A laminated winding core structure and heat dissipation system integration

Abstract

The application relates to the technical field of electromagnetic coils, and discloses a laminated winding core structure and heat dissipation system integrated structure, wherein the core structure and the heat dissipation system structure are inlaid in each phase tooth-shaped coil structure in the same layer, after each phase winding is rotated and laminated or offset and laminated, the effect of the core, the heat dissipation pipe and the wire layer is realized, and the other two sides of the wire are both the core structure. The laminated winding core structure and the heat dissipation system integrated structure significantly enhance the heat dissipation performance of the motor winding, improve the magnetic aggregation performance of the stator and the structural performance.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic coil technology, and in particular to a layered winding core structure and heat dissipation system integration. Background Technology

[0002] The motor winding is the core and physical foundation of the motor, serving as the physical carrier and executor of electromagnetic energy conversion. It directly shapes the motor's core electromagnetic performance (torque, efficiency, noise, back EMF, inductance, etc.) and determines its key electrical parameters (voltage, current, power, speed, number of phases), significantly influencing the motor's power density, efficiency, and thermal performance. The motor winding core structure and heat dissipation system structure are crucial components of the motor, directly affecting the performance indicators of each phase. This invention proposes a layered winding core structure and integrated heat dissipation system based on interlayer phase, aiming to provide a competitive option for reducing winding leakage flux, improving winding heat dissipation and structural strength, miniaturizing the motor, and reducing economic costs. Summary of the Invention

[0003] This invention proposes an integrated stacked winding core structure and heat dissipation system based on interlayer phase, aiming to reduce winding leakage flux, improve winding heat dissipation and structural strength performance.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A layered winding core structure and heat dissipation system integration, characterized in that: 1) The lap-type winding is formed by lapping toothed coils. The number of winding phases is m, the number of pole pairs is p, the rotation angle is α=2π / (pm), the number of toothed coils is k, the number of lapped toothed coils per phase is n, and the pole pitch is d. The lap-type toothed coils can be lapped in the following ways: rotation lap, rotation nested lap, and offset lap. Each phase of the m-phase toothed coil is lapped by rotating by an angle α or by offsetting by 2d / m, which forms an mn-layer m-phase 2p-p pole lap-type coil winding. Here, m, k, p, and n are all natural numbers, and m≥3, k≥2, p≥1, and n≥1. 2) The core structure of each phase toothed coil consists of a surface core structure and an internal core structure. The surface core structure consists of the upper and lower surfaces, or the inner and outer surfaces of the core structure covering each phase toothed coil. The internal core structure consists of small tooth structure and large tooth structure, or consists entirely of small tooth structure. 3) The heat dissipation system structure is located in the concave tooth groove and / or convex tooth groove. The heat dissipation system structure includes heat dissipation groove, coolant inlet and outlet pipes and sealing structure. The coolant is connected to an external cooling system through the inlet and outlet pipes. After each phase toothed coil is rotated, or rotated nested, or offset, the heat dissipation groove is located above and / or below the adjacent phase toothed coil conductor. 4) The core structure and heat dissipation system structure are embedded in the same layer within the toothed coil structure of each phase. In the rotating motor, the included angle of the center line of the heat dissipation slot or the included angle of the center line of the heat dissipation slot with the center line of the adjacent concave or convex toothed wire is equal. In the linear motor, the distance between the center lines of adjacent heat dissipation slots or the distance between the center line of the heat dissipation slot and the center line of the adjacent concave or convex toothed wire is equal.

[0005] The integrated layered winding core structure and heat dissipation system are characterized in that the core structure includes a core structure formed by pressing thin silicon steel sheets and a core structure formed by die casting SMC soft magnetic composite material, wherein the core structure is provided with alternating fixing holes and / or heat dissipation pipes / holes.

[0006] The stacked winding core structure and heat dissipation system are integrated, characterized in that the heat dissipation system structure is provided with interphase heat dissipation pipe connection holes.

