Two-parameter switching structure of motor

Abstract

A two-parameter switching structure of a motor is characterized in that parameters comprise torque and rotating speed, and the two-parameter switching structure comprises a three-phase power line, a three-phase stator winding, three wiring copper bars, three wiring terminal groups and three end pin switching structures; the three-phase power line is correspondingly connected with the three wiring copper bars; the three-phase stator winding is respectively connected with the three wiring copper bars through the three wiring terminal groups to form three paths of single-phase circuits; wherein each phase of stator winding comprises two groups of coils, and two input terminals and two output terminals of the wiring terminal group are respectively connected with the head ends and the tail ends of the two groups of coils; in each single-phase circuit, the first input terminal is connected with the wiring copper bar, the second input terminal is connected with a fixed end of an end pin switching structure, and a free end of the end pin switching structure is in switching connection with the wiring copper bar and one of the output terminals, so that the two groups of coils are connected in series or in parallel. According to the utility model, switching of two motor parameters of high rotation speed and low torque and low rotation speed and large torque of the same motor can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor field, concretely relates to a double parameter switching structure of motor. BACKGROUND

[0002] In today's rapid development of electrical era, motor begins to occupy the important position in all walks of life, and permanent magnet synchronous motor compared with other motor has higher efficiency and power density and is widely welcomed. Conventional motor can only match a set of operating parameters of a model, if there are different parameter requirements, different motors need to be purchased, causing the rise of procurement cost.

[0003] Therefore, how to solve the deficiency existing in the prior art, the utility model wants to study and solve the subject. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a double parameter switching structure of motor.

[0005] In order to achieve the above object, the utility model adopts the technical scheme that:

[0006] A double parameter switching structure of motor, the parameter includes torque and rotating speed, the double parameter switching structure includes three phase power line, three phase stator winding, three wiring copper bars, three wiring terminal groups and three end foot switching structures;

[0007] The three phase power line is connected with the three wiring copper bars correspondingly;

[0008] The three phase stator winding is connected with the three wiring copper bars through the three wiring terminal groups respectively, and constitutes three single phase circuits;

[0009] Wherein, each phase stator winding includes two groups of coils, and the two input terminals and the two output terminals of the wiring terminal group are connected with the first end and the last end of the two groups of coils respectively;

[0010] In each single phase circuit, the first input terminal is connected with the wiring copper bar, the second input terminal is connected with the fixed end of an end foot switching structure, the free end of the end foot switching structure is connected with the wiring copper bar and one output terminal, so that the two groups of coils are connected in series or parallel.

[0011] Preferably, the end foot switching structure is a rotating copper bar, the fixed end of the rotating copper bar is rotatably connected on the second input terminal, and the free end of the rotating copper bar is detachably connected on the wiring copper bar or one output terminal.

[0012] Preferably, the three wiring copper bars are arranged side by side, the three wiring terminal groups are arranged on one side of the three wiring copper bars in the length direction, each of the input terminals is arranged in a row with one end of the wiring copper bar, and each of the output terminals is arranged in a row away from the wiring copper bar, the first input terminal corresponds to the first output terminal horizontally, and the second input terminal corresponds to the second output terminal horizontally.

[0013] Preferably, the two groups of coils are connected to the two input terminals and the two output terminals in parallel.

[0014] When the terminal switching structure is connected to the wiring copper bar, the two groups of coils are connected in parallel.

[0015] When the terminal switching structure is connected to the first output terminal, the two groups of coils are connected in series.

[0016] Preferably, the two groups of coils are connected to the two input terminals and the two output terminals in a cross shape.

[0017] When the terminal switching structure is connected to the wiring copper bar, the two groups of coils are connected in parallel.

[0018] When the terminal switching structure is connected to the second output terminal, the two groups of coils are connected in series.

[0019] Preferably, one end of the wiring copper bar has an inclined portion, the head of the inclined portion is connected to the terminal switching structure, and the tail of the inclined portion is connected to the first input terminal. When the terminal switching structure is connected to the wiring copper bar, the inclined portion and the terminal switching structure are distributed in a V shape.

