CN103077837A - Automatic change-over switch and method of automatically changing over power supply - Google Patents
Automatic change-over switch and method of automatically changing over power supply Download PDFInfo
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- CN103077837A CN103077837A CN2013100064051A CN201310006405A CN103077837A CN 103077837 A CN103077837 A CN 103077837A CN 2013100064051 A CN2013100064051 A CN 2013100064051A CN 201310006405 A CN201310006405 A CN 201310006405A CN 103077837 A CN103077837 A CN 103077837A
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Abstract
The invention provides an automatic change-over switch adopting a three-stable state permanent magnetic operating mechanism, and a method of automatically changing over a power supply. The automatic change-over switch adopting the three-stable state permanent magnetic operating mechanism comprises the permanent magnetic operating mechanism, a first switch and a second switch, wherein the first switch and the second switch are connected with two ends of the permanent magnetic operating mechanism. A movable iron core has a first, a second and a third working positions. The method of automatically changing over the power supply comprises the steps: not electrifying all driving coils, and enabling the movable iron core to be stably located at the second working position. The automatic change-over switch appliance with one power supply end or another power supply closed (disconnected) can be realized by adopting the permanent magnetic operating mechanism, the mechanical tripping and latching system of the traditional automatic change-over switch can be omitted, no additional electrical interlocking device is needed, and the automatic change-over switch is retained at a switching-off or switching-on position through retentivity produced by a permanent magnet.
Description
Technical field
The present invention relates to electric power system controller switching equipment technical field, be specifically related to a kind of low-voltage electrical apparatus, particularly relate to a kind of automatic transfer switching electric appliance, namely adopt the automatic change-over of permanent-magnet operating mechanism, for example be a kind of method that adopts automatic change-over and a kind of automatic conversioning power of three-stable state permanent-magnet operating mechanism.
Background technology
Automatic change-over or automatic transfer switching electric appliance (Automatic Transfer Switching Equipment, be called for short ATSE), formed by one (or several) transfer switching equipment and other electrical equipment, for detection of power circuit, and one or several load circuit is converted to the device for switching of another power supply from a power supply.ATSE plays vital effect in for fire-fighting, subway, electric power system.Existing ATSE is furnished with inside two cover operating mechanisms usually, realizes the reliable conversion of duplicate supply by machinery and electric interlock, and structure is comparatively complicated, reliability is lower.Simplify ATSE structure, improve its reliability the development high-performance had important progradation to automatic transfer switching electric appliance.
The general composition of existing automatic transfer switching electric appliance (ATSE) comprises Switch main body and controller, Switch main body is divided into again PC level and CB level two large classes, and the operating mechanism of PC level automatic change-over all is to adopt coil moment excitatory, motion in the coil rotating shaft rotation that drives a power supply or another power supply by mechanical chain mechanism unshakable in one's determination, thereby realize that power end of automatic change-over or another one power end are closed, finish the conversion of the power supply from a road to other a tunnel in the circuit.This kind mechanism element is many, complex structure, and requirement on machining accuracy is high, the difficult control of reliability and consistency, the life-span generally only has 3000-8000 time, and needs periodic maintenance.As device for switching indispensable in the distribution system, concerning automatic change-over, will realize high reliability, long-life, non-maintaining requirement now, all also can't meet the demands fully by the automatic change-over of present this structure.
In order to address the above problem, permanent-magnet manipulating mechanism arises at the historic moment.Permanent magnet mechanism when work moving component seldom, the part sum also greatly reduces than spring operating mechanism, the breaking-closing operating that need not to thread off, locker can be realized switch or circuit breaker and the maintenance function of final position.
Existing bistable-state permanent magnet mechanism and Monostable permanent magnetic mechanism only have two stable position, are difficult to satisfy the actuating requirement of tri-station isolating switch.Patent CN 101145468A (open date: 2008.03.19; Country origin: provided a kind of automatic change-over of bi-stable permanent magnetism operating mechanism China), can between duplicate supply, switch in order to satisfy load, need to install two permanent-magnet operating mechanisms, and close a floodgate with sub-switching operation in need reasonably interoperation of two operating mechanisms, control system is comparatively complicated, and larger for the locus that two permanent-magnet operating mechanisms of placement are required, so larger with this volume that installs, structure is comparatively complicated.
Summary of the invention
The invention provides a kind of method of automatic change-over and a kind of automatic conversioning power of three-stable state permanent-magnet operating mechanism, to improve rapidity and the reliability of automatic transfer switching electric appliance and handover operation, simplify the structure of its operating mechanism, dwindle the volume of its operating mechanism.
For this reason, the present invention proposes a kind of automatic change-over that adopts the three-stable state permanent-magnet operating mechanism, the automatic change-over of described employing three-stable state permanent-magnet operating mechanism comprises: permanent-magnet operating mechanism 7 and the first switch and the second switch that are connected to permanent-magnet operating mechanism 7 two ends
Described permanent-magnet operating mechanism 7 comprises: static iron core 21, moving iron core 233, upper drive coil 22, middle drive coil 24, permanent magnet 25, lower drive coil 26 and the drive rod 20 that is connected to described moving iron core two ends about in the of 23, described static iron core 21 has inner chamber, described inner chamber comprises: the upper surface, the moving iron core mobile space of lower surface and the cylindricality between described upper surface and described lower surface, stretch out from the inner chamber of described static iron core at the two ends of described drive rod 20, and described moving iron core 23 is mobile to be arranged in the described moving iron core mobile space and to have the first service position, the second service position and the 3rd service position;
Described static iron core 21 also comprises: spaced apart and be enclosed in respectively the outer a plurality of annular dead slot of described inner chamber from top to bottom, described upper drive coil 3, middle drive coil 24 and described lower drive coil 26 are set in respectively outside the described moving iron core by described annular dead slot;
Described a plurality of annular dead slot is: spaced apart and be enclosed in respectively described moving iron core mobile space outer the first annular dead slot, the second annular dead slot and the 3rd annular dead slot from top to bottom, described upper drive coil 3 is arranged in the described first annular dead slot, described middle drive coil 24 is arranged in the described second annular dead slot, and described lower drive coil 26 is arranged in the described the 3rd annular dead slot; Described static iron core 21 also comprises: be enclosed in described inner chamber outer and separate the first annular boss 104 of the described first annular dead slot and the second annular dead slot; And: be enclosed in described moving iron core mobile space outer and separate the second annular boss 106 of the described second annular dead slot and described the 3rd annular dead slot, be provided with the space that holds described permanent magnet 25 between described the second annular boss 106 and the described moving iron core mobile space;
