CN111508771A - Magnetic control shape memory alloy AC contactor - Google Patents
Magnetic control shape memory alloy AC contactor Download PDFInfo
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- CN111508771A CN111508771A CN202010409854.0A CN202010409854A CN111508771A CN 111508771 A CN111508771 A CN 111508771A CN 202010409854 A CN202010409854 A CN 202010409854A CN 111508771 A CN111508771 A CN 111508771A
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- shape memory
- memory alloy
- static contact
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
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Abstract
The invention discloses a magnetic control shape memory alloy alternating current contactor, which comprises a shell, wherein the shell comprises a static contact system shell, a mechanical operation system shell, a base and a base fixing screw, the top of the shell is provided with a static contact system, meanwhile, the static contact system comprises a static contact, a copper guide vane and a static contact micro-reset spring, and the bottom of the static contact system is provided with a moving contact system. The invention realizes the on-off control of the circuit by utilizing the rapid deformation characteristic of the magnetic control shape memory alloy material, can realize the response speed of tens of microseconds, effectively shortens the switching action time of the alternating current contactor, can accurately control the displacement of the moving contact system, is matched with the static contact micro-reset spring in the static contact system, can effectively eliminate mechanical vibration, reduces electric arc and attraction electric loss, has no electric energy consumption in the circuit breaking state, and can quickly realize breaking operation when permanent faults occur, thereby ensuring the continuous breaking of the circuit.
Description
Technical Field
The invention relates to the technical field of alternating current contactors, in particular to a magnetic control shape memory alloy alternating current contactor.
Background
The AC contactor is a switch device capable of realizing on-off of circuit, it controls the main loop of heavy current through the secondary loop, it is widely used in the power distribution and start-stop control of the equipment, the traditional AC contactor is electromagnetic, its mechanical operating mechanism is composed of driving coil, iron core and connecting rod, the attraction and disconnection of the moving contact and the static contact are realized by the electromagnetic force generated by the coil on-off, the mechanical tremble and the current lag effect can appear when attracting because of the arc ablation, the electric life of the electromagnetic AC contactor is far shorter than the mechanical life, and the switch response time is longer, the energy consumption is high, the response is slow, the service life is low, the reliability is poor, etc. has become the main defects of the electromagnetic contactor.
At present, the improved ac contactor mainly includes three types: the permanent-magnet alternating-current contactor adopts a permanent-magnet operating mechanism, namely a driving device consisting of a permanent magnet and a microelectronic module is utilized to replace the traditional electromagnetic driving device, and the permanent-magnet alternating-current contactor has the advantages of no vibration in actuation and no holding current, but has the defect that after frequent working and impact, the permanent magnet is easy to break, so that the magnetic force is reduced, the actuation fails, and the reliability is poor; the solid-state relay is a non-contact switch composed of power electronic power devices, has the advantages of no electric arc, long service life, high response speed and the like, but has large on-state resistance and poor overload resistance, and is difficult to apply to medium and high power occasions; the hybrid AC contactor adopts a composite structure of electromagnetic type and power electronic switch, realizes the breaking of a main circuit by using a power switch, realizes the circuit maintenance by using a mechanical switch, has the advantages of no electric arc, high switching speed, small on-state loss and the like, but has a complex structure and low reliability, and therefore, the magnetic control shape memory alloy AC contactor is provided.
Disclosure of Invention
The present invention is directed to a magnetic shape memory alloy ac contactor to solve the above problems of the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a magnetic control shape memory alloy alternating current contactor comprises a shell, wherein the shell comprises a static contact system shell, a mechanical operating system shell, a base and base fixing screws, a static contact system is arranged at the top of the shell, meanwhile, the static contact system comprises a static contact, a copper guide vane and a static contact micro-reset spring, a moving contact system is arranged at the bottom of the static contact system and comprises a moving contact, a moving contact support frame and a moving contact fixing screw, a wiring assembly is arranged at the back of the static contact system and comprises a main circuit wiring gasket and a main circuit wiring bolt, the inner cavity of the shell is provided with a magnetic control shape memory alloy mechanical operating system, the magnetic control shape memory alloy mechanical operating system comprises a magnetic control shape memory alloy rod, a connecting column, a coil framework and a driving coil, the inner cavity of the shell and the right side of the magnetic control shape memory alloy mechanical operating system are provided with a wiring, and the wiring mechanism comprises a control lead, a wiring base and a wiring base bolt.
