CN203733720U - Control circuit for electromagnetic contactor - Google Patents
Control circuit for electromagnetic contactor Download PDFInfo
- Publication number
- CN203733720U CN203733720U CN201320888790.2U CN201320888790U CN203733720U CN 203733720 U CN203733720 U CN 203733720U CN 201320888790 U CN201320888790 U CN 201320888790U CN 203733720 U CN203733720 U CN 203733720U
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- circuit
- electromagnetic
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- coil driving
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- 238000002955 isolation Methods 0.000 claims description 13
- 230000005669 field effect Effects 0.000 claims description 3
- 230000001012 protector Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000001052 transient effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 230000000452 restraining effect Effects 0.000 abstract 1
- 230000008054 signal transmission Effects 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
Provided is a control circuit for an electromagnetic contactor. The control circuit is characterized by comprising a rectification circuit, a circuit board power supply circuit, a product control mode selection circuit, an opto-isolator signal transmission and conversion circuit end, a solenoid coil drive circuit, a solenoid coil, a clamping freewheeling circuit, and an electromagnetic system supply voltage quick judging circuit. Using the control circuit for an electromagnetic contactor, AC and DC supply voltage of a contactor electromagnetic system can be commonly used. A product is provided with an external low voltage signal controllable interface, thereby speeding up product actuation time, restraining reversed high voltage generated at the moment the product is disconnected. The whole circuit uses modular design, the structure is compact and small, and installation is convenient.
Description
Technical field
The utility model belongs to low-voltage electrical technical field, specifically just relates to a kind of electromagnetic contactor control circuit, has reduced the harm that contactor coil power-off moment generation high back voltage causes system, improves contactor safety in utilization.
Background technology
Contactor is a kind of for connecting at a distance, continually and the electrical equipment of disjunction AC and DC main circuit and large volume controlled circuit, its main control object is motor, also can be used as controlling the electrical loads such as electroheat equipment, electric lighting, electric welding machine and capacitor group.Contactor has higher frequency of operation, and the highest frequency of operation can reach 1200 times per hour.The life-span of contactor is very high, is generally millions of mechanical endurance to 10,000,000 times, and electric life is generally hundreds thousand of times to millions of times.In circuit and do not require that contactor has the ability of disjunction short circuit current, in the time that circuit is short-circuited, protected by the fuse or the circuit breaker that are in series with contactor.
Contactor is divided into high pressure and lv contactor by electric pressure; Be divided into AC and DC contactor by electric current kind; Be divided into electromagnetic type, fluid pressure type, pneumatic type contactor by operating mechanism; Be divided into Direct Action Type and rotary contactor by manner of execution; Be divided into one pole, the two poles of the earth, three utmost points by the quantity of main contact, can have at most the contactor of five utmost points; Do not move the position of front main contact by contactor and be divided into normally open contact or normally closed interlock contactor.
Wherein, the connecting and disconnecting of electromagnetic treadle conventionally supply with solenoid interchange by auxiliary relay or direct voltage is controlled, but the moving immediate current of the suction of electromagnetic contactor impacts larger on the one hand at present, thereby auxiliary relay contact easily produces electric arc damage, auxiliary relay causes touching shortening in useful life, reduces the reliability of product; On the other hand, use auxiliary relay can destroy the comprehensive integration degree of system, auxiliary relay, in the time of product adhesive, due to the operate time of the auxiliary relay that superposeed, causes the whole adhesive time delay of contactor product will be elongated; The 3rd aspect, the strong perception of solenoid can cause coil blackout moment to produce high back voltage system applies is worked the mischief, and reduces safety in utilization.
Utility model content
The purpose of this utility model be do not there is outer low pressure signal for existing electromagnetic treadle can control interface, cannot switch on or power-off by signal control coil, the adhesive time delay of contactor product and release delay are long, coil blackout moment produces high back voltage to the hurtful technological deficiency of system, a kind of control circuit of electromagnetic contactor is provided, Electromagnetic System of Contactor exchanges can be general with direct current supply voltage, product has outer low pressure signal controllable interface, accelerate product operate time, suppress product and disconnect the reverse high voltage that moment produces, whole circuit adopts modularized design, compact conformation is small and exquisite, be convenient to install.