Described moving iron core 23 comprises: from top to bottom a plurality of grooves spaced apart, and the Fourth Ring shape boss 204 that is arranged in described moving iron core 23 and two described grooves of separating adjacent; Described moving iron core 23 also comprises: the 3rd annular boss 202 and the five rings shape boss 206 that lay respectively at shape boss 204 above and belows, described Fourth Ring, the upper surface of described moving iron core 23 is positioned on described the 3rd annular boss 202, the lower surface of described moving iron core 23 is positioned on the described five rings shape boss 206, and described moving iron core 23 also comprises: the first groove 201 and the second groove 203 between described Fourth Ring shape boss 204 and described five rings shape boss 206 between described the 3rd annular boss 202 and described Fourth Ring shape boss 204;
In described the second service position, described the first annular boss and described Fourth Ring shape boss are combined to form the first magnetic circuit diametrically mutually, described five rings shape boss and described the second annular boss are combined to form the second magnetic circuit diametrically mutually, described the first magnetic circuit and described the second communicated magnetic circuit, described the 3rd annular boss is away from the upper surface of described inner chamber, and described five rings shape boss is away from the lower surface of described inner chamber;
In described the 3rd service position, fit and form the 3rd magnetic circuit in the lower surface of described five rings shape boss and described inner chamber, described five rings shape boss and described the second annular boss are combined to form the 4th magnetic circuit diametrically mutually, described the 3rd magnetic circuit and described the 4th communicated magnetic circuit, described the 3rd annular boss is away from the upper surface of described inner chamber, and described Fourth Ring shape boss and described the first annular boss stagger mutually;
In described the first service position, fit and form the 5th magnetic circuit in the upper surface of described the 3rd annular boss and described inner chamber, described five rings shape boss and described the second annular boss are combined to form the 6th magnetic circuit diametrically mutually, described the 5th magnetic circuit and described the 6th communicated magnetic circuit, described the 3rd annular boss and described the first annular boss stagger mutually, and described five rings shape boss is away from the lower surface of described inner chamber;
Described the first switch is connected to the first end of described drive rod 20, and described second switch is connected to the second end of described drive rod 20.
Further, described the first switch comprises: the first moving contact 3 that is complementary and the first fixed contact 2, described the first moving contact 3 is connected to the first end of described drive rod 20 and is connected with the first power supply, described the first fixed contact 2 connects the first load, described the first moving contact 3 be connected corresponding described first power supply of connection of fixed contact 2 and being connected of the first load, disconnection described first power supply of correspondence of described the first moving contact 3 and the first fixed contact 2 and the disconnection of the first load.
Further, second switch comprises: the second moving contact 12 that is complementary and the second fixed contact 14, described the second moving contact 12 is connected to the second end of described drive rod 20 and is connected with second source, described the second fixed contact 14 connects the second load, described the second moving contact 12 be connected the corresponding described second source of connection of fixed contact 14 and being connected of the second load, the disconnection described second source of correspondence of described the second moving contact 12 and the second fixed contact 14 and the disconnection of the second load.
Further, described the first switch also comprises: the first connecting rod system is connected between the first end of described the first moving contact 3 and described drive rod 20.
Further, described second switch also comprises: the second connecting rod system is connected between the second end of described the second moving contact 12 and described drive rod 20.
Further, the motion track of described the first moving contact 3 is straight line, and the length direction of described straight line and described drive rod 20 is positioned on two parallel lines.
Further, described the first power supply is main power source, and described second source is stand-by power supply, and in described the first service position, described the first power supply connects described the first load, and described second source and described the second load disconnection; In described the second service position, described the first power supply and described the first load disconnect, and described second source and described the second load disconnection; In described the 3rd service position, described the first power supply and described the first load disconnect, and described second source is connected with described the second load.
Further, described the first switch also comprises: be installed in the first arc-control device 1 on described the first moving contact 3 and the first fixed contact 2, described second switch also comprises: be installed in the second arc-control device 13 on described the second moving contact 12 and the second fixed contact 14, the automatic change-over of described three-stable state permanent-magnet operating mechanism also comprises: horizontally disposed base plate and the boss that is arranged on the described base plate, described permanent-magnet operating mechanism 7 is arranged on the described boss, and described the first switch and described second switch are symmetrical arranged about described boss.
Further, the height of described drive rod 20 is higher than described the first moving contact 3, described first connecting rod system comprises: be connected with described drive rod 20 first on connecting rod 17 and first lower link 4 hinged with described the first moving contact 3, connecting rod 17 and described the first lower link 4 are hinged on described first.
The present invention also proposes a kind of method of automatic conversioning power, and the method for described automatic conversioning power is used the automatic change-over of foregoing employing three-stable state permanent-magnet operating mechanism, and the method for described automatic conversioning power comprises:
Step S1: to upper drive coil 22, middle drive coil 24 and lower drive coil 26 no power all, make described moving iron core 23 stable be in the second service position, the first power supply and the first load are disconnected, and second source and described the second load disconnection;
Further, the method of described automatic conversioning power also comprises: step S2: pass into reverse current for upper drive coil 22, centering drive coil 24 and lower drive coil 26 no powers, make described moving iron core 23 move to the first service position from the second service position, make the first power supply connect described the first load, and described second source and described the second load disconnect, then cut off the electric current of upper drive coil 22, middle drive coil 24 and lower drive coil 26, make described moving iron core 23 stable be in the first service position.
Further, the method of described automatic conversioning power also comprises: step S3: pass into forward current for lower drive coil 26, centering drive coil 24 and upper drive coil 22 no powers, make described moving iron core 23 move to the 3rd service position from the second service position, the first power supply and described the first load are disconnected, and described second source is connected with described the second load, then cut off the electric current of upper drive coil 22, middle drive coil 24 and lower drive coil 26, make described moving iron core 23 stable be in the 3rd service position.
Further, the method of described automatic conversioning power also comprises: step S20: give in lower drive coil 26 and the middle drive coil 24 and pass into respectively the positive direction electric current, to upper drive coil 22 no powers, make described moving iron core 23 move to the second service position from the first service position, make the first power supply connect described the first load, and described second source and described the second load disconnect, then cut off the electric current of upper drive coil 22, middle drive coil 24 and lower drive coil 26, make described moving iron core 23 stable be in the second service position.
