Excitation type motor rotor
By designing the iron core structure of the limit slide and independent winding in the excitation motor rotor, the problems of low groove fullness and inflexible production of the existing excitation motor rotor are solved, and efficient winding and high-performance output are achieved.
Patent Information
- Application Number
- CN202323582853.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2033-12-27
AI Technical Summary
The current excitation motor has low fullness of rotor grooves, resulting in low motor performance, high price of winding equipment and inflexible production.
It adopts a structure including a rotating shaft and an iron core, and a limit slide is provided on the rotating shaft. The winding groove, yoke and pole shoe design of the iron core allows independent winding and multiple iron cores to wind simultaneously, improving efficiency and groove fullness.
Higher groove full rate and higher winding efficiency are achieved, reducing production costs, improving motor performance and production flexibility.
Smart Images
Figure CN222620756U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of motor technology, and in particular to an excitation motor rotor. Background Art
[0002] Currently, permanent magnet motors are widely used in new energy vehicles on the market, and rare earths are necessary materials for producing permanent magnets in motors. However, rare earth materials are non-renewable resources, and mining and processing are highly polluting, and the price of rare earths fluctuates greatly.
[0003] Compared with permanent magnet motors, excitation motors use energized coils to generate magnetic fields to replace permanent magnets. The strength of the magnetic field can be changed by adjusting the current, and the motor has no risk of demagnetization. In addition, the copper material commonly used in the coils is easy to process and has a relatively stable price. Excitation motors have great potential in the new energy vehicle market.
[0004] According to the principle of electromagnetism, the magnetic field strength generated by the winding of the iron core on the excitation motor is positively correlated with the current size and the number of winding turns, that is, the larger the current, the more turns, and the stronger the magnetic field strength. However, winding in the rotor core slots is more difficult, and it is difficult to achieve a high slot fill rate (the proportion of the conductor cross-section in the slot). In addition, the winding machine equipment is relatively expensive and the production cycle is slow. The equipment tooling, wiring and winding procedures are not universal for cores with different outer diameters, slot shapes and sizes. Each rotor core of different specifications needs to redevelop the process, and production is inflexible. In actual work, the rotor coil needs to be energized, and the rotor heats up inside, so cooling is required to ensure continuous high-performance output.
[0005] It is precisely because the excitation motors currently on the market generally have low winding slot fill rate and few turns in the slots that the motor performance is relatively low. Summary of the invention
[0006] The present application provides an excitation motor rotor, which can solve the problem of low motor performance in related technologies.
[0007] In order to solve the technical problem described in the background technology, the present application provides an excitation motor rotor, the excitation motor rotor comprising:
[0008] A rotating shaft, the rotating shaft comprising a rotating shaft body, the rotating shaft body being provided with a plurality of first limiting protrusions, the plurality of first limiting protrusions being arranged at intervals along the circumference of the rotating shaft body, a limiting slideway being formed between two adjacent first limiting protrusions, the first limiting protrusions and the limiting slideway both extending along the axial direction of the rotating shaft;
[0009] A plurality of iron cores, the iron cores comprising a winding groove portion, a yoke portion and a pole shoe; the groove width direction of the winding groove portion extends along the radial direction of the rotating shaft, and the groove length direction extends along the axial direction of the rotating shaft, the yoke portion and the pole shoe are respectively located at the first end and the second end of the winding groove portion opposite to each other, and the first end and the second end of the winding groove portion are two opposite ends of the winding groove portion in the radial direction of the rotating shaft;
[0010] The yoke of each iron core is correspondingly slidably connected in the limiting slideway.
[0011] Optionally, the yoke of the core includes a first limit yoke and a second limit yoke, and the second limit yoke is located on a side of the first limit yoke away from the pole shoe;
[0012] The first limiting yoke includes a yoke edge portion extending toward both sides along the circumference of the rotating shaft at the first end of the winding groove portion;
[0013] The second limiting yoke extends radially inwardly along the rotating shaft; the second limiting yoke is slidably connected in the limiting slideway.
[0014] Optionally, two axial ends of the protruding side of the first limiting protrusion respectively form limiting protrusion edges;
[0015] The first limiting groove is formed between the second limiting yoke and two yoke edges of the first limiting yoke;
[0016] The first limiting groove is engaged with the limiting convex edge.
