Stator with segmented heat dissipation structure, switched reluctance motor and heat dissipation method

Abstract

The application discloses a stator with a segmented heat dissipation structure, a switched reluctance motor and a heat dissipation method, and belongs to the technical field of reluctance motors. The stator further comprises a winding heat dissipation assembly for taking away heat of a stator winding, an iron core heat dissipation assembly for taking away heat of a stator iron core, two pressing plate assemblies and a locking assembly outside the stator iron core and the stator winding. The stator iron core, the stator winding, the winding heat dissipation assembly and the iron core heat dissipation assembly are axially clamped and fixed between the two pressing plate assemblies. The locking assembly is used for locking and fixing the two pressing plate assemblies. The application can effectively eliminate winding temperature spikes, balance the whole machine temperature field, reduce heat dissipation redundant energy consumption, relieve thermal stress and insulation aging, and significantly improve the heat dissipation efficiency, energy saving effect and long-term operation stability of the switched reluctance motor.

Description

Technical Field

[0001] This invention belongs to the field of reluctance motor technology, specifically relating to a stator and a switched reluctance motor with a segmented heat dissipation structure and a heat dissipation method. Background Technology

[0002] Switched reluctance motors (SRMs) are widely used in industrial drives, transportation, equipment manufacturing, and many other fields due to their advantages such as simple structure, low manufacturing cost, wide speed range, good fault tolerance, and high reliability. SRMs operate based on the principle of minimum reluctance. During operation, the stator windings of each phase are alternately energized according to a specific timing sequence, exhibiting significant zonal, sequential, and alternating heating characteristics. This results in distinct heating states in different areas of the stator circumference at different times. The copper losses generated by the energized stator windings are the main heat source of the motor, while the iron losses generated by the alternating magnetization of the stator core generate relatively low and more uniform heat. Overall, the motor exhibits a distinctly differentiated and sequential heat source distribution characteristic.

[0003] Currently, most existing switched reluctance motors employ a single cooling solution, either a unified air-cooling system or a unified liquid-cooling system, resulting in a limited cooling approach that fails to match the unique time-sequential heating characteristics of switched reluctance motors. This leads to numerous technical shortcomings in practical applications. Existing integrated cooling structures, employing a uniform cooling logic with constant medium supply, cannot distinguish between the high-heat winding region and the low-temperature core region of the motor stator. They are ill-suited to the stator's alternating energization and zoned heating characteristics, exhibiting poor targeted cooling and weak adaptability to time-sequential heating.

[0004] Specifically, traditional integrated cooling systems are insufficient for dissipating heat in the high-heat-flux-density stator winding area, easily leading to excessively high temperature spikes during winding commutation and severe localized heat accumulation. Simultaneously, there is significant heat dissipation redundancy in the low-heat-flux-density stator core area, preventing precise, on-demand cooling. This results in uneven temperature distribution across the motor, excessive temperature differences between the windings and core, and substantial thermal stress. Long-term operation can cause core deformation and accelerated winding insulation aging, significantly reducing the motor's long-term reliability. Furthermore, traditional cooling systems often employ a constant flow and constant airflow, continuous full-area cooling mode. Regardless of whether the motor is under no-load, light-load, or heavy-load conditions, it maintains full-load cooling operation, resulting in significant ineffective heat dissipation losses, high overall energy consumption, and poor energy efficiency. This fails to meet the dual requirements of high motor cooling performance and energy-saving operation, severely hindering the development and application of switched reluctance motors towards higher power density, higher energy efficiency, and longer lifespan.

[0005] In summary, existing integrated single heat dissipation solutions for switched reluctance motors suffer from technical defects such as poor heat dissipation targeting, weak adaptability to sequential heating, uneven temperature field, high heat dissipation energy consumption, severe local heat accumulation, and poor long-term operational reliability. There is an urgent need to design a new heat dissipation structure and method that can adapt to the sequential and zoned heating characteristics of switched reluctance motors, achieve precise layered and zoned heat dissipation, and balance heat dissipation efficiency and energy saving. Summary of the Invention

[0006] To address one of the aforementioned technical deficiencies, this application provides a stator with a segmented heat dissipation structure, a switched reluctance motor, and a heat dissipation method.