Further, the method of described automatic conversioning power also comprises: step S30: give in upper drive coil 22 and the middle drive coil 24 and pass into respectively reverse current, to lower drive coil 26 no powers, make described moving iron core 23 move to the second service position from the 3rd service position, make the first power supply connect described the first load, and described second source and described the second load disconnect, then cut off the electric current of upper drive coil 22, middle drive coil 24 and lower drive coil 26, make described moving iron core 23 stable be in the second service position.
Further, described step S2 is implemented in after the step S1.
Further, described step S3 is implemented in after the step S1.
Further, described step S20 is implemented in after step S2 or the step S3.
Further, described step S30 is implemented in after step S2 or the step S3.
The present invention by a plurality of annular dead slots, annular boss and coil are set in static iron core and in moving iron core correspondence a plurality of annular boss are set, can consist of stable magnetic circuit in three different operating positions and permanent magnet, static iron core, thereby will move iron core is stabilized on these three positions, realize switching and the maintenance of three service positions, so can realize the actuating requirement of tri-station isolating switch, realize that power supply is in switching and the maintenance of three service positions.The present invention need not to thread off, locker, also need not to increase the electrical interlocks device, just can realize by the electric current of the upper drive coil of control the switching of moving three stable position of iron core, and realize the maintenance of service position by permanent magnetic under powering-off state.
Description of drawings
Fig. 1 is the internal structure schematic diagram according to the permanent-magnet operating mechanism of the embodiment of the invention;
Fig. 2 is the overall structure schematic diagram according to the automatic change-over of the embodiment of the invention;
The inside magnetic path structure schematic diagram of (second place) when Fig. 3 is positioned at the B position for the permanent-magnet operating mechanism according to the embodiment of the invention;
Fig. 4 is the structural representation that all is in gate-dividing state according to the both sides power supply of the automatic change-over of the embodiment of the invention;
Inside magnetic path structure schematic diagram when Fig. 5 is positioned at A position (primary importance) for the permanent-magnet operating mechanism according to the embodiment of the invention;
Fig. 6 is the left side power supply combined floodgate according to the automatic change-over of the embodiment of the invention, the structural representation of east power gate-dividing state;
Inside magnetic path structure schematic diagram when Fig. 7 is positioned at C position (the 3rd position) for the permanent-magnet operating mechanism according to the embodiment of the invention;
Fig. 8 is the east power combined floodgate according to the automatic change-over of the embodiment of the invention, the structural representation of left side power supply gate-dividing state.
Annotate: among above-mentioned each figure, because inner lines and label are more, for clear and directly perceived the demonstration, the in-profile lines still embody with straight line, and the magnetic line of force dots.
The drawing reference numeral explanation:
The left arc quenching system of 1-(the first arc quenching system); The left fixed contact of 2-(the first fixed contact); The left moving contact of 3-(the first moving contact); 4-lower-left connecting rod (the first lower link); The upper left rotating shaft of 5-(rotating shaft on first); The 6-boss; The 7-permanent-magnet operating mechanism; 8-bottom right connecting rod (the second lower link); The right drive terminal of 9-(the second drive terminal); The upper right connecting rod of 10-(connecting rod on second); The upper right rotating shaft of 11-(rotating shaft on second); The right moving contact of 12-(the second moving contact); The right arc quenching system of 13-(the second arc quenching system); The right fixed contact of 14-(the second fixed contact); The 15-base plate; 16-lower-left rotating shaft (the first lower rotary shaft); The upper left connecting rod of 17-(connecting rod on first); 18-bottom right rotating shaft (rotating shaft on second); The left drive terminal of 19-(the first drive terminal); The 20-drive rod; The 21-static iron core; The upper drive coil of 22-; 23-moves iron core; Drive coil among the 24-; The 25-permanent magnet; Drive coil under the 26-; 101, the lower surface of the upper surface 2061 of inner chamber 1011, inner chamber upper surface 1013, inner chamber lower surface 104, the first annular boss 105, the second annular dead slot 106, the second annular boss 201, the first groove 202, the 3rd annular boss 203, the second groove 204, Fourth Ring shape boss 206, five rings shape boss 2021, moving iron core, moving iron core
Embodiment
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, now contrast description of drawings the specific embodiment of the present invention.
As shown in Figure 2, the automatic change-over according to the employing three-stable state permanent-magnet operating mechanism of the embodiment of the invention comprises: permanent-magnet operating mechanism 7 and be connected to the first switch and the second switch at permanent-magnet operating mechanism 7 two ends.The main distinction of the automatic change-over of the present invention and existing bistable state permanent magnet operating mechanism is: the permanent-magnet operating mechanism 7 that the present invention adopts is the permanent-magnet operating mechanisms with three stable states, Duoed a stable state than existing bistable state permanent magnet operating mechanism, be that the permanent-magnet operating mechanism 7 that the present invention adopts has three stable service positions, except can adopting of the present invention the setting, also can adopt existing various operating switch as for the first switch that is connected to permanent-magnet operating mechanism 7 two ends and second switch.
As shown in Figure 1, described permanent-magnet operating mechanism 7 comprises: static iron core 21, moving iron core 23, upper drive coil 22, middle drive coil 24, permanent magnet 25, lower drive coil 26 and be connected to the drive rod 20 at described moving iron core two ends about in the of 23, described static iron core 21 has inner chamber, stretch out from the inner chamber 101 of described static iron core at the two ends of described drive rod 20, and described moving iron core 23 is mobile to be arranged in the described moving iron core mobile space and to have the first service position, the second service position and the 3rd service position.
In the present embodiment, the second service position is b (or B position), such as Fig. 3, namely moving iron core 23 is in the centre position in the static iron core 21, this position is neither moving iron core 23 is in the position (being position a or A) of static iron core 21 upper ends, neither move the position (being position c) that iron core 23 is in static iron core 11 lower ends, this is one of difference with the prior art of the present invention.Prior art can only realize that moving iron core 23 is in the position of static iron core 21 upper ends or lower end by Electromagnetic Control, can not realize keeping in the stable state of b position, if and adopt the control of the mechanical parts such as spring, make iron core 23 be in the b position, then can increase the complexity of structure, and because the wearing and tearing of the mechanical parts such as spring easily cause the problems such as control error.
Described static iron core 21 also comprises: spaced apart and be enclosed in respectively the outer a plurality of annular dead slot of described inner chamber from top to bottom, annular dead slot plays the effect of holding coil, when coil blackout, also plays the effect of the interval magnetic line of force.Described upper drive coil 3, middle drive coil 24 and described lower drive coil 26 are set in respectively outside the described moving iron core 23 by described annular dead slot.