[0017] Optionally, the yoke edge portion includes a first side surface away from the pole shoe, the second limiting yoke includes a second side surface, and the first side surface intersects with the second side surface to form a first limiting groove.
[0018] Optionally, the angle formed by the intersection of the first side surface and the second side surface to form a first limiting groove is an acute angle, and the shape of the first limiting groove is a dovetail groove;
[0019] The first side surface and the second side surface are both inclined toward one side of the second limiting yoke;
[0020] The shape of the limiting protrusion is a dovetail protrusion that meshes with the shape of the first limiting groove.
[0021] Optionally, the iron core is a symmetrical structure, and the symmetry plane includes a plane passing through the axial direction of the rotating shaft and the extension direction of the slot width of the winding slot portion.
[0022] Optionally, the yoke edge portion also includes a third side surface close to the pole shoe, and the third side surface is a curved surface.
[0023] Optionally, the yoke edge portion further includes fourth side surfaces located on both sides of the extending direction of the yoke edge portion;
[0024] The fourth side surfaces of the yoke edges of two adjacent iron cores are in contact and fit with each other.
[0025] Optionally, a refrigerant port is provided on the first limiting protrusion, and the refrigerant port is connected to a refrigerant channel in the rotating shaft;
[0026] A refrigerant drainage groove is provided on the iron core corresponding to the refrigerant port position;
[0027] The refrigerant drainage grooves on the yokes of two adjacent cores are closed to form a refrigerant drainage channel.
[0028] Optionally, the outer surface of the pole shoe away from the yoke is an outwardly convex arc surface.
[0029] Optionally, the number of blocks of the iron core is an even number, and the number of the first limiting protrusions and the number of the limiting slideways are consistent with the number of blocks of the iron core;
[0030] The iron cores of an even number are arranged opposite to each other in pairs on the circumferential surface of the rotating shaft body.
[0031] Optionally, a winding bracket is provided on the surface of the winding groove portion, and the winding bracket includes a plurality of fixing grooves for guiding the coil to be fixed.
[0032] Optionally, a coil winding is wound on the winding groove portion;
[0033] A gap is formed between the coil windings on two adjacent cores;
[0034] A wedge is provided at the opening of the gap, and the wedge closes the gap to form a closed space.
[0035] Optionally, the coil winding is in a pagoda shape, and the winding thickness of the coil winding gradually decreases from a position close to the pole shoe to a position close to the yoke.
[0036] Optionally, the excitation motor rotor further includes a busbar, and the busbar is sleeved outside the shaft body at both ends of the first limiting protrusion along the axial extension direction.
[0037] Due to the use of the iron core and shaft structure shown in the present application, when using a winding machine to wind the winding groove portion of the iron core, the iron core can be removed from the shaft first and the iron core can be wound separately, allowing multiple iron cores to be wound at the same time. Compared with the one-piece motor rotor that can only use flying fork type and wire nozzle type winding, the efficiency is improved and a higher slot fill rate is achieved. BRIEF DESCRIPTION OF THE DRAWINGS
[0038] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0039] Figure 1 A schematic diagram of the rotor structure of an excitation motor provided in an embodiment of the present application is shown;
[0040] Figure 2 Shows Figure 1 A schematic diagram of a radial cross-sectional structure of the structure shown;
[0041] Figure 3 A schematic diagram of the structure of a rotor of an excitation motor provided by an embodiment of the present application and equipped with an iron core is shown;
[0042] Figure 4 Shows Figure 1 A schematic diagram of a top view structure;
[0043] Figure 5 Shows Figures 1 to 4 A schematic diagram of the rotating shaft structure in the illustrated embodiment;
[0044] Figure 6 Shows Figure 5 A schematic diagram of a top view structure;
[0045] Figure 7 A schematic diagram of the core structure provided by an embodiment of the present application is shown;
[0046] Figure 8 Shows Figure 7 A schematic diagram of a top view structure;
[0047] Fig. 9 Shows Figure 7 A side view structural schematic diagram of;
[0048] Fig.10 A schematic diagram of the top view of the iron core provided by the second embodiment is shown;
[0049] Fig.11 A schematic diagram of the structure of the iron core provided by the third embodiment is shown;
[0050] Fig.12 Shows Fig.11 A schematic diagram of a top view structure;
[0051] Fig.13 Shows Figure 1 A schematic diagram of the structure of the embodiment shown in the top view;
[0052] Fig.14 A schematic diagram of the structure of the iron core provided by the fourth embodiment of the present application is shown;
[0053] Fig.15 Shows Fig.14 A side view structural schematic diagram of;
