CN103248349A - Novel electronic alternating-current contactor - Google Patents
Novel electronic alternating-current contactor Download PDFInfo
- Publication number
- CN103248349A CN103248349A CN2013101811377A CN201310181137A CN103248349A CN 103248349 A CN103248349 A CN 103248349A CN 2013101811377 A CN2013101811377 A CN 2013101811377A CN 201310181137 A CN201310181137 A CN 201310181137A CN 103248349 A CN103248349 A CN 103248349A
- Authority
- CN
- China
- Prior art keywords
- igbt pipe
- igbt
- circuit
- connect
- phase
- 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.)
- Granted
Links
Images
Landscapes
- Inverter Devices (AREA)
- Electronic Switches (AREA)
Abstract
The invention relates a novel electronic alternating-current contactor, which is characterized in that the novel electronic alternating-current contactor comprises a solid-state switch and a protection circuit thereof. The solid-state switch is a full-control solid switch which is formed by a plurality of groups of diodes and IGBTs (Insulated Gate Bipolar Translators), wherein each group carries two diodes and two IGBTs and the diodes and the IGBTs are firstly and inversely connected in parallel and then are serially connected. The IGBTs which are connected with a phase C are fixedly to be commonly unchanged and the IGBTs which are connected with a phase A and a phase B change power supply phase sequence under the control of PLC (Programmable Logic Controller) control signals to realize the forward and reverse rotation of a motor. The protection circuit is formed by an IC555 time-base circuit, a thermistor, a regulator potentiometer, a capacitor, an electromagnetic relay and a direct-current power supply. By changing the impedance value of the circuit, load current and voltage output are changed in steps to complete the break and the make of the circuit, so as to protect the motor and the IGBTs. The novel electronic alternating-current contactor has effects of delaying time, reducing voltage and limiting current, complies with the characteristics of safely and stably starting up the motor, basically does not consume power under the condition that the IGBTs are fully conducted, and is high-efficiency and energy-saving.
Description
Technical field
The present invention relates to electronics, electrical equipment and electrical engineering field, relate to a kind of contactless phase-change switch of electronics of big electric current especially.
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 made up 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 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 the both forward and reverse directions operation simultaneously switch back and forth, though arc-control device is arranged, but because of the gap of the mechanical action frequency of contact switching arc control fully, be that useful life, the reliability of operation of contact all can possess certain influence.
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 difference of various noncontacting switches, switching characteristic is also different.Magnetic amplifier noncontacting switch volume and weight are big and current conversion speed is slow, less employing; Electron tube, ion tubular type noncontacting switch have been subjected to very big restriction 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, still be the electronic type A.C. contactor of neither one telotism so far.
Summary of the invention
The object of the invention is to provide a kind of telotism, be convenient to switch, adapt to the ac circuit break-make, have the contactless A.C. contactor of electronic type of overload protection, is a kind of safe and reliable, efficient energy-saving, multi-functional, contactless electronic type A.C. contactor.
The concrete technical scheme that the present invention takes 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 inverse parallel diode and the IGBT pipe, it is in three-phase circuit, it is public constant to connect being fixed as of C phase, and what connect A, B phase is subjected to the PLC control signal and the converting power source phase sequence, realizes the rotating of motor; Protective circuit is made up of IC555 time-base circuit, thermistor, regulator potentiometer, electric capacity, electromagnetic relay, DC power supply; rely on and change circuit resistance value; the break-make of circuit is finished in step ground change of load electric current and voltage output, thereby protects motor and IGBT pipe.
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 formed, 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 inverse parallel diodes and IGBT pipe, formed by two diodes and two IGBT pipe for every group, it is each diode and the IGBT pipe inverse parallel place in circuit of connecting again, the source electrode (claiming emitter again) that is to say a diode cathode and an IGBT pipe is connected, and the drain electrode of the negative pole of this diode and another IGBT pipe is connected, and will be connected by the circuit that IGBT pipe and diode compose in parallel again, and the grid of IGBT pipe is as the input of PLC control signal.
When the positive rotaring signal of PLC output motor, connect first group of IGBT pipe of A phase two grids, two grids that connect the 3rd group of IGBT pipe of B phase, two grids connecing the 5th group of IGBT pipe of C phase add the control voltages makes its transistor turns; When PLC output motor reverse signal, connect the 4th group of IGBT pipe of A phase two grids, two grids that connect second group of IGBT pipe of B phase, two grids connecing the 5th group of IGBT pipe of group of C phase add the control voltages makes 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, end because adding reverse input voltage with its diode connected in parallel, the back level 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 back level diode of series connection with it ends because of adding reverse voltage, because the grid of back grade 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, timing accurately can be provided.