Described a plurality of annular dead slot is: spaced apart and be enclosed in respectively described moving iron core mobile space outer the first annular dead slot, the second annular dead slot and the 3rd annular dead slot from top to bottom, described upper drive coil 22 is arranged in the described first annular dead slot, described middle drive coil 24 is arranged in the described second annular dead slot, and described lower drive coil 26 is arranged in the described the 3rd annular dead slot; Described static iron core 21 also comprises: be enclosed in described inner chamber outer and separate the first annular boss 104 of the described first annular dead slot and the second annular dead slot; And: be enclosed in described moving iron core mobile space outer and separate the second annular boss 106 of the described second annular dead slot and described the 3rd annular dead slot, be provided with the space that holds described permanent magnet 25 between described the second annular boss 106 and the described moving iron core mobile space.
Described moving iron core 23 comprises: from top to bottom a plurality of grooves spaced apart, and the Fourth Ring shape boss 204 that is arranged in described moving iron core 23 and two described grooves of separating adjacent; Described moving iron core 23 also comprises: the 3rd annular boss 202 and the five rings shape boss 206 that lay respectively at shape boss 204 above and belows, described Fourth Ring, the upper surface of described moving iron core 23 is positioned on described the 3rd annular boss 202, the lower surface of described moving iron core 23 is positioned on the described five rings shape boss 206, and described moving iron core 23 also comprises: the first groove 201 and the second groove 203 between described Fourth Ring shape boss 204 and described five rings shape boss 206 between described the 3rd annular boss 202 and described Fourth Ring shape boss 204.
As shown in Figure 3, in described the second service position, described the first annular boss 104 and described Fourth Ring shape boss 204 are mutually involutory diametrically, and (herein involutory can be to fit, overlap, adhesive or cooperation) formation the first magnetic circuit, described five rings shape boss and described the second annular boss are combined to form the second magnetic circuit diametrically mutually, described the first magnetic circuit and described the second communicated magnetic circuit, form closed magnetic path, so, moving iron core 23 is in stable position, namely moving iron core is subject to external disturbance and when departing from a little this position, moving iron core 23 suffered magnetic force can drive it and get back to this stable position.In b (or B) position, described the 3rd annular boss is away from the upper surface of described inner chamber, and described five rings shape boss is away from the lower surface of described inner chamber; Be the upper surface 2021 of described moving iron core 23 away from the upper surface 1011 of described inner chamber, the lower surface 2061 of described moving iron core 23 is away from the lower surface 1013 of described inner chamber.Between permanent magnet 25 and the five rings shape boss 206 the stronger magnetic line of force is arranged, the magnetic line of force between this magnetic line of force and the first annular boss 104 and the Fourth Ring shape boss 204 forms closed magnetic path, simultaneously, do not form magnetic circuit between the 3rd annular boss 202 of moving iron core 23 and the static iron core 1, thereby moving iron core 23 can remain on the b position.
In described the 3rd service position, such as Fig. 7, (lower end that is drive rod is positioned at position c) described the 5th convex annular 206 is fitted with the lower surface 2061 of described inner chamber and is formed the 3rd magnetic circuit, described five rings shape boss 206 is combined to form the 4th magnetic circuit diametrically mutually with described the second annular boss 106, described the 3rd magnetic circuit and described the 4th communicated magnetic circuit, described the 3rd annular boss 202 is away from the upper surface 1011 of described inner chamber, and described Fourth Ring shape boss 204 staggers mutually with described the first annular boss 104.
In described the first service position, (upper end that is drive rod is positioned at position A) is such as Fig. 5, described the 3rd annular boss 202 is fitted with the upper surface 1011 of described inner chamber and is formed the 5th magnetic circuit, described five rings shape boss 206 is combined to form the 6th magnetic circuit diametrically mutually with described the second annular boss 106, described the 5th magnetic circuit and described the 6th communicated magnetic circuit, described the 3rd annular boss 202 staggers diametrically mutually with described the first annular boss 104, and described five rings shape boss 206 is away from the lower surface of described inner chamber.Among Fig. 5, between permanent magnet 25 and the five rings shape boss 206 the stronger magnetic line of force is arranged, the magnetic line of force between the upper end of this magnetic line of force and static iron core 21 and the 3rd annular boss 202 forms closed magnetic path, simultaneously, the first annular boss 104 does not form closed magnetic path with described Fourth Ring shape boss 204, thereby moving iron core 23 can remain on a position.
Described the first switch is connected to the first end of described drive rod 20, described second switch is connected to the second end of described drive rod 20, because moving iron core 23 has three service positions, thereby the first switch and the second switch that are connected with described drive rod 20 can have three service positions.
Further, as shown in Figure 2, described the first switch comprises: the first moving contact 3 that is complementary and the first fixed contact 2, described the first moving contact 3 is connected to the first end of described drive rod 20 and is connected with the first power supply (not shown), described the first fixed contact 2 connects the first load (not shown), the first moving contact 3 and the 2 corresponding configurations of the first fixed contact, described the first moving contact 3 be connected corresponding described first power supply of connection of fixed contact 2 and being connected of the first load, disconnection described first power supply of correspondence of described the first moving contact 3 and the first fixed contact 2 and the disconnection of the first load.Like this, can realize the auto switching of the first power supply.
Further, as shown in Figure 2, second switch comprises: the second moving contact 12 that is complementary and the second fixed contact 14, described the second moving contact 12 is connected to the second end of described drive rod 20 and is connected with the second source (not shown), described the second fixed contact 14 connects the second load (not shown), described the second moving contact 12 be connected the corresponding described second source of connection of fixed contact 14 and being connected of the second load, the disconnection described second source of correspondence of described the second moving contact 12 and the second fixed contact 14 and the disconnection of the second load.Like this, can realize the auto switching of second source.
Further, as shown in Figure 2, described the first switch also comprises: the first connecting rod system is connected between the first end of described the first moving contact 3 and described drive rod 20.Can overcome the limitation in position and space by push and pull system, realize that permanent-magnet operating mechanism is connected with the flexible of each switch.
Further, as shown in Figure 2, described second switch also comprises: the second connecting rod system is connected between the second end of described the second moving contact 12 and described drive rod 20.
Can overcome the limitation in position and space by each push and pull system, realize that permanent-magnet operating mechanism is connected with the flexible of each switch.
Further, as shown in Figure 2, the motion track of described the first moving contact 3 is straight line, and the length direction of described straight line and described drive rod 20 is positioned on two parallel lines.Like this, can guarantee that the first moving contact 3 and the first fixed contact 2 cooperate stable.
