Three-phase motor wiring converter

Abstract

The utility model discloses a three-phase motor wiring converter in the technical field of motors, comprising a three-phase motor and a junction box assembly, the junction box assembly is arranged on the three-phase motor, and the junction box assembly comprises a box body. According to the utility model, when the sliding block is not pushed, the spring pushes the star connection plate, so that the star connection plate is in contact with the three binding posts of the second binding post group, and the first binding post group and the second binding post group are connected in a star connection manner; a plurality of corner joint plates on the sliding block are in contact with the first binding post set and the second binding post set, and three binding posts of the first binding post set and three binding posts of the second binding post set are connected in a triangular mode to form corner joint. The first binding post group and the second binding post group are switched between a star connection mode and an angle connection mode, and quick connection in a required connection mode is achieved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically a three-phase motor wiring converter. Background Technology

[0002] A three-phase motor is a type of motor in which, when three-phase alternating current is applied to the three-phase stator windings (each phase differing by 120 electrical degrees), a rotating magnetic field is generated. This rotating magnetic field cuts the rotor windings, thereby inducing a current in the rotor windings. The current-carrying rotor conductors generate an electromagnetic force under the action of the stator rotating magnetic field, thus forming an electromagnetic torque on the motor shaft, driving the motor to rotate. When a three-phase motor is connected to three-phase power, depending on the application scenario, the terminals of the three-phase motor need to be connected to the external three-phase power supply in either a star connection (star connection) or a delta connection (delta connection). Among them, the star connection has a smaller starting current and lower torque, which is suitable for the starting of small-power, high-torque motors or large-power motors to reduce machine losses. The delta connection has a larger starting current and higher torque, which is suitable for applications requiring high starting torque.

[0003] However, existing three-phase motor star and delta connections are achieved by connecting the two sets of terminals of the three-phase motor through connecting plates. Different connection methods of the connecting plates are used to achieve star and delta connections of the three-phase motor. The connection method of ordinary connecting plates is cumbersome to operate and may lead to wiring errors due to misoperation, which may burn out the motor. It is inconvenient to operate and has poor performance. Based on this, this utility model designs a three-phase motor wiring converter to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a three-phase motor wiring converter to solve the problems of the above-mentioned ordinary connecting plate connection method being cumbersome to operate, and the possibility of incorrect wiring and motor burnout due to misoperation, which is inconvenient to operate.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A three-phase motor wiring converter includes a three-phase motor and a junction box assembly. The junction box assembly is disposed on the three-phase motor and includes a housing. A first terminal group and a second terminal group are fixedly connected inside the housing. Each of the first and second terminal groups includes three terminals. The first and second terminal groups are electrically connected to the three-phase motor. A conversion component is disposed inside the housing for converting between a star connection and a delta connection between the three terminals in the first and second terminal groups.

[0007] As a further embodiment of this utility model: the conversion component includes a sliding block, a sliding rail is connected to the inner bottom of the housing, a sliding block is slidably connected to the sliding block, and a plurality of corner plates perpendicular to its long side are fixedly connected to the sliding block. The corner plates are used for the triangular connection of the first terminal group and the second terminal group. A plurality of push posts are connected to the inner bottom of the housing, and a star plate parallel to its long side is attached to the sliding block. The star plate is used for the star connection of the first terminal group and the second terminal group. A limit port is provided on the sliding block, and one end of the star plate is movably engaged in the limit port. The limit port is used to drive the star plate and allow the star plate to move freely perpendicular to the sliding block. A plurality of springs are provided between the sliding block and the star plate. A plurality of inclined push grooves are opened on the star plate, and the push posts are engaged in the push grooves. A locking groove is provided at one end of the push groove, and the locking groove is used to engage the push posts.

[0008] As a further embodiment of this utility model: both the star connector plate and the corner connector plate are provided with contact grooves, and the contact grooves are matched with the first terminal block group and the second terminal block group.

