CN203261305U - Novel electronic type alternating-current contactor - Google Patents
Novel electronic type alternating-current contactor Download PDFInfo
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- CN203261305U CN203261305U CN 201320267133 CN201320267133U CN203261305U CN 203261305 U CN203261305 U CN 203261305U CN 201320267133 CN201320267133 CN 201320267133 CN 201320267133 U CN201320267133 U CN 201320267133U CN 203261305 U CN203261305 U CN 203261305U
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Abstract
Provided is a novel electronic type alternating-current contactor. The novel electronic type alternating-current contactor is characterized in that: the novel electronic type alternating-current contactor comprises a solid-state switch and a protection circuit of the solid-state switch; the solid-state switch is a full-controlled solid-state switch which is formed by diodes and IGBI tubes, and each group comprises two diodes and two IGBI tubes, wherein the two diodes are in an inverse direction, each of the diodes is connected with each of the IGBI tubes in parallel, the parallel part is then serially connected with another parallel part; the group which is connected with a C phase is fixed, and controlled by a PLC control signal, the groups which are connected with A and B phases changes the phase sequence of a power supply, so the front and inverse rotation of a motor is achieved; and the protection circuit is formed by an IC555 time-base circuit, a thermistor, a regulating potentiometer, a capacitor, an electromagnetic relay, and a direct-current power supply, and by changing the resistance value of the circuit, changing the load current and voltage output, and finishing the on/off of the circuit, the protection circuit protects the motor and the IGBT tube. The novel electronic type alternating-current contactor is provided with functions of time delay, voltage reduction and current limit when the motor starts, satisfies a need of safely and stably starting the motor, is largely free of power consumption when the IGBT is in a full conducting state, is highly efficient and energy saving.
Description
Technical field
The utility model relates to electronics, electrical equipment and electrical engineering field, relates to especially a kind of electronic contactless phase-change switch of large electric current.
Background technology
Existing A.C. contactor both domestic and external nearly all is that the contact contacting type switch is arranged, the construction package of its formation is comprised of electromagnetic mechanism, contact system, arc-control device and other auxiliary body, the potential winding in the electromagnetic mechanism electric and dead electricity are the core components of its contact switching of control.Particularly in the industrial production of existing electric automatization, existing A.C. contactor seems that more disadvantage is outstanding, frequent switching causes main contacts to burn out and easily causes the loose contact fault such as large current load, especially in the production that the operation of motor both forward and reverse directions is arranged, two contactors that must be equipped with simultaneously the both forward and reverse directions operation switch back and forth, although arc-control device is arranged, but because of the complete arc control in the gap of the mechanical action frequency of contact switching, be that useful life, the reliability of operation of contact all can possess certain impact.
Existing noncontacting switch is divided into the magnetic amplifier noncontacting switch, electron tube, ion tubular type noncontacting switch and semiconductor noncontacting switch.The internal structure of various noncontacting switches is different, and switching characteristic is also different.Magnetic amplifier noncontacting switch volume and weight are large and current conversion speed is slow, less employing; Electron tube, ion tubular type noncontacting switch are limited by very large in actual applications because the power of electron tube, ionic tube can not be done very greatly; The semiconductor noncontacting switch is to borrow the controlled conduction of semiconductor device in the circuit to realize connecting and disconnecting of the circuit, has a good application prospect.Although developed thyristor as the electronic switch of loop on-off element, so far or the electronic AC contactor of neither one telotism.
The utility model content
The utility model purpose is to provide a kind of telotism, be convenient to switch, adapt to the ac circuit break-make, have the electronic non-contact A.C. contactor of overload protection, is a kind of safe and reliable, efficient energy-saving, multi-functional, contactless electronic AC contactor.
The concrete technical scheme that the utility model is taked is:
A kind of new-style electronic A.C. contactor, it is characterized in that comprising solid-state switch and protective circuit thereof, solid-state switch is every group and carries two diodes and IGBT pipe, the full-control type solid-state switch that is composed in series again behind elder generation's anti-paralleled diode and the IGBT pipe, it is public constant to connect being fixed as of C phase, meet A, being subjected to the PLC control signal of B phase and the converting power source phase sequence makes coupled motor positive and inverse; Protective circuit is comprised of IC555 time-base circuit, thermistor, regulator potentiometer, electric capacity, electromagnetic relay, DC power supply; rely on and change circuit resistance value; step ground change of load electric current and Voltage-output, the break-make of completing circuit makes coupled motor and IGBT be in control protection.