[0054] Fig.16 Shows Fig.14 A schematic diagram of a top view structure;
[0055] Fig.17 A schematic diagram of the structure after the iron core provided by an embodiment of the present application is wound with a coil winding is shown;
[0056] Fig.18 Shows Fig.17 Schematic diagram of the three-dimensional structure from the left perspective;
[0057] Fig.19 Shows Fig.17 and Fig.18 A schematic diagram of a top view structure;
[0058] Fig. 20 The enlarged structural schematic diagram of the rotor busbar portion of the excitation type motor provided by the present application is shown;
[0059] Fig.21 A schematic diagram showing the flow of coolant in the rotor of the excitation motor provided by the present application is shown. DETAILED DESCRIPTION
[0060] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0061] In the description of the present application, it should be noted that the description of the orientation or positional relationship indicated by "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like in the present embodiment is only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. Therefore, it cannot be understood as a limitation to the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0062] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, fixed installation, or a detachable connection, detachable installation, or an integral connection, an integral installation; it can be a mechanical connection or an electrical connection, wherein the electrical connection can include any one or a combination of two of a power drive connection and a communication connection; it can be a direct connection, a direct installation, or an indirect connection or indirect installation through an intermediate medium, or it can be the internal connection of two elements, which can be a wireless connection or a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0063] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.
[0064] Figure 1 A schematic diagram of the rotor structure of an excitation motor provided in an embodiment of the present application is shown. Figure 2 Shows Figure 1 Schematic diagram of the radial cross-sectional structure of the structure shown. Figure 3 A schematic diagram of the structure of an excitation motor rotor with an iron core provided in an embodiment of the present application is shown. Figure 4 Shows Figure 3 Schematic diagram of the top view structure.
[0065] from Figures 1 to 4 In particular Figure 3 As can be seen from the figure, the excitation motor rotor includes a rotating shaft 100 and an iron core 200 .
[0066] The rotating shaft 100 has an axial direction A, a radial direction B and a circumferential direction C, wherein the axial direction A is the extension direction of the central axis of the rotating shaft 100 , the radial direction B is the diameter direction of the rotating shaft 100 , and the circumferential direction C is the circumferential direction of the rotating shaft 100 .
[0067] Figure 5 Shows Figures 1 to 4 The schematic diagram of the rotating shaft structure in the embodiment shown, Figure 6 Shows Figure 5 A top view of the structure, from Figure 5 and Figure 6It can be seen that the shaft 100 includes a shaft body 110, on which a plurality of first limiting protrusions 111 are provided. In this embodiment, there are eight first limiting protrusions 111, and in other embodiments, the first limiting protrusions 111 may be other even numbers. The plurality of first limiting protrusions 111 are arranged at intervals along the circumference of the shaft body 110, and a limiting slideway 112 is formed between two adjacent first limiting protrusions 111. Both the first limiting protrusions 111 and the limiting slideway 112 extend along the axial direction A of the shaft 100; limiting convex edges 113 are formed at the circumferential ends of the protruding side of the first limiting protrusion 111.
[0068] Figure 7 FIG. 1 shows a schematic diagram of the core structure provided by an embodiment of the present application. Figure 8 Shows Figure 7 A top view of the structure. Fig. 9 Shows Figure 7 Schematic diagram of the side structure.
[0069] Combination Figure 3 , Figure 7 , Figure 8 and Fig. 9 It can be seen that the iron core 200 includes a winding groove portion 210, a yoke portion 220 and a pole shoe 230; the groove width direction of the winding groove portion 210 extends along the radial direction B of the rotating shaft 100, and the groove length direction extends along the axial direction A of the rotating shaft 100, the yoke portion 220 and the pole shoe 230 are respectively located at the first end 211 and the second end 212 of the winding groove portion 210 opposite to each other in the groove width direction, and the yoke portion 220 and the pole shoe 230 respectively extend along the groove length direction of the winding groove portion 210.
[0070] Exemplarily, the number of iron cores 200 is an even number, the number of the first limiting protrusions 111 and the number of the limiting slideways 112 are consistent with the number of iron cores 200; the iron cores 200 of an even number are arranged opposite to each other in pairs on the circumference of the shaft body 110. In this embodiment, the number of iron cores 200 is eight.