[0009] As a further embodiment of this invention, a push rod is fixedly connected to the upper part of the sliding block.

[0010] As a further embodiment of this utility model: the upper ends of the three terminals of the first terminal block group are all connected to studs, and the studs are threaded with nuts.

[0011] As a further embodiment of this utility model: a wiring groove is provided on one side of the box body, and the cross-section of the wiring groove is U-shaped.

[0012] As a further embodiment of this utility model: a cover plate is bolted to the upper end of the box body, a groove is provided on the cover plate, and the push rod is disposed in the groove of the cover plate.

[0013] As a further embodiment of this utility model: a fixing plate is fixedly connected to the upper end of the cover plate, the fixing plate is disposed on both sides of the groove of the cover plate, and a push rod is passed through the fixing plate and the fixing rod is used to limit the push rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In this utility model, when the sliding block is not pushed, the spring pushes the star plate so that the star plate contacts the three terminals of the second terminal group, forming a star connection between the first and second terminal groups. When a corner connection is required, the sliding block is pushed to move on the sliding rail, allowing multiple corner plates on the sliding block to contact the first and second terminal groups, forming a delta connection between the three terminals of the first and second terminal groups. By pushing the sliding block, the star and corner connection modes between the first and second terminal groups can be switched, achieving a quick connection of the required mode. This eliminates the need for traditional multiple connecting pieces for terminal installation and connection, resulting in better performance.

[0016] 2. In this utility model, a fixing plate is fixedly connected to the upper end of the cover plate. The fixing plate is set on both sides of the groove of the cover plate. A push rod is passed through the fixing plate and the fixing rod is connected to the fixing rod. The fixing rod is used to limit the push rod. The fixing rod is connected through the holes opened on the fixing plate and the push rod. The fixing rod is fixed by a locking pin when the push rod moves to different positions, so as to avoid the user's misoperation, which may lead to a change in the connection method or a short circuit that burns out the three-phase motor. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the exploded connection structure of the junction box of this utility model;

[0020] Figure 4 This is a schematic diagram of the connection structure of the first wiring group of this utility model;

[0021] Figure 5 This is an exploded structural diagram of the first wiring group of this utility model.

[0022] In the diagram: 1. Three-phase motor; 2. Junction box assembly; 201. Box body; 202. Cover plate; 203. First terminal block group; 204. Second terminal block group; 205. Sliding rail; 206. Sliding block; 207. Push rod; 208. Push column; 209. Star plate; 210. Push groove; 211. Spring; 212. Corner plate; 213. Fixing plate; 214. Fixing rod; 215. Wiring groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example

[0025] Please see Figures 1-5 In this embodiment of the present invention, a three-phase motor wiring converter includes a three-phase motor 1 and a junction box assembly 2. The junction box assembly 2 is disposed on the three-phase motor 1 and includes a box body 201. A first terminal block group 203 and a second terminal block group 204 are fixedly connected inside the box body 201. Both the first terminal block group 203 and the second terminal block group 204 include three terminals. The first terminal block group 203 and the second terminal block group 204 are electrically connected to the three-phase motor 1. A conversion component is disposed inside the box body 201. The conversion component is used to convert between a star connection and a delta connection between the three terminals in the first terminal block group 203 and the second terminal block group 204.

[0026] Specifically, a junction box assembly 2 is provided at the upper end of the three-phase motor 1. The first terminal group 203 and the second terminal group 204 inside the box body 201 are electrically connected to the three-phase motor 1. The three terminals in the first terminal group 203 are connected to the external three-phase wires. The conversion assembly converts the star connection and delta connection between the three terminals in the first terminal group 203 and the second terminal group 204, thereby realizing the conversion between the star connection mode and the delta connection mode of the three-phase motor 1.