Further, described the first power supply is main power source, and described second source is stand-by power supply.Namely the first fixed contact 2 connects the first load, connects main power source on the first moving contact 3.The second fixed contact 14 connects the second load, and the second moving contact 12 connects stand-by power supply.
In described the first service position, such as Fig. 6, the first moving contact 3 be connected fixed contact 2 and connect, described the first power supply connects described the first load, and the second moving contact 12 and the second fixed contact 14 disconnect, described second source and described the second load disconnection.
In described the second service position, such as Fig. 4, the first moving contact 3 and the first fixed contact 2 disconnect, and described the first power supply and described the first load disconnect, and the second moving contact 12 and the second fixed contact 14 disconnect, and described second source and described the second load disconnect.
In described the 3rd service position, such as Fig. 8, the first moving contact 3 and the first fixed contact 2 disconnect, and described the first power supply disconnects with described the first load, and, the second moving contact 12 be connected fixed contact 14 connections, described second source is connected with described the second load.
The present invention can so that three kinds of matching relationships are arranged between main power source and the stand-by power supply, fully satisfy the needs that power supply automaticallyes switch by the setting of three service positions.
Further, described the first switch also comprises: be installed in the first arc-control device 1 on described the first moving contact 3 and the first fixed contact 2, described second switch also comprises: be installed in the second arc-control device 13 on described the second moving contact 12 and the second fixed contact 14, the automatic change-over of described three-stable state permanent-magnet operating mechanism also comprises: horizontally disposed base plate 15 and the boss 6 that is arranged on the described base plate, described permanent-magnet operating mechanism 7 is arranged on the described boss, for example, permanent-magnet operating mechanism 7 is arranged in the groove of described boss.Described the first switch and described second switch are symmetrical arranged about described boss 6.Arc-control device 1 or arc-control device 13 can be a utmost point or multipole arc quenching system.Can prevent electric arc by each arc-control device.
Further, the height of described drive rod 20 is higher than described the first moving contact 3, described first connecting rod system comprises: with described drive rod 20 by the first drive terminal 9 be connected first on connecting rod 17 and with described the first moving contact 3 by the first hinged lower link 4 of the first lower rotary shaft 16, connecting rod 17 and described the first lower link 4 are hinged by rotating shaft 5 on first on described first.
Second connecting rod system and first connecting rod symmetry system having symmetry arrange, the second connecting rod system comprises: with described drive rod 20 by the second drive terminal 19 be connected second on connecting rod 10 and with described the second moving contact 12 by the second hinged lower link 8 of the second lower rotary shaft 18, connecting rod 10 and described the second lower link 8 are hinged by rotating shaft 11 on second on described second.
On described first in the rotating shaft 5 and second rotating shaft 11 are two stocks fixing in the locus, only do rotation around the geometric centre axes of oneself, on first in the rotating shaft 5 and second rotating shaft 11 can be with a utmost point also can be with three utmost points or four utmost point movable contact systems, length is set as required.
The present invention adopts a permanent-magnet operating mechanism to drive each rotating shaft by each connecting rod and turns an angle, each rotating shaft drives again each connecting rod and drives moving each contact motion, thereby realize the automatic transfer switching electric appliance that a power end or another one power end are closed or disconnect, cancelled mechanical trip, the fastener system of traditional automatic change-over, the confining force that produces by permanent magnet with automatic change-over remain on minute, closing position.This apparatus structure is simple, and volume is little, and reliability is high.
The present invention also proposes a kind of method of automatic conversioning power, and the method for described automatic conversioning power is used the automatic change-over of foregoing employing three-stable state permanent-magnet operating mechanism, and the method for described automatic conversioning power comprises:
Step S1: such as Fig. 1 to Fig. 4, to upper drive coil 22, middle drive coil 24 and lower drive coil 26 no power all, make described moving iron core 23 stable be in the second service position (B position), the first power supply and the first load are disconnected, and second source and described the second load disconnection.The left half of outflow of bus current paper of definition Fig. 1 coil, the sense of current when the right half of electric current of coil flows into paper is the electric current positive direction.Such as Fig. 3, drive rod is stabilized in service position B, the magnetic flux that this moment, permanent magnet 25 produced is mainly by passing through in the magnetic circuit that comprises the tooth that tooth that static iron core 21 is provided with and moving iron core 23 are provided with, moving iron core is subject to external disturbance and when departing from a little this position, the moving suffered magnetic force of iron core can drive it and get back to this stable position, and the magnetizing direction of the permanent magnet on the left side among definition Fig. 3 be level left, the magnetizing direction of the permanent magnet on the right be level to the right.
What reference was shown in Figure 4 is when the three-stable state permanent-magnet operating mechanism is stabilized in position B, the state of automatic change-over maintenance and two power supply separating brakes, connect main power source on the first moving contact 3, connect accessory power supply above the second moving contact 12, the first fixed contact 2 and connect power load above the second fixed contact 14.
Further, the method of described automatic conversioning power also comprises: step S2: pass into reverse current for upper drive coil 22, centering drive coil 24 and lower drive coil 26 no powers, make described moving iron core 23 move to the first service position from the second service position, make the first power supply connect described the first load, and described second source and described the second load disconnect, then cut off the electric current of upper drive coil 22, middle drive coil 24 and lower drive coil 26, make described moving iron core 23 stable be in the first service position (A position).
Further, the method of described automatic conversioning power also comprises: step S3: pass into forward current for lower drive coil 26, centering drive coil 24 and upper drive coil 22 no powers, (B position) moves to the 3rd service position (C position) from the second service position to make described moving iron core 23, the first power supply and described the first load are disconnected, and described second source is connected with described the second load, then cut off the electric current of upper drive coil 22, middle drive coil 24 and lower drive coil 26, make described moving iron core 23 stable be in the 3rd service position.
Further, the method of described automatic conversioning power also comprises: step S20: give in lower drive coil 26 and the middle drive coil 24 and pass into respectively the positive direction electric current, to upper drive coil 22 no powers, make described moving iron core 23 move to the second service position from the first service position, make the first power supply connect described the first load, and described second source and described the second load disconnect, then cut off the electric current of upper drive coil 22, middle drive coil 24 and lower drive coil 26, make described moving iron core 23 stable be in the second service position.
Further, the method of described automatic conversioning power also comprises: step S30: give in upper drive coil 22 and the middle drive coil 24 and pass into respectively reverse current, to lower drive coil 26 no powers, make described moving iron core 23 move to the second service position from the 3rd service position, make the first power supply connect described the first load, and described second source and described the second load disconnect, then cut off the electric current of upper drive coil 22, middle drive coil 24 and lower drive coil 26, make described moving iron core 23 stable be in the second service position.