Described IGBT pipe, it is insulated gate bipolar transistor, by the BJT(double pole triode) and the MOSFET(insulating gate type field effect tube) the compound full-control type voltage driven type power semiconductor that forms, have the advantage of low conduction voltage drop two aspects of the high input impedance of MOSFET and GTR concurrently, driving power is little and saturation pressure reduces.Form raceway groove by adding the forward grid voltage, provide base current to transistor, make the conducting of IGBT pipe; Otherwise, add the reverse swing door pole tension and eliminate raceway groove, cut off base current, the IGBT pipe is turn-offed.
Described IGBT pipe, when using, adopts by high power load the discrete component combination with diode, but along with the development of modern science and technology level also can be integrated in above the same wafer, introduce a termination tech and trench gate technology, the saturation conduction pressure drop is reduced, reduce conduction loss, realize reverse conducting, for flyback voltage provides path.
Described solid-state switch, formed by five groups of anti-paralleled diodes and IGBT pipe, every group is comprised of two diodes and two IGBT pipes, it is each diode and the IGBT pipe inverse parallel place in circuit of connecting again, that is to say a diode cathode and is connected a source electrode of IGBT pipe (claiming again emitter) connection, and the negative pole of this diode be connected the drain electrode of IGBT pipe and connect, will be connected by the circuit that IGBT pipe and diodes in parallel form again, the grid of IGBT pipe is as the input of PLC control signal.
When the positive rotaring signal of PLC output motor, connect two grids of first group of IGBT pipe of A phase, two grids that connect the 3rd group of IGBT pipe of B phase, two grid access control voltages that connect the 5th group of IGBT pipe of C phase and make its transistor turns; When PLC output motor reverse signal, connect two grids of the 4th group of IGBT pipe of A phase, two grids that connect second group of IGBT pipe of B phase, two grid access control voltages that connect the 5th group of IGBT pipe of group of C phase and make its transistor turns, external motor changes direction of rotation with the switching of A, B phase.
Its guiding path is: when the positive half cycle of alternating current, electric current flows into mutually from first group of A, because the grid of prime IGBT pipe has the control signal conducting, the diode in parallel with it ends because adding reverse input voltage, and the rear class diode of series connection with it is because adding the forward voltage conducting; The prime diode adds forward voltage and conducting when the alternating current negative half period, and the rear class diode of series connection with it ends because adding reverse voltage, because the grid of rear class IGBT pipe has the control signal conducting, thereby finishes the full conducting of alternating current.The operating path of B, C phase and principle are as described.
Described IC555 time-base circuit, it is a kind of hybrid integrated circuit that analog circuit and digital circuit are combined, generally formed by two comparators, a basic rest-set flip-flop, an inverter buffer, a triode and three 5k Ω resistance, can adopt the independent power supply of 4.5～15V, also can with other operational amplifier and TTL circuit common source, accurately timing can be provided.
In the described protective circuit; thermistor is installed in the IGBT heating panel; regulator potentiometer links to each other with thermistor; a foot of IC555 time-base circuit links to each other with electromagnetic relay; the IGBT grid circuit of the normally-closed contact of electromagnetic relay access in parallel with normally opened contact main circuit; PLC output direct-flow signal voltage by external is switched on or switched off three phase mains automatically, makes IGBT and motor realize conducting or cut-off.
Its operation principle is: regulator potentiometer makes thermistor at motor overload; line current increases when causing IGBT pipe temperature superelevation; automatically a foot output control voltage that links to each other with electromagnetic relay in the control IC555 time-base circuit; make electromagnetic relay obtain voltage and move; and then the normally-closed contact of the IGBT tube grid circuit of its access control main circuit is disconnected; it is negative voltage that the normally opened contact closure makes the PLC direct-current control voltage that adds the IGBT grid; the IGBT pipe of all working becomes cut-off from conducting rapidly; thereby cut off the three phase mains that enters motor, IGBT module and motor all are protected.When pending fault recovered, outside PLC had direct-flow signal voltage output, can automatically connect three phase mains again, made IGBT module and motor drop into normal operation.
Described PLC is a kind of outward element of new-style electronic A.C. contactor, utilize its output signal or manually artificial signalization, the coupled IGBT of DC power control manages the direct-flow signal voltage between grid, the source, thereby order and the element number of the IGBT pipe conducting of control main circuit and cut-off, realize the phase sequence of any two-phase power supply of conversion, satisfy motor and realize the rotating function.
