CN100490043C - Permanent magnet non-arching AC contactor - Google Patents
Permanent magnet non-arching AC contactor Download PDFInfo
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- CN100490043C CN100490043C CNB2006101344276A CN200610134427A CN100490043C CN 100490043 C CN100490043 C CN 100490043C CN B2006101344276 A CNB2006101344276 A CN B2006101344276A CN 200610134427 A CN200610134427 A CN 200610134427A CN 100490043 C CN100490043 C CN 100490043C
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Abstract
This invention relates to a permanent magnet arcless AC contactor including a top cover, a thyristor and its control part, a magnet, a moving contactor, a static contactor, a primary contactor terminal, a moving bracket, a conduction rod, a gag bit, a core, a coil, a shell and a base, in which, the control part in the thyristor and the control part is composed of a control unit, a switch unit, an energy storage element and IGBT element, the control unit is connected with the thyristor, the switch element, energy storage element and the IGBT element, one end of which is connected with any phase in a three-phase voltage by a coil, the other end is connected to the other end of the voltage, both ends of the switch element and the energy storage element are connected with the coil, both ends of each contact point of the contactor are parallel to a pair of counter-parallel single-way thyristors then to be connected to the supply and the load.
Description
Technical field
The invention belongs to the low-voltage electrical apparatus field, particularly a kind of permanent magnetism Arcless AC Contactor.
Background technology
During the work of conventional AC contactor, all to produce electric arc in adhesive and the breaking course, and to lean on coil to switch on after the contactor adhesive always and keep in touch the device attracting state, exist that the coil power consumption is big, on the main contact strong shortcomings such as electric arc arranged when the noise of interchange, on-off circuit being arranged during the energising operation, so both cause a large amount of waste of energy, polluted surrounding environment, greatly reduced the electric life of contactor again.
For many years, the electrical work person has carried out the work of a large amount of various performances of improvement contactor, and such as energy-conservation aspect, the employing that has exchanges adhesive, and direct current keeps; The employing high voltage direct current adhesive that has, low-voltage direct maintenance etc., though have power saving function, coil is still in energising, nothing but the low direct current of voltage, coil still has electric current, so can't reach energy conservation object fully.
In addition, when the contactor on-off circuit produced electric arc, many researchers had adopted the method for multiple extinguish arcs, as increasing the magnetic field arc blow-out, adopting metal grating arc-extinguishing chamber etc.Figure 1 shows that existing A.C. contactor structural profile schematic diagram, it comprises arc-extinguish chamber, arc extinguishing grid pieces, moving contact, fixed contact, main contact terminal, travel(l)ing rest, conducting rod, armature, iron core, coil, shell and base.
Above-mentioned these methods all can not fundamentally be eliminated electric arc, just limit and help extinguish arcs.Visible in the market noncontacting switch though belong to no arc product, costs an arm and a leg, and owing to do not have mechanical contact, the conduction loss height, overload capacity is poor, and is bulky.
Summary of the invention
At problems of the prior art, the invention provides a kind of permanent magnetism Arcless AC Contactor.
This contactor construction as shown in Figure 2, comprise upper end cover, controllable silicon and control section, moving contact, fixed contact, the main contact terminal, travel(l)ing rest, conducting rod, armature, iron core, coil, permanent magnet, shell and base, shell 10 covers on base, on 11, form a cavity, in this cavity, iron core 8 is fixed on base 11 central authorities, 8 one-tenth matrixs of iron core, the iron core bottom has square groove, place permanent magnet 13, all be surrounded with coil 9, two column tops and the closed flux path of armature 7 formation around two columns that protrude, armature 7 is fixedlyed connected with travel(l)ing rest 6, main contact terminal 5 forms mechanical connection by conducting rod 14 and fixed contact 4, moving, two breakpoints are arranged between the fixed contact, and controllable silicon and control section 12 are installed in the upper end cover 15, form complete contactor.
Controllable silicon and control section have been replaced the arc-control device of existing contactor among the present invention, it comprises controllable silicon part and control section, control section is made up of control unit, switching device, energy-storage travelling wave tube and IGBT element again, and control unit links to each other with controllable silicon part, switching device, energy-storage travelling wave tube and IGBT element respectively; One end of IGBT element is connected to any phase in the three-phase voltage by coil, and another links to each other its other end and three-phase voltage; The two ends of switching device and energy-storage travelling wave tube all link to each other with coil; Each two ends, contact of contactor a pair of antiparallel one-way SCR respectively in parallel is connected with load with power supply respectively, as shown in Figure 4 again.