[0027] Preferred, such as Figures 2-5As shown, the conversion assembly includes a sliding block 206. A sliding rail 205 is connected to the bottom of the inner part of the housing 201. The sliding block 206 is slidably connected to the sliding block 206. Multiple corner plates 212 perpendicular to its long side are fixedly connected to the sliding block 206. The corner plates 212 are used for the triangular connection of the first terminal group 203 and the second terminal group 204. Several push posts 208 are connected to the bottom of the inner part of the housing 201. A star plate 209 parallel to its long side is attached to the sliding block 206. The star plate 209 is used for the connection of the first terminal group 203. The second terminal block 204 is connected in a star configuration; a limit port is provided on the sliding block 206, and one end of the star plate 209 is movably engaged in the limit port. The limit port is used to drive the star plate 209 and allow the star plate 209 to move freely perpendicular to the sliding block 206. Several springs 211 are provided between the sliding block 206 and the star plate 209; several inclined push grooves 210 are provided on the star plate 209, and the push column 208 is engaged in the push groove 210. A locking groove is provided at one end of the push groove 210, and the locking groove is used to engage the push column 208. A sliding rail 205 is connected inside the housing 201. A sliding limit block 206 slides on the sliding rail 205. The sliding block 206 moves along the arrangement direction of the first terminal group 203 and the second terminal group 204. When the sliding block 206 is not pushed, the spring 211 pushes the star plate 209 so that the star plate 209 contacts the three terminals of the second terminal group 204. The star plate 209 short-circuits the three terminals of the second terminal group 204, forming a star connection between the first terminal group 203 and the second terminal group 204. When a corner connection is required, the sliding block 206 is pushed to move on the sliding rail 205. At this time, the fixed push post 208 is engaged in the inclined push groove 210. The push post 208 drives the star plate 209 to move laterally, allowing the star plate 209 to move laterally. 09 separates from the three terminals of the second terminal block group 204, while continuing to push laterally. The fixed push post 208 is engaged in the locking groove of the push groove 210, limiting the sliding block 206 and the star plate 209. At the same time, the multiple corner plates 212 on the sliding block 206 contact the first terminal block group 203 and the second terminal block group 204, so that the three terminals of the first terminal block group 203 and the three terminals of the second terminal block group 204 are connected in a triangular manner to form a corner connection. By pushing the sliding block 206, the first terminal block group 203 and the second terminal block group 204 can switch between star connection and corner connection mode, achieving a quick connection of the required connection mode. The installation and connection operation is convenient, without the need for traditional multiple connecting pieces for terminal block installation and connection, and there will be no misoperation. The effect is good.

[0028] Preferred, such as Figures 3-5As shown, both the star connector plate 209 and the corner connector plate 212 are provided with contact grooves. The contact grooves are matched with the first terminal group 203 and the second terminal group 204. The contact grooves on the star connector plate 209 and the corner connector plate 212 are matched with the first terminal group 203 and the second terminal group 204 for contact connection. The contact connection area is large, avoiding the occurrence of incomplete connection.

[0029] Preferred, such as Figure 3 As shown, a push rod 207 is fixedly connected to the upper part of the sliding block 206. The push rod 207 on the sliding block 206 is convenient for hand pushing and easy pushing operation.

[0030] Preferred, such as Figure 4 and Figure 5 As shown, the upper ends of the three terminals of the first terminal group 203 are all connected to studs, and nuts are threaded onto the studs. The studs on the three terminals of the first terminal group 203, together with the nuts, provide a tight connection to the external circuit, making installation and connection convenient and quick.

[0031] Preferred, such as Figure 2 and Figure 3 As shown, a wiring groove 215 is provided on one side of the box 201. The cross-section of the wiring groove 215 is U-shaped. The U-shaped wiring groove 215 provided on one side of the box 201 facilitates the placement of wires and makes installation convenient.