The second service position need not energising and can obtain, so, the present invention can be with the second service position as initial position, this matches with the operating sequence in when energising, at initial position, the first power supply and the first load disconnect, and second source and described the second load disconnection, have guaranteed the handling safety of initial position.During work, break-make by relevant coil can be as required, make iron core 23 switch to the first service position (A position) or the 3rd service position (C position) from initial position, then again by the break-make of coil and the setting of the sense of current, (A position) or the 3rd service position (C position) switches to initial position from the first service position to make iron core 23, perhaps, adjust back and forth.Wherein, use the coil of three diverse locations, so that the adjustment of magnetic circuit is more sensitive.
Further, in order to realize the switching of above-mentioned three service positions, on the basis of above-mentioned steps, can progressively realize from the first service position (A position) to the 3rd service position (C position), perhaps (C position) switching of (A position) to the first service position from the 3rd service position.Be that described step S2 is implemented in after the step S1; Perhaps, described step S3 is implemented in after the step S1; Perhaps, described step S20 is implemented in after step S2 or the step S3; Perhaps, described step S30 is implemented in after step S2 or the step S3.
The below does concrete description to process wherein.
For example, when permanent-magnet operating mechanism is in position B shown in Figure 3, checkout gear collects the signal that needs closed main power switch, checkout gear can produce signal to be come to upper drive coil 22 chargings, other coil no power, making the magnetic direction of the electric current generation of charging is identical with the direction that permanent magnet produces, pass into reverse current namely for upper drive coil 22, other coil no powers, moving iron core 23 just is subject to magnetic force upwards, drive drive rod 20 beginnings to stable position A motion, the Distribution of Magnetic Field schematic diagram of mechanism as shown in Figure 5 at this moment.In the process in the process that drive rod 20 moves to the A position, the upper right connecting rod 10 of right drive terminal 9 drives that is fixedly linked with drive rod 20 turns clockwise around upper right rotating shaft 11, also turn clockwise thereby drive bottom right connecting rod 8, bottom right connecting rod 8 drives right moving contact 12 by bottom right rotating shaft 18 and deviates from right fixed contact 14 motions (level left).Simultaneously, in the process that drive rod 20 moves to A, the upper left connecting rod 17 of left drive terminal 19 drives that is fixedly linked with drive rod 20 turns clockwise around upper left rotating shaft 5, thereby driving lower-left connecting rod 4 also turns clockwise, lower-left connecting rod 4 drives left moving contact 3 towards left fixed contact 2 motions (level left) by lower-left rotating shaft 16, realize connecting main power source, as shown in Figure 6.Subsequently, moving iron core 23 drives drive rod 20 and moves to position A, cut off the electric current of all coils, moving iron core 23 just is pull-in on the upper end of static iron core 21 under the effect of the magnetic field force that permanent magnet provides, thereby be stabilized on the A of position, this moment this mechanism Distribution of Magnetic Field schematic diagram as shown in Figure 5 (Distribution of Magnetic Field dots), obviously this position is a stable position, and the suction-combining force of permanent magnet will provide the stronger switch required confining force that closes a floodgate.
When permanent-magnet operating mechanism is in position A shown in Figure 5, checkout gear collects the signal that needs to cut off main power switch, checkout gear can produce signal to be come to passing into respectively other coil no power of positive direction electric current in lower drive coil 26 and the middle drive coil 24, moving iron core 23 just is subject to downward magnetic force, driving drive rod 20 beginnings moves to stable position B, in the process in the process that drive rod 20 moves to B, the upper right connecting rod 10 of right drive terminal 9 drives that is fixedly linked with drive rod 20 is rotated counterclockwise around upper right rotating shaft 11, also be rotated counterclockwise thereby drive bottom right connecting rod 8, bottom right connecting rod 8 drives right moving contact 12 towards right fixed contact 14 motions (level to the right) by bottom right rotating shaft 18.Simultaneously, in the process that drive rod 20 moves to B, the upper left connecting rod 17 of left drive terminal 19 drives that is fixedly linked with drive rod 20 is rotated counterclockwise around upper left rotating shaft 5, thereby driving lower-left connecting rod 4 also is rotated counterclockwise, lower-left connecting rod 4 drives left moving contact 3 by lower-left rotating shaft 16 and deviates from left fixed contact 2 motions (level to the right), realize cutting off main power source, for closed accessory power supply is prepared, as shown in Figure 4.Subsequently, moving iron core 23 drives drive rod 20 and moves to position B, cut off the electric current of all coils, moving iron core 23 just is pull-in on the upper end of static iron core 21 under the effect of the magnetic field force that permanent magnet provides, thereby be stabilized on the B of position, this moment this mechanism Distribution of Magnetic Field schematic diagram as shown in Figure 3 (Distribution of Magnetic Field dots), obviously this position is a stable position, and the suction-combining force of permanent magnet will provide the stronger switch required confining force that closes a floodgate.
When drive rod 20 is stabilized in position B, checkout gear collects the signal that needs closed accessory power supply switch, checkout gear can produce signal to be come to lower drive coil 26 chargings, other coil no power, making the magnetic direction of the electric current generation of charging is identical with the direction that permanent magnet produces, pass into forward current namely for lower drive coil 26, other coil no powers, moving iron core 23 just is subject to downward magnetic force, drive drive rod 20 beginnings to stable position C motion, the Distribution of Magnetic Field schematic diagram of mechanism as shown in Figure 7 at this moment.In the process in the process that drive rod 20 moves to C, the upper right connecting rod 10 of right drive terminal 9 drives that is fixedly linked with drive rod 20 is rotated counterclockwise around upper right rotating shaft 11, also be rotated counterclockwise thereby drive bottom right connecting rod 8, bottom right connecting rod 8 drives right moving contact 12 by bottom right rotating shaft 18 and deviates from right fixed contact 14 motions (level to the right).Simultaneously, in the process that drive rod 20 moves to A, the upper left connecting rod 17 of left drive terminal 19 drives that is fixedly linked with drive rod 20 is rotated counterclockwise around upper left rotating shaft 5, thereby driving lower-left connecting rod 4 also is rotated counterclockwise, lower-left connecting rod 4 drives left moving contact 3 by lower-left rotating shaft 16 and deviates from left fixed contact 2 motions (level to the right), realize connecting accessory power supply, as shown in Figure 8.Subsequently, moving iron core 23 drives drive rod 20 and moves to position C, cut off the electric current of all coils, moving iron core 23 just is pull-in on the lower end of static iron core 21 under the effect of the magnetic field force that permanent magnet provides, thereby be stabilized on the C of position, this moment this mechanism Distribution of Magnetic Field schematic diagram as shown in Figure 7 (Distribution of Magnetic Field dots), obviously this position is a stable position, and the suction-combining force of permanent magnet will provide the stronger switch required confining force that closes a floodgate.
