CN104167325A - Control circuit and method for three-coil high-pressure permanent magnet operating mechanism - Google Patents
Control circuit and method for three-coil high-pressure permanent magnet operating mechanism Download PDFInfo
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- CN104167325A CN104167325A CN201410371473.2A CN201410371473A CN104167325A CN 104167325 A CN104167325 A CN 104167325A CN 201410371473 A CN201410371473 A CN 201410371473A CN 104167325 A CN104167325 A CN 104167325A
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Abstract
The invention discloses a control circuit and method for a three-coil high-pressure permanent magnet operating mechanism. The control circuit comprises a power module, a control signal module, a current monitoring module and a driving circuit, wherein the power module is used for providing working voltage for the control signal module, the current monitoring module and the driving circuit, the control signal module is used for providing driving signals for the driving circuit so as to drive corresponding switch tubes, the current monitoring module is used for monitoring magnitude of current in coils in real time and feeding information back to the control signal module so that the information can be used as reference of a driving strategy, and the driving circuit comprises a closing coil driving circuit S1, a starting-buffering coil driving circuit S2 and an opening solenoid driving circuit S3. According to the control circuit and method, the movable iron core buffering effect is achieved through follow current, harm caused by overhigh coil current to the mechanism and the control circuit is avoided, and the requirement for movable iron core buffering is met; the structure of the circuit is simplified.
Description
Technical field
The present invention relates to high-pressure vacuum breaker field, especially a kind of control circuit and control method of three-winding high voltage permanent operating mechanism.
Background technology
Operating mechanism that vacuum circuit-breaker is joined has three kinds of electromagnetic type, spring and magnetos conventionally.Wherein permanent magnet drive mechanism relies on its highly reliable, low energy consumption, non-maintaining, and can realize the plurality of advantages such as simultaneous operation, day by day causes people's concern.The requirement that high-pressure vacuum breaker is split distance is larger, and this just requires operating mechanism to have higher divide-shut brake speed.The clearance between open contacts that for example 126 kV high voltage vacuum interrupters need is in 60 mm left and right, need minute, closing speed is respectively 3.5m/s and 1.3m/s, compare with the vacuum interrupter of 12 kV medium voltage breakers, open apart from for its 6 times of left and right, minute, closing speed is its 2 times of left and right.And because moving stroke unshakable in one's determination is larger, while causing moving starting unshakable in one's determination, air-gap reluctance is very large, this just needs magnetizing coil to pass into larger exciting curent, thereby causes the series of problems such as temperature rise, control.
These problems have limited the application of permanent magnet mechanism in high-pressure vacuum breaker field.Meanwhile, due to the problem of traditional permanent magnet mechanism structure, at divide-shut brake stroke latter end, moving meeting accelerated motion unshakable in one's determination has very large impulsive force when finishing motion, when closing a floodgate, can cause contact bounce, and the reduction contact life-span.
Summary of the invention
Goal of the invention a: object is control circuit and the control method that builds a kind of three-winding high voltage permanent operating mechanism, at least part of problem existing to solve prior art.
Technical scheme: a kind of for controlling three-winding high voltage permanent operating mechanism, comprise power module, control signal module, current monitoring module and drive circuit;
Described power module is used to control signal module, current monitoring module and drive circuit that operating voltage is provided;
Described control signal module, for providing driving signal to drive circuit, drives respective switch pipe;
Described current monitoring module, for Real-Time Monitoring coil size of current, feeds back to control signal module as driving tactful reference using information;
Described drive circuit comprises closing coil drive circuit S1, startup-buffer coil drive circuit S2 and switching winding drive circuit S3;
Described closing coil drive circuit S1 comprises combined floodgate capacitor C 1, main driving switch pipe A, continued flow switch pipe B, closing coil L1, the first reverse fly-wheel diode 1 and the second reverse fly-wheel diode 2; Main driving switch pipe A and continued flow switch pipe B are connected on closing coil L1 two ends, and are connected to combined floodgate capacitor C 1 two ends, and fly-wheel diode 1 is in parallel with coil L1 and continued flow switch pipe B, and fly-wheel diode 2 is in parallel with main driving switch pipe A and coil L1.