[0020] Preferably, the three wiring copper bars are arranged in a stepped shape in the arrangement direction, and the three wiring terminal groups are arranged in a stepped shape in the arrangement direction.

[0021] Preferably, the wiring copper bar is provided with a plurality of support columns at the bottom, and the support columns are detachably mounted on a mounting plate.

[0022] The top end of the support column has a first boss, and the bottom end has a first headless screw which is threadedly connected to the mounting plate. The wiring copper bar is sleeved outside the first boss and connected to the first boss through a screw.

[0023] Preferably, the input terminals and the output terminals are detachably mounted on a mounting plate, and the mounting plate is provided with nuts corresponding to each terminal, and the terminals are threadedly connected to the nuts.

[0024] The top end of the terminal has a second boss, and the bottom end has a second headless screw.

[0025] The end foot switching structure or the wiring copper bar sleeve is arranged outside the second boss and is connected with the second boss through a screw;

[0026] The coil is welded on a copper column, and a screw hole at the top end of the copper column is threadedly connected with the second headless screw.

[0027] Preferably, the first output terminals of the three wiring terminal groups share a common output terminal, the common output terminal is connected with each second output terminal through a stepped copper bar at the top end, and is connected with a group of coils of each phase stator winding through the copper column at the bottom end.

[0028] The working principle and advantages of the utility model are as follows:

[0029] The utility model discloses three wiring terminal groups connect three phase stator windings and three phase wiring copper bars, and three rotating copper bars are arranged at the wiring terminal groups respectively, and the rotating copper bar is connected with the wiring copper bar and the output terminal through switching, so that the series connection or parallel connection of the two groups of coils of each phase stator winding is realized, and the switching of the high speed and low torque and the low speed and high torque of the same motor is realized, the working condition use range of the motor is expanded, and the problem that two types of motors need to be purchased when the user has two motor parameter requirements is solved.

[0030] The utility model discloses when switching the motor parameter, only need to rotate the rotating copper bar and make its free end connect with the wiring copper bar or an output terminal, without disassembling three phase power line, simple operation.

[0031] The utility model discloses three wiring copper bars are arranged in the height direction staggered, can guarantee electrical clearance, and need not adopt insulation structure, for different voltage power supply working condition, only need to adopt different size of double parameter switching structure.

[0032] The utility model discloses each wiring terminal group is arranged at one side of the wiring copper bar connected with it, and four terminals included in the wiring terminal group can be distributed in rectangular array, the wiring terminal group is arranged compactly, reduces the space occupation, leaves greater space for the installation of three phase power line on the other side, and facilitates wiring operation.

[0033] The utility model discloses the copper column thread connection of the bottom end of wiring terminal and welded coil, and the top end can be fixed rotating copper bar or wiring copper bar through screw, and the connection mode is simple, easy operation. ACCURACY

[0034] ATTACH Figure 1 It is 6 way high speed low torque scheme schematic drawing of the utility model embodiment 1;

[0035] ATTACH Figure 2 It is 3 way low speed high torque scheme schematic drawing of the utility model embodiment 1;

[0036] Appendix Figure 3 This is a schematic diagram of the 6-channel high-speed low-torque scheme in Embodiment 2 of this utility model;

[0037] Appendix Figure 4 This is a schematic diagram of the 3-way low-speed high-torque scheme in Embodiment 2 of this utility model;

[0038] Appendix Figure 5 This is an overall isometric view of Embodiment 2 of this utility model;

[0039] Appendix Figure 6 This is an overall cross-sectional view of Embodiment 2 of the present invention;

[0040] Appendix Figure 7 This is a schematic diagram of the 6-channel high-speed low-torque scheme in Embodiment 3 of this utility model;

[0041] Appendix Figure 8 This is a schematic diagram of the three-way low-speed, high-torque scheme of Embodiment 3 of this utility model.

