A multi-stage motor

Abstract

The utility model relates to a multi-section motor, including a plurality of stator segments and a mover moving along the upper surface of the stator segment, wherein the stator segment includes a core segment, two transition segments and two air-core segments; the core segment includes a core magnetic conductive core and a core coil; the two transition segments are respectively connected to the two ends of the core segment, the transition segment includes a transition magnetic conductive core, a transition coil and a transition non-magnetic bracket, the transition magnetic conductive core is composed of a transition iron core tooth and a transition iron core yoke, and the height of the transition iron core tooth on the transition segment gradually decreases along the direction away from the core segment; the two air-core segments are respectively connected to the outside of the two transition segments, and the air-core segments include an air-core coil and an air-core non-magnetic bracket. The multi-section motor can realize a smooth transition of the edge effect when the mover moves into or out of the core segment, reduce the thrust fluctuation caused by the edge effect, and ensure the stable operation of the mover.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet linear motors, in particular to a multi-section motor. Background Art

[0002] In order to meet the needs of high-flexibility, high-efficiency and high-precision cargo transportation in industrial production, express logistics and other occasions, direct-drive transmission systems with permanent magnet linear motors as core drive components have received more and more attention. At present, this type of transmission system mostly adopts a non-electric mover solution, using permanent magnets and magnetic back iron as the movers of permanent magnet linear motors for transporting goods, and magnetic cores and armature coils as stators of permanent magnet linear motors. This design can avoid the problems of energy storage and cruising range on the mover. In long-stroke occasions, in order to reduce costs and increase energy efficiency, the stator is usually not laid all over the track, but arranged in sections. When the mover passes through the stator, the coil is energized to generate electromagnetic thrust, which accelerates the mover; when the mover leaves the stator, it relies on inertia to pass through the gap between the stators. However, the magnetic permeability of the magnetic core and the air is different, so that there is a longitudinal edge effect when the mover moves in or out of the stator, which will cause obvious thrust fluctuations in the force on the mover, causing vibration, increasing the risk of cargo damage and system failure. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a multi-stage motor, which can realize smooth transition when the mover moves into or out of the stator, reduce the thrust fluctuation caused by the longitudinal edge effect, and ensure the stable operation of the mover.

[0004] The technical solution adopted by the utility model is a multi-segment motor, comprising a plurality of stator segments and a mover moving along the upper surface of the stator segment, wherein the mover comprises a permanent magnet and a magnetic back iron; the stator segment comprises a core segment, two transition segments and two air core segments; the core segment comprises a core magnetic core and a core coil, the core magnetic core comprises core iron core teeth and a core iron core yoke, the core coil is wound on the core iron core teeth, and the height of each core iron core tooth is the same; the two transition segments are respectively connected to the two ends of the core segment, the transition segment comprises a transition magnetic core, a transition coil and a transition air core A magnetic bracket, wherein the transition magnetic conductive core is composed of a transition core tooth and a transition core yoke, the transition coil is wound on the transition core tooth, the height of the transition core tooth on the transition section gradually decreases in the direction away from the core section, and the upper surface of the transition non-magnetic bracket is flush with the upper surface of the core section; the two hollow core sections are respectively connected to the outer sides of the two transition sections, the hollow core section includes an hollow core coil and an hollow core non-magnetic bracket, the hollow core coil is wound on the hollow core non-magnetic bracket, the upper surface of the hollow core section is flush with the upper surface of the transition non-magnetic bracket, and the multi-section motor also includes a first current regulating module for adjusting the current in the hollow core coil.

[0005] The beneficial effects of the utility model are as follows: by using the above-mentioned multi-section motor, when the mover is located in the core section, the working principle of the motor is the same as that of the existing motor, and the electromagnetic thrust is generated by supplying power to the core coil to make the mover accelerate or decelerate smoothly; when the mover is located in the transition section, due to the gradual reduction in the height of the transition iron core teeth, a smooth change in the longitudinal end effect can be achieved, and the longitudinal end effect can be eliminated; when the mover is located in the air-core section, due to the structure of the air-core section, there is no thrust fluctuation generated by the magnetic core in the electromagnetic thrust, and the current in the air-core coil is gradually reduced by the first current regulation module, so that the electromagnetic thrust exerted on the mover drops smoothly to zero, that is, the same as the force exerted on the mover after it moves out of the stator; the core section of the multi-section motor is consistent with the stator structure of the existing permanent magnet linear motor, and transition sections and air-core sections are added on both sides of the core section, so as to achieve a smooth transition of the longitudinal edge effect in the process of the mover moving in or out of the core section, reduce the thrust fluctuation caused by the longitudinal edge effect, and ensure the smooth operation of the mover.