Described startup-buffer coil drive circuit S2 comprises: combined floodgate starting switch pipe F, separating brake starting switch pipe E, startup-buffer coil L2 and the 5th fly-wheel diode 5; The 5th fly-wheel diode 5 is in parallel with startup-buffer coil L2, and is connected with the emitter of separating brake starting switch pipe E, combined floodgate starting switch pipe F.
Described switching winding drive circuit S3 comprises: the main driving switch pipe C of separating brake capacitor C 2, second, the second continued flow switch pipe D, switching winding L3, the 3rd reverse fly-wheel diode 3 and the 4th reverse fly-wheel diode 4; The second main driving switch pipe C and the second continued flow switch pipe D are connected on switching winding L3 two ends, and be connected to separating brake capacitor C 2 two ends, the 3rd reverse fly-wheel diode 3 is in parallel with switching winding L3 and the second continued flow switch pipe D, and the 4th reverse fly-wheel diode 4 is in parallel with the second main driving switch pipe C and coil L3.
Described startup-buffer coil drive circuit S2 connects with combined floodgate capacitor C 1 by separating brake starting switch pipe E, and by combined floodgate starting switch pipe, F connects with separating brake capacitor C 2.
A control method for control circuit for above-mentioned three-winding high voltage permanent operating mechanism, the method comprises: when separating brake or combined floodgate, control corresponding capacitance for startup-buffer coil L2 electric discharge;
When separating brake or combined floodgate, control respective switch pipe is closed and is realized continuous current circuit to discharge capacity reverse charging;
In separating brake or making process, the electric current on Real-Time Monitoring discharge coil, control switch pipe ON time, adjusts the coil discharge time.
Further, in scheme, when closing a floodgate, control separating brake capacitor C 2 and discharge to startup-buffer coil L2;
When separating brake, control combined floodgate capacitor C 1 and discharge to startup-buffer coil L2.
Further, in scheme, when closing a floodgate, closing coil L1 afterflow is charged to combined floodgate capacitor C 1 by the first fly-wheel diode 1 and the second fly-wheel diode 2;
When separating brake, switching winding L3 afterflow is charged to separating brake capacitor C 2 by the 3rd fly-wheel diode 3 and the 4th fly-wheel diode 4.
In further scheme, separating brake, combined floodgate, in startup-buffer coil, discharging current direction is same direction all the time, and when current value reaches certain numerical value, turn-off combined floodgate starting switch pipe F and separating brake starting switch pipe E, guaranteeing that circuital current utilizes afterflow to cushion the moving iron core of mechanism in the situation that of not excessive.
Beneficial effect: the present invention becomes two capacitance structures by circuit design, completes mechanism action in the situation that not increasing electric capacity, simplifies circuit structure; In addition, electric current in startup-buffer coil is monitored in real time, when electric current reaches set point, stopped electric discharge, rely on afterflow to realize moving cushioning effect unshakable in one's determination, avoided the excessive harm to mechanism and control circuit of coil current, meet the requirement of moving buffering unshakable in one's determination simultaneously; Finally, by afterflow control switch, realize coil discharge afterflow and oppositely discharge capacity is charged, reduced capacitor discharge pressure drop.
Accompanying drawing explanation
Fig. 1 is the structural representation of control circuit of the present invention.
Fig. 2 is the structural representation of operating mechanism of the present invention;
It is moving unshakable in one's determination that 1 guide rod, 2 permanent magnet holding mechanisms, 3 electromagnetic drive mechanisms, 4 opening-cores, 5 combined floodgate permanent magnets, 6 closing-cores, 7 separating brake permanent magnets, 8 keep moving iron core, 9 nonmagnetic substance pads, 10 closing coils, 11 startup-buffer coils, 12 switching windings, 13 to drive fixed core, 14 to drive.
Embodiment
As depicted in figs. 1 and 2, three-winding high voltage permanent operating mechanism of the present invention mainly comprises guide rod 1, and interval is arranged on guide rod and with the moving iron core 8 of maintenance and the driving of its rotation and moves iron core 14.Wherein, keep moving iron core place to be provided with combined floodgate permanent magnet 5, combined floodgate permanent magnet be fixed on to the permanent magnet holding mechanism 2 that keeps moving iron core and the combined floodgate static iron core 4 that is arranged at the inside and outside both sides of combined floodgate permanent magnet.Drive moving iron core periphery to be arranged at intervals with closing coil 10, start buffer coil 11 and switching winding 12, and drive static iron core 13 and electromagnetic drive mechanism 3; Drive a side of moving iron core to be provided with non magnetic pad 9, the separating brake static iron core 6 which is provided with separating brake permanent magnet 7, permanent magnet maintaining body 2 and be arranged at separating brake permanent magnet both sides.
