CN103560023B - A kind of three fracture double-acting high-speed permanent magnetic repulsion switch and methods - Google Patents
A kind of three fracture double-acting high-speed permanent magnetic repulsion switch and methods Download PDFInfo
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- CN103560023B CN103560023B CN201310572594.9A CN201310572594A CN103560023B CN 103560023 B CN103560023 B CN 103560023B CN 201310572594 A CN201310572594 A CN 201310572594A CN 103560023 B CN103560023 B CN 103560023B
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Abstract
A kind of three fracture double-acting high-speed permanent magnetic repulsion switch and methods, belong to DC switch technical field.Comprise Switch main body, high speed electromagnetic repulsive force mechanism, permanent-magnet manipulating mechanism, touch spring, insulated tension pole, separating brake drive circuit, combined floodgate drive circuit, detecting unit and control unit; Moving contact is connected to one end of insulated tension pole by touch spring, and the other end of insulated tension pole is connected with drive rod, and drive rod is connected with dynamic iron core through the metal dish in high speed electromagnetic repulsive force mechanism; Control unit connects detecting unit, separating brake drive circuit and combined floodgate drive circuit respectively; Separating brake drive circuit connects switching winding, and combined floodgate drive circuit connects closing coil.The present invention forms the fracture distance of large opening at short notice, improves the opening velocity of switch; Meanwhile, switch adopts two moving contacts to contact successively with two fixed contacts, sub-switching operation up-to-date style, solves the problems such as action that multiple stage switch drives separately is dispersed.
Description
Technical field
The invention belongs to DC switch technical field, particularly a kind of three fracture double-acting high-speed permanent magnetic repulsion switch and methods.
Background technology
Along with the continuous increase of DC power-supply system capacity, system short-circuit levels of current also constantly increases, and this just has higher requirement to the service behaviour of DC circuit breaker.Solid-state switch at microseconds time-scale disengagement failure electric current, can have the Arc-free advantage of interrupting process.But its on-state loss is large, load capacity is poor, and withstand voltage level is low.Traditional have that contact mechanical type circuit breaker insulation level is high, carrying load ability strong, but be generally tens its operate time to hundreds of millisecond, and be subject to intrinsic restriction operate time of mechanism, and response speed is slower.
Mixed type DC circuit breaker is made up of above-mentioned two kinds of switches.Under nominal situation, operating current is born by the bypass at mechanical switch place.During the fault that is short-circuited, the auxiliary switch first disengagement failure electric current of bypass, by current switching to main switch place circuit.The rapid separating brake action of high speed machine switch simultaneously, fault current is cut off by main switch.The overvoltage that interrupting process produces and energy are limited by energy-absorbing loop and absorb.Mixed type DC circuit breaker combines the advantage of mechanical switch and solid state switch, can realize cut-offfing short circuit current without electric arc fast, is the inevitable direction of DC switch technical development.Wherein, the research of high speed machine switch is one of key technology of mixed type DC circuit breaker.
Traditional breaker operation mechanism, the response speed as hydraulic mechanism and spring mechanism is comparatively slow, is difficult to requirement operate time reaching DC circuit breaker high speed mechanical switch.And the design of the high speed machine switch proposed at present adopts the contact form of single action dock mostly, even if operating mechanism has possessed higher opening velocity, also be difficult to the fracture distance at short time formation large opening, this is also that current quick electromagnetic repulsive force mechanism is only in the main cause of mesolow area research; And adopt multiple stage switch to carry out the mode of cut-offfing of connecting, although multi-break dividing potential drop can be realized, bring the problems such as the unsteadiness that between the dispersiveness of switch single movement and switch, action coordinates.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, propose a kind of simple three fracture double-acting high-speed permanent magnetic repulsion switch and the methods of structure, by the bidirectional-movement of two contacts, form the fracture distance of large opening at short notice, improve the opening velocity of switch; Simultaneously, switch adopts two moving contacts to contact successively with two fixed contacts, during sub-switching operation, can form the insulation isolation of three fractures between contact, what replace adopting the series connection of multiple stage switch with a switch cut-offs mode, solves the problems such as action that multiple stage switch drives separately is dispersed.