Preferably, the mechanical operating system housing is arranged at the bottom of the static contact system housing through a base fixing screw, and the base is arranged at the bottom of the mechanical operating system housing.
Preferably, the number of the static contacts is six, the six static contacts are arranged in an equidistant and symmetrical mode, meanwhile, the static contacts are fixedly connected with the copper flow deflector, and the copper flow deflector is fixedly connected with the static contact micro-reset spring.
Preferably, the number of the movable contacts is six, the six movable contacts are arranged in an equidistant and symmetrical mode, and the movable contacts are fixedly connected with the movable contact support frame through movable contact fixing screws.
Preferably, the number of the main circuit wiring gaskets is six, the six main circuit wiring gaskets are arranged symmetrically at equal intervals, and meanwhile, the main circuit wiring gaskets are fixedly connected with the top of the static contact system shell through main circuit wiring bolts.
Preferably, the connecting column is connected to the top of the magnetic control shape memory alloy rod in a threaded mode, the outer surface of the magnetic control shape memory alloy rod is sleeved with the coil framework, and the outer surface of the coil framework is provided with the driving coil.
Preferably, the number of the control leads is four, the four control leads are arranged in a square structure, and meanwhile, the control leads are fixedly connected with the wiring base through wiring base bolts.
Compared with the prior art, the invention has the following beneficial effects:
the invention realizes the on-off control of the circuit by utilizing the rapid deformation characteristic of the magnetic control shape memory alloy material, can realize the response speed of tens of microseconds, effectively shortens the switching action time of the alternating current contactor, can accurately control the displacement of the moving contact system, is matched with the static contact micro-reset spring in the static contact system, can effectively eliminate mechanical vibration, reduces electric arc and attraction electric loss, has no electric energy consumption in the circuit breaking state, and can quickly realize breaking operation when permanent faults occur, thereby ensuring the continuous breaking of the circuit.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic perspective view of another embodiment of the present invention;
FIG. 3 is a first schematic diagram of the operation of the magnetic shape memory alloy (Ni-Mn-Ga) according to the present invention;
FIG. 4 is a second schematic diagram of the operation of the magnetic shape memory alloy (Ni-Mn-Ga) according to the present invention;
FIG. 5 is a third schematic diagram of the operation of the magnetic shape memory alloy (Ni-Mn-Ga) according to the present invention;
FIG. 6 is a schematic view of a magnetic control shape memory alloy mechanical operating system according to the present invention;
fig. 7 is a schematic view of a movable contact system of the present invention;
FIG. 8 is a schematic diagram of the operation of the drive contact system of the mechanical actuator of the present invention;
FIG. 9 is a schematic view of the wiring assembly of the present invention;
FIG. 10 is a schematic view of the wiring mechanism of the present invention.