Designed a kind of for controlling the circuit of above-mentioned three-winding high voltage permanent operating mechanism: comprise power module, control signal module, current monitoring module and drive circuit for this reason;
Power module is used to control signal module, current monitoring module and drive circuit that operating voltage is provided; Control signal module, for providing driving signal to drive circuit, drives respective switch pipe; Current monitoring module, for Real-Time Monitoring coil size of current, feeds back to control signal module as driving tactful reference using information; Drive circuit comprises closing coil drive circuit S1, startup-buffer coil drive circuit S2 and switching winding drive circuit S3;
As shown in Figure 1, closing coil drive circuit S1 comprises combined floodgate capacitor C 1, main driving switch pipe A, continued flow switch pipe B, closing coil L1, the first reverse fly-wheel diode 1 and the second reverse fly-wheel diode 2; Main driving switch pipe A and continued flow switch pipe B are connected on closing coil L1 two ends, and are connected to combined floodgate capacitor C 1 two ends, and fly-wheel diode 1 is in parallel with coil L1 and continued flow switch pipe B, and fly-wheel diode 2 is in parallel with main driving switch pipe A and coil L1.
Startup-buffer coil drive circuit S2 comprises: combined floodgate starting switch pipe F, separating brake starting switch pipe E, startup-buffer coil L2 and the 5th fly-wheel diode 5; The 5th fly-wheel diode 5 is in parallel with startup-buffer coil L2, and is connected with the emitter of separating brake starting switch pipe E, combined floodgate starting switch pipe F.
Switching winding drive circuit S3 comprises: the main driving switch pipe C of separating brake capacitor C 2, second, the second continued flow switch pipe D, switching winding L3, the 3rd reverse fly-wheel diode 3 and the 4th reverse fly-wheel diode 4; The second main driving switch pipe C and the second continued flow switch pipe D are connected on switching winding L3 two ends, and be connected to separating brake capacitor C 2 two ends, the 3rd reverse fly-wheel diode 3 is in parallel with switching winding L3 and the second continued flow switch pipe D, and the 4th reverse fly-wheel diode 4 is in parallel with the second main driving switch pipe C and coil L3.
Startup-buffer coil drive circuit S2 connects with combined floodgate capacitor C 1 by separating brake starting switch pipe E, and by combined floodgate starting switch pipe, F connects with separating brake capacitor C 2.
Above-mentioned three-winding high voltage permanent operating mechanism comprises the steps: by the control method of control circuit
Initial condition is that switching tube A-F is in closed condition, during combined floodgate, continued flow switch pipe B conducting, close a floodgate subsequently main driving switch pipe A and combined floodgate starting switch pipe F conducting, combined floodgate capacitor C 1 is discharged to closing coil L1 by main driving switch pipe A, continued flow switch pipe B, separating brake capacitor C 2 is discharged to startup-buffer coil L2 by switching tube F simultaneously, and mechanism starts action.
Before feed motion finishes, size of current in current monitoring module Real-Time Monitoring startup-buffer coil L2, once reach upper current limit, just turn-off combined floodgate starting switch pipe F, stop the electric discharge to startup-buffer coil L2, the electric current in startup-buffer coil L2 carries out afterflow by the 5th fly-wheel diode 5.
At mechanism action in earlier stage, the electric current in startup-buffer coil L2, to the moving assistant starting effect that plays unshakable in one's determination of mechanism, plays cushioning effect at action stage to moving iron core.
After detecting and having moved, the main driving switch pipe A that closes a floodgate closes, and combined floodgate capacitor C 1 stops closing coil electric discharge, and continued flow switch pipe B closes subsequently, electric current in closing coil is by the first fly-wheel diode 1,2 pairs of combined floodgate capacitor C 1 reverse chargings of the second continued flow switch pipe, building-out capacitor energy.
So far all switching tubes restPose.If do not need afterflow to capacitor charging, can postpone the ON time of continued flow switch pipe B, in coil, afterflow directly forms loop by the first fly-wheel diode 1 and continued flow switch pipe B.