Technical scheme of the present invention is achieved in that a kind of three fracture double-acting high-speed permanent magnetic repulsion switchs, comprising:
Switch main body: for the motion by two moving contacts direction in opposite directions, realize the closed of three fracture double-acting high-speed permanent magnetic repulsion switchs, to bear the operating current of system; By two rightabout motions of moving contact, realize the insulation isolation of three fracture large openings of three fracture double-acting high-speed permanent magnetic repulsion switchs;
Control unit: for the detection signal according to detecting unit, controls combined floodgate drive circuit or separating brake drive circuit;
Detecting unit: be used for detecting the position signalling of insulated tension pole, notice control unit three fracture double-acting high-speed permanent magnetic repulsion switch is in "on" position or gate-dividing state;
Separating brake drive circuit: for the sub-gate signal of reception control unit, drives high speed electromagnetic repulsive force mechanism to carry out sub-switching operation;
Combined floodgate drive circuit: for the switching signal of reception control unit, drives permanent-magnet manipulating mechanism to carry out closing operation;
Insulated tension pole: for when high speed electromagnetic repulsive force mechanism moves, drives moving contact to relative or rightabout motion;
High speed electromagnetic repulsive force mechanism: for receiving the current signal of separating brake drive circuit, carry out sub-switching operation;
Permanent-magnet manipulating mechanism: for receiving the current signal of combined floodgate drive circuit, carry out closing operation;
Three described fracture double-acting high-speed permanent magnetic repulsion switchs comprise Switch main body, high speed electromagnetic repulsive force mechanism, permanent-magnet manipulating mechanism, touch spring, insulated tension pole, separating brake drive circuit, combined floodgate drive circuit, detecting unit and control unit; Moving contact in described Switch main body is connected to one end of insulated tension pole by touch spring, and the other end of insulated tension pole is connected with drive rod, and drive rod, through the metal dish in high speed electromagnetic repulsive force mechanism, is connected with the dynamic iron core in permanent-magnet manipulating mechanism; Permanent magnet in permanent-magnet manipulating mechanism, to the suction of dynamic iron core, can make two moving contacts in the later stage of separating brake or combined floodgate, remain on respective separating brake or combined floodgate terminal location; Control unit connects detecting unit, two component lock drive circuits and two combination lock drive circuits respectively; Separating brake drive circuit connects switching winding again, and combined floodgate drive circuit connects closing coil again.
Described Switch main body can the moving contact composition of self-movement primarily of metal enclosed container, two fixed contacts and two, wherein, one end of each fixed contact is all connected with external bus, and the other end of each fixed contact is connected with moving contact, in described metal enclosed container, be full of SF
6gas.
Two described fixed contacts and two can the moving contacts of independently moving, and when switch separating brake, high speed electromagnetic repulsive force mechanism drives two moving contacts to move round about simultaneously, is separated with two fixed contacts, forms the insulation isolation of three fracture large openings simultaneously; When switch closes a floodgate, permanent-magnet manipulating mechanism drives two moving contact relative motions, completes closing operation.
Described high speed electromagnetic repulsive force mechanism forms primarily of switching winding, metal dish and drive rod;
Described switching winding adopts the copper bar coiling of parallel placement to form; Metal dish material is red copper, the disk of boring a hole centered by metal dish; Certain air gap distance is had between switching winding and metal dish; Described drive rod passes this metal dish and fixes with metal dish.
Described permanent-magnet manipulating mechanism is made up of closing coil, permanent magnet, dynamic iron core and static iron core, and closing coil and permanent magnet are separately fixed on the static iron core of permanent-magnet manipulating mechanism, and dynamic iron core is connected with high speed electromagnetic repulsive force mechanism by drive rod.
One end of described insulated tension pole connects moving contact, and the other end connects the drive rod of high speed electromagnetic repulsive force mechanism, installs touch spring to prevent contact bounce when closing a floodgate, and provide certain combined floodgate precompression between insulated tension pole and moving contact.