[0071] The yoke 220 of each of the iron cores 200 is correspondingly slidably connected in the limiting slideway 112 , and the yoke 220 of the iron core 200 forms a first limiting groove 223 , which is engaged with the limiting convex edge 113 .
[0072] It can be understood that the limiting protrusion 113 engages with the first limiting groove 223 to limit the movement of the iron core 200 in the circumferential direction C and the radial direction B. The iron core 200 can still slide along the axial direction A to connect to the limiting protrusion 113 or be removed from the limiting slide 112.
[0073] When in use, a coil winding is wound around the winding groove 210 and the coil winding is energized, so that each iron core 200 forms a single pole, and a magnetic field is formed between the two opposite pole shoes 230 on the shaft 100. The excitation motor rotor rotates along the circumferential direction C of the shaft 100 during operation.
[0074] Due to the use of the excitation motor rotor structure described in the present application, when using a winding machine to wind the winding groove 210 of the iron core 200, the iron core 200 can be removed from the rotating shaft 100 and the iron core 200 can be wound separately, allowing multiple iron cores 200 to be wound at the same time. Compared with the integrated motor rotor that can only be wound with a flying fork and a wire nozzle, the excitation motor rotor provided by the present application can improve the winding efficiency and achieve a higher slot fill rate.
[0075] Continue to refer to Figure 7 , Figure 8 and Fig. 9 The yoke 220 of the core 200 includes a first limiting yoke 221 and a second limiting yoke 222 , wherein the second limiting yoke 222 is located on a side of the first limiting yoke 221 away from the pole shoe 230 .
[0076] The first limiting yoke 221 includes a yoke edge portion 2211 extending toward both sides along the circumferential direction C of the rotating shaft 100 at the first end 211 of the winding groove portion 210 .
[0077] The second limiting yoke 222 extends inwardly along the radial direction B of the rotating shaft 100 .
[0078] The first limiting groove 223 is formed between the second limiting yoke 222 and the two yoke edges 2211 of the first limiting yoke 221 .
[0079] In this implementation, Figures 7 to 9 After the iron core shown is installed on the rotating shaft, when the rotating shaft 100 rotates and the iron core 200 is driven to rotate by applying torque to the first limit yoke 221 and the second limit yoke 222, the iron core 200 will have a centrifugal tendency. The first limit yoke 221 and the second limit yoke 222 apply a reaction force to the limit convex edge 113 of the rotating shaft 100 to limit the centrifugal movement of the iron core 200, thereby improving the stability of the iron core 200 during rotation.
[0080] Continue to refer to Figure 7 , Figure 8 and Fig. 9 The yoke edge 2211 includes a first side surface 241 away from the pole shoe 230 , the second limiting yoke 222 includes a second side surface 242 , and the first side surface 241 and the second side surface 242 intersect to form the first limiting groove 223 .
[0081] The included angle between the first side surface 241 and the second side surface 242 to form the first limiting groove 223 is an acute angle, and the shape of the first limiting groove 223 is a dovetail groove.
[0082] The first side surface 241 and the second side surface 242 are both inclined toward one side of the second limiting yoke 222 .
[0083] The shape of the limiting protrusion 113 is a dovetail protrusion that meshes with the shape of the first limiting groove 223 .
[0084] It can be understood that the first side surface 241 and the second side surface 242 are the force-bearing surfaces when the rotating shaft 100 drives the iron core 200 to rotate. The first side surface 241 and the second side surface 242 inclined toward one side of the second limit yoke 222 can disperse and reduce the force applied to the first side surface 241 and the second side surface 242 by the limit flange 113 of the rotating shaft 100, thereby reducing the wear between the limit flange 113 of the rotating shaft 100 and the yoke 220 of the iron core 200.
[0085] Continue to refer to Figure 7 , Figure 8 and Fig. 9 It can be seen that the iron core 200 is a symmetrical structure, and the symmetry plane 400 includes a plane passing through the axial direction A of the shaft 100 and the extending direction of the slot width of the winding slot 210. The symmetrical structure of each iron core 200 can enable the adjacent two iron cores 200 to support and cooperate after multiple iron cores 200 are installed on the shaft 100, thereby improving the overall stability of the iron core 200.