[0007] The technical solution adopted by this invention to solve the problems existing in the prior art is: A stator with a segmented heat dissipation structure includes a stator core and stator windings disposed on the stator core, and further includes: The winding heat dissipation assembly is in thermal contact with the stator winding to remove heat from the stator winding.

[0008] The core heat dissipation component is attached to the outer peripheral wall of the stator core to remove heat from the stator core.

[0009] Two pressure plate assemblies are provided and arranged opposite each other along the axial direction. The stator core, stator winding, winding heat dissipation assembly, and core heat dissipation assembly are axially clamped and fixed between the two pressure plate assemblies. Cooling medium chambers are formed inside the pressure plate assemblies. The cooling medium chambers are in fluid communication with the winding heat dissipation assembly and the core heat dissipation assembly, respectively. The cooling medium chambers of the two pressure plate assemblies are connected to an external circulating cooling system to achieve circulating heat exchange of the cooling medium.

[0010] A locking assembly is inserted between the two pressure plate assemblies to lock and fix the two pressure plate assemblies.

[0011] Furthermore, the stator core includes an annular stack of silicon steel sheets, the inner ring of the silicon steel sheet stack is provided with a plurality of stator salient poles distributed in an annular array along its axis, the outer ring of the silicon steel sheet stack is provided with a plurality of end plates, and the end plates are provided with a first through hole.

[0012] The stator winding is sleeved on the stator salient poles stacked vertically in the same row, and the end of the stator winding is connected to a winding connecting plate, which is provided with a second through hole.

[0013] The locking assembly passes through the correspondingly arranged first through hole and second through hole.

[0014] Furthermore, the cooling medium chambers inside the pressure plate assembly are respectively annularly spaced gas chambers and liquid chambers, and the cooling medium inside the gas chambers and the liquid chambers are respectively gas and liquid. The gas chambers are connected to the iron core heat dissipation assembly, and the liquid chambers are connected to the winding heat dissipation assembly.

[0015] Furthermore, the winding heat dissipation assembly includes a flow regulating valve and two first radiator housings, the two first radiator housings being sandwiched between the two sides of the same stator winding, and a flow regulating valve being provided at each end of the first radiator housing.

[0016] The inlet of the flow regulating valve is connected to the cooling medium chamber of the pressure plate assembly via a connecting pipe, and the outlet of the flow regulating valve is connected to the two first radiator housings via a connecting pipe.

[0017] Furthermore, the flow regulating valve adjusts its opening degree via a connected temperature sensing element, which senses the temperature of the stator winding through a heat-conducting plate attached to the stator winding. The higher the temperature of the stator winding, the greater the opening degree of the flow regulating valve adjusted by the temperature sensing element.

[0018] Furthermore, the inner wall of the pressure plate assembly is provided with several liquid chamber interfaces that are connected to the liquid chamber. The connecting tube is inserted into the liquid chamber interface to realize the through connection between the liquid chamber and the winding heat dissipation assembly.

[0019] Furthermore, the iron core heat dissipation assembly includes a second heat dissipation housing, and the two ends of the second heat dissipation housing are respectively provided with mating slots.

[0020] The end face of the pressure plate assembly facing the iron core heat dissipation assembly is provided with an air chamber interface that is in communication with the air chamber. The mating slot is inserted into the air chamber interface to realize the through connection between the air chamber and the iron core heat dissipation assembly.

[0021] Furthermore, the pressure plate assembly is provided with an air passage connector that communicates with the air chamber and a liquid passage connector that communicates with the liquid chamber. The air passage connector and the liquid passage connector are configured to be connected to the circulating cooling system.

[0022] The pressure plate assembly has a coaxially arranged annular outer cover on the side facing the iron core heat dissipation assembly, and the outer cover is fitted over the outside of the iron core heat dissipation assembly.

[0023] A switched reluctance motor includes a switched reluctance motor assembly, wherein the stator in the switched reluctance motor assembly adopts the aforementioned stator with a segmented heat dissipation structure.

[0024] It also includes a circulating cooling system located outside the switched reluctance motor assembly, the circulating cooling system comprising a liquid cooling circulating system and an air cooling circulating system.