In the figure: the device comprises a shell 1, a fixed contact system shell 11, a mechanical operating system shell 12, a base 13, a base 14, fixing screws, a fixed contact system 2, a fixed contact 21, a copper deflector 22, a fixed contact micro-reset spring 23, a movable contact system 3, a movable contact 31, a movable contact support frame 32, a movable contact fixing screw 33, a magnetic control shape memory alloy mechanical operating system 4, a magnetic control shape memory alloy rod 41, a connecting column 42, a coil framework 43, a driving coil 44, a wiring assembly 5, a main circuit wiring gasket 51, a main circuit wiring bolt 52, a wiring mechanism 6, a control lead 61, a wiring base 62 and a wiring base bolt 63.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The housing 1, the static contact system housing 11, the mechanical operating system housing 12, the base 13, the base fixing screw 14, the static contact system 2, the static contact 21, the copper deflector 22, the static contact micro-reset spring 23, the moving contact system 3, the moving contact 31, the moving contact support frame 32, the moving contact fixing screw 33, the magnetic control shape memory alloy mechanical operating system 4, the magnetic control shape memory alloy rod 41, the connecting column 42, the coil framework 43, the driving coil 44, the wiring component 5, the main circuit wiring gasket 51, the main circuit wiring bolt 52, the wiring mechanism 6, the control lead 61, the wiring base 62 and the wiring base bolt 63 of the present application are all general standard components or components known by those skilled in the art, and the structure and principle of the present application are known by those skilled in the art or known by conventional experimental methods.
Referring to fig. 1-10, a magnetic control shape memory alloy ac contactor includes a housing 1, the housing 1 includes a static contact system casing 11, a mechanical operating system casing 12, a base 13 and base fixing screws 14, the mechanical operating system casing 12 is disposed at the bottom of the static contact system casing 11 through the base fixing screws 14, the base 13 is disposed at the bottom of the mechanical operating system casing 12, a driving circuit wiring assembly is further fixedly connected to the outer side of the mechanical operating system casing 12, the driving circuit wiring assembly includes a driving circuit lead, a driving circuit wiring base and a driving circuit wiring bolt, meanwhile, the driving circuit is controlled by a step current signal, a static contact system 2 is disposed at the top of the housing 1, meanwhile, the static contact system 2 includes a static contact 21, a copper deflector 22 and a static contact micro-reset spring 23, the number of the static contact 21 is six, the six static contacts 21 are arranged equidistantly and symmetrically, the six static contacts 21 are divided into three groups, each group of two static contact systems 2 (respectively used as incoming lines and outgoing lines of three-phase voltages Ua, Ub and Uc), meanwhile, the static contacts 21 are fixedly connected with copper deflectors 22, the copper deflectors 22 are fixedly connected with static contact micro-reset springs 23, the functions of the copper micro-reset springs are that the static contacts 21 after micro-displacement are reset, and the positions of the static contacts 21 are locked, the bottom of the static contact system 2 is provided with movable contact systems 3, the movable contact systems 3 comprise movable contacts 31, movable contact support frames 32 and movable contact fixing screws 33, the number of the movable contacts 31 is six, the six movable contacts 31 are equidistantly and symmetrically arranged (the distance is 3-6 mm), the movable contacts 31 are fixedly connected with the movable contact support frames 32 through the movable contact fixing screws 33, the back of the static contact system 2 is provided with a wiring component 5, the wiring assembly 5 comprises main circuit wiring gaskets 51 and main circuit wiring bolts 52, the number of the main circuit wiring gaskets 51 is six, the six main circuit wiring gaskets 51 are arranged equidistantly and symmetrically, meanwhile, the main circuit wiring gaskets 51 are fixedly connected with the top of the static contact system shell 11 through the main circuit wiring bolts 52, the inner cavity of the shell 1 is provided with the magnetic control shape memory alloy mechanical operating system 4, the magnetic control shape memory alloy mechanical operating system 4 comprises a magnetic control shape memory alloy rod 41, a connecting column 42, a coil framework 43 and a driving coil 44, the connecting column 42 is in threaded connection with the top of the magnetic control shape memory alloy rod 41, the outer surface of the magnetic control shape memory alloy rod 41 is sleeved with the coil framework 43, the outer surface of the coil framework 43 is provided with the driving coil 44, the magnetic control shape memory alloy rod 41 is made of Ni-Mn-Ga alloy, the alloy has a shape memory effect, the deformation coefficient of the alloy can reach 10% under the action of a magnetic field, the wiring mechanism 6 is arranged in the inner cavity of the shell 1 and on the right side of the magnetic control shape memory alloy mechanical operating system 4, the wiring mechanism 6 comprises control leads 61, wiring bases 62 and wiring base bolts 63, the number of the control leads 61 is four, the four control leads 61 are arranged in a square structure, and meanwhile, the control leads 61 are fixedly connected with the wiring bases 62 through the wiring base bolts 63.