[0007] The stacked winding core structure and heat dissipation system are integrated, characterized in that the coolant in the heat dissipation system is pumped in by an external micro-pressure pump and extracted by negative pressure.

[0008] The stacked winding core structure and heat dissipation system are integrated, characterized in that the stacked winding is an axial magnetic flux coil winding, and the m-phase toothed coil winding core structure and heat dissipation system structure of the same size are stacked after each phase is rotated by a mechanical angle α in turn. The center lines of all heat dissipation grooves coincide with the center lines of concave or convex toothed conductors in the radial part.

[0009] The stacked winding core structure and heat dissipation system are integrated, characterized in that the stacked winding is a radial flux coil winding, and the m-phase toothed coil winding core structure and heat dissipation system structure with gradually decreasing radial radius are nested and stacked after each phase is rotated by a mechanical angle α. The radial projections of the center lines of all heat dissipation slots and the center lines of concave or convex toothed conductors converge at the central axis of the coil winding.

[0010] The stacked winding core structure and heat dissipation system are integrated, characterized in that the stacked winding is a linear motor coil winding, and the m-phase toothed coil winding core structure and heat dissipation system structure of the same size are stacked after each phase is offset by 2d / m, and the center line of all heat dissipation grooves coincides with the center line of the concave or convex toothed conductor in the radial part.

[0011] The base plane described in this invention is a reference plane common to all coil layers, or a projection plane perpendicular to the stacking direction, and the base point is a common reference point for all coil layer stacks / units.

[0012] The radially centripetal stacking described in this invention is a radial stacking with the central axis as a reference.

[0013] The stacked coil windings of this invention can be applied to axial flux motor systems, radial flux motor systems, linear motor systems, linear accelerator systems, magnetic levitation systems, magnetic bearing systems, magnetic stirring systems, etc.

[0014] Compared with the prior art, the present invention has the following advantages and technical effects: 1. In this invention, the core and heat dissipation system structure are nested inside each phase winding. After the winding is rotated and stacked, rotated and nested, or offset and stacked, the core structure, heat dissipation system structure, and each phase conductor form a sandwich structure, which can significantly improve the magnetic concentration performance of the winding.

[0015] 2. In this invention, the core and heat dissipation system structure are nested inside each phase winding. After the winding is rotated and stacked, rotated and nested, or offset and stacked, the core structure, heat dissipation system structure, and each phase conductor form a sandwich structure, which can significantly improve the heat dissipation performance of the winding.

[0016] 3. The core and heat dissipation system of this invention are nested inside each phase winding. After the windings are rotated, nested, or offset, they are fixed between layers, which can significantly improve the strength performance of the winding structure.

[0017] 4. The iron core and heat dissipation system structure of the present invention are nested inside each phase winding, forming an integral winding structure through a stacking method, which can significantly flatten and miniaturize the motor structure.

[0018] 5. The iron core and heat dissipation system structure of this invention use conventional motor parts, resulting in low material costs.

[0019] 6. The core and heat dissipation system structure of this invention is easy to mechanize and modularly expand, resulting in significant economies of scale. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a structure where the heat pipe is located inside the protruding teeth. Figure 2 for Figure 1 Schematic diagram of the 9-slot 6-pole winding structure formed after three-phase stacking.

[0021] Figure 3 A schematic diagram of a structure in which heat dissipation pipes are installed in both the convex and concave teeth; Figure 4 for Figure 3 Schematic diagram of the 9-slot 12-pole winding structure formed after three-phase stacking.