Technical scheme
In order to realize above-mentioned technical purpose, the utility model designs a kind of electromagnetic contactor control circuit, it is characterized in that: it comprises rectification circuit, described rectification circuit output end is connected to wiring board power circuit input, described wiring board power circuit output end respectively with control of product mode selection circuit input, light-coupled isolation signal transmitting and converting circuit input end, electromagnetic coil driving circuit input is connected, described control of product mode selection circuit output is connected with electromagnetic coil driving circuit input, (input is connected described light-coupled isolation signal transmitting and converting circuit output end with electromagnetic coil driving circuit, described electromagnetic coil driving circuit output is connected with solenoid, clamper freewheeling circuit and solenoid are connected in parallel, the quick decision circuitry output of electromagnetic system supply power voltage is connected with electromagnetic coil driving circuit input, the quick decision circuitry input of described electromagnetic system supply power voltage is connected with rectification circuit.
Described light-coupled isolation signal transmitting and converting circuit comprises optocoupler and relay isolated component.
Described wiring board power circuit comprises resistance, voltage stabilizing didoe pressure and electric capacity.
Described electromagnetic coil driving circuit comprises the thyristor of thyristor, field effect transistor, insulated gate bipolar transistor.
Described clamper freewheeling circuit comprises device of surge protector and the fast recovery diode of transient voltage twin zener dioder, piezo-resistance.
Beneficial effect
The control circuit of a kind of electromagnetic contactor that the utility model provides, Electromagnetic System of Contactor exchanges can be general with direct current supply voltage, product has outer low pressure signal controllable interface, can switch on or power-off by signal control coil, accelerated product operate time, suppressed product and disconnect the reverse high voltage that moment produces, whole circuit adopts modularized design, compact conformation is small and exquisite, is convenient to install.
Brief description of the drawings
Accompanying drawing 1 is circuit relationships schematic layout pattern of the present utility model.
Accompanying drawing 2 is light-coupled isolation signal transmitting and converting circuit connection diagrams in the utility model.
Accompanying drawing 3 is quick decision circuitry connection diagrams of electromagnetic system supply power voltage in the utility model.
Accompanying drawing 4 is wiring board power circuit connection diagrams in the utility model.
Accompanying drawing 5 is clamper freewheeling circuit and controlled accumulator, electromagnetic coil driving circuit and control of product mode selection circuit connection diagrams in the utility model.
Wherein, 1, light-coupled isolation signal transmitting and converting circuit, 2, the quick decision circuitry of electromagnetic system supply power voltage, 3, wiring board power circuit, 4, clamper freewheeling circuit, 5, electromagnetic coil driving circuit, 6, control of product mode selection circuit.
Embodiment
Below in conjunction with specific embodiment, the utility model is described further.
Embodiment
As shown in Figure 1, a kind of electromagnetic contactor control circuit, it is characterized in that: it comprises rectification circuit A, described rectification circuit A output is connected to wiring board power circuit B input, described wiring board power circuit B output respectively with control of product mode selection circuit C input, light-coupled isolation signal transmitting and converting circuit D input, electromagnetic coil driving circuit E input is connected, described control of product mode selection circuit C output is connected with electromagnetic coil driving circuit E input, described light-coupled isolation signal transmitting and converting circuit D output is connected with electromagnetic coil driving circuit E input, described electromagnetic coil driving circuit E output is connected with solenoid F, clamper freewheeling circuit G and solenoid F are connected in parallel, the quick decision circuitry H output of electromagnetic system supply power voltage is connected with electromagnetic coil driving circuit E input, the quick decision circuitry H input of described electromagnetic system supply power voltage is connected with rectification circuit A.
Further, described light-coupled isolation signal transmitting and converting circuit D comprises optocoupler and relay isolated component.
Further, described wiring board power circuit B comprises resistance, voltage stabilizing didoe pressure and electric capacity.
Further, described electromagnetic coil driving circuit E comprises the thyristor of thyristor, field effect transistor, insulated gate bipolar transistor.
Further, described clamper freewheeling circuit G comprises device of surge protector and the fast recovery diode of transient voltage twin zener dioder, piezo-resistance.
