the effect of voltage stabilizing when logical concurrently, when not adhesive of relay J, because the effect of R2 and D2, make that supply voltage is unlikely to rise too high and surpass the withstand voltage of capacitor C 2 and make its puncture, before power supply does not add, the last remaining electric charge of C3 can bleed off by R4, so in just the powering on of delay circuit, there is not electric charge on the C3, be equivalent to short circuit, the base stage of Q is clamped at electronegative potential, so when just having powered on, Q is in cut-off state, J because of Q by can not adhesive, the normally-closed contact J1 that be connected on the J in the current-limiting circuit this moment is closed, and after power supply added, voltage charged to C3 through R3, voltage on the C3 raises gradually, after after a while, when voltage is elevated to a certain degree, the Q conducting, J gets electric adhesive, and the normally-closed contact J1 that is connected on the J in the current-limiting circuit this moment disconnects.
Another loop AC power is returned N through D4, J1, when just powering on, because the effect of delay circuit, J1 is closed, so AC power all is added to the input of rectifier bridge heap D4, after the D4 rectification, the direct current of output ripple is given the coil of contactor, contactor under the effect of this high-voltage direct-current electricity, rapidly adhesive.Because the effect of delay circuit, after after a while, the relay J action, J1 disconnects, the current limliting branch road of being made up of R5, C4, R6 seals in rectification circuit, a less alternating current becomes a less direct current after rectification powers to ac contactor coil, and this moment, A.C. contactor was equivalent to a DC electromagnet, can continue to keep adhesive under the situation of the power supply of very little direct current.Because capacitor C 4 presents certain capacitive reactance in alternating current circuit, according to the electricity formula, so after as long as the capacity of electric capacity is determined, under the constant situation of voltage and frequency, the electric current of C4 of flowing through is just constant substantially, because the resistance of R6 is very big, the electric current of C4 of flowing through is far longer than the electric current of the R6 that flows through, electric current on the R6 can be ignored, so by 5, C4, the electric current of the current limliting branch road that R6 forms is that the capacitive reactance by C4 decides basically, and current limliting branch road and rectifier bridge heap D4 are the relations of series connection, so, the electric current of D4 of flowing through is that the capacitive reactance numerical value by C4 decides, and changes the size of C4 capacity, has also just changed the size of the electric current in the contactor coil.Theoretical and actual test all shows, A.C. contactor is after using the D.C. high-current adhesive, whether keep the continuation adhesive, with flow through in the ac contactor coil current related, when the electric current in the ac contactor coil is reduced to a certain degree, A.C. contactor will discharge, A.C. contactor is kept the numerical value of minimum current of adhesive and the relating to parameters such as inductance value of A.C. contactor, so we only need be according to the specification of A.C. contactor, determine that C4 gets a suitable capacity, make the electric current in the ac contactor coil be slightly larger than the minimum current that A.C. contactor is kept adhesive, so just can reach under the situation that makes A.C. contactor keep adhesive, the purpose of the electric current minimum in the coil, thereby realize the power consumption of the reduction A.C. contactor that the utility model patent is desired and the situation of heating, the purpose that prolongs the useful life of A.C. contactor.
The effect of R1 and R6 is after down circuitry in the circuit, remaining electric charge on C1 and the C4 is discharged, the effect of R5 is the speed that discharges and recharges of restriction C4, avoid C4 the situation of heating to occur, D3, D5 are fly-wheel diode, its effect is when the coil blackout of relay J and A.C. contactor, for the current energy that stores in the inductance provides the path of a dispensing, avoids high voltage that inductance outage back produces with other component breakdowns.
Adopt relay to keep the conversion and control element of state as big electric current attracting state of A.C. contactor and little electric current, and utilize its normally-closed contact as the input of capacitance current-limiting branch road and the switch of excision, it is core technology innovation of the present utility model, She Ji benefit has like this: relay is a kind of electric component very reliably, at present common miniature relay is all reliably adhesives in the scope of rated voltage ± 30%, still can keep adhesive after the adhesive when being low to moderate rated voltage 20%; The relay life-span is longer, and common miniature relay generally can both reach 1,000,000 times mechanical endurance at present; The relay contact capacity is bigger, at present common miniature relay opens and closes 240V alternating voltage contact capacity can reach 7～16A, the coil power dissipation of the 630A contactor of at present common maximum specification is about 1.5KVA, maximum current is no more than 10A, so miniature relay can satisfy the requirement of connection and all ac contactor coil electric currents of disjunction fully.Compare with common mode with relay, have higher reliability with semiconductor device control contactor coils such as thyristors.
Adopt resistance and capacitances in series, keep current limiting element under the state as A.C. contactor at little electric current, it is another key character of the present utility model, have many good qualities as current limiting element with electric capacity, under the constant situation of supply frequency and voltage, electric current by it is stable, electric capacity has only charging and discharge in circuit, itself is consumed energy not, and efficient is higher, and the effect of the resistance of connecting with current limiting capacitance is the electric current that limiting capacitance charges and discharge, avoid electric capacity heating situation to take place, in addition, adopt electric capacity, can improve the power factor of whole device as current limiting element.
A kind of alternating-current contactor energy-saving device for prolonging described in the utility model, circuit is simple, select reliable and stable components and parts and optimized circuit for use, evidence through sample, this device has price advantage low, stable and reliable for performance, after installing this device additional in the A.C. contactor control loop, can reach energy-conservation fully, lower consumption, prolong the A.C. contactor purpose of design in useful life.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described further.
Accompanying drawing 1 is a kind of profile of alternating-current contactor energy-saving device for prolonging.