In the described protective circuit; thermistor is installed in the IGBT heating panel; 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 of all working manages to become from conducting rapidly and ends; 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 connect three phase mains automatically again, made IGBT module and motor drop into operate as normal.
Described PLC also can substitute with direct-flow signal voltage manually manually is set for the Programmable Logic Controller of output dc control signal.Utilize the PLC output signal, the direct-flow signal voltage between DC power supply control IGBT pipe grid, the source, thus control IGBT manages conducting and order and the element number of ending, and realizes the phase sequence of any two-phase power supply of conversion, satisfies motor and realizes the rotating function.
The present invention 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 the IC555 time-base circuit as protective circuit simultaneously; at motor overload, when IGBT pipe temperature is too high; can disconnect three phase mains fast; 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 type A.C. contactor.
This new-style electronic A.C. contactor does not have mechanical contact, because not having the coil voltage of A.C. contactor now, makes that peripheral control circuit is simple, basic inactivity consumption yet.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 present invention has not only remedied 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 type A.C. contactor of multiple power.
In addition, beneficial effect of the present invention also comprises: (1) life-span is long, the starting the arc during mechanical contact-type disjunction, contact wearing and tearing, 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 height, mechanical contact-type are 4 ~ 10 power frequency cycles, this new-style electronic A.C. contactor＜10ms.(3) reliability height.(4) use safety, be fit to particular surroundingss such as fire prevention, explosion-proof, protection against the tide and use.(5) electromagnetic interference is little.
Description of drawings
The a part of accompanying drawing that constitutes the application is used to provide further understanding of the present invention, and itself and embodiment do not constitute improper restriction of the present invention.In the accompanying drawings:
Fig. 1 main circuit diagram of the present invention.
Fig. 2 protective circuit figure of the present invention.
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 invention has been to provide a kind of novel electric equipment to switch, its main circuit is formed 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 inverse parallel 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 made up 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; finish the break-make of circuit, thus protection motor (1) and IGBT pipe.
Described solid-state switch, formed by five groups of inverse parallel 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 the anodal source electrode (6) with an IGBT pipe (3) of a diode (4) is connected, and the drain electrode (5) of the negative pole of this diode (4) and another IGBT pipe (3) is connected, to be managed the circuit series connection that (3) and diode (4) compose in parallel again by IGBT, the grid of IGBT pipe (3) is as PLC(2) 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) add control voltage and make 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, end because adding reverse input voltage with its diode connected in parallel (4), the back level diode (4) of series connection with it is because adding the forward voltage conducting; Prime diode (4) adds forward voltage and the back level diode (4) of conducting and 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) adding 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), have only 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 makes the voltage between the drain-source descend, later stage makes transistor enter the saturation region by the amplification region descending, increased delay time, met the characteristic that motor (1) starts more, 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 treating that motor (1) starts operation fully, IGBT pipe (3) then enters fully conducting state.
The IGBT pipe (3) that the present invention 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 made up 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 of all working pipe (3) becomes from conducting rapidly and ends; 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 invention 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) during the normal standard signal voltage of output, the forward conduction control voltage of five groups of IGBT pipes of Fig. 1 main circuit (3) grid, source electrode is that the normally-closed contact (12) by the electromagnetic relay (11) of Fig. 2 protective circuit inserts; 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) the control voltage transformation pole reversal inserts the grid of five groups of IGBT pipes of Fig. 1 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).
Among the present invention, 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 present invention also has other forms of variation, is not breaking away from design spirit of the present invention, and those of ordinary skills all fall into the scope that claims of the present invention are determined to various distortion, improvement, retouching that the present invention program makes.
Claims (10)
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 inverse parallel diode and the IGBT pipe, it is public constant to connect being fixed as of C phase, what connect A, B phase is subjected to the PLC control signal and the converting power source phase sequence, realizes the rotating of motor; Protective circuit is made up of IC555 time-base circuit, thermistor, regulator potentiometer, electric capacity, electromagnetic relay, DC power supply; rely on and change circuit resistance value; the break-make of circuit is finished in step ground change of load electric current and voltage output, thereby protects motor and IGBT pipe.
2. a kind of new-style electronic A.C. contactor according to claim 1, it is characterized in that when the positive rotaring signal of PLC output motor, connect A mutually two grids in first group the IGBT pipe, connect B mutually two grids in the 3rd group the IGBT pipe, connect C mutually two grids in the 5th group the IGBT pipe add the control voltages and make its transistor turns; When PLC output motor reverse signal, connect A mutually two grids in the 4th group the IGBT pipe, connect B mutually two grids in second group the IGBT pipe, connect C mutually two grids in the 5th group the IGBT pipe add the control voltages and make its transistor turns, external motor changes direction of rotation with the switching of A, B phase.