When in use, the on-off of the circuit is controlled by utilizing the magnetic control shape memory effect of the magnetic control shape memory alloy material, when the driving coil 44 is electrified to control current, under the action of a magnetic field, the magnetic control shape memory alloy rod 41 extends to push the moving contact system 3 and the static contact system 2 to be closed, when the driving current is zero, the moving contact system 3 and the static contact system 2 realize breaking, when the moving contact system 3 moves to the contact surface position of the static contact system 2, the magnetic control shape memory alloy rod 41 can continuously push the moving contact 31 to move upwards for a distance of about 10 mu m to ensure that the moving contact 31 is completely contacted with the static contact 21, when breaking, the static contact micro-reset spring 23 ensures that the static contact 21 returns to the original position (because the actual action of the static contact 21 is very tiny, still called as 'static contact 21' according to the customary naming mode of the traditional mechanical contactor and is distinguished, in fig. 3, two martensitic variants exist in the magnetically controlled shape memory alloy, which have different magnetic domain structures and are separated by a twin crystal boundary, under the action of an external magnetic field, the alloy can generate magnetically induced martensitic variant twin crystal orientation displacement, so that a dimensional change is generated, the maximum deformation rate of the alloy can reach 9.4%, and the response time is microsecond, the magnetically controlled shape memory alloy is a currently known functional material with the highest deformation rate, in fig. 4, the magnetically controlled shape memory alloy can be equivalent to two martensitic variant one and a martensitic variant two, which have different magnetic crystal orientations, when an external magnetic field H =0, the internal magnetic domain of the alloy is in a disordered orientation, and the size of the alloy cannot change, as shown in fig. 5, when the external magnetic field H >0, the volume of the martensitic variant two is increased along the direction of the magnetic field, the volume of the martensitic variant one is decreased, so that the twin crystal boundary moves, so that the material deforms, and when the movable contact 31 and the stationary contact 21 are in a separated state, when the excitation magnetic field H =0, the distance between the fixed contact 21 and the movable contact 31 is H, when the excitation magnetic field H >0, the magnetic control shape memory alloy rod 41 extends to push the movable contact 31, in order to ensure that the movable contact 31 and the fixed contact 21 are completely contacted, it is generally required to ensure that the extension distance of the magnetic control shape memory alloy rod 41 is hs, which is slightly larger than the original distance H between the movable contact 31 and the fixed contact 21, at this time, the fixed contact 21 also moves by a small displacement Δ H, and hs = H + Δ H, that is, the moving distance of the magnetic control shape memory alloy rod 41 is equal to the sum of the static distance H between the movable contact 31 and the fixed contact 21 and the displacement Δ H of the fixed contact 21, when the fixed contact 21 is slightly displaced upwards, the magnetic control micro-reset spring 23 is also compressed, it is emphasized that, because of the precision driving characteristic of the magnetic control shape memory alloy rod 41, the displacement Δ H of the fixed contact 21 is usually only tens, by adopting the contact mode, the contact impact force and mechanical vibration during the traditional mechanical closing can be effectively reduced, when the mechanical operating system is released, the magnetic control shape memory alloy rod 41 contracts to the original size to drive the movable contact 31 to recover the original position, and the static contact 21 also recovers to the original position under the action of the static contact micro-reset spring 23, which is a complete closing-releasing process.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A magnetic control shape memory alloy AC contactor comprises a shell (1), and is characterized in that: the shell (1) comprises a static contact system shell (11), a mechanical operating system shell (12), a base (13) and base fixing screws (14), a static contact system (2) is arranged at the top of the shell (1), meanwhile, the static contact system (2) comprises a static contact (21), a copper guide vane (22) and a static contact micro-reset spring (23), a moving contact system (3) is arranged at the bottom of the static contact system (2), the moving contact system (3) comprises a moving contact (31), a moving contact support frame (32) and moving contact fixing screws (33), a wiring assembly (5) is arranged on the back of the static contact system (2), the wiring assembly (5) comprises a main circuit wiring gasket (51) and a main circuit wiring bolt (52), and a magnetic control shape memory alloy mechanical operating system (4) is arranged in an inner cavity of the shell (1), and the magnetic control shape memory alloy mechanical operating system (4) comprises a magnetic control shape memory alloy rod (41), a connecting column (42), a coil framework (43) and a driving coil (44), a wiring mechanism (6) is arranged in the inner cavity of the shell (1) and positioned on the right side of the magnetic control shape memory alloy mechanical operating system (4), and the wiring mechanism (6) comprises a control lead (61), a wiring base (62) and a wiring base bolt (63).