The utility model adopts the IGBT pipe to substitute the mechanical contact of existing A.C. contactor, and itself and the diode inverse parallel of carrying formed the high power solid state switch jointly, also the two can be integrated in above the same wafer, realize reverse conducting, the Switching power phase sequence makes motor realize rotating work operation exactly; Adopt simultaneously the IC555 time-base circuit as protective circuit; when motor overload, IGBT pipe excess Temperature; can disconnect fast three phase mains; in time protection IGBT manages and motor; pending fault can be connected three phase mains again after recovering automatically, particularly has the effect of time-delay, step-down, current limliting when electric motor starting, meets the characteristic of safety and steady starter motor; managing the essentially no power consumption of situation of full conducting at IGBT, is a kind of energy-efficient electronic AC contactor.
This new-style electronic A.C. contactor machinery-free contact, because not having the coil voltage of A.C. contactor now, so that peripheral control circuit is simple, also basic inactivity consumption.Its superiority at aspects such as Electro Magnetic Compatibility, reliability, fail safes is that contact switch is incomparable, avoids occurring because electric current is excessive spark or puncture air in high voltage circuit, causes misoperation.The utility model has not only remedied the faults such as existing machinery formula poor contact of contacts, also has overload protection function, because of the dynamic characteristic that the IGBT pipe is opened, more is conducive to the step-down current-limited startup of motor.According to the type of external load, choose reasonable IGBT pipe and auxiliary element can be made the different electronic AC contactor of multiple power.
In addition, the beneficial effects of the utility model also comprise: (1) life-span is long, the starting the arc during mechanical contact-type disjunction, contact abrasion, and this new-style electronic A.C. contactor is wearing and tearing not, do not occur electric arc or spark during turn-on and turn-off.(2) be swift in motion, operating frequency is high, and mechanical contact-type is 4 ~ 10 power frequency cycles, this new-style electronic A.C. contactor＜10ms.(3) reliability is high.(4) use safety, be fit to fire prevention, the particular surroundings such as explosion-proof, moistureproof is used.(5) electromagnetic interference is little.
Description of drawings
The a part of accompanying drawing that consists of the application is used to provide further understanding of the present utility model, and itself and embodiment do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 main circuit diagram of the present utility model.
Fig. 2 protective circuit figure of the present utility model.
Label declaration: 1, motor; 2, PLC; 3, IGBT pipe; 4, diode; 5, drain D; 6, source S; 7, regulator potentiometer; 8, IC555 time-base circuit; 9, thermistor; 10, electric capacity; 11, electromagnetic relay; 12, normally-closed contact; 13, normally opened contact;
31, grid G 1; 32, grid G 2; 33, grid G 3; 34, grid G 4; 35, grid G 5; 36, grid G 6; 37, grid G 7; 38, grid G 8; 39, grid G 9; 310, grid G 10;
1 ', 2 ', 3 ', 4 ', 5 ', 6 ', 7 ', 8 ' is each port of IC555 time-base circuit.
Embodiment
For achieving the above object, the IGBT type solid-state switch control technology that solution of the present utility model has been to provide a kind of novel electric equipment to switch, its main circuit forms as shown in Figure 1:
A kind of new-style electronic A.C. contactor, it is characterized in that comprising solid-state switch and protective circuit thereof, be every group of lift-launch two diodes (4) and IGBT pipe (3), the full-control type solid-state switch that is composed in series again behind elder generation's anti-paralleled diode (4) and the IGBT pipe (3), it is in three-phase circuit, it is public constant to connect being fixed as of C phase, meets the PLC(2 that is subjected to of A, B phase) control signal and converting power source phase sequence, realize the rotating of motor; Protective circuit is comprised of IC555 time-base circuit (8), thermistor (9), regulator potentiometer (7), electric capacity (10), electromagnetic relay (11), DC power supply; rely on and change circuit resistance value; step ground change of load electric current and Voltage-output; the break-make of completing circuit, thereby protection motor (1) and IGBT pipe.
Described solid-state switch, formed by five groups of anti-paralleled diodes (4) and IGBT pipe (3), managing (3) by two diodes (4) and two IGBT for every group forms, it is each diode (4) and IGBT pipe (3) inverse parallel place in circuit of connecting again, that is to say that a diode (4) is anodal and is connected a source electrode (6) connection of an IGBT pipe (3), and the negative pole of this diode (4) be connected the drain electrode (5) of IGBT pipe (3) and connect, to be managed by IGBT the circuit series connection that (3) and diode (4) compose in parallel, the grid of IGBT pipe (3) is as PLC(2 again) input of control signal.