[0025] The liquid cooling circulation system includes a storage tank, a circulation pump, and a gas-liquid heat exchanger. The circulation pump pumps the coolant inside the storage tank into a liquid chamber of one of the pressure plate assemblies through a delivery pipe. The coolant inside the liquid chamber passes through the winding heat dissipation assembly and then flows into a return pipe through another liquid chamber of the pressure plate assembly. The coolant inside the return pipe is cooled by the gas-liquid heat exchanger and then flows back into the storage tank.

[0026] The air-cooled circulation system includes a cooling fan. The air inlet of the cooling fan is connected to an air filter. The exhaust of the cooling fan, through an air inlet pipe, discharges cooling air into the air chamber of one of the pressure plate assemblies. The cooling air inside the air chamber passes through the iron core heat dissipation assembly and then exits into the return air duct through the air chamber of another pressure plate assembly. A bypass pipe is connected to the air inlet pipe. The ends of the bypass pipe and the return air duct are both connected to the two air inlets of the same three-way control valve. The exhaust port of the three-way control valve is connected to the air inlet of the gas-liquid heat exchanger through a heat exchanger inlet pipe.

[0027] A heat dissipation method for a switched reluctance motor includes the following steps: S01, System Initialization: Before the motor starts, the controller controls the liquid cooling circulation system and the air cooling circulation system to complete the pre-start self-test and media circulation initialization, so that the coolant fills the internal chamber of each winding heat dissipation component, the cooling air is pre-entered into the internal air duct of the iron core heat dissipation component, and each sensor and valve group component completes the reset and stands ready. S02, Real-time Zone Monitoring: During motor operation, the temperature of the corresponding stator winding is collected in real time by the temperature sensing bulb and heat conduction plate of each winding heat dissipation component. Combined with the motor commutation timing signal, the real-time heating zone status of each stator winding is determined, and the operating condition monitoring signal is generated and transmitted to the controller. S03, Segmented adaptive liquid cooling: Based on the real-time zone temperature and operating conditions, the controller adaptively and independently adjusts the coolant flow of each segment winding heat dissipation component through the flow regulating valve corresponding to each stator winding. It increases the coolant flow to enhance heat dissipation in the high-heat zone that is powered on and generates heat, and maintains a small flow circulation in the low-temperature zone that is powered off and in standby mode to achieve basic heat preservation and heat dissipation, thus completing the segmented, on-demand, and precise liquid cooling of the stator winding. S04, Full-range iron core air cooling: While the liquid cooling partition heats up, the air cooling circulation system continuously delivers cooling air to the iron core heat dissipation components. The cooling air circulates in a meandering manner along the intersecting guide path inside the second heat dissipation shell, continuously carrying away the overall waste heat generated by the iron loss of the stator iron core and balancing the overall temperature field of the motor. S05, Coordinated regulation of gas-liquid heat exchange: The controller monitors the airflow temperature in the air-cooled circulation loop in real time. It dynamically adjusts the mixing ratio of fresh air and motor heat exchange return air through a three-way control valve. When the return air temperature is within the acceptable range, it uses waste heat to assist the coolant in heat exchange and cooling. When the return air temperature exceeds the acceptable range, it directly exhausts the high-temperature return air to ensure stable heat exchange operation of the gas-liquid heat exchanger. S06, Full-condition closed-loop adaptive fine-tuning: Throughout the motor's operation, the controller forms a closed-loop control based on the collected winding temperature, core temperature, medium flow rate, and airflow temperature parameters. According to different operating conditions of the motor, such as no-load, light-load, heavy-load, and high-speed, it adaptively adjusts the operating power of the liquid cooling circulation system and the air cooling circulation system to match the real-time heat load. S07. Residual heat release during shutdown: After the motor stops and the power is cut off, the control system controls the liquid cooling circulation system and the air cooling circulation system to continue working for a preset time to remove the residual heat from the stator winding and stator core. After the overall heat dissipation is reset, the heat dissipation system is shut down.

[0028] (1) The present invention sets up a layered dual-medium heat dissipation system. For the stator winding with high heat flux density and large instantaneous temperature fluctuation, high-efficiency liquid cooling segmented independent heat dissipation is adopted; for the stator core with low heat flux density and uniform heat generation throughout the entire area, low-energy-consumption air cooling is adopted to achieve the heat source matching heat dissipation logic of "high heat high heat dissipation, low heat low heat dissipation". At the same time, each stator winding is equipped with an independent flow regulating valve and temperature sensing monitoring structure, which can adaptively match the heat dissipation power according to the motor commutation sequence, accurately suppress the temperature peak at the moment of winding commutation, completely solve the problem of local high temperature accumulation caused by the inability of traditional integrated heat dissipation to adapt to the sequential heating of reluctance motor, and greatly optimize the uniformity of the overall temperature field of the motor.

[0029] (2) This invention adopts a single-winding independent segmented heat dissipation structure. Each winding heat dissipation unit does not interfere with each other and is independently controllable. Relying on the temperature sensing bulb and heat conduction plate to collect the winding temperature in real time, it realizes an adaptive control mode of large flow enhanced heat dissipation of the energized heating winding and small flow heat preservation cycle of the standby winding when the power is off, with no ineffective heat dissipation loss. At the same time, with the gas-liquid synergistic heat exchange structure, the waste heat of the motor air cooling can be used to assist the cooling liquid in cooling, realizing secondary energy recovery and utilization. Moreover, the system can adaptively adjust the liquid cooling and air cooling operating power according to the full load state of the motor, which greatly reduces the overall operating energy consumption of the heat dissipation system and effectively solves the problems of energy imbalance and poor energy saving of traditional heat dissipation schemes.

[0030] (3) This application sets staggered guide fins and diagonal guide hole structures inside both the winding liquid cooling shell and the iron core air cooling shell, which effectively extends the tortuous flow path of the cooling medium, increases the heat exchange contact area, strengthens the medium disturbance effect, and completely avoids the defects of traditional flat DC medium short-circuit flow and insufficient heat exchange. The inner layer segmented liquid cooling directly adheres to the stator winding sidewall and end core heating area, with low contact thermal resistance and high heat exchange efficiency, which can quickly remove the concentrated heat of the winding; the outer layer full-area air cooling fully covers the stator yoke, continuously dissipates the iron core waste heat, and balances the temperature field of the whole machine. The dual-layer heat dissipation system works together and has a clear division of labor. The heat dissipation upper limit is much higher than that of the traditional single heat dissipation structure, which can effectively adapt to the harsh working conditions such as heavy load, high speed, frequent start and stop, and frequent phase commutation of the motor, and broaden the power density and operating condition boundary of the motor.

[0031] (4) This invention establishes a closed-loop control system for multiple parameters such as temperature, flow rate and wind speed, which can monitor the temperature parameters of the winding, iron core and heat exchange airflow in real time. The fresh air and return air ratio can be dynamically adjusted through a three-way control valve. Overheating is automatically discharged and pressure is released. Under normal conditions, waste heat is recovered and exchanged. It can adapt to all operating conditions such as no-load, light-load, heavy-load and high-temperature environment, avoiding the problems of poor adaptability of traditional fixed heat dissipation mode, insufficient heat dissipation under extreme conditions and energy waste under normal conditions. It realizes intelligent, refined and adaptive operation of heat dissipation system, and further improves the stability and adaptability of motor operation under all conditions. Attached Figure Description