[0042] In the above attached diagrams: 1. Mounting plate; 2. Three-phase stator winding; 21. U-phase stator winding; 22. V-phase stator winding; 23. W-phase stator winding; 3. Terminal busbar; 31. Inclined section; 4. Terminal assembly; 5. Terminal switching structure; 6. Support column; 7. Screw and nut assembly; 8. Copper column; 9. Stepped copper busbar;

[0043] U11. First U-phase input terminal; U12. Second U-phase input terminal; U21. First U-phase output terminal; U22. Second U-phase output terminal; V11. First V-phase input terminal; V12. Second V-phase input terminal; V21. First V-phase output terminal; V22. Second V-phase output terminal; W11. First W-phase input terminal; W12. Second W-phase input terminal; W21. First W-phase output terminal; W22. Second W-phase output terminal; Y2. Common output terminal. Detailed Implementation

[0044] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0045] Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0046] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0047] As used herein, "first", "second", and the like, do not necessarily mean a specific order or sequence, nor are they used to limit the present application, but are merely used to distinguish components or operations described by the same technical terms.

[0048] As used herein, "connected" or "positioned" can mean that two or more components or devices are directly in physical contact with each other, or indirectly in physical contact with each other via an intermediary, or that two or more components or devices are operatively or communicatively coupled with each other.

[0049] As used herein, "comprising", "including", "having" and the like are open-ended terms that mean "including but not limited to".

[0050] As used herein, the terms used are generally of the ordinary meaning used in the art, in the context of the present application, and in the special context, unless otherwise specifically defined. Some terms used to describe the present application are discussed below or elsewhere in the specification to provide additional guidance to those skilled in the art on the description of the present application.

[0051] As used herein, "front", "back", "up", "down", "left", "right", and the like are directional terms used in the present application only to illustrate the positional relationship between structures, and are not used to limit the scope of protection and the specific direction in actual implementation.

[0052] Embodiment 1, see attached Figures 1-2 As shown in the drawings, a dual-parameter switching structure of an electric machine, the parameters including torque and speed, the dual-parameter switching structure including three-phase power lines, three-phase stator windings 2, three wiring copper bars 3, three wiring terminal groups 4, and three terminal foot switching structures 5.

[0053] In this embodiment, the three wiring copper bars 3 are arranged side by side and can be detachably connected to the mounting plate 1 in the wiring box. The connection mode is that the three wiring copper bars 3 are provided with a plurality of support columns 6 at the bottom, the support columns 6 are detachably mounted on the mounting plate 1, the top end of the support column 6 has a first boss, and the bottom end has a first headless screw, which is threadedly connected to the mounting plate 1, the wiring copper bar 3 is sleeved outside the first boss and connected with the first boss through a screw, and the wiring copper bar 3 is fixed on the top end of the support column 6 by tightening the screw.

[0054] In this embodiment, the three-phase power lines are connected to the three wiring copper bars 3 correspondingly, and the connection mode is that the three-phase power lines are fixed on the wiring copper bars 3 through a plurality of screw nut assemblies 7.

[0055] In this embodiment, the three-phase stator windings 2 are connected to the three wiring copper bars 3 through the three wiring terminal groups 4 respectively, forming three single-phase circuits;

[0056] Each phase stator winding comprises two groups of coils, and the terminal group 4 comprises two input terminals and two output terminals connected with the first and last ends of the two groups of coils respectively;

[0057] In each single-phase circuit, the first input terminal is connected with the copper bus 3, and the second input terminal is connected with the fixed end of the terminal switching structure 5, and the free end of the terminal switching structure 5 is switchedly connected with the copper bus 3 and one of the output terminals, so that the two groups of coils are connected in series or parallel.

[0058] In this embodiment, the terminal switching structure 5 is a rotating copper bus, the fixed end of which is rotatably connected with the second input terminal, and the free end of which is detachably connected with the copper bus 3 or one of the output terminals.