Then, pass into respectively reverse current in upper drive coil 22 and middle drive coil 24, moving iron core 2 will move from position C to position B under the magnetic field force effect this moment, thereby get back to position B.So far, this mechanism has finished a complete duty cycle.
The present invention can improve rapidity and the reliability of automatic transfer switching electric appliance and handover operation, simplifies the structure of operating mechanism, dwindles the volume of operating mechanism.Thereby the present invention adopts permanent-magnet operating mechanism to turn an angle by the driving mechanical connecting rod and realizes the automatic transfer switching electric appliance of a power end or another one power end closed (or disconnection), mechanical trip, the fastener system of traditional automatic change-over have been cancelled, also need not to increase the electrical interlocks device, the confining force that produces by permanent magnet with automatic change-over remain on minute, closing position.That the present invention has advantages of is simple in structure, reliability is high, controllability good.
The above only is the schematic embodiment of the present invention, is not to limit scope of the present invention.For each part of the present invention can make up under the condition of not conflicting mutually, any those skilled in the art, the equivalent variations of having done under the prerequisite that does not break away from design of the present invention and principle and modification all should belong to the scope of protection of the invention.
Claims (18)
1. automatic change-over that adopts the three-stable state permanent-magnet operating mechanism, it is characterized in that, the automatic change-over of described employing three-stable state permanent-magnet operating mechanism comprises: permanent-magnet operating mechanism (7) and be connected to the first switch and the second switch at described permanent-magnet operating mechanism (7) two ends
Described permanent-magnet operating mechanism (7) comprising: static iron core (21), moving iron core (23), upper drive coil (22), middle drive coil (24), permanent magnet (25), lower drive coil (26) and be connected to the up and down drive rod at two ends (20) of described moving iron core (23), described static iron core (21) has inner chamber, described inner chamber comprises: the upper surface, the moving iron core mobile space of lower surface and the cylindricality between described upper surface and described lower surface, stretch out from the inner chamber of described static iron core at the two ends of described drive rod (20), and described moving iron core (23) is mobile to be arranged in the described moving iron core mobile space and to have the first service position, the second service position and the 3rd service position;
Described static iron core (21) also comprises: spaced apart and be enclosed in respectively the outer a plurality of annular dead slot of described inner chamber from top to bottom, described upper drive coil (22), middle drive coil (24) and described lower drive coil (26) are set in respectively outside the described moving iron core by described annular dead slot;
Described a plurality of annular dead slot is: spaced apart and be enclosed in respectively described moving iron core mobile space outer the first annular dead slot, the second annular dead slot and the 3rd annular dead slot from top to bottom, described upper drive coil (22) is arranged in the described first annular dead slot, described middle drive coil (24) is arranged in the described second annular dead slot, and described lower drive coil (26) is arranged in the described the 3rd annular dead slot; Described static iron core (21) also comprises: be enclosed in described inner chamber outer and separate first annular boss (104) of the described first annular dead slot and the second annular dead slot; And: be enclosed in described moving iron core mobile space outer and separate second annular boss (106) of the described second annular dead slot and described the 3rd annular dead slot, be provided with the space that holds described permanent magnet (25) between described the second annular boss (106) and the described moving iron core mobile space;
Described moving iron core (23) comprising: from top to bottom a plurality of grooves spaced apart, and the Fourth Ring shape boss (204) that is arranged in described moving iron core (23) and two described grooves of separating adjacent; Described moving iron core (23) also comprises: the 3rd annular boss (202) and the five rings shape boss (206) that lay respectively at described Fourth Ring shape boss (204) above and below, the upper surface of described moving iron core (23) is positioned on described the 3rd annular boss (202), the lower surface of described moving iron core (23) is positioned on the described five rings shape boss (206), and described moving iron core (23) also comprises: be positioned at the first groove (201) between described the 3rd annular boss (202) and the described Fourth Ring shape boss (204) and be positioned at the second groove (203) between described Fourth Ring shape boss (204) and the described five rings shape boss (206);
In described the second service position, described the first annular boss and described Fourth Ring shape boss are combined to form the first magnetic circuit diametrically mutually, described five rings shape boss and described the second annular boss are combined to form the second magnetic circuit diametrically mutually, described the first magnetic circuit and described the second communicated magnetic circuit, described the 3rd annular boss is away from the upper surface of described inner chamber, and described five rings shape boss is away from the lower surface of described inner chamber;
In described the 3rd service position, fit and form the 3rd magnetic circuit in the lower surface of described five rings shape boss and described inner chamber, described five rings shape boss and described the second annular boss are combined to form the 4th magnetic circuit diametrically mutually, described the 3rd magnetic circuit and described the 4th communicated magnetic circuit, described the 3rd annular boss is away from the upper surface of described inner chamber, and described Fourth Ring shape boss and described the first annular boss stagger mutually;
In described the first service position, fit and form the 5th magnetic circuit in the upper surface of described the 3rd annular boss and described inner chamber, described five rings shape boss and described the second annular boss are combined to form the 6th magnetic circuit diametrically mutually, described the 5th magnetic circuit and described the 6th communicated magnetic circuit, described the 3rd annular boss and described the first annular boss stagger mutually, and described five rings shape boss is away from the lower surface of described inner chamber;
Described the first switch is connected to the first end of described drive rod (20), and described second switch is connected to the second end of described drive rod (20).
2. the automatic change-over of employing three-stable state permanent-magnet operating mechanism as claimed in claim 1, it is characterized in that, described the first switch comprises: the first moving contact (3) that is complementary and the first fixed contact (2), described the first moving contact (3) is connected to the first end of described drive rod (20) and is connected with the first power supply, described the first fixed contact (2) connects the first load, described the first moving contact (3) be connected corresponding described first power supply of connection of fixed contact (2) and being connected of the first load, disconnection described first power supply of correspondence of described the first moving contact (3) and the first fixed contact (2) and the disconnection of the first load.