[0006] Preferably, the multi-stage motor further comprises a second current regulating module for compensating the current in the transition coil. With this structure, the longitudinal end effect can be completely eliminated, so that the smooth transition effect is optimized.

[0007] Preferably, the core magnetic permeability core is a closed slot structure. This structure helps to reduce the harmonic content of the air gap magnetic permeability of the core section, making the acceleration or deceleration process of the mover in the core section smoother.

[0008] Preferably, the boundary line between the transitional magnetic permeable core and the transitional non-magnetic bracket is a straight line. This structure helps to reduce the difficulty of processing the transitional magnetic permeable core and the transitional non-magnetic bracket and reduce the production cost of the motor.

[0009] Preferably, the boundary line between the transitional magnetic permeable core and the transitional non-magnetic bracket is in the shape of a polynomial function curve or an exponential function curve. With this structure, the change process of the longitudinal end effect of the motor can be smoother, which helps to further improve the stability of the mover operation.

[0010] Preferably, the core coil, transition coil and air-core coil are all the same in size. With this structure, the three coils can be produced and used in a unified manner, which helps to reduce the production cost and maintenance cost of the motor.

[0011] Preferably, the size of the air-core coil is larger than that of the core coil and the transition coil. This structure can compensate for the decrease in thrust density of the air-core section due to the absence of a magnetically conductive core, improve the thrust coefficient of the air-core section, and help improve the motor efficiency.

[0012] Preferably, the core coil, transition coil and air-core coil are concentrated windings. With this structure, the end length of the coil can be reduced, which helps to reduce the size of the core section, transition section and air-core section, thereby reducing the production cost of the motor.

[0013] Preferably, the permanent magnet adopts Halbach magnetization method. This structure is helpful to increase the thrust coefficient of the motor, reduce the motor winding loss and improve the motor efficiency.

[0014] Preferably, the permanent magnet is magnetized in an alternating pole manner. This structure helps to reduce the amount of permanent magnets used in the motor and achieve the purpose of reducing the production cost of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a multi-directional motor described in Embodiment 1 of the present utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the transition section described in Embodiment 1 of the present utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the transition section described in the second embodiment of the present utility model;

[0018] As shown in the figure: 1. core section; 2. transition section; 3. air core section; 4. mover; 11. core magnetic conductive core; 12. core coil; 111. core iron core teeth; 112. core iron core yoke; 21. transition magnetic conductive core; 22. transition coil; 23. transition non-magnetic bracket; 211. transition iron core teeth; 212. transition iron core yoke; 31. air core coil; 32. air core non-magnetic bracket; 41. permanent magnet; 42. magnetic conductive back iron. DETAILED DESCRIPTION

[0019] The utility model is further described below with reference to the accompanying drawings and in combination with specific implementations, so that those skilled in the art can implement it with reference to the text of the description. The protection scope of the utility model is not limited to the specific implementations.

[0020] Those skilled in the art should understand that, in the disclosure of the present invention, the orientation or positional relationship indicated by terms such as "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0021] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0022] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] Embodiment 1:

[0024] The utility model relates to a multi-segment motor, comprising a plurality of stator segments and a mover 4 moving along the upper surface of the stator segments, wherein the mover 4 comprises a permanent magnet 41 and a magnetic back iron 42, and the mover 4 is a flat linear structure, and there is a gap between two adjacent stator segments; Figure 1As shown, the stator segment includes a core segment 1, a transition segment 2 and an air core segment 3; the core segment 1 includes a core permeable core 11 and a core coil 12, the core permeable core 11 is composed of a core core tooth 111 and a core core yoke 112, the core coil 12 is wound on the core core tooth 111, and the height of each core core tooth 111 is the same; the two transition segments 2 are respectively connected to the two ends of the core segment 1, the transition segment 2 includes a transition permeable core 21, a transition coil 22 and a transition non-magnetic bracket 23, the transition permeable core 21 is composed of a transition core tooth 211 and a transition core yoke 212, the transition coil 22 is wound on the transition core tooth 211, and the height of each transition core tooth 211 is different Similarly, the height of the transition core teeth 211 on the transition section 2 gradually decreases in the direction away from the core section 1, that is, the closer the transition core teeth 211 are to the core section 1, the higher they are. The upper surface of the transition non-magnetic bracket 23 is flush with the upper surface of the core section 1, that is, the transition non-magnetic bracket 23 and the transition magnetic conductive core 21 form a complementary structure; the hollow core section 3 is located outside the transition section 2, and the hollow core section 3 includes an hollow core coil 31 and an hollow core non-magnetic bracket 32. The hollow core coil 31 is wound on the hollow core non-magnetic bracket 32, and the upper surface of the hollow core section 3 is flush with the upper surface of the transition non-magnetic bracket 23. The multi-section motor also includes a first current regulating module for adjusting the current in the hollow core coil 31.