During contactor operate as normal of the present invention, at first press starting button SA1, control section is started working, because be 20ms the intrinsic pickup time of contactor, control section makes controllable silicon prior to the contacts of contactor conducting when 10ms, realizes that no arc connects; Turn-off after control section makes the IGBT element conductive 30ms that connects with contactor coil make the contactor adhesive when 10ms simultaneously, no longer including electric current in the coil passes through, this moment, the maintenance of contactor was realized by the magnetic flux that the permanent magnet that improves in the iron core of design back produces, and had so just realized that no arc is connected and economize on electricity noiselessness operation function; When pressing stop button SA2, during the contactor coil outage, be 15ms the intrinsic release time of contactor, switching device at first switches to the coil of contactor on the energy-storage travelling wave tube, utilize the energy of energy-storage travelling wave tube that the permanent magnet in the iron core is carried out reverse degaussing, make contactor begin to discharge, for providing trigger voltage, controllable silicon continues 20ms simultaneously, like this when nearly the 15ms probe of contactor is about to open, because the rapid increase of contact resistance, when the pressure drop of contact two ends is increased to the 8V left and right sides (less than giving birth to arc voltage), because triggering signal exists always, controllable silicon is by being become conducting state by the off position of contact short circuit, and this transfer process is extremely lacked (microsecond level), before contact is not opened as yet, the electric current of contact of flowing through has forwarded on the controllable silicon, contact almost is to open under no-load is cut-off situation like this, realizes that promptly non-arc breaking is disconnected, and controllable silicon ends owing to triggering signal disappears when 20ms.
The present invention utilizes silicon controlled to end the disjunction that realizes circuit, has realized the function of no arc switching thus, and the conducting of circuit is simultaneously carried by mechanical contact, has overcome noncontacting switch conduction loss height, the shortcoming of overload capacity difference.Contactor coil of the present invention in addition only has big electric current to flow through in contactor adhesive and release moment (all being no more than 30ms), guarantee the adhesive (excitatory) and release (degaussing) of contactor, after the contactor adhesive before discharging, no current in the coil, therefore, all great changes will take place to improve coil after the design and no matter be the number of turn or line footpath, saves a large amount of copper materials.That the present invention also has is simple in structure, do not change original contactor overall dimension, advantages such as technology realizes easily, noiselessness operation, and power saving rate reaches more than 90%, and, improved the electric life of contactor greatly.
Description of drawings
Fig. 1 is existing A.C. contactor structural profile schematic diagram;
Fig. 2 is a contactor construction generalized section of the present invention;
Fig. 3 is equipped with the magnetic system structural representation of permanent magnet for contactor of the present invention;
Fig. 4 is a schematic block circuit diagram of the present invention;
Fig. 5 is the circuit theory diagrams of the specific embodiment of the invention,
(a) be control section circuit theory diagrams in the embodiment,
(b) be controllable silicon partial circuit schematic diagram in the embodiment.
1---arc-extinguish chamber, 2---arc extinguishing grid pieces, 3---moving contact, 4---fixed contact, 5---main contact terminal, 6---travel(l)ing rest, 7---armature, 8---iron core, 9---coil, 10---shell, 11---base, 12---controllable silicon and control section, 13---permanent magnet, 14---conducting rod, 15---upper end cover, 16---control section among the figure.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
Figure 2 shows that present embodiment structural profile schematic diagram, it comprises upper end cover, controllable silicon and control section, moving contact, fixed contact, main contact terminal, travel(l)ing rest, conducting rod, armature, iron core, coil, permanent magnet, shell and base, wherein controllable silicon and control module have been replaced the arc extinguishing part of existing contactor, and have increased permanent magnet in the iron core bottom.Shell 10 covers on the base 11, form a cavity, in this cavity, iron core 8 is fixed on base 11 central authorities, 8 one-tenth matrixs of iron core, the iron core bottom has square groove, place permanent magnet 13, all be surrounded with coil 9, two column tops and the closed flux path of armature 7 formation around two columns that protrude, armature 7 is fixedlyed connected with travel(l)ing rest 6, main contact terminal 5 forms mechanical connection by conducting rod 14 and fixed contact 4, two breakpoints are arranged between the dynamic and static contact, and controllable silicon and control section 12 are installed in the upper end cover 15, form complete contactor.
