CN220208840U - Star-delta quick switching contactor - Google Patents
Star-delta quick switching contactor Download PDFInfo
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- CN220208840U CN220208840U CN202321788053.5U CN202321788053U CN220208840U CN 220208840 U CN220208840 U CN 220208840U CN 202321788053 U CN202321788053 U CN 202321788053U CN 220208840 U CN220208840 U CN 220208840U
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- 230000007704 transition Effects 0.000 claims 5
- 238000006243 chemical reaction Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 22
- 238000004804 winding Methods 0.000 description 4
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Abstract
The utility model belongs to the technical field of contactors, and particularly relates to a star-delta quick switching contactor, which comprises an electromagnetic mechanism, an insulating connecting rod, a normally open contact mechanism and a normally closed contact mechanism, wherein the insulating connecting rod, the normally open contact mechanism and the normally closed contact mechanism are arranged on the electromagnetic mechanism, the normally open contact mechanism comprises a normally open movable contact piece, a first normally open movable contact, a second normally open movable contact, a first normally open fixed contact and a second normally open fixed contact which are respectively arranged at two ends of the normally open movable contact piece, and the normally closed contact mechanism comprises a normally closed movable contact, a first normally closed movable contact and a second normally closed movable contact which are respectively arranged at two ends of the normally closed movable contact piece, a first normally closed fixed contact arranged above the first normally closed movable contact and a second normally closed fixed contact arranged above the second normally closed movable contact. The utility model can realize the rapid conversion between the star and the triangle and solve the problem of slow current reaction in the conversion process of the contactor.
Description
Technical Field
The utility model relates to the technical field of contactors, in particular to a star-delta quick switching contactor.
Background
The star-delta connection method of the motor is to make star connection of the three-phase winding, so that the phase voltage of the motor winding is reduced to 220V; the three-phase windings are connected in a delta shape, so that the phase voltage of the motor winding is 380V, and full-voltage operation is performed. When the device runs in air, no load is applied, the motor can run in a star connection, the rotating speed is not obviously reduced, and when the device runs in load, the motor needs to be switched to a triangle connection before loading, so that enough torque output is ensured.
In the prior art, star-delta conversion is usually realized by adopting two contactors, and the method needs that after the normally closed point of the suction contactor is closed, the other contactor starts to suction, so that the conversion time is long, and the torque is insufficient after load, so that the vehicle is choked.
It is therefore necessary to provide a new star delta fast switching contactor.
Disclosure of Invention
Based on the above-mentioned problems existing in the prior art, an object of the present utility model is to provide a star-delta fast switching contactor, which can realize fast switching between star-delta, and solve the problem of slow current response in the switching process of the contactor.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a star-delta quick change contactor, includes electromagnetic mechanism, sets up insulating connecting rod, normally open contact mechanism and the normally closed contact mechanism on the electromagnetic mechanism, normally open contact mechanism is including setting up normally open movable contact piece on the insulating connecting rod, set up respectively first normally open movable contact and the second normally open movable contact of normally open movable contact both ends, set up first normally open fixed contact below the first normally open movable contact and set up the second normally open fixed contact below the second normally open movable contact, normally closed contact mechanism is including setting up normally closed movable contact piece on the insulating connecting rod, set up respectively first normally closed movable contact and the second normally closed movable contact of normally closed movable contact both ends, set up first normally closed fixed contact and the second normally closed fixed contact of setting above the second normally closed movable contact of first normally closed movable contact.
Further, the electromagnetic mechanism comprises an iron core, an armature arranged above the iron core, a coil wound on the iron core and a reset spring arranged above the armature.
Further, the coil is wound on a convex column in the center of the iron core, and two ends of the coil are connected with a power supply.
Furthermore, two reset springs are arranged, the upper ends of the two reset springs are fixedly arranged, and the lower ends of the two reset springs are fixedly connected with the armature.
Further, the bottom end of the insulating connecting rod is fixedly connected with the armature.