[0059] In this embodiment, the three terminal groups 4 are arranged on one side of the three copper buses 3 in the length direction, the input terminals are arranged in a row at one end of the copper bus 3, and the output terminals are arranged in a row away from the copper bus 3, the first input terminal corresponds to the first output terminal horizontally, and the second input terminal corresponds to the second output terminal horizontally.

[0060] In this embodiment, the two groups of coils are connected with the two input terminals and the two output terminals in a cross shape, when the terminal switching structure 5 is connected with the copper bus 3, the two groups of coils are connected in parallel, and when the terminal switching structure 5 is connected with the second output terminal, the two groups of coils are connected in series (end to end).

[0061] In this embodiment, the three-phase stator winding 2 comprises a U-phase stator winding 21, a V-phase stator winding 22 and a W-phase stator winding 23. The U-phase stator winding 21 comprises first and second groups of U-phase coils, the V-phase stator winding 22 comprises first and second groups of V-phase coils, and the W-phase stator winding 23 comprises first and second groups of W-phase coils.

[0062] The three terminal groups 4 comprise a U-phase terminal group for connecting the U-phase stator winding 21, a V-phase terminal group for connecting the V-phase stator winding 22, and a W-phase terminal group for connecting the W-phase stator winding 23. Each phase terminal group comprises two input terminals and two output terminals.

[0063] The first U-phase input terminal U11 is connected with the copper bus 3, the second U-phase input terminal U12 is connected with the fixed end of the first end pin switching structure 5, the first U-phase input terminal U11 and the second U-phase output terminal U22 are respectively connected with the head and tail ends of the first group of U-phase coils, and the second U-phase input terminal U12 and the first U-phase output terminal U21 are respectively connected with the head and tail ends of the second group of U-phase coils. When the end pin switching structure 5 is connected with the copper bus 3, the first and second groups of U-phase coils are connected in parallel; when the end pin switching structure 5 is connected with the second U-phase output terminal U22, the first and second groups of U-phase coils are connected in series.

[0064] The first V-phase input terminal V11 is connected with the copper bus 3, the second V-phase input terminal V12 is connected with the fixed end of the second end pin switching structure 5, the first V-phase input terminal V11 and the second V-phase output terminal V22 are respectively connected with the head and tail ends of the first group of V-phase coils, and the second V-phase input terminal V12 and the first V-phase output terminal V21 are respectively connected with the head and tail ends of the second group of V-phase coils. When the end pin switching structure 5 is connected with the copper bus 3, the first and second groups of V-phase coils are connected in parallel; when the end pin switching structure 5 is connected with the second V-phase output terminal V22, the first and second groups of V-phase coils are connected in series.

[0065] The first W-phase input terminal W11 is connected with the copper bus 3, the second W-phase input terminal W12 is connected with the fixed end of the third end pin switching structure 5, the first W-phase input terminal W11 and the second W-phase output terminal W22 are respectively connected with the head and tail ends of the first group of W-phase coils, and the second W-phase input terminal W12 and the first W-phase output terminal W21 are respectively connected with the head and tail ends of the second group of W-phase coils. When the end pin switching structure 5 is connected with the copper bus 3, the first and second groups of W-phase coils are connected in parallel; when the end pin switching structure 5 is connected with the second W-phase output terminal W22, the first and second groups of W-phase coils are connected in series.

[0066] When the two groups of coils in each single-phase circuit are connected in parallel, the six groups of coils of the entire three-phase stator winding 2 are connected in parallel in six paths, realizing a six-path high-speed low-torque scheme, as shown in Figure 1 ; when the two groups of coils in each single-phase circuit are connected in series, the six groups of coils of the entire three-phase stator winding 2 are connected in parallel in three paths, realizing a three-path low-speed large-torque scheme, as shown in Figure 2 .

[0067] Through the above wiring mode, only the free end connection position of the rotating copper bus needs to be switched to realize the switching of the two motor parameters, and the three-phase power supply line does not need to be disassembled, so the operation is convenient and fast.