Fig. 3 is a magnetic system structural representation in the present embodiment.
Fig. 5 (a) is depicted as present embodiment control module circuit theory diagrams, two relays among the figure, the first relay K A1 and the second relay K A2 realize handoff functionality, the circuit that the 3rd capacitor C3 and the 6th diode D6 form is realized energy-storage function, IGBT, YMDZ realizes the IGBT function, the first voltage comparator U1A, the second voltage comparator U1B and peripheral circuit thereof are realized controlled function, wherein the coil of the first relay K A1 directly links to each other with the 12V power supply, its a pair of normally opened contact links to each other with the collector electrode of 380V Voltage pulsating direct-current supply and IGBT respectively, and a pair of normally-closed contact then links to each other with contactor coil; Coil one end of the second relay K A2 links to each other with the 12V power supply, and the other end links to each other with the collector electrode of triode Q1, and first end of its first normally opened contact is by the 3rd capacitor C
3Link to each other with first end of second normally opened contact with the 6th diode D6, second end of first normally opened contact links to each other with AC power, and second end of second normally opened contact links to each other with ground; The output of the first voltage comparator UIA links to each other with the base stage of IGBT by the 8th resistance R 8, and the negative terminal in two inputs links to each other with the end of the 6th resistance R 6 with the 7th resistance R 7 respectively, the anode in two inputs respectively with the 5th resistance R
5An end, the 5th diode D
5The anode and second capacitor C
2Negative pole link to each other; The output of the second voltage comparator UIB links to each other with the base stage of triode Q1 by the 4th resistance R 4, and the output of the second voltage comparator UIB also passes through the 3rd diode D3 simultaneously and links to each other with second capacitor C 2, the anode and first resistance R in two inputs
1An end, first capacitor C
1The positive pole and the second diode D
2Anode link to each other; The base stage of IGBT is linked the output of the first voltage comparator UIA by the 8th resistance R 8, and collector electrode links to each other with the 380V Voltage pulsating direct-current supply by the 6th diode D6, and emitter links to each other with ground, a piezo-resistance YMDZ in parallel between emitter and the collector electrode; Be connected to the first diode D1 between 12V power supply and the ground, control section circuit and Fig. 5 (b) controllable silicon partial circuit link to each other by tie point (a ', b ').
Fig. 5 (b) is depicted as controllable silicon partial circuit schematic diagram in the present embodiment, adopted conventional SCR control circuit, among the figure every phase contact KM two ends all in parallel a pair of antiparallel controllable silicon SCR, when contactor coil is switched on, be about 20ms the intrinsic pickup time of contactor, circuits for triggering among the figure make three pairs of antiparallel controllable silicon conductings when 10ms, controllable silicon is connected circuit prior to the contact of contactor like this, during to the 20ms contact closure, contact is just with the controllable silicon short circuit, because the silicon controlled tube voltage drop is not enough to produce electric arc, historical facts or anecdotes has showed no arc turn-on power loss.When coil blackout, be about 15ms the intrinsic release time of this contactor, and thyristor gating circuit is because the electric current that has storage capacitor C1 to discharge makes circuits for triggering keep the triggering state before 20ms always, like this when nearly the 15ms probe of contactor is about to open, because the rapid increase of contact resistance, when the pressure drop of contact two ends is increased to the 8V left and right sides (less than giving birth to arc voltage), because triggering signal exists always, controllable silicon is by being become conducting state by the off position of contact short circuit, this transfer process is extremely lacked (microsecond level), before contact is not opened as yet, the electric current of contact of flowing through has forwarded on the controllable silicon, contact almost is to open under no-load is cut-off situation like this, and controllable silicon ends owing to triggering signal disappears when 20ms, thereby makes circuit realize that no arc cut-offs.
Claims (2)
1. permanent magnetism Arcless AC Contactor, comprise upper end cover, moving contact, fixed contact, main contact terminal, travel(l)ing rest, conducting rod, armature, iron core, coil, shell and base, it is characterized in that also comprising controllable silicon and control section, permanent magnet, iron core becomes matrix, the iron core bottom has square groove, place permanent magnet, controllable silicon and control section are installed in the upper end cover; Control section is made up of control unit, switching device, energy-storage travelling wave tube and IGBT element in controllable silicon and the control section, and control unit links to each other with controllable silicon part, switching device, energy-storage travelling wave tube and IGBT element respectively; IGBT element one end is connected to any phase in the three-phase voltage by coil, and another links to each other the other end and three-phase voltage; The two ends of switching device and energy-storage travelling wave tube all link to each other with coil; Each two ends, contact of the contactor of being made up of moving contact and fixed contact a pair of reciprocal one-way SCR respectively in parallel is connected with load with power supply respectively again.