[0086] Continue to refer to Figure 7 , Figure 8 and Fig. 9 The yoke edge 2211 further includes a third side surface 243 close to the pole shoe 230, and the third side surface 243 is an arc surface. It can be understood that the arc surface of the third side surface 243 can guide the winding direction during the winding process and improve the winding efficiency.
[0087] Continue to refer to Figure 7 and Figure 8 A second limiting groove 224 opening radially inward is provided on the second limiting yoke 222. Correspondingly, a second limiting protrusion corresponding to the second limiting groove 224 is provided on the bottom surface of the limiting slideway 112 of the rotating shaft 100. After the iron core 200 is installed on the rotating shaft, the second limiting groove 224 is meshed with the second limiting protrusion. The meshing second limiting groove 224 and the second limiting protrusion can disperse the stress exerted on the first limiting groove 223 due to high-speed rotation.
[0088] In other embodiments, the second limiting yoke 222 may not be provided with the second limiting groove 224. Fig.10, which shows a schematic diagram of the top view of the iron core provided by the second embodiment, from Fig.10 It can be seen from the figure that the second limiting groove 224 is not provided on the second limiting yoke 222 .
[0089] Fig.11 FIG. 4 shows a schematic diagram of the core structure provided by the third embodiment. Fig.12 Shows Fig.11 A top view of the structure. Fig.11 and Fig.12 It can be seen that in Figures 7 to 10 Based on the core structure of the embodiment shown, the second limiting yoke 222 is further formed with a third limiting groove 225, which is located on both sides of the circumferential direction of the second limiting yoke 222. Exemplarily, the third limiting groove 225 is a dovetail groove with the same shape as the first limiting groove 223.
[0090] Correspondingly, the side of the limiting slide 112 of the rotating shaft 100 is provided with a third limiting protrusion corresponding to the third limiting groove 225. After the iron core 200 is installed on the rotating shaft 100, the third limiting groove 225 is meshed with the third limiting protrusion accordingly. The meshing third limiting groove 225 and the third limiting protrusion can disperse the stress exerted on the first limiting groove 223 due to high-speed rotation.
[0091] Fig.13 Shows Figure 1 The schematic diagram of the top view of the embodiment shown in FIG. Figure 8 and 13 It can be seen that the yoke edge portion 2211 further includes fourth side surfaces 244 located on both sides of the yoke edge portion extending direction; the fourth side surfaces 244 of the yoke edge portions 2211 of two adjacent iron cores 200 are in contact and fit.
[0092] After the coil winding of the excitation motor rotor described in the present application is energized, each iron core 200 forms a single magnetic pole, and the magnetic properties of two adjacent iron cores 200 on the rotating shaft 100 are opposite. The contact and matching of the fourth side surfaces 244 of the yoke edges 2211 of the two adjacent iron cores 200 can, on the one hand, enable the two adjacent iron cores 200 to support each other and improve the stability of the motor rotor. On the other hand, the magnetic field force between the two adjacent magnets 200 can increase the overall damping of the iron core 200, improve the stability of the motor rotor, and reduce the vibration of the iron core 200.
[0093] Reference Figures 1 to 13 In any of the figures, the outer surface of the pole shoe 230 away from the yoke 220 is an outer convex arc surface. Because the outer surface of the pole shoe 230 is an outer convex arc surface, the outer surfaces of the two opposite pole shoes 230 on the rotating shaft 100 form a parenthesis shape, thereby increasing the magnetic flux between the two opposite iron cores 200, enhancing the electric field, and facilitating the high-performance output of the motor rotor.
[0094] Fig.14 FIG. 4 shows a schematic diagram of the core structure provided by the fourth embodiment of the present application. Fig.15 Shows Fig.14 A side view of the structure, Fig.16 Shows Fig.14 A top view of the structure. Fig.14 and Fig.16 The core embodiment shown is in Figure 7 and Fig.12 On the basis of the embodiment shown, a winding bracket 300 is provided on the surface of the winding groove 210, and the winding bracket 300 includes a plurality of fixed grooves arranged in parallel for guiding the coil to be fixed. When winding the coil, the wire is wound according to the path of the fixed groove. The winding bracket 300 is provided between the first end 211 and the second end 212 of the winding groove 210.