[0068] In this embodiment, one end of the copper busbar 3 has an inclined portion 31. The head of the inclined portion 31 is connected to the terminal switching structure 5, and the tail of the inclined portion 31 is connected to the first input terminal. When the terminal switching structure 5 is connected to the copper busbar 3, the inclined portion 31 and the terminal switching structure 5 are arranged in a V-shape. This arrangement is more compact and does not occupy space.

[0069] In this embodiment, the three copper busbars 3 are arranged in a stepped shape with increasing height in the arrangement direction, and the three terminal blocks 4 are also arranged in a stepped shape with increasing height in the same direction. By staggering the copper busbars in the height direction, electrical clearance can be ensured.

[0070] In this embodiment, both the input terminal and the output terminal can be detachably mounted on the mounting plate 1. Nuts are fixedly provided on the mounting plate 1 for each terminal, and the terminals are threadedly connected to the nuts.

[0071] The terminal has a second protrusion at the top and a second headless screw at the bottom;

[0072] The end-pin switching structure 5 or the wiring copper bus 3 is sleeved on the outside of the second boss and connected to the second boss by screws.

[0073] The coil is welded to a copper pillar 8, and the screw hole at the top of the copper pillar 8 is threadedly connected to the second headless screw.

[0074] Example 2, see appendix Figures 3-6 As shown, this embodiment is basically the same as embodiment 1, except that: the first output terminals of the three terminal groups 4 share a common output terminal Y2. The top of the common output terminal Y2 is connected to each of the second output terminals through a stepped copper busbar 9, and the bottom is connected to a set of coils of each phase stator winding through the copper pillar. This design can reduce the number of terminals and simplify wiring.

[0075] Example 3, see appendix Figures 7-8 As shown, this embodiment is basically the same as embodiment 1, except that: the two sets of coils are connected in parallel to the two input terminals and the two output terminals. When the terminal switching structure 5 is connected to the copper busbar 3, the two sets of coils are connected in parallel; when the terminal switching structure 5 is connected to the first output terminal, the two sets of coils are connected in series.

[0076] The first U-phase input terminal U11 and the first U-phase output terminal U21 are connected with the head and tail of the first group of U-phase coils respectively, and the second U-phase input terminal U12 and the second U-phase output terminal U22 are connected with the head and tail of the second group of U-phase coils respectively. When the lug switching structure 5 is connected with the copper bar 3, the first and second groups of U-phase coils are connected in parallel; when the lug switching structure 5 is connected with the first U-phase output terminal U21, the first and second groups of U-phase coils are connected in series.

[0077] The first V-phase input terminal V11 and the first V-phase output terminal V21 are connected with the head and tail of the first group of V-phase coils respectively, and the second V-phase input terminal V12 and the second V-phase output terminal V22 are connected with the head and tail of the second group of V-phase coils respectively. When the lug switching structure 5 is connected with the copper bar 3, the first and second groups of V-phase coils are connected in parallel; when the lug switching structure 5 is connected with the first V-phase output terminal V21, the first and second groups of V-phase coils are connected in series.

[0078] The first W-phase input terminal W11 and the first W-phase output terminal W21 are connected with the head and tail of the first group of W-phase coils respectively, and the second W-phase input terminal W12 and the second W-phase output terminal W22 are connected with the head and tail of the second group of W-phase coils respectively. When the lug switching structure 5 is connected with the copper bar 3, the first and second groups of W-phase coils are connected in parallel; when the lug switching structure 5 is connected with the first W-phase output terminal W21, the first and second groups of W-phase coils are connected in series.

[0079] Through the above wiring mode, only the free end connection position of the rotating copper bar needs to be switched to realize the switching of the two motor parameters, and the three-phase power supply line does not need to be disassembled, so that the operation is convenient and fast.

[0080] The above embodiments are only for illustrating the technical concept and characteristics of the utility model, and the purpose is to enable those skilled in the art to understand the content of the utility model and implement it, and cannot limit the protection scope of the utility model. Any equivalent change or modification according to the spirit and essence of the utility model should be covered in the protection scope of the utility model.