3. 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 inverse parallel diodes and IGBT pipe, a diode cathode is connected with an IGBT pipe source electrode, and this diode cathode is connected with another IGBT pipe drain electrode, to be connected by the circuit that IGBT pipe and diode compose in parallel, the grid of IGBT pipe is as the input of PLC control signal again.
4. a kind of new-style electronic A.C. contactor according to claim 1 is characterized in that described IGBT pipe is made up 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.
5. 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.
6. a kind of new-style electronic A.C. contactor according to claim 1, it is characterized in that in the described protective circuit, thermistor is installed in the IGBT heating panel, regulator potentiometer can make a foot output control voltage that links to each other with electromagnetic relay in the IC555 time-base circuit, electromagnetic relay is got, and then the normally-closed contact of its access control main circuit IGBT grid 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, and the IGBT of work becomes from conducting and ends; When pending fault recovered, PLC had direct-flow signal voltage output, can connect three phase mains automatically again, made IGBT and motor drop into operate as normal.
7. a kind of new-style electronic A.C. contactor according to claim 6, it is characterized in that utilizing PLC output signal or manually artificial signalization, direct-flow signal voltage between DC power supply control IGBT pipe grid, the source, thereby the conducting of control main circuit IGBT pipe and order and the element number of ending, the phase sequence of any two-phase power supply of realization conversion.
8. a kind of new-style electronic A.C. contactor according to claim 6, 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.
9. the electric equipment switching controls technology of the described new-style electronic A.C. contactor of claim 1, it is characterized in that when the positive rotaring signal of PLC output motor, connect A mutually two grids in first group the IGBT pipe, connect B mutually the 3rd group the IGBT pipe two grids, connect C mutually two grids in the 5th group the IGBT pipe add the control voltages and make its transistor turns; When PLC output motor reverse signal, connect A mutually two grids in the 4th group the IGBT pipe, connect B mutually two grids in second group the IGBT pipe, connect C mutually two grids in the 5th group the IGBT pipe add the control voltages and make its transistor turns, external motor changes direction of rotation with the switching of A, B phase.
10. the protective circuit of the described new-style electronic A.C. contactor of claim 1, it is characterized in that thermistor is installed in the IGBT heating panel, voltage is controlled in the foot output that regulator potentiometer can make thermistor control automatically and link to each other with electromagnetic relay in the IC555 time-base circuit, electromagnetic relay is got, and then the normally-closed contact of its access control main circuit IGBT grid 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, and the IGBT of work becomes from conducting and ends; When pending fault recovered, PLC had direct-flow signal voltage output, can connect three phase mains automatically again, made IGBT and motor drop into operate as normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310181137.7A CN103248349B (en) | 2013-05-16 | 2013-05-16 | Electronic AC contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310181137.7A CN103248349B (en) | 2013-05-16 | 2013-05-16 | Electronic AC contactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103248349A true CN103248349A (en) | 2013-08-14 |
| CN103248349B CN103248349B (en) | 2016-05-04 |
Family
ID=48927604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310181137.7A Withdrawn - After Issue CN103248349B (en) | 2013-05-16 | 2013-05-16 | Electronic AC contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103248349B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104935191A (en) * | 2014-11-27 | 2015-09-23 | 成都雷克尔科技有限公司 | Composite logic protection amplifying type mixed triggering power source for detecting power faults |
| CN110120674A (en) * | 2019-05-14 | 2019-08-13 | 云南电网有限责任公司电力科学研究院 | A kind of high-voltage AC breaker |
| CN115061054A (en) * | 2022-06-07 | 2022-09-16 | 成都四威功率电子科技有限公司 | Power battery high-power pulse discharge test equipment and method |
| CN116317480A (en) * | 2023-03-28 | 2023-06-23 | 重庆大学 | Gate drive circuit for improving overload of power device by reducing gate resistance |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2233633Y (en) * | 1995-02-09 | 1996-08-21 | 长庆石油勘探局振庆实业公司 | Overcurrent and overtemperature protector for computer control thyristor commutating arc welder |