[0032] Preferred, such as Figure 2 and Figure 3 As shown, a cover plate 202 is bolted to the upper end of the box body 201. A groove is provided on the cover plate 202, and a push rod 207 is set in the groove of the cover plate 202. The cover plate 202 bolted to the box body 201 seals the open end, and the groove on the cover plate 202 facilitates the installation of the push rod 207.

[0033] Preferred, such as Figure 2 and Figure 3 As shown, a fixing plate 213 is fixedly connected to the upper end of the cover plate 202. The fixing plate 213 is set on both sides of the groove of the cover plate 202. A push rod 207 is passed through the fixing plate 213 and a fixing rod 214 is connected through it. The fixing rod 214 is used to limit the push rod 207. The fixing rod 214 is connected through the holes that are matched on the fixing plate 213 and the push rod 207. The fixing rod 214 is locked by a locking pin when the push rod 207 moves to different positions to avoid the user's misoperation, which may lead to a change in the connection method or a short circuit that burns out the three-phase motor 1.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A three-phase motor wiring converter, comprising a three-phase motor (1) and a junction box assembly (2), wherein the junction box assembly (2) is disposed on the three-phase motor (1), characterized in that: The junction box assembly (2) includes a box body (201), in which a first terminal block group (203) and a second terminal block group (204) are fixedly connected. The first terminal block group (203) and the second terminal block group (204) each include three terminals. The first terminal block group (203) and the second terminal block group (204) are electrically connected to a three-phase motor (1). A conversion component is provided in the box body (201). The conversion component is used to convert between star connection and delta connection between the three terminals in the first terminal block group (203) and the second terminal block group (204).

2. A three-phase motor wiring converter according to claim 1, characterized in that: The conversion component includes a sliding block (206), a sliding rail (205) is connected to the bottom of the inner part of the housing (201), a sliding block (206) is slidably connected to the sliding block (206), and a plurality of corner plates (212) perpendicular to its long side are fixedly connected to the sliding block (206). The corner plates (212) are used for the triangular connection of the first terminal block group (203) and the second terminal block group (204). The bottom of the box (201) is connected to a number of push posts (208), and a star plate (209) parallel to its long side is attached to the sliding block (206). The star plate (209) is used for the star connection of the first terminal block group (203) and the second terminal block group (204). The sliding block (206) is provided with a limit port, and one end of the star plate (209) is movably engaged in the limit port. The limit port is used to drive the star plate (209) and make the star plate (209) move freely perpendicular to the sliding block (206). Several springs (211) are provided between the sliding block (206) and the star plate (209). The star-connecting plate (209) has several inclined push slots (210), and the push column (208) is snapped into the push slot (210). One end of the push slot (210) is provided with a locking slot, which is used to snap the push column (208).

3. A three-phase motor wiring converter according to claim 2, characterized in that: Both the star connector plate (209) and the corner connector plate (212) are provided with contact grooves, which are matched with the first terminal block group (203) and the second terminal block group (204).

4. A three-phase motor wiring converter according to claim 2 or 3, characterized in that: A push rod (207) is fixedly connected to the upper part of the sliding block (206).

5. A three-phase motor wiring converter according to claim 4, characterized in that: The upper ends of the three terminals of the first terminal block group (203) are all connected to studs, and the studs are threaded with nuts.

6. A three-phase motor wiring converter according to claim 5, characterized in that: A wiring groove (215) is provided on one side of the box (201), and the cross-section of the wiring groove (215) is U-shaped.

7. A three-phase motor wiring converter according to claim 6, characterized in that: The upper end of the box body (201) is bolted to a cover plate (202), and a groove is provided on the cover plate (202). The push rod (207) is set in the groove of the cover plate (202).

8. A three-phase motor wiring converter according to claim 7, characterized in that: A fixing plate (213) is fixedly connected to the upper end of the cover plate (202). The fixing plate (213) is set on both sides of the groove of the cover plate (202). The fixing plate (213) and the push rod (207) passing through it are connected to the fixing rod (214). The fixing rod (214) is used to limit the push rod (207).

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