Described every component lock drive circuit is made up of charging capacitor, thyristor and fly-wheel diode, described charging capacitor when switch separating brake, for high speed electromagnetic repulsive force mechanism provides electric energy; Often combine lock drive circuit to be made up of charging capacitor and thyristor, described charging capacitor when switch closes a floodgate, for permanent-magnet manipulating mechanism provides electric energy.
Described detecting unit is used for detecting dividing or closing position of insulated tension pole, and send position signalling to control unit, control unit controls the conducting of separating brake drive circuit or combined floodgate drive circuit according to the position signalling received: when insulated tension pole is in combined floodgate terminal location, and during next sub-switching operation, control unit is by the separating brake drive circuit of conducting high speed electromagnetic repulsive force mechanism; When insulated tension pole is in separating brake terminal location, during next closing operation, control unit is by the combined floodgate drive circuit of conducting permanent-magnet manipulating mechanism.
A control method for three fracture double-acting high-speed permanent magnetic repulsion switchs, process is:
Quick acting switching-off operating process is as follows:
Detecting unit detects that current insulated tension pole is in closing position, during sub-switching operation, control unit controls the thyristor conducting in separating brake drive circuit, charging capacitor in drive circuit discharges to the switching winding of high speed electromagnetic repulsive force mechanism, in coil, the climbing speed of electric current is exceedingly fast, around coil, produce the high frequency magnetic field of alternation, and then induction generates eddy current in copper dish; Under eddy current produces magnetic field and coil produces the interaction in magnetic field, between copper dish and switching winding, produce electromagnetic repulsion force, promote copper dish and drive rod high-speed motion fixing with it, drive insulated tension pole and moving contact action; Two moving contacts move simultaneously round about, form the fracture distance of large opening at short notice, realize the quick acting switching-off operation of switch; In separating brake latter stage, the dynamic iron core in permanent-magnet manipulating mechanism is pull-in on open position by permanent magnet, and the separating brake realizing switch keeps.
Closing operation process is as follows:
Detecting unit detects that current insulated tension pole is in open position, during closing operation, control unit controls the thyristor conducting in combined floodgate drive circuit, charging capacitor in drive circuit discharges to the closing coil of permanent-magnet manipulating mechanism, closing coil produces the magnetic field contrary with permanent magnet direction, permanent magnet reduces the suction of dynamic iron core at open position place, when electric current increases gradually, when the electromagnetic attraction produced is greater than mechanism's counter-force and permanent magnet suction, dynamic iron core starts to be moved to closing position by open position, drive drive rod, insulated tension pole and moving contact action, now two moving contact relative motions simultaneously, realize the closing operation of switch, closing a floodgate latter stage, closing coil power-off, dynamic iron core is pull-in on closing position by permanent magnet, and the combined floodgate realizing switch keeps.
Described touch spring provides precompression for moving contact, prevents contact bounce, and touch spring can also absorb the part kinetic energy of moving component simultaneously, reduces at combined floodgate anaphase movement parts the impact of Switch main body.
Beneficial effect of the present invention: three fracture double-acting high-speed permanent magnetic repulsion switch and the methods that the present invention proposes, has the following advantages:
1) Switch main body adopts two moving contact structure, and each moving contact is driven by respective high speed electromagnetic repulsive force mechanism and permanent-magnet manipulating mechanism respectively.During switch motion, two moving contacts move respectively to rightabout, and the speed of related movement between contact is the twice of traditional switch speed.
2) adopt two fixed contacts, contact form that two moving contacts clap the formula that connects, during the action of switch separating brake, two moving contacts move simultaneously, can the short time formed rapidly three fracture large openings insulation isolation, what replace the multiple switch of employing to connect with a switch cut-offs mode, solves the dispersion problem that multiple stage switch operates separately.
3) adopt high speed electromagnetic repulsive force mechanism driving switch to carry out sub-switching operation, there is the advantage that structure is simple, opening velocity is fast.Meanwhile, the switching winding due to high speed electromagnetic repulsive force mechanism adopts copper bar coiling to form, and the inductance of coil and resistance are very little, current rise rate is exceedingly fast, the response of high speed electromagnetic repulsive force mechanism is fast, can effectively reduce the intrinsic operate time of switch, improve the breaking capacity of switch.