[0022] Figure 5 This is a schematic diagram of a structure where the heat pipe is located inside the concave teeth. Figure 6 A schematic diagram of a linear motor structure with heat dissipation pipes installed in both the convex and concave teeth. In the picture: 1001, indicating surface core structure; 1002, indicating large-tooth core structure; 1003, indicating small-tooth core structure; 1004, indicating core phase fixing holes; 2001, indicating heat dissipation groove structure; 2002, indicating coolant inlet and outlet pipes; 2003, indicating sealing structure; 2004, indicating heat dissipation pipe connection hole; 3010, indicating the input end of the first phase first layer conductor; 3011, indicating the output end of the first phase second layer conductor; 3020, indicating the input end of the second phase first layer conductor; 3021, indicating the output end of the second phase second layer conductor; 3030, indicating the input end of the third phase first layer conductor; 3031, indicating the output end of the third phase second layer conductor. Figure 1 , 3 When 5 is used as an axial flux winding structure, all schematic diagrams are top views of the planar structure.

[0023] Figure 1 , 3 When 5 is used as a radial flux winding structure, all schematic diagrams are shown as a top view of the center of the three-dimensional structure. The iron core and heat dissipation system are closely attached to the inside of the cylindrical winding. The salient pole position conductor is located in the upper part of the cylindrical conductor axis, and the concave tooth position conductor is located in the lower part of the cylindrical conductor axis. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1: Integration of 9-slot 6-pole winding core structure and heat dissipation system Appendix Figure 1 The toothed coil shown is a toothed coil with three teeth formed by a single conductor, and 3010 and 3011 are the electrical terminals of the conductor. This toothed coil is one phase coil of a cascaded winding. The iron core structure and heat dissipation system structure are embedded in the same layer of this phase coil. The conductor convex teeth are provided with a small tooth iron core structure 1003 and three heat dissipation slot structures 2001. The opening of the heat dissipation slot structure 2001 is in the inner ring of the planar winding or the lower part of the axial direction of the cylindrical winding. The included angle of the center line of the heat dissipation slot 2001 and the included angle between the center line of the heat dissipation slot 2001 and the center line of the conductor of the adjacent convex tooth slot are both 20°. The conductor concave tooth structure is a large tooth iron core structure 1002 formed by a single piece of stamping. Figure 1 The small image in the lower left corner is a scaled-down view of the surface core structure 1001 covering the entire toothed coil.

[0026] Appendix Figure 2 The following are three attachments. Figure 1The structure is rotated 40° sequentially to form a 9-slot, 6-pole winding. 3010 and 3011 are the first phase electrical terminals of the conductor, 3020 and 3021 are the second phase electrical terminals of the conductor, and 3030 and 3031 are the third phase electrical terminals of the conductor. After the three-phase iron core structure and heat dissipation structure are rotated and stacked, the nine heat dissipation slot structures 2001 are evenly distributed in the winding. The second phase winding conductor 3020 coincides with the center line projection of one of the slots of the first phase heat dissipation slot 2001 and the third phase heat dissipation slot 2001, forming an overall structure of iron core, heat dissipation slot, conductor, and iron core sandwiched together; the other two sides of each phase conductor are iron core structures.

[0027] Example 2: Integration of 9-slot 12-pole winding core structure and heat dissipation system Appendix Figure 3 The toothed coil shown is a toothed coil with three teeth formed by a single conductor, and 3010 and 3011 are the electrical terminals of the conductor. This toothed coil is one phase coil of a cascaded winding. The iron core structure and heat dissipation system structure are embedded in the same layer inside this phase coil. The conductor teeth are provided with a small tooth iron core structure 1003 and six heat dissipation slot structures 2001. The openings of the heat dissipation slot structures 2001 are in the inner and outer ring parts of the planar winding, or in the lower and upper parts of the cylindrical winding. The included angle of the center line of the heat dissipation slot 2001 and the included angle between the center line of the heat dissipation slot 2001 and the center line of the conductor of the adjacent tooth slot are both 20°. Figure 3 The small image in the lower left corner is a scaled-down view of the surface core structure 1001 covering the entire toothed coil.