Further, the normally open movable contact pieces are arranged in three, are respectively and sequentially arranged on the insulating connecting rod and move up and down along with the insulating connecting rod.
Further, the first normally open movable contact and the second normally open movable contact are respectively provided with three, the first normally open stationary contact arranged below the first normally open movable contact is provided with three, and the second normally open stationary contact arranged below the second normally open movable contact is also provided with three.
Further, the connecting ends of the three first normally open static contacts are respectively connected with three U's on one side of the triangle connection of the three-phase motor through wires 1 \V 1 \W 1 The end parts are connected, and the connecting ends of the three second normally open static contacts are respectively connected with three U's on the other side of the triangular connection method of the three-phase motor through wires 2 \V 2 \W 2 The end parts are connected
Further, the normally closed movable contact pieces are arranged in three, are respectively and sequentially arranged on the insulating connecting rod and move up and down along with the insulating connecting rod.
Further, the first normally-closed movable contact and the second normally-closed movable contact are respectively provided with three, the first normally-closed stationary contact arranged below the first normally-closed movable contact is provided with three, and the second normally-closed stationary contact arranged below the second normally-closed movable contact is also provided with three
The beneficial effects of the utility model are as follows: the star-delta quick switching contactor comprises an electromagnetic mechanism, an insulating connecting rod, a normally-open contact mechanism and a normally-closed contact mechanism which are arranged on the electromagnetic mechanism, wherein the normally-open contact mechanism comprises a normally-open movable contact piece arranged on the insulating connecting rod, a first normally-open movable contact and a second normally-open movable contact which are respectively arranged at two ends of the normally-open movable contact piece, a first normally-open fixed contact arranged below the first normally-open movable contact and a second normally-open fixed contact arranged below the second normally-open movable contact, and the normally-closed contact mechanism comprises a normally-closed movable contact arranged on the insulating connecting rod, a first normally-closed movable contact and a second normally-closed movable contact which are respectively arranged at two ends of the normally-closed movable contact piece, a first normally-closed fixed contact arranged above the first normally-closed movable contact and a second normally-closed fixed contact arranged above the second normally-closed movable contact. The utility model can realize the rapid conversion between the star and the triangle and solve the problem of slow current reaction in the conversion process of the contactor.
Drawings
The utility model is further described below with reference to the drawings and examples.
In the figure: fig. 1 is a schematic structural diagram of a star-delta fast switching contactor according to an embodiment of the present utility model.
Fig. 2 is a schematic diagram of a connection method for connecting a three-phase motor by using a star-delta fast switching contactor according to an embodiment of the present utility model.
Wherein, each reference sign in the figure:
star delta fast switching contactor 100;
an electromagnetic mechanism 1, an iron core 11, an armature 12, a coil 13, and a return spring 14;
an insulating connecting rod 2;
a normally open contact mechanism 3, a normally open contact piece 31, a first normally open movable contact 32, a second normally open movable contact 33, a first normally open fixed contact 34, and a second normally open fixed contact 35;
the normally-closed contact mechanism 4, the normally-closed movable contact 41, the first normally-closed movable contact 42, the second normally-closed movable contact 43, the first normally-closed stationary contact 44 and the second normally-closed stationary contact 45.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
It will be understood that when an element is referred to as being "connected to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.
Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment," "in some embodiments," or "in some embodiments" in various places throughout this specification are not all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
As shown in fig. 1, an embodiment of the present utility model provides a star-delta quick change contactor 100 including an electromagnetic mechanism 1, an insulating link 2 provided on the electromagnetic mechanism 1, a normally open contact mechanism 3, and a normally closed contact mechanism 4.