4) rely on permanent magnet in permanent-magnet manipulating mechanism to the suction of dynamic iron core, can realize, to the maintenance of switch Contact Breaking/Making Operations lock terminal location, eliminating brake apparatus, there is structure simple, the advantage that reliability is high.
Accompanying drawing explanation
Fig. 1 is embodiments of the present invention three fracture double-acting high-speed permanent magnetic repulsion switch overall structure schematic diagram;
Fig. 2 is embodiments of the present invention three fracture double-acting high-speed permanent magnetic repulsion switch breaker in middle bulk junction composition;
Fig. 3 is the internal structure schematic diagram of the one-sided three fracture double-acting high-speed permanent magnetic repulsion switchs of embodiments of the present invention;
Fig. 4 is embodiments of the present invention separating brake electromagnetic repulsion force curve synoptic diagram;
Fig. 5 is embodiments of the present invention combined floodgate electromagnetic attraction curve synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention are described in further detail.
The three fracture double-acting high-speed permanent magnetic repulsion switchs that present embodiment adopts as shown in Figure 1, comprise Switch main body 1, metal enclosed container 2, moving contact 3 (two groups), fixed contact 4 (two groups), touch spring 5 (two groups), insulated tension pole 6 (two groups), high speed electromagnetic repulsive force mechanism 7 (two groups), permanent-magnet manipulating mechanism 8 (two groups), combined floodgate drive circuit 9 (two groups), separating brake drive circuit 10 (two groups), detecting unit 11 and control unit 12.Switch in present embodiment is symmetrical structure, and wherein each moving contact is furnished with a high speed electromagnetic repulsive force mechanism and permanent-magnet manipulating mechanism.
The structural representation of Switch main body 1 as shown in Figure 2, comprises metal enclosed container 2, two fixed contacts (fixed contact 4 and fixed contact 21) and two moving contacts (moving contact 3 and moving contact 20).In metal enclosed container 2, be full of the inert gas of good insulation preformance, in present embodiment, adopt SF
6gas.One end of fixed contact 21 connects external bus, and the other end connects one end of moving contact 20, and the other end of moving contact 20 connects one end of moving contact 3, and the other end of moving contact 3 connects one end of fixed contact 4, and the other end of fixed contact 4 connects external bus.Switch is when closing position, and two moving contacts contact to clap the form connect with fixed contact respectively; When receiving sub-gate signal, two moving contacts move simultaneously round about, form the fracture distance of large opening, realize the quick acting switching-off of switch in 1ms.
For combination lock drive circuit and a separating brake drive circuit in present embodiment, the detailed construction of three fracture double-acting high-speed permanent magnetic repulsion switchs is described, specifically as shown in Figure 3.Static iron core 19 primarily of the dynamic iron core 17 of one-sided moving contact 3, touch spring 5, insulated tension pole 6, combined floodgate drive circuit 9, separating brake drive circuit 10, detecting unit 11, control unit 12, switching winding 13, copper dish 14, drive rod 15, closing coil 16, permanent-magnet manipulating mechanism, the permanent magnet 18 of permanent-magnet manipulating mechanism and permanent-magnet manipulating mechanism forms.
Detecting unit 11, is used for detecting insulated tension pole position, also can divides/closing coil electric current by sense switch.Time initial, detecting unit 11 is started working, and the insulated tension pole state (being be in "on" position or gate-dividing state) under initial condition is sent to control unit 12.After initial condition, continue the state detecting insulated tension pole, and by the state feedback of insulated tension pole to control unit 12, provide Back ground Information for control unit 12 produces control signal.
Detecting unit mainly comprises transducer and D/A converter module.Wherein displacement transducer adopts range to be 100mm, and model is the linear displacement transducer of CWY100; Current transformer adopts CHB-200P model and CHB-8000S model respectively; 16 ADS8364 analog-digital chips that D/A converter module adopts 6 passages to sample simultaneously, the operating voltage of ADS8364 is+5V, and maximum clock frequency is 5MHz.