| CN2336498Y (en) * | 1998-07-01 | 1999-09-01 | 徐立治 | Non-contact break protection AC contactor |
| CN201549395U (en) * | 2009-09-16 | 2010-08-11 | 深圳市英赛威科技有限公司 | Mechanical electronic DC switch |
| CN201570360U (en) * | 2009-12-23 | 2010-09-01 | 中国电力科学研究院 | Electronic non-contact on-load capacitance regulation tapping switch |
| CN102075140A (en) * | 2011-01-24 | 2011-05-25 | 上海海事大学 | Alternative-current/direct-current (AC/DC) dual-purpose motor control system |
| CN203261305U (en) * | 2013-05-16 | 2013-10-30 | 湖南长重机器股份有限公司 | Novel electronic type alternating-current contactor |
-
2013
- 2013-05-16 CN CN201310181137.7A patent/CN103248349B/en not_active Withdrawn - After Issue
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2233633Y (en) * | 1995-02-09 | 1996-08-21 | 长庆石油勘探局振庆实业公司 | Overcurrent and overtemperature protector for computer control thyristor commutating arc welder |
| CN2336498Y (en) * | 1998-07-01 | 1999-09-01 | 徐立治 | Non-contact break protection AC contactor |
| CN201549395U (en) * | 2009-09-16 | 2010-08-11 | 深圳市英赛威科技有限公司 | Mechanical electronic DC switch |
| CN201570360U (en) * | 2009-12-23 | 2010-09-01 | 中国电力科学研究院 | Electronic non-contact on-load capacitance regulation tapping switch |
| CN102075140A (en) * | 2011-01-24 | 2011-05-25 | 上海海事大学 | Alternative-current/direct-current (AC/DC) dual-purpose motor control system |
| CN203261305U (en) * | 2013-05-16 | 2013-10-30 | 湖南长重机器股份有限公司 | Novel electronic type alternating-current contactor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104935191A (en) * | 2014-11-27 | 2015-09-23 | 成都雷克尔科技有限公司 | Composite logic protection amplifying type mixed triggering power source for detecting power faults |
| CN110120674A (en) * | 2019-05-14 | 2019-08-13 | 云南电网有限责任公司电力科学研究院 | A kind of high-voltage AC breaker |
| CN115061054A (en) * | 2022-06-07 | 2022-09-16 | 成都四威功率电子科技有限公司 | Power battery high-power pulse discharge test equipment and method |
| CN116317480A (en) * | 2023-03-28 | 2023-06-23 | 重庆大学 | Gate drive circuit for improving overload of power device by reducing gate resistance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103248349B (en) | 2016-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101299572A (en) | Pass-by apparatus for high voltage frequency transformer | |
| CN111478642B (en) | Drive control circuit, drive control method, circuit board and air conditioner | |
| CN103248349B (en) | Electronic AC contactor | |
| EP4394835A1 (en) | Energy-saving control method for contactor | |
| CN106879147A (en) | A kind of single live wire total power touch switch circuit | |
| CN206923111U (en) | A kind of single live wire total power touch switch circuit | |
| CN203261305U (en) | Novel electronic type alternating-current contactor | |
| CN103312211A (en) | Control method of single phase grid-connected inverter | |
| CN103972871A (en) | Direct-current feeder non-arc switch with low power consumption and overcurrent and overvoltage protection function and method for implementing direct-current feeder non-arc switch | |
| CN201274459Y (en) | Driving control circuit for three-phase motor | |
| CN202949231U (en) | Intelligent zero-crossing switching silicon controlled combination switch | |
| CN104617782A (en) | Surge current resisting device, surge current resisting method and household appliance | |
| CN102158150A (en) | Ultra-low power consumption motor starter | |
| CN103929104A (en) | Drive circuit without extra drive power source | |
| CN102957157B (en) | Silicon controlled composite switch of intelligent zero-crossing switching | |
| CN103594290A (en) | Control circuit for alternating current contactor | |
| CN104600690A (en) | LED lamp and input polarity automatic converting circuit thereof | |
| CN211266446U (en) | Circuit breaker protection device | |
| CN204633663U (en) | A kind of three phase alternating current motor positive and reverse rotation control circuit | |
| CN203607335U (en) | AC contactor control circuit | |
| CN207637713U (en) | A kind of power control circuit suitable for electric locomotive contactor | |
| CN202889265U (en) | Soft starter control system driving three-phase squirrel cage asynchronous motor to operate | |
| CN206332630U (en) | A kind of switched reluctance machines and its braking circuit | |
| CN108900133A (en) | The permanent magnet synchronous motor control device and method of height driving conversion speed | |
| CN203166508U (en) | Reversed connection-preventing protective circuit for inverter power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160504 Effective date of abandoning: 20180823 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20160504 Effective date of abandoning: 20180823 |