In some of these embodiments, the electromagnetic mechanism 1 is disposed at a bottom end, and the electromagnetic mechanism 1 includes a core 11, an armature 12 disposed above the core 11, a coil 13 wound on the core 11, and a return spring 14 disposed above the armature 12. The iron core 11 is of a side-mounted E-shaped structure and is placed at the bottom. The coil 13 is wound on a convex column in the center of the iron core 11, two ends of the coil 13 are suitable for being connected with a power supply, and a switch is arranged, so that the on-off of current on the coil 13 can be controlled by pressing the switch. The armature 12 is also in a side-mounted E-shaped structure, is matched with the iron core 11, the armature 12 and the iron core 11 are in a symmetrical structure, and the armature 12 is arranged above the iron core 11. The two return springs 14 are provided, and the two return springs 14 are provided on both sides above the armature 12, respectively. The upper ends of the two return springs 14 are fixedly arranged, and the lower ends of the two return springs 14 are fixedly connected with the armature 12. In the original state, the armature 12 is connected by two return springs 14 such that a certain gap is provided between the armature 12 and the core 11, the armature 12 being separated from the core 11. When the coil 13 is connected with a power supply and the switch is closed, current flows through the coil 13, a magnetic field is generated on the coil 13, and the magnetic field attracts the armature 12 against the acting force of the return spring 14 through the iron core 11, so that the armature 12 moves downwards, and the iron core 11 and the armature 12 are attracted. When the switch is turned off, the coil 13 is powered off, so that the iron core 11 is demagnetized, and at the moment, the armature 12 is driven to move upwards under the action of the return spring 14, so that the armature 12 is disconnected from the iron core 11.
In some embodiments, the insulating connecting rod 2 has a cylindrical shape, and the bottom end of the insulating connecting rod 2 is fixedly connected with the armature 12, so that the insulating connecting rod 2 moves up and down along with the movement of the armature 12. That is, when the coil 13 is connected to the power source and the switch is closed, a current flows through the coil 13, and a magnetic field is generated on the coil 13, and the magnetic field attracts the armature 12 against the force of the return spring 14 through the core 11, so that the armature 12 moves downward, and the core 11 and the armature 12 are attracted, and the insulating connecting rod 2 moves downward along with the armature 12. When the switch is turned off, the coil 13 is powered off, so that the iron core 11 is demagnetized, at the moment, the armature 12 is driven to move upwards under the action of the return spring 14, so that the armature 12 is disconnected from the iron core 11, and at the moment, the insulating connecting rod 2 moves upwards along with the armature 12.
In some of these embodiments, the normally open contact mechanism 3 includes a normally open movable contact 31 provided on the insulating link 2, a first normally open movable contact 32 and a second normally open movable contact 33 provided at both ends of the normally open movable contact 31, respectively, a first normally open fixed contact 34 provided below the first normally open movable contact 32, and a second normally open fixed contact 35 provided below the second normally open movable contact 33. The number of the normally operated contact pieces 31 is three, and the three contact pieces are respectively and sequentially arranged on the insulating connecting rod 2 and move up and down along with the insulating connecting rod 2. Since the normally-open contact 31 is provided with three, the first normally-open contacts 32 provided at both ends of the normally-open contact 31 are provided with three, and the second normally-open contact 22 is provided with three. The first normally open fixed contacts 34 provided below the first normally open movable contacts 32 are provided in three, and the second normally open fixed contacts 35 provided below the second normally open movable contacts 33 are also provided in three. As shown in fig. 2, the connection ends of the three first normally open fixed contacts 34 are connected with three U's on one side of the three-phase motor by wires respectively 1 \V 1 \W 1 The end parts are connected. Three U's at the other side of the triangle connection method of the connection ends of the three second normally open static contacts 35 and the three phase motor through wires respectively 2 \V 2 \W 2 The end parts are connected.