CWY100 type linear displacement transducer is arranged on the insulated tension pole place between electromagnetic repulsion force mechanism drive rod and touch spring, is used for detecting the position signalling of pull bar; CHB-200P type current transformer is arranged in combined floodgate drive circuit, is used for detecting the switching current of permanent-magnet manipulating mechanism; CHB-8000S type current transformer is arranged in separating brake drive circuit, is used for detecting point brake current of high speed electromagnetic repulsive force mechanism; Displacement transducer signal output is connected with ADS8364 chip.
Control unit 12, be used for switch divide/combined floodgate drive circuit controls.Three fracture double-acting high-speed permanent magnetic repulsion switchs in present embodiment are installed in the middle of DC circuit breaker.Arranged voluntarily as required by user.When after the switch installing present embodiment, first control unit 12 receives the signal from DC circuit breaker, checks the state that insulated tension pole 6 is current.If insulated tension pole is in closing position, when DC circuit breaker needs switching manipulation, control unit sends sub-gate signal to separating brake drive circuit 10, carries out sub-switching operation; If insulated tension pole is in open position, when DC circuit breaker needs switching manipulation, control unit sends switching signal to combined floodgate drive circuit 9.
Control unit mainly adopts DSP28335 chip.ADS8364 chip output is connected to the input of DSP28335 chip.
Separating brake drive circuit and the combined floodgate drive circuit of present embodiment respectively have two groups.Wherein, every component lock drive circuit is made up of 900V charging capacitor, thyristor and fly-wheel diode.Described 900V charging capacitor when switch separating brake, for high speed electromagnetic repulsive force mechanism provides electric energy.Often combine lock drive circuit to be made up of 300V charging capacitor and thyristor.Described 300V charging capacitor when switch closes a floodgate, for permanent-magnet manipulating mechanism provides electric energy.
In figure 3, combined floodgate drive circuit 9, for driving permanent-magnet manipulating mechanism 8 to carry out closing operation, forms primarily of the recharged capacitance C2 in permanent-magnet manipulating mechanism drive circuit and the thyristor SCR2 in combined floodgate drive circuit.One end of recharged capacitance C2 connects the negative pole of thyristor SCR2, the other end of recharged capacitance C2 connects one end (current input terminal) of closing coil 16, and the positive pole of thyristor SCR2 connects the other end (current output terminal) of closing coil 16.
In figure 3, separating brake drive circuit 10, carries out sub-switching operation for driving high speed electromagnetic repulsive force mechanism 7.Form primarily of the recharged capacitance C1 in high speed electromagnetic repulsive force mechanism drive circuit, the thyristor SCR1 in separating brake drive circuit and sustained diode 1.The positive pole that one end connects the negative pole of thyristor SCR1, the positive pole of thyristor SCR1 connects sustained diode 1 of recharged capacitance C1, then connect one end (current output terminal) of switching winding 13; The other end of recharged capacitance C1 connects the negative pole of sustained diode 1, then connects the other end (current input terminal) of switching winding 13.Electric current due to high speed electromagnetic repulsive force mechanism 7 rises and fall off rate is exceedingly fast, and sustained diode 1 is switching winding afterflow when current attenuation, protection separating brake drive circuit.
High speed electromagnetic repulsive force mechanism 7 is primarily of switching winding 13, and metal dish 14 and drive rod 15 form.Switching winding 13 adopts the copper bar coiling of parallel placement to form.Metal dish 14 material is the red copper conducted electricity very well, the disk of boring a hole centered by metal dish.Certain air gap distance is had between switching winding 13 and metal dish.Drive rod passes metal dish and fixes with metal dish, and drive rod one end connects insulated tension pole 6, and the other end connects the dynamic iron core 17 of permanent-magnet manipulating mechanism 8.
Permanent-magnet manipulating mechanism 8 is made up of closing coil 16, permanent magnet 18, dynamic iron core 17 and static iron core 19.Closing coil 16 and permanent magnet 18 are separately fixed on the static iron core 19 of permanent-magnet manipulating mechanism 8.Dynamic iron core 17 is connected with high speed electromagnetic repulsive force mechanism 7 by drive rod.
One end of insulated tension pole 6 connects moving contact 3, and the other end connects the drive rod 15 of high speed electromagnetic repulsive force mechanism 7, installs touch spring 5 to prevent contact bounce when closing a floodgate, and provide certain combined floodgate precompression between insulated tension pole 6 and moving contact 3.
Moving contact 3 in Switch main body 1 is connected to one end of insulated tension pole 6 by touch spring 5, the other end of insulated tension pole 6 is connected with drive rod, and drive rod, through the copper dish in high speed electromagnetic repulsive force mechanism 7, is connected with the dynamic iron core 17 in permanent-magnet manipulating mechanism 8; Permanent magnet 18 in permanent-magnet manipulating mechanism 8 to the suction of dynamic iron core 17, can make two moving contacts (moving contact 3 and moving contact 20) point/later stage of closing a floodgate, remain on respective point/combined floodgate terminal location.
Control unit 12 connects detecting unit, separating brake drive circuit 10 and combined floodgate drive circuit 9 respectively; Separating brake drive circuit 10 connects switching winding 13 again, and combined floodgate drive circuit 9 connects closing coil 16 again.
The course of work of three fracture double-acting high-speed permanent magnetic repulsion switchs is as follows:
Quick acting switching-off operating process is as follows: detecting unit 11 detects that current insulated tension pole 6 is in closing position.During switch sub-switching operation, control unit 12 controls the thyristor SCR1 conducting in separating brake drive circuit 10, charging capacitor C1 in drive circuit discharges to the switching winding 13 of high speed electromagnetic repulsive force mechanism, switching winding due to high speed electromagnetic repulsive force mechanism adopts copper bar coiling to form, inductance and the resistance of coil are minimum, therefore in coil, the climbing speed of electric current is exceedingly fast, and can produce the high frequency magnetic field of alternation around coil, can respond to generation eddy current in copper dish 14.The direction generating eddy current due to induction is contrary with the direction of the winding current, under eddy current produces magnetic field and coil produces the interaction in magnetic field, electromagnetic repulsion force can be produced between copper dish 14 and switching winding 13, promote copper dish 14 and drive rod 15 high-speed motion fixing with it, drive insulated tension pole 6 and moving contact 3 action.In separating brake latter stage, the dynamic iron core 17 in permanent-magnet manipulating mechanism can be pull-in on open position by permanent magnet 18, and the separating brake realizing switch keeps.As depicted in figs. 1 and 2, two moving contacts 3 are two dynamic, and therefore in separating brake process, two moving contacts move simultaneously round about, form the fracture distance of large opening within the 1ms time, to realize the quick acting switching-off operation of switch.As can be seen from Figure 4, the electromagnetic repulsion force rate of climb is very fast, and within the 1.5ms time, just rise to peak value, this is conducive to the action of driving switch quick acting switching-off.
Closing operation process is as follows: detecting unit 11 detects that current insulated tension pole 6 is in open position.During switch closing operation, control unit 12 controls the thyristor SCR2 conducting in combined floodgate drive circuit 9, charging capacitor C2 in drive circuit discharges to the closing coil 16 of permanent-magnet manipulating mechanism, the magnetic field that closing coil 16 produces is contrary with the magnetic direction of permanent magnet 18, permanent magnet reduces the suction of dynamic iron core at open position place, when electric current increases gradually, when the electromagnetic attraction produced is greater than mechanism's counter-force and permanent magnet suction, dynamic iron core 17 starts to be moved to closing position by open position, drives drive rod 15, insulated tension pole 6 and moving contact 3 action.Closing a floodgate latter stage, closing coil 16 power-off, dynamic iron core 17 can be pull-in on closing position by permanent magnet 18, and the combined floodgate realizing switch keeps.Touch spring 5 can provide certain precompression for moving contact 3, prevents contact bounce, and touch spring can also absorb the part kinetic energy of moving component simultaneously, to reduce at combined floodgate anaphase movement parts the impact of Switch main body.As shown in Figure 1 and Figure 2, identical with separating brake process, in making process, two moving contact 3 relative motions simultaneously, to realize the closing operation of switch.As can be seen from Figure 5, combined floodgate electromagnetic force reaches peak value at 50ms, and electromagnetic force peak value is 5100N.