[0025] Figure 1 In the embodiment, the core magnetic conductive core 11 is a closed slot structure, the boundary shape between the transition magnetic conductive core 21 and the transition non-magnetic bracket 23 is a straight line, the core coil 12, the transition coil 22 and the air-core coil 31 are all the same size and are concentrated windings, which can achieve a smooth change in the longitudinal end effect and improve the smoothness of the rotor operation. At the same time, the processing technology of the transition magnetic conductive core and the transition non-magnetic bracket is relatively simple, and the three coils can be produced and used in a unified manner, which helps to reduce the production cost and maintenance cost of the motor.

[0026] Figure 2 In the figure, the transition section 2 includes a transition magnetic conductive core 21, a transition coil 22 and a transition non-magnetic bracket 23. The transition magnetic conductive core 21 is composed of a transition core tooth 211 and a transition core yoke 212. The transition coil 22 is wound on the transition core tooth 211. The height of each transition core tooth 211 is different. The height of the transition core tooth 211 on the transition section 2 gradually decreases in the direction away from the core section 1. The boundary line between the transition magnetic conductive core 21 and the transition non-magnetic bracket 23 is a straight line. The transition non-magnetic bracket 23 and the transition magnetic conductive core 21 form a complementary structure, that is, the height of the upper surface of the transition non-magnetic bracket is greater than the height of the transition coil, and the upper surface of the transition non-magnetic bracket is flush with the upper surface of the core section, which helps to reduce the processing difficulty of the transition magnetic conductive core and the transition non-magnetic bracket and reduce the production cost of the motor.

[0027] The working principle of a multi-stage motor of the utility model is as follows: when the mover 4 moves on the core segment 1, the working principle of the motor is the same as that of the motor in the prior art, that is, the electromagnetic thrust is generated by supplying power to the core coil 12, so that the mover 4 is smoothly accelerated or decelerated; when the mover 4 moves to the transition segment 2, since the height of the transition core teeth 211 is gradually reduced, a smooth change of the longitudinal end effect can be achieved, and the longitudinal end effect is eliminated; when the mover 4 moves to the air-core segment 3, the air-core segment 3 is not provided with a magnetic conductive core, and there is no thrust fluctuation generated by the magnetic conductive core in the electromagnetic thrust, and the current in the air-core coil 31 is gradually reduced by the first current regulating module, so that the electromagnetic thrust received by the mover 4 is smoothly reduced to zero, that is, the force received by the mover 4 is the same as that after the mover 4 drives out of the stator; similarly, when the mover 4 directly drives into the core segment 1 from outside the stator, a smooth change of the force received by the mover 4 can also be achieved. The core segment 1 of the multi-segment motor is consistent with the stator structure of the existing permanent magnet linear motor, and a transition segment 2 and a hollow core segment 3 are added on both sides of the core segment 1, so as to achieve a smooth transition of the longitudinal edge effect when the mover moves in or out of the core segment, reduce the thrust fluctuation caused by the longitudinal edge effect, ensure the smooth operation of the mover 4, and improve the smoothness of the operation of the mover 4.

[0028] Embodiment 2:

[0029] The utility model relates to a multi-segment motor, comprising a plurality of stator segments and a mover 4 moving along the upper surface of the stator segments, wherein the mover 4 comprises a permanent magnet 41 and a magnetic back iron 42, and the mover 4 is a flat linear structure; Figure 1As shown, the stator segment includes a core segment 1, a transition segment 2, an air core segment 3 and a mover 4; the core segment 1 includes a core permeable core 11 and a core coil 12, the core permeable core 11 is composed of a core core tooth 111 and a core core yoke 112, the core coil 12 is wound on the core core tooth 111, and the height of each core core tooth 111 is the same; the two transition segments 2 are respectively connected to the two ends of the core segment 1, the transition segment 2 includes a transition permeable core 21, a transition coil 22 and a transition non-magnetic bracket 23, the transition permeable core 21 is composed of a transition core tooth 211 and a transition core yoke 212, the transition coil 22 is wound on the transition core tooth 211, and the height of each transition core tooth 211 is the same. The height of the transition core teeth 211 on the transition section 2 gradually decreases in the direction away from the core section 1, that is, the closer the transition core teeth 211 are to the core section 1, the higher they are. The upper surface of the transition non-magnetic bracket is flush with the upper surface of the core section, that is, the transition non-magnetic bracket 23 and the transition magnetic core 21 form a complementary structure; the air-core section 3 is located outside the transition section 2, and the air-core section 3 includes an air-core coil 31 and an air-core non-magnetic bracket 32. The air-core coil 31 is wound on the air-core non-magnetic bracket 32, and the upper surface of the air-core section 3 is flush with the upper surface of the transition non-magnetic bracket 23. The multi-section motor also includes a first current regulating module for adjusting the current in the air-core coil 31.