2. The magnetically controlled shape memory alloy ac contactor of claim 1, wherein: the mechanical operating system shell (12) is arranged at the bottom of the static contact system shell (11) through a base fixing screw (14), and the base (13) is arranged at the bottom of the mechanical operating system shell (12).
3. The magnetically controlled shape memory alloy ac contactor of claim 1, wherein: the number of the static contacts (21) is six, the six static contacts (21) are symmetrically arranged at equal intervals, meanwhile, the static contacts (21) are fixedly connected with the copper flow deflector (22), and the copper flow deflector (22) is fixedly connected with the static contact micro-reset spring (23).
4. The magnetically controlled shape memory alloy ac contactor of claim 1, wherein: the number of the movable contacts (31) is six, the six movable contacts (31) are arranged in an equidistant and symmetrical mode, and the movable contacts (31) are fixedly connected with a movable contact support frame (32) through movable contact fixing screws (33).
5. The magnetically controlled shape memory alloy ac contactor of claim 1, wherein: the number of the main circuit wiring gaskets (51) is six, the six main circuit wiring gaskets (51) are arranged symmetrically at equal intervals, and meanwhile, the main circuit wiring gaskets (51) are fixedly connected with the top of the static contact system shell (11) through main circuit wiring bolts (52).
6. The magnetically controlled shape memory alloy ac contactor of claim 1, wherein: the connecting column (42) is in threaded connection with the top of the magnetic control shape memory alloy rod (41), the outer surface of the magnetic control shape memory alloy rod (41) is sleeved with a coil framework (43), and a driving coil (44) is arranged on the outer surface of the coil framework (43).
7. The magnetically controlled shape memory alloy ac contactor of claim 1, wherein: the quantity of control lead wire (61) is four, and is square structure setting between four control lead wire (61), and simultaneously, control lead wire (61) pass through wiring base bolt (63) and wiring base (62) fixed connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010409854.0A CN111508771A (en) | 2020-05-15 | 2020-05-15 | Magnetic control shape memory alloy AC contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010409854.0A CN111508771A (en) | 2020-05-15 | 2020-05-15 | Magnetic control shape memory alloy AC contactor |
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| Publication Number | Publication Date |
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| CN111508771A true CN111508771A (en) | 2020-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010409854.0A Pending CN111508771A (en) | 2020-05-15 | 2020-05-15 | Magnetic control shape memory alloy AC contactor |
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| CN (1) | CN111508771A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023213934A1 (en) * | 2022-05-06 | 2023-11-09 | Eto Magnetic Gmbh | Hybrid circuit breaker device, hybrid protection device and method |
-
2020
- 2020-05-15 CN CN202010409854.0A patent/CN111508771A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023213934A1 (en) * | 2022-05-06 | 2023-11-09 | Eto Magnetic Gmbh | Hybrid circuit breaker device, hybrid protection device and method |
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