2. according to the described a kind of permanent magnetism Arcless AC Contactor of claim 1, it is characterized in that the first relay (KA in the control section circuit
1) coil directly link to each other with DC power supply, its a pair of normally opened contact links to each other with the collector electrode of Voltage pulsating direct-current supply and IGBT respectively, and two moving contacts of a pair of normally-closed contact link to each other with two end points of contactor coil; Second relay (the KA
2) coil one end link to each other the other end and triode (Q with DC power supply
1) collector electrode link to each other, first end of its first normally opened contact is by the 3rd electric capacity (C
3) and the 6th diode (D
6) link to each other with first end of second normally opened contact, second end of first normally opened contact links to each other with AC power, and second end of second normally opened contact links to each other with ground; The output of first voltage comparator (UIA) is by the 8th resistance (R
8) link to each other negative terminal in its input and the 6th resistance (R with the base stage of IGBT
6) and the 7th resistance (R
7) an end link to each other, the anode in the input respectively with the 5th resistance (R
5) an end, the 5th diode (D
5) the anode and the second electric capacity (C
2) negative pole link to each other; The output of second voltage comparator (UIB) is by the 4th resistance (R
4) and triode (Q
1) base stage link to each other the anode in its input and the first resistance (R
1) end, the first electric capacity (C
1) the positive pole and the second diode (D
2) anode link to each other the negative terminal in the input and the second resistance (R
2) and the 3rd resistance (R
3) an end link to each other, the collector electrode of IGBT is by the 6th diode (D
6) link to each other with Voltage pulsating direct-current supply, emitter links to each other with ground, a piezo-resistance in parallel between emitter and the collector electrode; Be connected to the first diode (D between DC power supply and the ground
1), control section circuit and controllable silicon partial circuit link to each other by tie point (a ', b ').
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101344276A CN100490043C (en) | 2006-11-30 | 2006-11-30 | Permanent magnet non-arching AC contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101344276A CN100490043C (en) | 2006-11-30 | 2006-11-30 | Permanent magnet non-arching AC contactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1988095A CN1988095A (en) | 2007-06-27 |
| CN100490043C true CN100490043C (en) | 2009-05-20 |
Family
ID=38184838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101344276A Expired - Fee Related CN100490043C (en) | 2006-11-30 | 2006-11-30 | Permanent magnet non-arching AC contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100490043C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101980348A (en) * | 2010-11-24 | 2011-02-23 | 沈阳工业大学 | Alternating current contact with soft-start and non-arc make-and-break functions |
| CN102118015A (en) * | 2011-03-09 | 2011-07-06 | 何禹生 | Single-phase three-phase electricity-saving fireproofing switch |
| CN105428157A (en) * | 2015-11-20 | 2016-03-23 | 成都迅德科技有限公司 | Non-arc contactor |
| CN107134390B (en) * | 2017-07-03 | 2021-07-27 | 石家庄福润新技术股份有限公司 | Intelligent control and protection switch |
| CN116364479B (en) * | 2023-03-27 | 2023-11-10 | 嘉兴正誉电气有限公司 | Three-phase synchronous high-voltage contactor for rail transit permanent magnet motor |
-
2006
- 2006-11-30 CN CNB2006101344276A patent/CN100490043C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1988095A (en) | 2007-06-27 |
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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 | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenyang Yuanda Compressor Manufacturing Co., Ltd. Assignor: Shenyang University of Technology Contract fulfillment period: 2009.12.15 to 2014.12.15 contract change Contract record no.: 2009210000315 Denomination of invention: Permanent magnet non-arching AC contactor Granted publication date: 20090520 License type: Exclusive license Record date: 20091231 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.12.15 TO 2014.12.15; CHANGE OF CONTRACT Name of requester: SHENYANG YUANDA COMPRESSOR MANUFACTURING CO., LTD. Effective date: 20091231 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090520 Termination date: 20121130 |