[0028] Appendix Figure 4 The following are three attachments. Figure 3 The structure is rotated 20° sequentially to form a 9-slot, 12-pole winding. 3010 and 3011 are the first phase electrical terminals, 3020 and 3021 are the second phase electrical terminals, and 3030 and 3031 are the third phase electrical terminals. After the three-phase core structure and heat dissipation structure are rotated and stacked, 18 heat dissipation slot structures 2001 are evenly distributed on the winding. Nine heat dissipation slot structures 2001 have openings in the inner ring of the planar winding or the lower axial part of the cylindrical winding, and nine heat dissipation slot structures 2001 have openings in the outer ring of the planar winding or the upper axial part of the cylindrical winding. The winding conductors 3010, 3020, and 3030 coincide with the center line projection of the respective heat dissipation slots 2001, forming an overall structure of core, heat dissipation slots, conductors, and core sandwiched together. The other two sides of each phase conductor are core structures.

[0029] Example 3: Core structure formed by die casting of SMC soft magnetic composite material For the attached after rotational stacking Figure 4The intersection of the top and bottom views of each layer of the iron core is used to design a 3D model of the iron core structure based on the conductor thickness, heat dissipation groove height, heat dissipation groove opening, iron core fixing holes, and interphase heat dissipation pipe connection holes. Then, the iron core structure is die-cast using SMC soft magnetic composite material according to the 3D design.

[0030] Example 4: Integration of a core structure and heat dissipation system with heat pipes located within concave teeth. Appendix Figure 5 The toothed coil shown is a toothed coil with eight teeth formed by three wires, where 3010 and 3011 are the electrical terminals of the wires. This toothed coil is one phase coil of a cascaded winding. Within this phase coil, an iron core structure and a heat dissipation system structure are embedded in the same layer. The concave teeth of the wires contain a small-tooth iron core structure 1003 and eight heat dissipation slot structures 2001. The openings of the heat dissipation slot structures 2001 are located on the outer ring of the planar winding or the upper axial part of the cylindrical winding. The included angle of the center line of the heat dissipation slot 2001 and the included angle between the center line of the heat dissipation slot 2001 and the center line of the adjacent convex tooth wire are both 7.5°. The convex tooth structure contains a large-tooth iron core structure 1002 formed from a single piece of lamination. (The lower left small image is shown.) Figure 5 Enlarged view of area A, showing coolant inlet / outlet pipes 2002 and sealing structure 2003. This structure also includes heat dissipation pipe connection holes 2004 inside the heat dissipation slot 2001, and alternating iron core fixing holes 1004.

[0031] Example 5: Integration of Layered Linear Motor Core Structure and Heat Dissipation System Appendix Figure 6 Figure (a) shows the core structure and heat dissipation system integration of a single-phase double-layer toothed coil. When the electrical terminals 3010 and 3011 of the double-layer toothed coil are energized, they form an NS-structure magnetic field characteristic. The bottom and surface of the double-layer toothed coil are provided with surface core structures 1001. The upper and lower sides of the double-layer toothed coil exhibit interlayer concave-convex notches. Heat dissipation grooves 2001 are provided at 2d / m and 4d / m positions of each tooth structure. Coolant inlet and outlet pipes 2002 are provided within the interlayer notches of the heat dissipation groove 2001. Core structures 1003 are filled in the middle and on both sides of each heat dissipation groove. Figures (b) and (c) show the same core structure and heat dissipation system configuration as Figure (a).