Separating brake process is similar, is briefly described below: when separating brake, control combined floodgate capacitor C 1 and discharge to startup-buffer coil L2; Switching winding L3 afterflow is charged to separating brake capacitor C 2 by the 3rd fly-wheel diode 3 and the 4th fly-wheel diode 4;
In separating brake process, the electric current on Real-Time Monitoring discharge coil, control switch pipe ON time, adjusts the coil discharge time.Separating brake, combined floodgate, in startup-buffer coil, discharging current direction is same direction all the time, and when current value reaches certain numerical value, turn-off combined floodgate starting switch pipe F and separating brake starting switch pipe E, guaranteeing that circuital current utilizes afterflow to cushion the moving iron core of mechanism in the situation that of not excessive.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned execution mode, within the scope of technical conceive of the present invention; can carry out multiple equivalents to technical scheme of the present invention, these equivalents all belong to protection scope of the present invention.
It should be noted that in addition each the concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, between various execution mode of the present invention, also can carry out combination in any, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (9)
1. for controlling a circuit for three-winding high voltage permanent operating mechanism, it is characterized in that: comprise power module, control signal module, current monitoring module and drive circuit;
Described power module is used to control signal module, current monitoring module and drive circuit that operating voltage is provided;
Described control signal module, for providing driving signal to drive circuit, drives respective switch pipe;
Described current monitoring module, for Real-Time Monitoring coil size of current, feeds back to control signal module as driving tactful reference using information;
Described drive circuit comprises closing coil drive circuit S1, startup-buffer coil drive circuit S2 and switching winding drive circuit S3;
Described closing coil drive circuit S1 comprises combined floodgate capacitor C 1, main driving switch pipe A, continued flow switch pipe B, closing coil L1, the first reverse fly-wheel diode 1 and the second reverse fly-wheel diode 2; Main driving switch pipe A and continued flow switch pipe B are connected on closing coil L1 two ends, and are connected to combined floodgate capacitor C 1 two ends, and fly-wheel diode 1 is in parallel with coil L1 and continued flow switch pipe B, and fly-wheel diode 2 is in parallel with main driving switch pipe A and coil L1.
2. three-winding high voltage permanent operating mechanism control circuit according to claim 1, is characterized in that: described startup-buffer coil drive circuit S2 comprises: combined floodgate starting switch pipe F, separating brake starting switch pipe E, startup-buffer coil L2 and the 5th fly-wheel diode 5; The 5th fly-wheel diode 5 is in parallel with startup-buffer coil L2, and is connected with the emitter of separating brake starting switch pipe E, combined floodgate starting switch pipe F.
3. three-winding high voltage permanent operating mechanism control circuit according to claim 1, is characterized in that: described switching winding drive circuit S3 comprises: the main driving switch pipe C of separating brake capacitor C 2, second, the second continued flow switch pipe D, switching winding L3, the 3rd reverse fly-wheel diode 3 and the 4th reverse fly-wheel diode 4; The second main driving switch pipe C and the second continued flow switch pipe D are connected on switching winding L3 two ends, and be connected to separating brake capacitor C 2 two ends, the 3rd reverse fly-wheel diode 3 is in parallel with switching winding L3 and the second continued flow switch pipe D, and the 4th reverse fly-wheel diode 4 is in parallel with the second main driving switch pipe C and coil L3.
4. three-winding high voltage permanent operating mechanism control circuit according to claim 1, it is characterized in that: described startup-buffer coil drive circuit S2 connects with combined floodgate capacitor C 1 by separating brake starting switch pipe E, and by combined floodgate starting switch pipe, F connects with separating brake capacitor C 2.
5. three-winding high voltage permanent operating mechanism control circuit according to claim 1, is characterized in that: described drive circuit has two electric capacity.
6. a control method for control circuit for three-winding high voltage permanent operating mechanism claimed in claim 1, is characterized in that: the method comprises: when separating brake or combined floodgate, control corresponding capacitance for startup-buffer coil L2 electric discharge;
When separating brake or combined floodgate, control respective switch pipe is closed and is realized continuous current circuit to discharge capacity reverse charging;
In separating brake or making process, the electric current on Real-Time Monitoring discharge coil, control switch pipe ON time, adjusts the coil discharge time.
7. the control method of control circuit for a kind of three-winding high voltage permanent operating mechanism according to claim 6, is characterized in that:
When closing a floodgate, control separating brake capacitor C 2 and discharge to startup-buffer coil L2;
When separating brake, control combined floodgate capacitor C 1 and discharge to startup-buffer coil L2.