In some of the embodiments, the normally-closed contact mechanism 4 comprises a normally-closed movable contact 41 arranged on the insulating connecting rod 2, a first normally-closed movable contact 42 and a second normally-closed movable contact 42 respectively arranged at two ends of the normally-closed movable contact 41A normally-closed movable contact 43, a first normally-closed stationary contact 44 provided above the first normally-closed movable contact 42, and a second normally-closed stationary contact 45 provided above the second normally-closed movable contact 43. The normally closed movable contact 41 is provided with three pieces, which are respectively and sequentially arranged on the insulating connecting rod 2 and move up and down along with the insulating connecting rod 2. Since the normally-closed movable contact 41 is provided with three, the first normally-closed movable contacts 42 provided at both ends of the normally-closed movable contact 41 are provided with three, and the second normally-closed movable contacts 42 are provided with three. The first normally-closed stationary contact 44 provided above the first normally-closed movable contact 42 is provided in three, and the second normally-closed stationary contact 45 provided above the second normally-closed movable contact 43 is also provided in three. As shown in fig. 2, the connection ends of the three first normally closed stationary contacts 34 are connected to three U's on one side of the star connection of the three-phase motor by wires, respectively 3 \V 3 \W 3 The end parts are connected. The connecting ends of the three second normally closed static contacts 35 are respectively connected with three U's on the other side of the star connection of the three-phase motor through wires 4 \V 4 \W 4 The end parts are connected.
In some embodiments, a stroke of 0.5mm is arranged between the fixed contact and the movable contact in the normally open contact mechanism 3 of the star-delta quick change contactor 100 from closing to opening, and a stroke of 4mm is arranged in the middle of the stroke and is not in contact with the movable contact and the fixed contact, so that short circuit can be prevented. In the normally closed contact mechanism 4, a stroke of 0.5mm is provided between the stationary contact and the movable contact from closing to opening.
When the star-delta quick switching contactor 100 is used, the normally open contact mechanism 3 of the contactor is firstly connected into the delta connection method of the three-phase motor, and the normally closed contact mechanism 4 is connected into the star connection method of the three-phase motor. That is, the connection of the normally open contact mechanism 3 is three U's on one side of the triangle connection of the connection ends of the three first normally open fixed contacts 34 and the three phase motor respectively through wires 1 \V 1 \W 1 The end parts are connected; three U's at the other side of the triangle connection method of the connection ends of the three second normally open static contacts 35 and the three phase motor through wires respectively 2 \V 2 \W 2 The end parts are connected. The connection method of the normally closed contact mechanism 4 is that the connection ends of the three first normally closed static contacts 34 are respectively connected with the three phases by leadsThree U's on one side of a star connection of an electric machine 3 \V 3 \W 3 The end parts are connected; the connecting ends of the three second normally closed static contacts 35 are respectively connected with three U's on the other side of the star connection of the three-phase motor through wires 4 \V 4 \W 4 The end parts are connected. When the coil 13 is connected with a power supply and the switch is closed, current passes through the coil 13, a magnetic field is generated on the coil 13, the magnetic field attracts the armature 12 to overcome the acting force of the return spring 14 through the iron core 11, the armature 12 moves downwards, so that the iron core 11 and the armature 12 are attracted, the insulating connecting rod 2 moves downwards along with the armature 12, the normally-open contact piece 31 and the normally-closed contact piece 41 are driven to move downwards, and the first normally-open movable contact 32 and the second normally-open movable contact 33 at two ends of the normally-open contact piece 3 are attracted with the second normally-open fixed contact 35 of the first normally-open fixed contact 34; the first and second normally-closed movable contacts 42 and 43 at both ends of the normally-closed contact 41 are disconnected from the first and second normally-closed stationary contacts 44 and 45, that is, the delta connection of the three-phase motor is connected, so that sufficient torque output can be ensured, and at this time, the star connection of the three-phase motor is disconnected. When the switch is opened, the coil 13 is powered off, so that the iron core 11 is demagnetized, at the moment, the armature 12 is driven to move upwards under the action of the reset spring 14, so that the armature 12 is disconnected from the iron core 11, at the moment, the insulating connecting rod 2 moves upwards along with the armature 12, so that the normally-open contact piece 31 and the normally-closed contact piece 41 are driven to move upwards, at the moment, the first normally-open movable contact 32 and the second normally-open movable contact 33 at the two ends of the normally-open movable contact piece 3 are disconnected with the second normally-open movable contact 35 of the first normally-open movable contact 34; the first and second normally-closed movable contacts 42 and 43 at both ends of the normally-closed contact 41 are engaged with the first and second normally-closed stationary contacts 44 and 45, that is, the delta connection of the three-phase motor is disconnected, and at this time, the star connection of the three-phase motor is engaged. The star-delta quick switching contactor 100 of the utility model realizes quick switching between star-delta by connecting the star connection method and the triangle connection method of the three-phase motor into the same contactor, solves the problem of slow current reaction in the switching process of the contactor, and reduces the production cost.