[0030] like Figure 3 As shown, the transition section 2 includes a transition magnetic core 21, a transition coil 22 and a transition non-magnetic bracket 23. The transition magnetic core 21 is composed of a transition core tooth 211 and a transition core yoke 212. The transition coil 22 is wound on the transition core tooth 211. The height of each transition core tooth 211 is different. The height of the transition core tooth 211 on the transition section 2 gradually decreases in the direction away from the core section 1. The boundary line between the transition magnetic core 21 and the transition non-magnetic bracket 23 is an exponential function curve. The transition non-magnetic bracket 23 and the transition magnetic core 21 form a complementary structure, that is, the height of the upper surface of the transition non-magnetic bracket is greater than the height of the transition coil, and the upper surface of the transition non-magnetic bracket is flush with the upper surface of the core section, which can make the change process of the longitudinal edge effect of the motor smoother, which helps to further improve the smoothness of the mover operation.

Claims

1. A multi-segment motor, comprising a plurality of stator segments and a mover (4) moving along the upper surface of the stator segments, wherein the mover (4) comprises a permanent magnet (41) and a magnetic back iron (42); characterized in that: The stator segment comprises a core segment (1), two transition segments (2) and two air core segments (3); the core segment (1) comprises a core magnetic permeable core (11) and a core coil (12); the core magnetic permeable core (11) comprises a core iron core tooth (111) and a core iron core yoke (112); the core coil (12) is wound on the core iron core tooth (111); the height of each core iron core tooth (111) is the same; the two transition segments (2) are respectively connected to the two ends of the core segment (1); the transition segment (2) comprises a transition magnetic permeable core (21), a transition coil (22) and a transition non-magnetic bracket (23); the transition magnetic permeable core (21) comprises a transition iron core tooth (211) and a transition iron core yoke (2 12), the transition coil (22) is wound on the transition core teeth (211), the height of the transition core teeth (211) on the transition section (2) gradually decreases in the direction away from the core section (1), and the upper surface of the transition non-magnetic bracket (23) is flush with the upper surface of the core section (1); the two air-core sections (3) are respectively connected to the outer sides of the two transition sections (2), the air-core section (3) comprises an air-core coil (31) and an air-core non-magnetic bracket (32), the air-core coil (31) is wound on the air-core non-magnetic bracket (32), the upper surface of the air-core section (3) is flush with the upper surface of the transition non-magnetic bracket (23), and the multi-section motor further comprises a first current regulating module for regulating the current in the air-core coil (31).

2. A multi-stage motor according to claim 1, characterized in that: The multi-stage motor also includes a second current regulating module for compensating the current in the transition coil (22).

3. A multi-stage motor according to claim 1 or 2, characterized in that: The core magnetic conductive core (11) is a closed slot structure.

4. A multi-stage motor according to claim 1 or 2, characterized in that: The boundary line between the transitional magnetic permeable core (21) and the transitional non-magnetic bracket (23) is in the shape of a straight line.

5. A multi-stage motor according to claim 1 or 2, characterized in that: The boundary line between the transitional magnetic permeable core (21) and the transitional non-magnetic support (23) is in the shape of a polynomial function curve or an exponential function curve.

6. A multi-stage motor according to claim 1, characterized in that: The core coil (12), transition coil (22) and air-core coil (31) are all of the same size.

7. A multi-stage motor according to claim 1, characterized in that: The size of the air-core coil (31) is larger than the size of the core coil (12) and the transition coil (22).

8. A multi-stage motor according to claim 1 or 6, characterized in that: The core coil (12), transition coil (22) and air-core coil (31) are concentrated windings.

9. A multi-stage motor according to claim 1, characterized in that: The permanent magnet (41) is magnetized using the Halbach method.

10. The multi-stage motor according to claim 1, characterized in that: The permanent magnet (41) is magnetized in an alternating pole manner.

Images