The course of work that IGBT type solid-state switch control electric equipment switches is: as PLC(2) during the positive rotaring signal of output motor (1), the grid G 1(31 of first group of IGBT pipe of A phase), grid G 2(32), B is the grid G 5(35 of the 3rd group of IGBT pipe mutually), grid G 6(36), C is the grid G 9(39 of the 5th group of IGBT pipe mutually), grid G 10(310) access control voltage makes its transistor turns; Its guiding path is: when the positive half cycle of alternating current, electric current flows into mutually from first group of A, grid G 1(31 because of prime IGBT pipe (3)) the control signal conducting is arranged, the diode in parallel with it (4) ends because adding reverse input voltage, and the rear class diode (4) of series connection with it is because adding the forward voltage conducting; Prime diode (4) adds forward voltage and conducting and the rear class diode (4) of series connection with it ends because adding reverse voltage when the alternating current negative half period, grid G 2(32 because of IGBT pipe (3)) the control signal conducting is arranged, thereby finish the full conducting of alternating current.The operating path principle of B, C phase is as described.As PLC(2) during output motor (1) reverse signal, the grid G 7(37 of the 4th group of IGBT pipe of A phase), grid G 8(38), the grid G 3(33 of second group of IGBT pipe of B phase), grid G 4(34), the grid G 9(39 of the 5th group of IGBT pipe of C phase), grid G 10(310) access control voltage makes its transistor turns, its operation principle such as same as above.External motor (1) changes direction of rotation with the switching of A, B phase.
The IGBT pipe is a kind of voltage-type control device that is composited by MOSFET and bipolar transistor, it grid G and source S (6) between add that tens volts direct voltage makes its drain D (5) and source S (6) conducting, between grid G and source S (6), only have the leakage current of microampere order to pass through, basically consumed power not.Dynamic characteristic according to IGBT pipe (3) work, IGBT pipe (3) is in opening process, most of the time moves as MOSFET, because the access of external load is so that the voltage drop between the drain-source, the later stage that descends so that transistor enters the saturation region by the amplification region, increased delay time, more met the characteristic that motor (1) starts, character with soft start, because IGBT manages the time that open (3), the pressure drop that produces more is conducive to motor (1) safety and steady and starts, after motor (1) started operation fully, IGBT pipe (3) then entered fully conducting state.
The IGBT pipe (3) that the utility model adopts can also be integrated in above the same wafer with the diode (4) that carries, introduce a termination tech and trench gate technology, the saturation conduction pressure drop is reduced, reduce conduction loss, realize reverse conducting, for flyback voltage provides path.
For ensureing the special protective circuit that arranges of IGBT safe operation as shown in Figure 2:
This circuit is comprised of IC555 time-base circuit (8), thermistor (9), regulator potentiometer (7), electric capacity (10), electromagnetic relay (11), DC power supply.Thermistor (9) is installed in the IGBT heating panel; regulator potentiometer (7) makes thermistor (9) transship at motor (1); line current increases makes IC555 time-base circuit (8) 23 foots output control voltage when causing IGBT pipe (3) temperature superelevation; make electromagnetic relay (11) obtain voltage and move; and then the normally-closed contact (12) of its access control IGBT grid G circuit is disconnected; normally opened contact (13) closure makes the PLC(2 that adds the IGBT grid G) direct-current control voltage is negative voltage; the IGBT pipe (3) of all working becomes cut-off from conducting rapidly; thereby cut off the three phase mains that enters motor (1), IGBT pipe (3) and motor (1) all are protected.
External control of the present utility model is the PLC(2 that adopts automatic programming) export voltage swing and polarity that direct-flow signal voltage is controlled IGBT grid and source electrode, under the condition that does not possess automated procedures, also can adopt manual manual type control.
In the protective circuit of Fig. 2, PLC(2) export to the dc control signal voltage that five groups of IGBT of Fig. 1 main circuit manage (3) grid, as PLC(2) when exporting normal standard signal voltage, the forward conduction control voltage of five groups of IGBT pipes of Fig. 1 main circuit (3) grid, source electrode is normally-closed contact (12) access by the electromagnetic relay (11) of Fig. 2 protective circuit; When breaking down; because of the electromagnetic relay in the protective circuit (11) action; normally-closed contact (12) disconnects, normally opened contact (13) is connected; just with the PLC(2 among Fig. 2) grid of control voltage transformation pole reversal access Fig. 1 five groups of IGBT pipes of main circuit (3); make grid and source electrode (6) add direct reverse voltage and make IGBT manage (3) and end, play the effect of protection external circuit load and self IGBT pipe (3).
In the utility model, PLC(2) supply with all IGBT grid G power supplys, the grid of all IGBT pipes (3) all is that parallel connection is powered simultaneously.Except above-described embodiment, the utility model also has other forms of variation, do not breaking away from design spirit of the present utility model, various distortion, improvement, retouching that those of ordinary skills make the utility model scheme all fall into the scope that the utility model claims are determined.