As shown in accompanying drawing 2～5, operation principle of the present utility model is when contactor product work is in the controlled pattern of outer low pressure signal lower time, after electromagnetic system supply power voltage is connected, wiring board power circuit 3 produces wiring board working power, in the time receiving peripheral control unit and send product adhesive instruction, adhesive signal instruction goes code product to be passed to fast electromagnetic coil driving circuit 5 after by light-coupled isolation signal transmitting and converting circuit 1, and product is inhaled moving connection; In the time receiving peripheral control unit and send product and release order, release signal instruction will be released order and will be passed to electromagnetic coil driving circuit 5 by light-coupled isolation signal transmitting and converting circuit 1, electromagnetic coil driving circuit 5 disconnects, solenoid dead electricity, solenoid produces reverse potential and enters the afterflow stage by clamper freewheeling circuit 4 simultaneously, and under the effect of clamper freewheeling circuit 4, freewheel current is suppressed, time of afterflow is shortened, and the reverse high voltage that solenoid produces is simultaneously also suppressed.
When product work is under the direct control model of electromagnetic system supply power voltage: under this pattern, the controlled pattern of outside low-voltage signal will lose efficacy; The supply power voltage of electromagnetic system is only depended in product action, when electromagnetic system supply power voltage is connected, electromagnetic coil driving circuit 5 is connected solenoid and is obtained electric, product is inhaled dynamic circuit connector lock, lose when electromagnetic system supply power voltage, the thyristor triggering signal of controlling electromagnetic coil driving circuit 5 is blocked, and electromagnetic coil driving circuit 5 disconnects, solenoid dead electricity, product discharges.
The control circuit of a kind of electromagnetic contactor that the utility model provides, Electromagnetic System of Contactor exchanges can be general with direct current supply voltage, product has outer low pressure signal controllable interface, can switch on or power-off by signal control coil, accelerated product operate time, suppressed product and disconnect the reverse high voltage that moment produces, whole circuit adopts modularized design, compact conformation is small and exquisite, is convenient to install.
Claims (5)
1. an electromagnetic contactor control circuit, it is characterized in that: it comprises rectification circuit (A), described rectification circuit (A) output is connected to wiring board power circuit (B) input, described wiring board power circuit (B) output respectively with control of product mode selection circuit (C) input, light-coupled isolation signal transmitting and converting circuit (D) input, electromagnetic coil driving circuit (E) input is connected, described control of product mode selection circuit (C) output is connected with electromagnetic coil driving circuit (E) input, described light-coupled isolation signal transmitting and converting circuit (D) output is connected with electromagnetic coil driving circuit (E) input, described electromagnetic coil driving circuit (E) output is connected with solenoid (F), clamper freewheeling circuit (G) is connected in parallel with solenoid (F), the quick decision circuitry of electromagnetic system supply power voltage (H) output is connected with electromagnetic coil driving circuit (E) input, the quick decision circuitry of described electromagnetic system supply power voltage (H) input is connected with rectification circuit (A).
2. a kind of electromagnetic contactor control circuit as claimed in claim 1, is characterized in that: described light-coupled isolation signal transmitting and converting circuit (D) comprises optocoupler and relay isolated component.
3. a kind of electromagnetic contactor control circuit as claimed in claim 1, is characterized in that: described wiring board power circuit (B) comprises resistance, voltage stabilizing didoe pressure and electric capacity.
4. a kind of electromagnetic contactor control circuit as claimed in claim 1, is characterized in that: described electromagnetic coil driving circuit (E) comprises the thyristor of thyristor, field effect transistor, insulated gate bipolar transistor.
5. a kind of electromagnetic contactor control circuit as claimed in claim 1, is characterized in that: described clamper freewheeling circuit (G) comprises device of surge protector and the fast recovery diode of transient voltage twin zener dioder, piezo-resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320888790.2U CN203733720U (en) | 2013-12-30 | 2013-12-30 | Control circuit for electromagnetic contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320888790.2U CN203733720U (en) | 2013-12-30 | 2013-12-30 | Control circuit for electromagnetic contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203733720U true CN203733720U (en) | 2014-07-23 |
Family
ID=51203771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320888790.2U Expired - Fee Related CN203733720U (en) | 2013-12-30 | 2013-12-30 | Control circuit for electromagnetic contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203733720U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655111A (en) * | 2016-10-20 | 2017-05-10 | 国家电网公司 | Circuit breaker tripping and closing coil real-time measurement and control protection device and protection method |
-
2013
- 2013-12-30 CN CN201320888790.2U patent/CN203733720U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655111A (en) * | 2016-10-20 | 2017-05-10 | 国家电网公司 | Circuit breaker tripping and closing coil real-time measurement and control protection device and protection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |