Water-cooled biaxial-biradial mixed magnetic flux hub motor

Abstract

The invention provides a water-cooled biaxial-biradial hybrid magnetic flux hub motor which comprises an arc-shaped silicon steel lamination, a cross-shaped block iron core, four rotors, an exciting winding, a straight cooling water channel, a straight cooling fin, four stator brackets and a main shaft, wherein the cross-shaped block iron core is of an axial-radial arc-shaped silicon steel lamination structure; and the plurality of cross-shaped block iron cores are combined into a biaxial-biradial four-stator iron core along the circumferential direction. The four-stator iron core is provided with a biaxial excitation winding, and the biaxial excitation winding provides four-stator mixed magnetic flux. Direct cooling water channels are arranged in the middles of the four stator iron cores, and direct cooling fins are arranged among the exciting windings and are of a heat conduction carbon fiber composite material structure. And the four-stator bracket adopts a carbon fiber composite material structure, is arranged between the radial left inner rotor and the radial right inner rotor, and is fixedly connected with the main shaft. By using the water-cooled biaxial-biradial mixed magnetic flux hub motor, the power density can be improved, and the heat dissipation effect can be enhanced.

Description

TECHNICAL FIELD

[0001] The application relates to an axial-radial hybrid flux motor in the technical field of electric machines, in particular to a water-cooled double-axial-double-radial hybrid flux wheel hub motor. BACKGROUND

[0002] Conventional wheel hub motors all adopt radial flux or axial flux structures, and the motor stator core, excitation winding and cooling system occupy a large space, so that the power density and efficiency are affected. The new axial-radial hybrid flux wheel hub motor has the advantages of high power density, good acceleration performance and low manufacturing cost, so that the axial-radial hybrid flux wheel hub motor is becoming one of the key development projects in the field of new energy vehicles and will be widely applied.

[0003] The concentrated short-pitch winding of the axial flux motor can effectively reduce current consumption and has a wider speed regulation range. The axial-radial hybrid flux wheel hub motor can not only retain the advantages of the axial flux motor, but also can improve the torque and dynamic stability through the optimization design of the axial-radial hybrid flux structure.

[0004] The wheel hub motor has large output power and heat accumulation, which reduces the efficiency of the motor. The stator core heat dissipation is usually arranged in the flow channel in the shell, and the heat is transferred to the shell through the stator core and then taken away by the cooling water, so that the heat dissipation is poor. The direct water cooling structure allows the cooling water to directly contact the stator core, so that the heat dissipation effect of the stator core can be improved. The direct cooling structure of the excitation winding is provided with fins between the motor windings, the fins are internally provided with a cooling water channel, the heat transfer path is shortened, the winding heat dissipation area is increased, and the heat dissipation efficiency is improved.

[0005] Carbon fiber composite materials have excellent performance, high strength, light weight, high temperature resistance, heat conduction and corrosion resistance, among which carbon fiber polyether ether ketone composite materials are more economical and practical, and the heat conduction direction of the heat conduction pitch-based carbon fiber-resin composite material can reach 740 W / (m·K), which is much higher than that of aluminum alloy 219 W / (m·K). The carbon fiber composite material applied to the wheel hub motor can improve the overall strength and heat dissipation performance.

[0006] Chinese patents CN 114977704 A, CN 118826411 A and CN 110120716 A provide several motor schemes of axial-radial hybrid flux and cooling.

[0007] CN 114977704 A provides a high integration space magnetic field type wheel hub motor, the stator features include core lamination combination mode, armature winding layout mode, the rotor features include rotor core distribution, permanent magnet configuration and magnetization mode, the heat dissipation system includes water channel structure to realize the heat exchange between the motor and the outside. The motor fully utilizes the axial radial magnetic field space, has high integration, improves the utilization rate of permanent magnet, is easy to ensure high power / torque density, and is suitable for new energy vehicles. However, the motor topology space utilization rate is still insufficient.

[0008] CN 118826411 A is a kind of axial-radial flux hybrid three rotor permanent magnet synchronous motor, the three rotor permanent magnet synchronous motor combines the axial flux motor with the inner rotor radial flux motor, independently winds the composite U-shaped winding on the stator core, cancels the inner side end portion of the original axial flux motor winding, changes the axial conductor to provide current excitation for radial motor, reduces the motor winding loss, fully utilizes the internal space of wheel hub, improves the overall output torque density of motor. However, the torque density of the motor can be further improved.

[0009] CN 110120716 A discloses a combined array type outer rotor axial-radial hybrid flux permanent magnet motor, a T-shaped split core is made of soft magnetic composite material by powder metallurgy method, the T-shaped split core has two axial stator teeth and a radial stator tooth in the middle, and the two axial coils and the radial coil in the middle are respectively wound by distributed winding; tangential magnetization concentric fan-shaped permanent magnets and filled soft magnetic materials are alternately formed. The application can improve the utilization rate of winding end, improve the torque quality, improve the torque and power density, and improve the overall operating efficiency of the motor. However, the saturation magnetic induction intensity of the motor is low.

[0010] On the basis of the above technology, the present application utilizes axial-radial circular arc silicon steel laminations, double axial excitation windings and direct water cooling structure to design a water-cooled double axial-double radial hybrid flux wheel hub motor, which can improve torque density and efficiency and enhance heat dissipation performance. SUMMARY

[0011] The present application aims at:

[0012] The application discloses a water-cooled double-axial-double-radial hybrid flux wheel motor, which comprises a circular arc silicon steel sheet, a T-shaped split core, a double-axial excitation winding, four rotors, a straight cooling water channel, a cooling water jacket, a straight cooling fin, a carbon fiber composite structure and four stator supports, wherein the T-shaped split core is arranged in the axial-radial circular arc silicon steel sheet structure, and a plurality of T-shaped split cores are combined into a double-axial-double-radial four-stator core in the circumferential direction; the double-axial excitation winding is arranged on the four-stator core and provides double-axial-double-radial hybrid flux; the straight cooling water channel is arranged in the middle of the four-stator core, the cooling water jacket is arranged on the outer ring of the double-axial excitation winding, the straight cooling fin is arranged between the excitation windings, the cooling water jacket and the straight cooling fin are arranged by using heat-conducting pitch-based carbon fiber and resin composite material, the four-stator core is fixed by using carbon fiber polyether ether ketone composite material structure and the four-stator supports are arranged, the four-stator supports are arranged between the left and right inner rotors in the radial direction and are fixed to the main shaft.

[0013] The application has the following beneficial effects:

[0014] 1. The double-axial-double-radial hybrid flux structure has compact topological structure, high torque density and good dynamic performance.

[0015] 2. The axial-radial arc silicon steel sheet structure can reduce magnetic resistance and stator core loss.

[0016] 3. The double-axial concentrated excitation winding structure can reduce current consumption and has a wider speed regulation range.

[0017] 4. The straight cooling fin and the cooling water jacket arranged by using the heat-conducting pitch-based carbon fiber composite material structure can effectively improve the heat dissipation effect of the excitation winding.

[0018] 5. The straight cooling water channel arranged in the middle of the four-stator core can improve the heat dissipation effect of the four-stator core.

[0019] 6. The four-stator supports arranged by using the carbon fiber polyether ether ketone composite material structure and fixed to the four-stator core and the supports have the advantages of high connection strength and good dynamic performance.

[0020] To solve the above technical problems, the application provides the following technical scheme:

[0021] The application discloses a water-cooled double-axial-double-radial hybrid flux wheel motor, which comprises an axial-radial circular arc silicon steel sheet, a T-shaped split core, four stators, double-axial excitation windings, a radial inner rotor, an outer rotor, straight cooling water channels, a cooling water jacket, straight cooling fins, liquid cooling water channels, four stator supports and a main shaft; the T-shaped split core is arranged in the axial-radial circular arc silicon steel sheet structure, and a plurality of T-shaped split cores are combined into a four-stator core in a circumferential direction; the double-axial excitation windings are arranged on the four-stator core and provide hybrid flux for the four stators; the straight cooling water channels are arranged in the middle of the four-stator core, the excitation windings are provided with the straight cooling fins, the straight cooling fins are made of a heat-conducting pitch-based carbon fiber and a resin composite material structure; the four-stator supports are made of a carbon fiber polyether ether ketone composite material structure, the radial inner rotor is provided with left and right radial inner rotors, the four-stator supports are arranged between the left and right radial inner rotors and are fixed to the main shaft; the four-stator supports are provided with water inlet pipes and water outlet pipes, and the water inlet pipes and the water outlet pipes are connected to water inlets and water outlets of the main shaft respectively; the four-stator core is arranged in an axial-radial communication structure, and the four stators and the four rotors are arranged in a double-axial-double-radial hybrid flux loop. The double-axial-double-radial hybrid flux structure can improve the power / rotational torque density of the motor through topology optimization; the direct water cooling structure arranged in the stator core and the excitation windings can improve the heat dissipation effect.

[0022] Preferably, the T-shaped split core is provided with double-axial-double-radial stator teeth, namely, axial left stator teeth, axial right stator teeth, radial outer stator teeth and radial inner stator teeth; the radial inner stator teeth are further provided with radial left inner stator teeth and radial right inner stator teeth; the axial left and right stator teeth are symmetrically connected to the radial outer stator teeth through the axial-radial circular arc silicon steel sheet, the lower parts of the axial left and right stator teeth are symmetrically connected to the radial left and right inner stator teeth respectively, the number of the silicon steel sheets in the upper parts of the axial left and right stator teeth is greater than that in the lower parts, the double-axial-double-radial stator teeth of the T-shaped split core are fixed by the carbon fiber polyether ether ketone composite material, the four-stator supports are connected through the gaps between adjacent T-shaped split cores, and the four-stator core and the four-stator supports are integrated through heating, stamping and curing. The four stator teeth are arranged by using the axial-radial circular arc silicon steel sheet, the internal magnetic resistance of the core is reduced, and the problem that the magnetic yoke is prone to saturation can be solved; the four stator teeth and the supports are fixed by using the carbon fiber polyether ether ketone composite material, the structural strength is high, and the dynamic stability is good.

[0023] Preferably, the four stator cores are provided with the double axial excitation windings: axial left stator winding and axial right stator winding; the double axial excitation windings provide the four stator double axial-double radial hybrid magnetic flux by using the shaft-radial circular arc silicon steel laminations. The double axial concentrated excitation windings can reduce current consumption and have a wider speed regulation range.

[0024] Preferably, the center hole is arranged between the four circular arc hole walls in the middle of the T-shaped split core, the middle of the four stator core is provided with the circumferential straight cooling water channel, the circumferential straight cooling water channel four corner gaps are sealed by using amino silicone resin; the circumferential straight cooling water channel water inlet is connected with the liquid cooling water channel water outlet pipe, and the circumferential straight cooling water channel water outlet is connected with the four stator support water outlet pipe. The straight cooling water channel arranged in the four stator core can effectively improve the heat dissipation effect of the stator core.

[0025] Preferably, the double axial excitation winding outer ring is respectively provided with the cooling water jacket, the cooling water jacket is tightly attached to the double axial excitation winding outer ring and the plurality of radial outer stator tooth end portions, the cooling water jacket is provided with the straight cooling fin, the straight cooling fin is inserted between adjacent axial excitation windings, and the cooling water jacket and the straight cooling fin are provided with the liquid cooling water channel in communication; the liquid cooling water channel water inlet pipe is connected with the four stator support water inlet pipe, and the liquid cooling water channel water outlet pipe is connected with the straight cooling water channel water inlet; the cooling water jacket, the straight cooling fin and the liquid cooling water channel adopt a heat-conducting pitch-based carbon fiber and resin composite material structure. The cooling water jacket and the straight cooling fin structure can reduce the thermal resistance between the excitation winding and the liquid cooling water channel and improve the heat dissipation effect.

[0026] Preferably, the outer rotor is provided with: a radial outer rotor, an axial left rotor, and an axial right rotor; the radial inner rotor is provided with: a radial left inner rotor and a radial right inner rotor; the outer rotor core and the radial left and right inner rotor cores are provided in a communication structure, the four rotor cores are all provided with permanent magnets, the four rotor cores are fixed on the four rotor rack, and the four rotor rack is connected to the main shaft by bearings. The four rotor cores are provided in a double axial-double radial magnetic circuit structure, so that the four stators and the four rotors form a hybrid magnetic flux loop.

[0027] Preferably, the four stator support of the carbon fiber polyether ether ketone composite material structure is arranged between the plurality of radial left and right inner stator teeth and passes through the radial left and right inner rotors and is fixed on the main shaft; the main shaft is a hollow main shaft, and the hollow main shaft is connected to a circuit and a water circuit. The composite material structure can simplify the manufacturing process and reduce production costs. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 . Water-cooled double axial-double radial hybrid magnetic flux wheel hub motor structure schematic diagram;

[0029] Figure 2 .╬ shaped block core structure schematic diagram;

[0030] Figure 3 . Four stator and support structure schematic diagram;

[0031] Figure 4 . Four stator core middle straight cooling water channel structure schematic diagram;

[0032] Figure 5 . Double axial field winding straight cooling structure schematic diagram.

[0033] Figure mark:

[0034] 1- Four stator support (water inlet pipe, water outlet pipe); 2- Axial left stator field winding; 3-1- Four rotor core; 3-2- Four rotor frame; 4- Axial left rotor; 5- Carbon fiber polyether ether ketone composite material structure; 6- Axial right rotor; 7- Radial outer rotor; 8- Axial left stator tooth; 9- Radial outer stator tooth; 10- Straight cooling water channel; 11- Axial right stator tooth; 12- Liquid cooling water channel inlet and outlet pipe; 13- Radial left inner stator tooth; 14- Radial left inner rotor; 15- Radial right inner stator tooth; 16- Radial right inner rotor; 17- Main shaft (water inlet, water outlet); 17-1- Water outlet pipe; 18- Bearing; 19-╬ shaped block core (axial-radial circular arc silicon steel sheet); 20- Axial right stator field winding; 21- Liquid cooling water channel; 22- Straight cooling fin; 23- Heat-conducting pitch-based carbon fiber and resin composite material structure; 24- Cooling water jacket. DETAILED DESCRIPTION

[0035] The application will be further described below in conjunction with the drawings and specific embodiments:

[0036] The application relates to a water-cooled double axial-double radial hybrid flux wheel hub motor, which mainly comprises: 1- Four stator support (water inlet pipe, water outlet pipe); 2- Axial left stator field winding; 3-1- Four rotor core; 5- Carbon fiber polyether ether ketone composite material structure; 10- Straight cooling water channel; 19-╬ shaped block core (axial-radial circular arc silicon steel sheet); 20- Axial right stator field winding; 21- Liquid cooling water channel; 22- Straight cooling fin; 23- Heat-conducting pitch-based carbon fiber and resin composite material structure; 24- Cooling water jacket. Figures 1-5A water-cooled biaxial-dual-radial hybrid flux hub motor includes: a U-shaped segmented iron core (axial-radial arc-shaped silicon steel laminations) 19, an axial left stator excitation winding 2, an axial right stator excitation winding 20, an axial left rotor 4, an axial right rotor 6, a radial outer rotor 7, a radial left inner rotor 14, a radial right inner rotor 16, a carbon fiber polyether ether ketone composite material structure 5, an axial left stator tooth 8, a radial outer stator tooth 9, an axial right stator tooth 11, a radial left inner stator tooth 13, and a radial right inner stator tooth 15, a direct cooling water channel 10, a four-stator support (inlet and outlet pipes) 1, a liquid cooling water channel 21, direct cooling fins 22, a thermally conductive asphalt-based carbon fiber and resin composite material structure 23, a cooling water jacket 24, and a main shaft (inlet and outlet) 17; the U-shaped segmented iron core 19 is configured as the axial-radial arc-shaped silicon steel lamination structure ( Figure 2 Multiple ╬-shaped segmented iron cores 19 are combined circumferentially to form a four-stator iron core. Figure 3 The four stator core is provided with the biaxial excitation windings 2 and 20, which provide the four stator mixed magnetic flux. Figure 3 The fourth stator core is provided with the direct cooling water channel 10 in the middle. Figure 1 . Figure 4 The direct cooling fins 22 are provided between the biaxial excitation windings 2 and 20. Figure 5 The direct-cooling fins 22 are made of thermally conductive carbon fiber composite material 23; the four-stator support 1 is made of carbon fiber polyetheretherketone composite material 5; the radial inner rotors are configured as radial left and right inner rotors 14 and 16; the four-stator support 1 is disposed between the radial left and right inner rotors 14 and 16 and is fixedly connected to the main shaft 17. Figure 1 The fourth stator support 1 is equipped with an inlet pipe and an outlet pipe 17-1, which are respectively connected to the inlet and outlet of the main shaft 1. Figure 1 The four rotor cores are configured with an axial-radial interconnected structure, and the four stators and four rotors are configured with a dual axial-radial hybrid magnetic flux circuit. Figure 1 . Figure 3 The power / torque density of the motor can be improved by utilizing the aforementioned biaxial-biradial hybrid flux structure and topology optimization; the heat dissipation effect can be improved by utilizing the aforementioned direct water cooling structures 10, 22, and 24.

[0037] See Figure 1 . Figure 2 The U-shaped segmented iron core 19 is provided with double axial-double radial stator teeth: axial left stator tooth 8, axial right stator tooth 11, radial outer stator tooth 9, and radial inner stator tooth; the radial inner stator tooth is further provided with: radial left inner stator tooth 13 and radial right inner stator tooth 15. Figure 1); the axial left and right stator teeth 8, 11 are respectively symmetrically connected to the radial outer stator teeth 9, the axial left and right stator teeth 8, 11 are respectively symmetrically connected to the radial left and right inner stator teeth 13, 15, the number of the silicon steel laminations in the upper part of the axial left and right stator teeth 8, 11 is greater than that in the lower part of the axial left and right stator teeth 8, 11 Figure 2 ); the carbon fiber polyether ether ketone composite material 5 is used to fix the double axial-double radial stator teeth of the ╬ shaped block iron core 19, and the four stator supports 1 are connected through the gaps between adjacent ╬ shaped block iron cores 19, and the four stator iron cores and the four stator supports 1 are integrated by heating, stamping and curing. The four stator teeth are arranged by using the axial-radial circular arc silicon steel laminations Figure 1 . Figure 2 ), the magnetic resistance in the iron core is reduced, and the problem of easy saturation of the magnetic yoke can be solved; the four stator teeth and the supports are fixed by using the carbon fiber polyether ether ketone composite material structure 5, and the structure has high strength and good dynamic stability.

[0038] Referring to Figure 3 . The four stator iron cores are provided with the double axial field winding 2, 20: the axial left stator winding 2 and the axial right stator winding 20; the double axial field winding 2, 20 provides the four stator double axial-double radial hybrid magnetic flux by using the axial-radial circular arc silicon steel laminations. The double axial concentrated field winding 2, 20 can reduce current consumption and has a wider speed regulation range.

[0039] Referring to Figure 1 . Figure 4 . The center hole is arranged between the four circular arc hole walls in the middle part of the ╬ shaped block iron core 19, and the four stator iron cores are provided with the circumferential straight cooling water channel 10 Figure 1 . The circumferential straight cooling water channel 10 is sealed by using amino organosilicon resin; the water inlet of the circumferential straight cooling water channel is connected to the water outlet pipe 12 of the liquid cooling water channel, and the water outlet of the circumferential straight cooling water channel is connected to the water outlet pipe 17-1 of the four stator supports 1 Figure 4 . The straight cooling water channel 10 arranged in the four stator iron cores can effectively improve the heat dissipation effect of the stator iron core.

[0040] Referring to Figure 1 . Figure 5 . The double axial field winding 2, 20 is respectively provided with the cooling water jacket 24, and the cooling water jacket 24 is tightly attached to the outer ring of the double axial field winding 2, 20 and the end part of the plurality of radial outer stator teeth 9 Figure 5 . The straight cooling fin 22 is arranged on the cooling water jacket 24, the straight cooling fin 22 is inserted between adjacent axial field windings 2, 20, and the cooling water jacket 24 and the straight cooling fin 22 are provided with the liquid cooling water channel 21 connected theretoFigure 5 ); the water inlet pipe of the liquid cooling water channel 21 is connected to the water inlet pipe of the four stator supports 1, and the water outlet pipe 12 of the liquid cooling water channel is connected to the water inlet of the straight cooling water channel 10 Figure 1 ); the cooling water jacket 24, the straight cooling fin 22, and the liquid cooling water channel 21 adopt a structure of thermally conductive pitch-based carbon fiber and resin composite material 23. The structure of the cooling water jacket 24 and the straight cooling fin 22 can reduce the thermal resistance between the excitation winding 2, 20 and the liquid cooling water channel 21, and improve the heat dissipation effect.

[0041] Referring to Figure 1 The four rotors are provided as a radial outer rotor 7, an axial left rotor 4, an axial right rotor 6, and a radial inner rotor. The radial inner rotor is provided as a radial left inner rotor 14 and a radial right inner rotor 16. The four rotor cores 3-1 are provided in a communication structure, and permanent magnets are arranged on the four rotor cores 3-1. The four rotor cores 3-1 are fixed on a four rotor frame 3-2, and the four rotor frame 3-2 is connected to the main shaft 17 by bearings 18. The four rotor cores 3-1 are provided in a double-axial and double-radial magnetic circuit structure, so that the four stators and the four rotors form a mixed magnetic flux loop.

[0042] Referring to Figure 1 The four stator supports 1 of the carbon fiber polyether ether ketone composite material structure 5 are arranged between the radial left and right inner stator teeth 13, 15 and pass through the radial left and right inner rotors 14, 16, and are fixed on the main shaft 17. The main shaft 17 is a hollow main shaft 17, and the circuit and the water channel are connected by the hollow main shaft 17. The composite material structure can simplify the manufacturing process and reduce the production cost.

Claims

1. A water-cooled biaxial-radial hybrid flux hub motor, characterized in that, include: The system comprises: axial-radial arc-shaped silicon steel laminates, ╬-shaped segmented iron cores, a fourth stator, biaxial excitation windings, a radial inner rotor, an outer rotor, direct cooling water channels, a cooling water jacket, direct cooling fins, liquid cooling water channels, a fourth stator support, and a main shaft. The ╬-shaped segmented iron cores are configured as axial-radial arc-shaped silicon steel laminates. The periphery of the fourth stator teeth of the ╬-shaped segmented iron cores is fixed using a carbon fiber polyetheretherketone composite material structure. Multiple ╬-shaped segmented iron cores are combined circumferentially to form a fourth stator. The biaxial excitation windings are provided on the fourth stator, providing mixed magnetic flux to the fourth stator. The direct cooling water channel is located in the middle of the fourth stator. The excitation windings are provided with direct cooling fins, which are made of thermally conductive pitch-based carbon fiber and resin composite material. The four stator supports are made of carbon fiber polyether ether ketone composite material. The radial inner rotors are configured as radial left and right inner rotors. The four stator supports are located between the radial left and right inner rotors and are fixed to the main shaft. The four stator supports are provided with water inlet pipes and water outlet pipes, which are respectively connected to the water inlet and water outlet of the main shaft. The four rotor cores are configured as axial-radial interconnected structures. The four stators and four rotors are configured as dual axial-dual radial hybrid magnetic flux circuits.

2. The water-cooled biaxial-radial hybrid flux hub motor as described in claim 1, characterized in that: The ╬-shaped segmented iron core is provided with dual axial-dual radial stator teeth: axial left stator teeth, axial right stator teeth, radial outer stator teeth, and radial inner stator teeth; the radial inner stator teeth are further configured as radial left inner stator teeth and radial right inner stator teeth; using the axial-radial arc-shaped silicon steel laminations, the upper parts of the axial left and right stator teeth are symmetrically connected to the radial outer stator teeth, and the lower parts of the axial left and right stator teeth are symmetrically connected to the radial left and right inner stator teeth, respectively. The number of lamination layers in the upper part of the axial left and right stator teeth is greater than the number of lamination layers in the lower part; the dual axial-dual radial stator teeth of the ╬-shaped segmented iron core are fixed by the carbon fiber polyetheretherketone composite material, and the four stator supports are connected through the gaps between adjacent ╬-shaped segmented iron cores. After heating, stamping and curing, an integrated structure of the four stator iron cores and the four stator supports is formed.

3. The water-cooled biaxial-radial hybrid flux hub motor as described in claim 1, characterized in that: The four stator cores are provided with dual axial excitation windings: an axial left stator winding and an axial right stator winding; using the axial-radial arc-shaped silicon steel laminations, the dual axial excitation windings provide the four stators with dual axial-radial mixed magnetic flux.

4. The water-cooled biaxial-radial hybrid flux hub motor as described in claim 1, characterized in that: A central hole is provided between the four circular arc holes in the middle of the ╬-shaped segmented iron core. The middle of the four stator iron core is provided with a circumferential direct cooling water channel. The gaps at the four corners of the circumferential direct cooling water channel are sealed with amino silicone resin. The inlet of the circumferential direct cooling water channel is connected to the outlet pipe of the liquid cooling water channel, and the outlet of the circumferential direct cooling water channel is connected to the outlet pipe of the four stator support.

5. The water-cooled biaxial-radial hybrid flux hub motor as described in claim 1, characterized in that: The outer ring of the biaxial excitation winding is provided with cooling water jackets, which are closely attached to the outer ring of the biaxial excitation winding and the ends of the multiple radial outer stator teeth. The cooling water jackets are provided with direct cooling fins, which are inserted between adjacent axial excitation windings. The cooling water jackets and the direct cooling fins are provided with communicating liquid cooling channels. The liquid cooling channel inlet pipe is connected to the inlet pipe of the four stator support, and the liquid cooling channel outlet pipe is connected to the inlet of the direct cooling channel. The cooling water jackets, the direct cooling fins, and the liquid cooling channels are constructed using a thermally conductive asphalt-based carbon fiber and resin composite material structure.

6. The water-cooled biaxial-radial hybrid flux hub motor as described in claim 1, characterized in that: The outer rotor is configured as: a radial outer rotor, an axial left rotor, and an axial right rotor; the radial inner rotor is configured as: a radial left inner rotor and a radial right inner rotor; the outer rotor core and the radial left and right inner rotor cores are configured as a connected structure to form a mixed magnetic flux circuit; each of the four rotor cores is provided with a permanent magnet, the four rotor cores are fixed on a four-rotor frame, and the four-rotor frame is connected to the main shaft by bearings.

7. The water-cooled biaxial-radial hybrid flux hub motor as described in claim 1 or 2, characterized in that: The four stator supports of the carbon fiber polyether ether ketone composite material structure are arranged between multiple radial left and right inner stator teeth, and pass through the radial left and right inner rotors, and are fixed on the main shaft; the main shaft is a hollow main shaft, and the circuit and water circuit are connected by the hollow main shaft.

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