Claims

1. A dual parameter switching structure of an electric machine, the parameters including torque and rotational speed, characterized by: The double-parameter switching structure comprises three-phase power lines, three-phase stator windings, three copper bars, three terminal groups and three terminal switching structures; The three-phase power lines are connected with the three copper bars correspondingly; The three-phase stator windings are connected with the three copper bars through the three terminal groups respectively, forming three single-phase circuits. Each phase stator winding comprises two groups of coils, and the terminal group comprises two input terminals and two output terminals connected with the first and last ends of the two groups of coils respectively. In each single-phase circuit, the first input terminal is connected with the copper bar, the second input terminal is connected with the fixed end of a terminal switching structure, the free end of the terminal switching structure is connected with the copper bar and one of the output terminals, so that the two groups of coils are connected in series or parallel.

2. A dual parameter switching structure of an electric machine according to claim 1, characterized in that: The terminal switching structure is a rotating copper bar, the fixed end of the rotating copper bar is rotatably connected with the second input terminal, and the free end of the rotating copper bar is detachably connected with the copper bar or one of the output terminals.

3. A dual parameter switching structure of an electric machine according to claim 2, characterized in that: The three copper bars are arranged side by side, the three terminal groups are arranged on one side of the three copper bars in the length direction, the input terminals are arranged in a row at one end of the copper bars, the output terminals are arranged in a row away from the copper bars, the first input terminal corresponds to the first output terminal horizontally, and the second input terminal corresponds to the second output terminal horizontally.

4. A dual parameter switching structure of an electric machine according to claim 3, characterized in that: The two groups of coils are connected with the two input terminals and the two output terminals in parallel; When the terminal switching structure is connected with the copper bar, the two groups of coils are connected in parallel; When the terminal switching structure is connected with the first output terminal, the two groups of coils are connected in series.

5. A dual parameter switching structure of an electric machine according to claim 3, characterized by: The two groups of coils are connected with the two input terminals and the two output terminals in cross shape; When the terminal switching structure is connected with the copper bar, the two groups of coils are connected in parallel; When the terminal switching structure is connected with the second output terminal, the two groups of coils are connected in series.

6. A dual parameter switching structure of an electric machine according to claim 4 or 5, characterized in that: One end of the copper bar has an inclined part, the head of the inclined part is connected with the terminal switching structure, and the tail of the inclined part is connected with the first input terminal, and when the terminal switching structure is connected with the copper bar, the inclined part and the terminal switching structure are distributed in V shape.

7. The dual parameter switching structure of an electric machine according to claim 1, characterized by: The three copper bars are arranged in steps in the arrangement direction, and the three terminal groups are arranged in steps in the arrangement direction.

8. The dual parameter switching structure of an electric machine according to claim 1, characterized by: The copper bar is provided with a plurality of support columns at the bottom, and the support columns are detachably installed on a mounting plate; The top end of the support column is provided with a first boss, and the bottom end is provided with a first headless screw, the first headless screw is threadedly connected with the mounting plate, and the copper bar is sleeved outside the first boss and connected with the first boss through a screw.

9. A dual parameter switching structure of an electric machine according to claim 3, characterized in that: The input terminals and the output terminals are detachably installed on a mounting plate, and the mounting plate is provided with nuts corresponding to the terminals, and the terminals are threadedly connected with the nuts; The top end of the terminal is provided with a second boss, and the bottom end is provided with a second headless screw. The end foot switching structure or the wiring copper bar sleeve is arranged outside the second boss and connected with the second boss through a screw; The coil is welded on a copper column, and a screw hole at the top of the copper column is threadedly connected with the second headless screw.

10. A dual parameter switching structure of an electric machine according to claim 9, characterized in that: The first output terminals of the three groups of connection terminals share a common output terminal, the top of the common output terminal is connected with the second output terminals through a stepped copper bar, and the bottom of the common output terminal is connected with a group of coils of the phase stator winding through the copper column.

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