3. the automatic change-over of three-stable state permanent-magnet operating mechanism as claimed in claim 1 or 2, it is characterized in that, second switch comprises: the second moving contact (12) that is complementary and the second fixed contact (14), described the second moving contact (12) is connected to the second end of described drive rod (20) and is connected with second source, described the second fixed contact (14) connects the second load, described the second moving contact (12) be connected the corresponding described second source of connection of fixed contact (14) and being connected of the second load, the disconnection described second source of correspondence of described the second moving contact (12) and the second fixed contact (14) and the disconnection of the second load.
4. the automatic change-over of three-stable state permanent-magnet operating mechanism as claimed in claim 2 is characterized in that, described the first switch also comprises: the first connecting rod system is connected between the first end of described the first moving contact (3) and described drive rod (20).
5. the automatic change-over of three-stable state permanent-magnet operating mechanism as claimed in claim 3, it is characterized in that, described second switch also comprises: the second connecting rod system is connected between the second end of described the second moving contact (12) and described drive rod (20).
6. the automatic change-over of three-stable state permanent-magnet operating mechanism as claimed in claim 2, it is characterized in that, the motion track of described the first moving contact (3) is straight line, and the length direction of described straight line and described drive rod (20) is positioned on two parallel lines.
7. the automatic change-over of three-stable state permanent-magnet operating mechanism as claimed in claim 3, it is characterized in that, described the first power supply is main power source, described second source is stand-by power supply, in described the first service position, described the first power supply connects described the first load, and described second source and described the second load disconnection; In described the second service position, described the first power supply and described the first load disconnect, and described second source and described the second load disconnection; In described the 3rd service position, described the first power supply and described the first load disconnect, and described second source is connected with described the second load.
8. the automatic change-over of three-stable state permanent-magnet operating mechanism as claimed in claim 3, it is characterized in that, described the first switch also comprises: be installed in the first arc-control device (1) on described the first moving contact (3) and the first fixed contact (2), described second switch also comprises: be installed in the second arc-control device (13) on described the second moving contact (12) and the second fixed contact (14), the automatic change-over of described three-stable state permanent-magnet operating mechanism also comprises: horizontally disposed base plate and the boss that is arranged on the described base plate, described permanent-magnet operating mechanism (7) is arranged on the described boss, and described the first switch and described second switch are symmetrical arranged about described boss.
9. the automatic change-over of three-stable state permanent-magnet operating mechanism as claimed in claim 4, it is characterized in that, the height of described drive rod (20) is higher than described the first moving contact (3), described first connecting rod system comprises: be connected with described drive rod (20) first on connecting rod (17) and first lower link (4) hinged with described the first moving contact (3), connecting rod (17) and described the first lower link (4) are hinged on described first.
10. the method for an automatic conversioning power is characterized in that, the method for described automatic conversioning power is used the automatic change-over such as each described employing three-stable state permanent-magnet operating mechanism in the claim 1 to 9, and the method for described automatic conversioning power comprises:
Step S1: to upper drive coil (22), middle drive coil (24) and lower drive coil (26) no power all, make described moving iron core (23) stable be in the second service position, the first power supply and the first load are disconnected, and second source and described the second load disconnection.
11. the method for automatic conversioning power as claimed in claim 10, it is characterized in that, the method of described automatic conversioning power also comprises: step S2: pass into reverse current for upper drive coil (22), centering drive coil (24) and lower drive coil (26) no power, make described moving iron core (23) move to the first service position from the second service position, make the first power supply connect described the first load, and described second source and described the second load disconnect, then cut off upper drive coil (22), the electric current of middle drive coil (24) and lower drive coil (26), make described moving iron core (23) stable be in the first service position.
12. the method for automatic conversioning power as claimed in claim 10, it is characterized in that, the method of described automatic conversioning power also comprises: step S3: pass into forward current for lower drive coil (26), centering drive coil (24) and upper drive coil (22) no power, make described moving iron core (23) move to the 3rd service position from the second service position, the first power supply and described the first load are disconnected, and described second source is connected with described the second load, then cut off upper drive coil (22), the electric current of middle drive coil (24) and lower drive coil (26), make described moving iron core (23) stable be in the 3rd service position.
13. the method such as claim 11 or 12 described automatic conversioning powers, it is characterized in that, the method of described automatic conversioning power also comprises: step S20: give in lower drive coil (26) and the middle drive coil (24) and pass into respectively the positive direction electric current, to upper drive coil (22) no power, make described moving iron core (23) move to the second service position from the first service position, make the first power supply connect described the first load, and described second source and described the second load disconnect, then cut off upper drive coil (22), the electric current of middle drive coil (24) and lower drive coil (26), make described moving iron core (23) stable be in the second service position.
14. the method such as claim 11 or 12 described automatic conversioning powers, it is characterized in that, the method of described automatic conversioning power also comprises: step S30: give in upper drive coil (22) and the middle drive coil (24) and pass into respectively reverse current, to lower drive coil (26) no power, make described moving iron core (23) move to the second service position from the 3rd service position, make the first power supply connect described the first load, and described second source and described the second load disconnect, then cut off upper drive coil (22), the electric current of middle drive coil (24) and lower drive coil (26), make described moving iron core (23) stable be in the second service position.
15. the method for automatic conversioning power as claimed in claim 11 is characterized in that, described step S2 is implemented in after the step S1.
16. the method for automatic conversioning power as claimed in claim 12 is characterized in that, described step S3 is implemented in after the step S1.
17. the method for automatic conversioning power as claimed in claim 13 is characterized in that, described step S20 is implemented in after step S2 or the step S3.
18. the method for automatic conversioning power as claimed in claim 14 is characterized in that, described step S30 is implemented in after step S2 or the step S3.
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| CN107833764A (en) * | 2017-12-01 | 2018-03-23 | 浙江科诺电力发展有限公司 | A kind of non-concurrent closure, disconnect biswitch stopping means |
| CN110504131A (en) * | 2018-05-17 | 2019-11-26 | 王静洋 | A kind of dual power supply automatic switching device |
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| CN109545596B (en) * | 2019-01-10 | 2024-02-27 | 常熟开关制造有限公司(原常熟开关厂） | Operating mechanism of three-position dual-power change-over switch |
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| CN110473723B (en) * | 2019-08-20 | 2024-04-19 | 陕西铭拓机电技术有限公司 | Dual power supply switching mechanism and switch equipment with same |
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| CN111933473B (en) * | 2020-08-21 | 2024-05-03 | 南京亚派科技股份有限公司 | Excitation type double-power-supply contact pressing device |
| CN112531508A (en) * | 2020-11-11 | 2021-03-19 | 贵州电网有限责任公司 | Multifunctional low-voltage comprehensive distribution box capable of switching output capacity and automatically locking |
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Application publication date: 20130501 |