Among the figure: 1-input wires terminal, 2-shell, 3-wiring board, 4-output lead, 5-fixing hole.
Accompanying drawing 2 is a kind of circuit diagram of alternating-current contactor energy-saving device for prolonging.
Among the figure: 1-delay circuit, 2-rectification drive circuit, 3-current-limiting circuit, 4-input wires terminal, 5-output lead.
Embodiment
In the embodiment in figure 1, a kind of alternating-current contactor energy-saving device for prolonging described in the utility model has the plastic casing (2) of a square, the upper surface of shell has two input wires terminals (1), a packaged wiring board (3) that electronic component is arranged in shell, there are two output leads (4) both sides, lower end of shell, these two leads are connected to the coil of A.C. contactor, and respectively there is a fixing hole (5) both sides, lower end of shell.
In the embodiment of Fig. 2, a kind of alternating-current contactor energy-saving device for prolonging described in the utility model, its inner circuit is made up of rectification drive circuit (2), current-limiting circuit (3), delay circuit (1) three partial circuit, the annexation of each several part is such: an input of rectification drive circuit (2) is received on the input wires terminal (4), another imports termination current-limiting circuit (3), and the output of rectification drive circuit (5) connects the coil of A.C. contactor; The other end of current-limiting circuit (3) is received the other end of input wires terminal (4), delay circuit (1) is connected to the two ends of binding post (4), relay of output control of delay circuit (1) is controlled the input and the excision of current-limiting circuit (3) by the contact of this relay.
Claims (7)
1. alternating-current contactor energy-saving device for prolonging, it is characterized in that: its inner circuit is made up of rectification drive circuit (2), current-limiting circuit (3), delay circuit (1) three partial circuit, the annexation of each several part is such: an input of rectification drive circuit (2) is received on the input wires terminal (4), another imports termination current-limiting circuit (3), and the output of rectification drive circuit (5) connects the coil of A.C. contactor; The other end of current-limiting circuit (3) is received the other end of input wires terminal (4), delay circuit (1) is connected to the two ends of input wires terminal (4), relay of output control of delay circuit (1) is controlled the input and the excision of current-limiting circuit (3) by the contact of this relay.
2. a kind of alternating-current contactor energy-saving device for prolonging according to claim 1, it is characterized in that: this device has the plastic casing (2) of a square, the upper surface of shell has two input wires terminals (1), a packaged wiring board (3) that electronic component is arranged in shell, there are two output leads (4) both sides, lower end of shell, these two leads are connected to the coil of A.C. contactor, and respectively there is a fixing hole (5) both sides, lower end of shell.
3. a kind of alternating-current contactor energy-saving device for prolonging according to claim 1, it is characterized in that: the rectification drive circuit is made up of rectifier bridge heap D4 and sustained diode 5, the input one termination power L of D4, J1 in another termination current-limiting circuit, the output of D4 also meets D5, exports ac contactor coil then to.
4. a kind of alternating-current contactor energy-saving device for prolonging according to claim 1, it is characterized in that: current-limiting circuit is made up of normally-closed contact J1 and R5, R6, the C4 of relay J, D4 in the termination rectification circuit of the normally-closed contact J1 of relay J, another termination power N; The tie point of a termination J1 and N after also being parallel with the current limliting branch road that R5, R6, C4 form: C4 on the J1 and R6 is in parallel, the other end and R5 link, another termination J1 of R5 and the tie point of D4.
5. a kind of alternating-current contactor energy-saving device for prolonging according to claim 1, it is characterized in that: delay circuit is by C1, R1, D1, C2, R2, D2, R3, R4, C3, D3, J, Q forms, a C1 and a termination AC power L after R1 is in parallel, the input of another termination D1, another input termination AC power N of D1, the output of D1 be the delay circuit power supply+and-, C2 one termination+another termination-, R2 one termination+, the other end by D2 connect-, R3 one termination+, the other end and R4, C3, the base stage of Q links, the other end of R4, the negative pole of C3, be connected to after the emitter of Q links to each other-, D3 and a termination after J is in parallel+, the collector electrode of another termination Q.
6. a kind of alternating-current contactor energy-saving device for prolonging according to claim 1, it is characterized in that: adopt relay to keep the conversion and control element of state, and utilize its normally-closed contact as the input of current limliting branch road and the switch of excision as big electric current attracting state of A.C. contactor and little electric current.
7. a kind of alternating-current contactor energy-saving device for prolonging according to claim 1, it is characterized in that: adopt resistance and capacitances in series, keep current limiting element under the state as A.C. contactor at little electric current, the capacitive reactance of electric capacity determines this branch current size, the effect of resistance is the electric current that limiting capacitance discharges and recharges, and avoids the electric capacity heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201182445U CN201081811Y (en) | 2007-01-29 | 2007-01-29 | Power-saving and lift protection device for ac contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201182445U CN201081811Y (en) | 2007-01-29 | 2007-01-29 | Power-saving and lift protection device for ac contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201081811Y true CN201081811Y (en) | 2008-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201182445U Expired - Fee Related CN201081811Y (en) | 2007-01-29 | 2007-01-29 | Power-saving and lift protection device for ac contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201081811Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107819348A (en) * | 2017-11-30 | 2018-03-20 | 惠州市蓝微新源技术有限公司 | The contactor control system and its control method of a kind of energy-accumulating power station |
-
2007
- 2007-01-29 CN CNU2007201182445U patent/CN201081811Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107819348A (en) * | 2017-11-30 | 2018-03-20 | 惠州市蓝微新源技术有限公司 | The contactor control system and its control method of a kind of energy-accumulating power station |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080702 Termination date: 20100129 |