[0095] Continue to refer to Figure 3 and Figure 5 , a refrigerant port 600 is provided on the first limiting protrusion 111, and the refrigerant port 600 is connected to the refrigerant channel in the rotating shaft 100; Figure 3 , Fig. 9 , Fig.11 , Fig.14 and Fig.15 As shown, a refrigerant drainage groove 500 is provided on the iron core 200 corresponding to the position of the refrigerant port 600; the refrigerant drainage grooves 500 on the yokes 220 of two adjacent iron cores 200 are closed to form a refrigerant drainage channel. Preferably, the refrigerant port 600 is located in the middle of the first limiting protrusion 111. In other embodiments, a plurality of refrigerant ports 600 and refrigerant drainage grooves 500 may be provided correspondingly.
[0096] The one-piece rotor in the related art is processed with a refrigerant port and a refrigerant drainage groove in the middle as shown in the present application, so that the coolant can only flow in from one end of the iron core 200 in the axial direction A and flow out from the other end of the iron core 200 in the axial direction A. Since the coolant immediately cools the winding after entering the rotor, the temperature of the coolant rises significantly when it reaches the outflow end, even higher than the original temperature of the winding, which will lead to a higher winding temperature at the outflow end, that is, the cooling effect at the outflow end is poor.
[0097] Fig.21 The schematic diagram of the flow of the cooling liquid in the excitation motor rotor provided by the present application is shown. Fig.21It can be seen that the coolant flows in the refrigerant channel of the rotating shaft 100, and flows from the refrigerant port 600 into the refrigerant drainage channel formed by the yokes 220 of the two adjacent cores 200, and then flows from the refrigerant drainage channel into the refrigerant drainage grooves 500 on each core 200. At the same time, during the rotation of the core 200, the refrigerant flows from the refrigerant drainage grooves 500 along the axial direction A toward the two end faces of the core 200, so that the cooling effect of the two end faces of the axial direction A of the core 200 is consistent, thereby improving the cooling uniformity and avoiding the problem of excessive temperature at the outflow end.
[0098] Fig.17 The schematic diagram of the structure of the iron core after being wound with the coil winding provided in one embodiment of the present application is shown. Fig.18 Shows Fig.17 Schematic diagram of the three-dimensional structure from the left perspective. Fig.19 Shows Fig.17 and Fig.18 A top view of the structure, from Figures 17 to 19 It can be seen that the coil winding 700 is wound on the wire slot portion 210 of the iron core 200. Exemplarily, the coil winding 700 is in a pagoda shape, and the winding thickness of the coil winding 700 gradually decreases from the position close to the pole shoe 230 to the position close to the yoke 220.
[0099] Combination Figure 2 Fig.13 It can be seen that a gap 800 is formed between the coil windings 700 on two adjacent iron cores 200 ; a wedge block 900 is plugged at the opening of the gap 800 , and the wedge block 900 closes the gap 800 to form a closed space.
[0100] After the iron core 200 is installed in place, the distance between two adjacent iron cores 200 gradually decreases from the outside to the inside. Therefore, the pagoda-shaped coil winding 700 can avoid the coil winding 700 of adjacent iron cores 200 from contacting to cause interference. At the same time, a gap 800 is formed between the coil windings 700. When the wedge block 900 is closed, the gap 800 forms a closed space, so that the coolant can flow in the closed space to fully cool the coil winding 700.
[0101] Continue to refer to Figure 1 and Figure 3 The excitation motor rotor further includes a busbar 250 , and the busbar 250 is sleeved outside the shaft body 110 at both ends of the first limiting protrusion 111 along the axial A extension direction.
[0102] The inlet and outlet ends of the coil winding 700 may be connected to the busbar 250 by riveting, welding or other electrical connection methods.
[0103] Fig. 20The enlarged structural diagram of the rotor busbar of the excitation motor provided by the present application is shown. Fig. 20 As can be seen in the figure, the busbar 250 is provided with a connecting fork 251, through which the incoming and outgoing terminals of the coil winding 700 are connected. The busbar 250 also serves as an axial limit for the iron core 200, so that the iron core 200 is fixed in the axial direction A after the busbar 250 is installed, thereby improving the stability of the rotor during rotation.
[0104] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection created by this application.