Claims (7)
1. new-style electronic A.C. contactor, it is characterized in that comprising solid-state switch and protective circuit thereof, solid-state switch is every group and carries two diodes and IGBT pipe, the full-control type solid-state switch that is composed in series again behind elder generation's anti-paralleled diode and the IGBT pipe, it is public constant to connect being fixed as of C phase, meet A, being subjected to the PLC control signal of B phase and the converting power source phase sequence makes coupled motor positive and inverse; Protective circuit is comprised of IC555 time-base circuit, thermistor, regulator potentiometer, electric capacity, electromagnetic relay, DC power supply; rely on and change circuit resistance value; step ground change of load electric current and Voltage-output, the break-make of completing circuit makes coupled motor and IGBT be in control protection.
2. a kind of new-style electronic A.C. contactor according to claim 1, it is characterized in that described solid-state switch, formed by five groups of anti-paralleled diodes and IGBT pipe, diode cathode with is connected an IGBT pipe source electrode and connects, and this diode cathode be connected IGBT pipe drain electrode and connect, to be connected by the circuit that IGBT pipe and diodes in parallel form, the grid of IGBT pipe is as the input of PLC control signal again.
3. a kind of new-style electronic A.C. contactor according to claim 1 is characterized in that described IGBT pipe is comprised of BJT and MOSFET, forms raceway groove by adding the forward grid voltage, provides base current to transistor, makes the conducting of IGBT pipe; Eliminate raceway groove by adding the reverse swing door pole tension, cut off base current, the IGBT pipe is turn-offed.
4. a kind of new-style electronic A.C. contactor according to claim 1 is characterized in that described IGBT pipe and the diode that carries adopt the discrete component combination, or is integrated in above the same wafer, realizes reverse conducting.
5. a kind of new-style electronic A.C. contactor according to claim 1, it is characterized in that external PLC, utilize its output signal or manually artificial signalization, the coupled IGBT of DC power control manages the direct-flow signal voltage between grid, the source, thereby order and the element number of the IGBT pipe conducting of control main circuit and cut-off, the phase sequence of any two-phase power supply of realization conversion.
6. a kind of new-style electronic A.C. contactor according to claim 1, it is characterized in that described IC555 time-base circuit, formed by two comparators, a basic rest-set flip-flop, an inverter buffer, a triode and three resistance, analog circuit and digital circuit are integrated.
7. the protective circuit of a new-style electronic A.C. contactor claimed in claim 1; it is characterized in that thermistor is installed in the IGBT heating panel; regulator potentiometer links to each other with thermistor; a foot of IC555 time-base circuit links to each other with electromagnetic relay; the IGBT grid circuit of the normally-closed contact of electromagnetic relay access in parallel with normally opened contact main circuit; PLC output direct-flow signal voltage by external is switched on or switched off three phase mains automatically, makes IGBT and motor realize conducting or cut-off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320267133 CN203261305U (en) | 2013-05-16 | 2013-05-16 | Novel electronic type alternating-current contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320267133 CN203261305U (en) | 2013-05-16 | 2013-05-16 | Novel electronic type alternating-current contactor |
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| Publication Number | Publication Date |
|---|---|
| CN203261305U true CN203261305U (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320267133 Expired - Fee Related CN203261305U (en) | 2013-05-16 | 2013-05-16 | Novel electronic type alternating-current contactor |
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| CN (1) | CN203261305U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248349A (en) * | 2013-05-16 | 2013-08-14 | 湖南长重机器股份有限公司 | Novel electronic alternating-current contactor |
| CN111431165A (en) * | 2020-05-19 | 2020-07-17 | 浙江巨磁智能技术有限公司 | SiC safety component and protection method thereof |
| CN113659969A (en) * | 2014-06-27 | 2021-11-16 | 西门子公司 | Motor system and IGBT switching circuit thereof |
-
2013
- 2013-05-16 CN CN 201320267133 patent/CN203261305U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248349A (en) * | 2013-05-16 | 2013-08-14 | 湖南长重机器股份有限公司 | Novel electronic alternating-current contactor |
| CN113659969A (en) * | 2014-06-27 | 2021-11-16 | 西门子公司 | Motor system and IGBT switching circuit thereof |
| CN111431165A (en) * | 2020-05-19 | 2020-07-17 | 浙江巨磁智能技术有限公司 | SiC safety component and protection method thereof |
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| Date | Code | Title | Description |
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| 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: 20131030 |
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| CF01 | Termination of patent right due to non-payment of annual fee |