[0032] Figure (d) shows the stacked linear motor windings formed by sequentially offsetting the three phases of Figures (a), (b), and (c) by 2d / m. Except at the ends, the projections of the center lines of all conductors after stacking overlap with the center line of the heat dissipation slot 2001, and the projections of all core structures 1003 overlap. The coolant inlet and outlet pipes 2002 are located on the upper and lower sides of the winding longitudinally. In practical applications, the upper coolant inlet and outlet pipes 2002 can be set as inlet pipes, with coolant pumped in at low pressure, and the lower coolant inlet and outlet pipes 2002 can be set as outlet pipes, with coolant extracted at negative pressure. The inlet pipes and outlet pipes are connected in parallel to connect to an external cooling system.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A layered winding core structure with an integrated heat dissipation system, characterized in that: 1) The lap-type winding is formed by lapping toothed coils. The number of winding phases is m, the number of pole pairs is p, the circumferential mechanical angle is α=2π / (pm), the number of toothed coils is k, the number of lapped toothed coils per phase is n, and the pole pitch is d. The lap-type toothed coils can be lapped by rotation, rotation nesting, or offset. Each phase of the m-phase toothed coil is lapped by rotating by an angle α or offset by 2d / m before lapping, which forms an mn-layer m-phase 2p-p pole lap-type coil winding. Here, m, k, p, and n are all natural numbers, and m≥3, k≥2, p≥1, and n≥1. 2) The core structure of each phase toothed coil consists of a surface core structure and an internal core structure. The surface core structure consists of the upper and lower surfaces, or the inner and outer surfaces of the core structure covering each phase toothed coil. The internal core structure consists of small tooth structure and large tooth structure, or is entirely composed of small tooth structure. 3) The heat dissipation system structure is located in the concave tooth groove and / or convex tooth groove. The heat dissipation system structure includes heat dissipation groove, coolant inlet and outlet pipes and sealing structure. Coolant is pumped into and extracted to the external cooling system through coolant inlet and outlet pipes. After each phase toothed coil is rotated, or rotated nested, or offset, the heat dissipation groove is located above and / or below the adjacent phase toothed coil conductor. 4) The core structure and heat dissipation system structure are embedded in the same layer within the toothed coil structure of each phase. In the rotating motor, the included angle of the center line of the heat dissipation slot or the included angle of the center line of the heat dissipation slot with the center line of the adjacent concave or convex toothed wire is equal. In the linear motor, the distance between the center lines of adjacent heat dissipation slots or the distance between the center line of the heat dissipation slot and the center line of the adjacent concave or convex toothed wire is equal.

2. The layered winding core structure of the integrated heat dissipation system according to claim 1, characterized in that... The core structure includes a core structure formed by pressing thin silicon steel sheets together and a core structure formed by die casting SMC soft magnetic composite material. The core structure is provided with alternating fixing holes and / or heat dissipation pipe connection holes.

3. The layered winding core structure of the integrated heat dissipation system according to claim 1, characterized in that... The heat dissipation system structure is equipped with interphase heat dissipation pipe connection holes.

4. The layered winding core structure of the integrated heat dissipation system according to claim 1, characterized in that... The coolant in the heat dissipation system is injected using an external micro-pressure pump and extracted using negative pressure.

5. The layered winding core structure of the integrated heat dissipation system according to claim 1, characterized in that... The stacked winding is an axial flux coil winding. The core structure and heat dissipation system structure of the m-phase toothed coil winding of the same size are stacked after each phase is rotated by a mechanical angle α. The center line of all heat dissipation slots coincides with the center line of the concave or convex toothed conductor in the radial part.

6. The layered winding core structure of the integrated heat dissipation system according to claim 1, characterized in that... The stacked winding is a radial flux coil winding. The core structure and heat dissipation system structure of the m-phase toothed coil winding with gradually decreasing radial radius are nested and stacked after each phase is rotated by a mechanical angle α. The radial projections of the center lines of all heat dissipation slots and the center lines of concave or convex toothed conductors converge at the central axis of the coil winding.

7. The layered winding core structure of the integrated heat dissipation system according to claim 1, characterized in that... The stacked winding is a linear motor coil winding. The core structure and heat dissipation system structure of the m-phase toothed coil winding of the same size are stacked after each phase is offset by 2d / m. The center line of all heat dissipation slots coincides with the center line of the concave or convex toothed conductor in the axial part.

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