Claims
1. A field excitation motor rotor, characterized in that: The excitation motor rotor comprises: A rotating shaft, the rotating shaft comprising a rotating shaft body, the rotating shaft body being provided with a plurality of first limiting protrusions, the plurality of first limiting protrusions being arranged at intervals along the circumference of the rotating shaft body, a limiting slideway being formed between two adjacent first limiting protrusions, the first limiting protrusions and the limiting slideway both extending along the axial direction of the rotating shaft; A plurality of iron cores, each of which comprises a winding slot portion, a yoke portion and a pole shoe; the slot width direction of the winding slot portion extends along the radial direction of the rotating shaft, and the yoke portion and the pole shoe are respectively located at a first end and a second end of the winding slot portion opposite to each other in the slot width direction; The yoke of each iron core is correspondingly slidably connected in the limiting slideway.
2. The excitation motor rotor according to claim 1, characterized in that: The yoke of the core comprises a first limiting yoke and a second limiting yoke, wherein the second limiting yoke is located on a side of the first limiting yoke away from the pole shoe; The first limiting yoke includes a yoke edge portion extending toward both sides along the circumference of the rotating shaft at the first end of the winding groove portion; The second limiting yoke extends radially inwardly along the rotating shaft; the second limiting yoke is slidably connected in the limiting slideway.
3. The excitation motor rotor according to claim 2, characterized in that: The two axial ends of the protruding side of the first limiting protrusion are respectively formed with limiting protrusion edges; A first limiting groove is formed between the second limiting yoke and two yoke edges of the first limiting yoke; The first limiting groove is engaged with the limiting convex edge.
4. The excitation motor rotor according to claim 3, characterized in that: The yoke edge portion includes a first side surface away from the pole shoe, the second limiting yoke includes a second side surface, and the first side surface intersects with the second side surface to form a first limiting groove.
5. The excitation motor rotor according to claim 4, characterized in that: The angle between the first side surface and the second side surface to form a first limiting groove is an acute angle, and the shape of the first limiting groove is a dovetail groove; The first side surface and the second side surface are both inclined toward one side of the second limiting yoke; The shape of the limiting protrusion is a dovetail protrusion that meshes with the shape of the first limiting groove.
6. The excitation motor rotor according to claim 1, characterized in that: The iron core has a symmetrical structure, and the symmetry plane includes a plane passing through the axial direction of the rotating shaft and the extending direction of the groove width of the winding groove portion.
7. The excitation motor rotor according to claim 2, characterized in that: The yoke edge portion also includes a third side surface close to the pole shoe, and the third side surface is a curved surface.
8. The excitation motor rotor according to claim 2, characterized in that: The yoke edge portion further includes fourth side surfaces located on both sides of the yoke edge portion in the extending direction; The fourth side surfaces of the yoke edges of two adjacent iron cores are in contact and fit with each other.
9. The excitation motor rotor according to claim 1, characterized in that: A refrigerant port is provided on the first limiting protrusion, and the refrigerant port is connected to the refrigerant channel in the rotating shaft; A refrigerant drainage groove is provided on the iron core corresponding to the refrigerant port position; The refrigerant drainage grooves on the yokes of two adjacent cores are closed to form a refrigerant drainage channel.
10. The excitation motor rotor according to claim 1, characterized in that: The outer surface of the pole shoe away from the yoke is an outwardly convex arc surface.
11. The excitation motor rotor according to claim 1, characterized in that: The number of blocks of the iron core is an even number, and the number of the first limiting protrusions and the number of the limiting slideways are consistent with the number of blocks of the iron core; The iron cores of an even number are arranged opposite to each other in pairs on the circumferential surface of the rotating shaft body.
12. The excitation motor rotor according to claim 1, characterized in that: A winding bracket is provided on the surface of the winding groove portion, and the winding bracket includes a plurality of fixing grooves for guiding the coil to be fixed.
13. The excitation motor rotor according to claim 1, characterized in that: The winding groove portion is wound with a coil winding; A gap is formed between the coil windings on two adjacent cores; A wedge is provided at the opening of the gap, and the wedge closes the gap to form a closed space.
14. The excitation motor rotor according to claim 13, characterized in that: The coil winding is in a pagoda shape, and the winding thickness of the coil winding gradually decreases from a position close to the pole shoe to a position close to the yoke.
15. The excitation motor rotor according to claim 1, characterized in that: The excitation motor rotor further includes a busbar, which is sleeved outside the rotating shaft body at two ends of the first limiting protrusion along the axial extension direction.