Although the foregoing describe the specific embodiment of the present invention, the those skilled in the art in this area should be appreciated that these only illustrate, can make various changes or modifications, and do not deviate from principle of the present invention and essence to these execution modes.Scope of the present invention is only defined by the appended claims.
Claims (10)
1. three fracture double-acting high-speed permanent magnetic repulsion switchs, is characterized in that: comprising:
Switch main body: for the motion by two moving contacts direction in opposite directions, realize the closed of three fracture double-acting high-speed permanent magnetic repulsion switchs, to bear the operating current of system; By two rightabout motions of moving contact, realize the insulation isolation of three fracture large openings of three fracture double-acting high-speed permanent magnetic repulsion switchs;
Control unit: for the detection signal according to detecting unit, controls combined floodgate drive circuit and separating brake drive circuit;
Detecting unit: be used for detecting the position signalling of insulated tension pole, notice control unit three fracture double-acting high-speed permanent magnetic repulsion switch is in "on" position or gate-dividing state;
Separating brake drive circuit: for the sub-gate signal of reception control unit, drives high speed electromagnetic repulsive force mechanism to carry out sub-switching operation;
Combined floodgate drive circuit: for the switching signal of reception control unit, drives permanent-magnet manipulating mechanism to carry out closing operation;
Insulated tension pole: for when high speed electromagnetic repulsive force mechanism moves, drives moving contact to relative or rightabout motion;
High speed electromagnetic repulsive force mechanism: for receiving the current signal of separating brake drive circuit, carry out sub-switching operation;
Permanent-magnet manipulating mechanism: for receiving the current signal of combined floodgate drive circuit, carry out closing operation.
2. three fracture double-acting high-speed permanent magnetic repulsion switchs according to claim 1, is characterized in that: three described fracture double-acting high-speed permanent magnetic repulsion switchs comprise Switch main body, high speed electromagnetic repulsive force mechanism, permanent-magnet manipulating mechanism, touch spring, insulated tension pole, separating brake drive circuit, combined floodgate drive circuit, detecting unit and control unit; Moving contact in described Switch main body is connected to one end of insulated tension pole by touch spring, and the other end of insulated tension pole is connected with drive rod, and drive rod, through the metal dish in high speed electromagnetic repulsive force mechanism, is connected with the dynamic iron core in permanent-magnet manipulating mechanism; Permanent magnet in permanent-magnet manipulating mechanism, to the suction of dynamic iron core, can make two moving contacts in the later stage of separating brake or combined floodgate, remain on respective separating brake or combined floodgate terminal location; Control unit connects detecting unit, two component lock drive circuits and two combination lock drive circuits respectively; Separating brake drive circuit connects switching winding again, and combined floodgate drive circuit connects closing coil again.
3. three fracture double-acting high-speed permanent magnetic repulsion switchs according to claim 1, is characterized in that: described Switch main body comprises metal enclosed container (2), two fixed contacts (4; 21) and two can the moving contact (3 of self-movement; 20), one end of first fixed contact (21) connects external bus, the other end connects one end of the first moving contact (20), the other end of the first moving contact (20) connects one end of the second moving contact (3), the other end of the second moving contact (3) connects one end of the second fixed contact (4), and the other end of the second fixed contact (4) connects external bus.
4. three fracture double-acting high-speed permanent magnetic repulsion switchs according to claim 3, is characterized in that: in described metal enclosed container, be full of SF
6gas.
5. three fracture double-acting high-speed permanent magnetic repulsion switchs according to claim 3, it is characterized in that: two described fixed contacts and two can the moving contacts of independently moving, when switch separating brake, high speed electromagnetic repulsive force mechanism drives two moving contacts to move round about simultaneously, be separated with two fixed contacts, form the insulation isolation of three fracture large openings simultaneously; When switch closes a floodgate, permanent-magnet manipulating mechanism drives two moving contact relative motions, completes closing operation.
6. three fracture double-acting high-speed permanent magnetic repulsion switchs according to claim 1, is characterized in that: described high speed electromagnetic repulsive force mechanism comprises switching winding, metal dish and drive rod;
Described switching winding adopts the copper bar coiling of parallel placement to form; Metal dish material is red copper, the disk of boring a hole centered by metal dish; Certain air gap distance is had between switching winding and metal dish; Described drive rod passes this metal dish and fixes with metal dish.