8. the control method of control circuit for a kind of three-winding high voltage permanent operating mechanism according to claim 6, is characterized in that,
When closing a floodgate, closing coil L1 afterflow is charged to combined floodgate capacitor C 1 by the first fly-wheel diode 1 and the second fly-wheel diode 2;
When separating brake, switching winding L3 afterflow is charged to separating brake capacitor C 2 by the 3rd fly-wheel diode 3 and the 4th fly-wheel diode 4.
9. according to a kind of three-winding high voltage permanent operating mechanism described in claim 6, use the control method of control circuit, it is characterized in that:
Separating brake, combined floodgate, in startup-buffer coil, discharging current direction is same direction all the time, and when current value reaches certain numerical value, turn-off combined floodgate starting switch pipe F and separating brake starting switch pipe E, guaranteeing that circuital current utilizes afterflow to cushion the moving iron core of mechanism in the situation that of not excessive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410371473.2A CN104167325B (en) | 2014-07-30 | 2014-07-30 | Control circuit and method for three-coil high-pressure permanent magnet operating mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410371473.2A CN104167325B (en) | 2014-07-30 | 2014-07-30 | Control circuit and method for three-coil high-pressure permanent magnet operating mechanism |
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| CN104167325A true CN104167325A (en) | 2014-11-26 |
| CN104167325B CN104167325B (en) | 2017-02-22 |
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| CN201410371473.2A Active CN104167325B (en) | 2014-07-30 | 2014-07-30 | Control circuit and method for three-coil high-pressure permanent magnet operating mechanism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104658823A (en) * | 2015-02-09 | 2015-05-27 | 广州供电局有限公司 | Circuit breaker equipped with permanent magnetic mechanism and speed control device and method for circuit breaker |
| CN114006401A (en) * | 2021-10-25 | 2022-02-01 | 无锡市欧瑞杰电子科技有限公司 | Double-coil permanent magnet driving circuit |
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| US20030123211A1 (en) * | 2001-12-28 | 2003-07-03 | Newton Stephen James | Electromagnetic actuator for engine valves |
| CN2678102Y (en) * | 2003-07-07 | 2005-02-09 | 浙江森源自动化成套设备有限公司 | Permanent magnetic electric control mechanism of vacuum circuit breaker |
| CN201910366U (en) * | 2010-12-06 | 2011-07-27 | 东南大学 | Fast control mechanism for extra-high voltage vacuum circuit breaker |
| CN102290279A (en) * | 2011-06-30 | 2011-12-21 | 中国人民解放军海军工程大学 | High speed vacuum direct current (DC) current limiting circuit breaker |
| CN103474287A (en) * | 2013-09-05 | 2013-12-25 | 北京交通大学 | Double-acting iron core permanent magnet operating mechanism |
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2014
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20030123211A1 (en) * | 2001-12-28 | 2003-07-03 | Newton Stephen James | Electromagnetic actuator for engine valves |
| CN2678102Y (en) * | 2003-07-07 | 2005-02-09 | 浙江森源自动化成套设备有限公司 | Permanent magnetic electric control mechanism of vacuum circuit breaker |
| CN201910366U (en) * | 2010-12-06 | 2011-07-27 | 东南大学 | Fast control mechanism for extra-high voltage vacuum circuit breaker |
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| CN103474287A (en) * | 2013-09-05 | 2013-12-25 | 北京交通大学 | Double-acting iron core permanent magnet operating mechanism |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104658823A (en) * | 2015-02-09 | 2015-05-27 | 广州供电局有限公司 | Circuit breaker equipped with permanent magnetic mechanism and speed control device and method for circuit breaker |
| CN114006401A (en) * | 2021-10-25 | 2022-02-01 | 无锡市欧瑞杰电子科技有限公司 | Double-coil permanent magnet driving circuit |
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| CN104167325B (en) | 2017-02-22 |
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Effective date of registration: 20230601 Address after: No.18, Wubian Avenue, Youyi Industrial Zone, Songling Town, Wujiang District, Suzhou City, Jiangsu Province Patentee after: WUJIANG TRANSFORMER Co.,Ltd. Address before: 210096 No. four archway, 2, Jiangsu, Nanjing Patentee before: SOUTHEAST University |
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