The foregoing description of the preferred embodiment of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.
Claims (10)
1. The utility model provides a star-delta quick change contactor, its characterized in that includes electromagnetic mechanism, sets up insulating connecting rod, normally open contact mechanism and normally closed contact mechanism on the electromagnetic mechanism, normally open contact mechanism is including setting up normally open movable contact piece on the insulating connecting rod, set up respectively first normally open movable contact and the second normally open movable contact of normally open movable contact both ends, set up first normally open fixed contact below the first normally open movable contact and set up the second normally open fixed contact below the second normally open movable contact, normally closed contact mechanism is including setting up normally closed movable contact on the insulating connecting rod, set up respectively first normally closed movable contact and the second normally closed movable contact of normally closed movable contact both ends, set up first normally closed fixed contact and the second normally closed fixed contact of setting above the second normally closed movable contact of first normally closed movable contact.
2. The star-delta quick transition contactor of claim 1, wherein said electromagnetic mechanism comprises a core, an armature disposed above said core, a coil wound on said core, and a return spring disposed above said armature.
3. The star-delta quick transition contactor of claim 2, wherein said coil is wound around a boss in the center of said core, and both ends of said coil are connected to a power source.
4. The star-delta quick change-over contactor as set forth in claim 2, wherein said two return springs are fixedly mounted at their upper ends, and wherein said two return springs are fixedly connected at their lower ends to said armature.
5. The star-delta quick transition contactor of claim 2, wherein a bottom end of said insulated link is fixedly connected to said armature.
6. The star-delta quick switching contactor of claim 1, wherein three normally open movable contacts are provided, each of which is sequentially provided on the insulating connecting rod and moves up and down with the insulating connecting rod.
7. The star delta quick transition contactor of claim 6, wherein said first and second normally open movable contacts are provided with three, respectively, said first normally open stationary contact disposed below said first normally open movable contact is provided with three, and said second normally open stationary contact disposed below said second normally open movable contact is also provided with three.
8. The star-delta quick change-over contactor as set forth in claim 7, wherein the connection ends of three said first normally open stationary contacts are connected to three U's on one side of a delta connection of a three-phase motor by wires, respectively 1 \V 1 \W 1 The end parts are connected, and the connecting ends of the three second normally open static contacts are respectively connected with three U's on the other side of the triangular connection method of the three-phase motor through wires 2 \V 2 \W 2 The end parts are connected.
9. The star-delta quick switching contactor of claim 1, wherein three normally closed movable contacts are provided, each of which is sequentially provided on the insulating connecting rod to move up and down with the insulating connecting rod.
10. The star delta quick transition contactor of claim 9, wherein said first and second normally closed movable contacts are provided with three, respectively, said first normally closed stationary contact provided under said first normally closed movable contact is provided with three, and said second normally closed stationary contact provided under said second normally closed movable contact is also provided with three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321788053.5U CN220208840U (en) | 2023-07-07 | 2023-07-07 | Star-delta quick switching contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321788053.5U CN220208840U (en) | 2023-07-07 | 2023-07-07 | Star-delta quick switching contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220208840U true CN220208840U (en) | 2023-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321788053.5U Active CN220208840U (en) | 2023-07-07 | 2023-07-07 | Star-delta quick switching contactor |
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| Country | Link |
|---|---|
| CN (1) | CN220208840U (en) |
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2023
- 2023-07-07 CN CN202321788053.5U patent/CN220208840U/en active Active
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