7. three fracture double-acting high-speed permanent magnetic repulsion switchs according to claim 1, it is characterized in that: described permanent-magnet manipulating mechanism is made up of closing coil, permanent magnet, dynamic iron core and static iron core, closing coil and permanent magnet are separately fixed on the static iron core of permanent-magnet manipulating mechanism, and dynamic iron core is connected with high speed electromagnetic repulsive force mechanism by drive rod.
8. three fracture double-acting high-speed permanent magnetic repulsion switchs according to claim 1, it is characterized in that: one end of described insulated tension pole connects moving contact, the other end connects the drive rod of high speed electromagnetic repulsive force mechanism, touch spring is installed between insulated tension pole and moving contact to prevent contact bounce when closing a floodgate, and certain combined floodgate precompression is provided.
9. three fracture double-acting high-speed permanent magnetic repulsion switchs according to claim 1, it is characterized in that: described detecting unit is used for detecting dividing or closing position of insulated tension pole, and send position signalling to control unit, control unit controls the conducting of separating brake drive circuit or combined floodgate drive circuit according to the position signalling received: when insulated tension pole is in combined floodgate terminal location, and during next sub-switching operation, control unit is by the separating brake drive circuit of conducting high speed electromagnetic repulsive force mechanism; When insulated tension pole is in separating brake terminal location, during next closing operation, control unit is by the combined floodgate drive circuit of conducting permanent-magnet manipulating mechanism.
10. a control method for three fracture double-acting high-speed permanent magnetic repulsion switchs, is characterized in that:
Quick acting switching-off operating process is as follows:
Detecting unit detects that current insulated tension pole is in closing position, during sub-switching operation, control unit controls the thyristor conducting in separating brake drive circuit, charging capacitor in drive circuit discharges to the switching winding of high speed electromagnetic repulsive force mechanism, in coil, the climbing speed of electric current is exceedingly fast, around coil, produce the high frequency magnetic field of alternation, and then induction generates eddy current in copper dish; Under eddy current produces magnetic field and coil produces the interaction in magnetic field, between copper dish and switching winding, produce electromagnetic repulsion force, promote copper dish and drive rod high-speed motion fixing with it, drive insulated tension pole and moving contact action; Two moving contacts move simultaneously round about, form the fracture distance of large opening at short notice, realize the quick acting switching-off operation of switch; In separating brake latter stage, the dynamic iron core in permanent-magnet manipulating mechanism is pull-in on open position by permanent magnet, and the separating brake realizing switch keeps;
Closing operation process is as follows:
Detecting unit detects that current insulated tension pole is in open position, during closing operation, control unit controls the thyristor conducting in combined floodgate drive circuit, charging capacitor in drive circuit discharges to the closing coil of permanent-magnet manipulating mechanism, closing coil produces the magnetic field contrary with permanent magnet direction, permanent magnet reduces the suction of dynamic iron core at open position place, when electric current increases gradually, when the electromagnetic attraction produced is greater than mechanism's counter-force and permanent magnet suction, dynamic iron core starts to be moved to closing position by open position, drive drive rod, insulated tension pole and moving contact action, now two moving contact relative motions simultaneously, realize the closing operation of switch, closing a floodgate latter stage, closing coil power-off, dynamic iron core is pull-in on closing position by permanent magnet, and the combined floodgate realizing switch keeps,
Described touch spring provides precompression for moving contact, prevents contact bounce, and touch spring can also absorb the part kinetic energy of moving component simultaneously, reduces at combined floodgate anaphase movement parts the impact of Switch main body.
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| CN102800506B (en) * | 2012-08-19 | 2015-02-04 | 中国船舶重工集团公司第七一二研究所 | Permanent-magnet rapid operation mechanism |
| CN203038850U (en) * | 2012-11-14 | 2013-07-03 | 宁夏力成电气集团有限公司 | Axial adaptive bi-stable permanent magnetic actuator with brake acceleration |
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