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Figure 1 This is a schematic diagram of the stator structure with segmented heat dissipation structure of the present invention. Figure 2 for Figure 1 A schematic diagram of the structure after removing the pressure plate assembly. Figure 3 for Figure 2 A schematic diagram of the structure after removing the stator core heat dissipation components. Figure 4 for Figure 3 A schematic diagram of the mechanism after removing the stator winding heat dissipation components. Figure 5 This is a schematic diagram of a single stator core structure in the stator with a segmented heat dissipation structure according to the present invention. Figure 6 This is a schematic diagram of the stator winding structure in the stator with a segmented heat dissipation structure according to the present invention. Figure 7 This is a schematic diagram of the stator winding heat dissipation assembly with a segmented heat dissipation structure according to the present invention. Figure 8 for Figure 7 A partial sectional view, Figure 9 This is a schematic diagram of the stator core heat dissipation assembly with a segmented heat dissipation structure according to the present invention. Figure 10 for Figure 9 A partial sectional view, Figure 11 This is a schematic diagram of the outer structure of the stator intermediate pressure plate assembly with segmented heat dissipation structure according to the present invention. Figure 12 This is a schematic diagram of the inner structure of the stator intermediate pressure plate assembly with segmented heat dissipation structure according to the present invention. Figure 13 This is a first cross-sectional view of the stator intermediate pressure plate assembly with segmented heat dissipation structure according to the present invention. Figure 14 for Figure 13 Enlarged view of a portion of point A in the middle. Figure 15 This is a second cross-sectional view of the stator intermediate pressure plate assembly with segmented heat dissipation structure according to the present invention. Figure 16 for Figure 15 Enlarged view of a section at point B in the middle. Figure 17 This is a third sectional view of the stator intermediate pressure plate assembly with segmented heat dissipation structure according to the present invention. Figure 18 for Figure 17 Enlarged view of a section at point C. Figure 19 This is an exploded view of the stator pressure plate assembly with a segmented heat dissipation structure according to the present invention. Figure 20 for Figure 19 Enlarged view of a section at point D. Figure 21 This is a sectional view of the assembled pressure plate assembly and stator winding heat dissipation assembly. Figure 22 for Figure 21 Enlarged view of a section at point E in the middle. Figure 23 This is a sectional view of the assembled pressure plate assembly and stator core heat dissipation assembly. Figure 24 for Figure 23 Enlarged view of a section at point F in the middle. Figure 25 This is a diagram of the circulating cooling system for the switched reluctance motor of the present invention.

[0034] In the picture: 1-Stator core, 11-Silicon steel sheet stack, 12-Stator salient pole, 13-End plate, 14-First through hole.

[0035] 2-Stator winding, 21-Winding connecting plate, 22-Second through hole.

[0036] 3-Winding heat dissipation assembly, 31-Flow regulating valve, 32-Connecting tube, 33-Conical clamp connector, 34-Temperature sensor, 35-Heat conduction plate, 36-Connecting pipe, 37-First radiator housing, 38-First heat dissipation fins, 39-First flow guide hole.

[0037] 4-Iron core heat dissipation assembly, 41-Second heat sink housing, 42-Matching slot, 43-Second heat dissipation fins, 44-Second airflow guide hole.

[0038] 5-Pressure plate assembly, 51-Annular body, 52-Gas chamber, 53-Gas chamber interface, 54-Gas chamber interface sealing surface, 55-Liquid chamber, 56-Liquid chamber interface, 57-Liquid chamber interface sealing surface, 58-Third through hole, 59-Outer protective cover, 510-Support shoulder, 511-Side upright plate, 512-Pressure block, 513-Gas connection connector, 514-Liquid connection connector.

[0039] 6-Locking assembly.

[0040] 7-Liquid cooling circulation system, 71-Liquid storage tank, 72-Circulation pump, 73-Liquid delivery pipe, 74-Gas-liquid heat exchanger, 75-Return pipe.

[0041] 8-Air-cooled circulation system, 81-Cooling fan, 82-Air filter, 83-Inlet duct, 84-Bypass duct, 85-Three-way control valve, 86-Return duct, 87-Heat exchanger inlet duct. Detailed Implementation

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of this application belong. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application.

[0043] Furthermore, the specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for illustrative purposes and are determined based on the exemplary orientations shown in the accompanying drawings. Therefore, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0044] The following is in conjunction with the appendix Figure 1 To be continued Figure 25 The present invention provides a more detailed description of the stator with a segmented heat dissipation structure, the switched reluctance motor, and the heat dissipation method.

[0045] Depend on Figure 1As shown, a stator with a segmented heat dissipation structure includes a stator core 1 and stator windings 2, a winding heat dissipation assembly 3, a core heat dissipation assembly 4, a pressure plate assembly 5, and a locking assembly 6, all mounted on the stator core 1. These components cooperate with each other and are arranged in layers and segments to form an independent and controllable dual-medium heat dissipation system. This system can precisely adapt to the alternating heating conditions of the switched reluctance motor stator, effectively optimizing the overall heat dissipation performance of the motor and reducing the energy consumption of the heat dissipation system.

[0046] Depend on Figure 5 As shown, the stator core 1 includes an annular silicon steel sheet stack 11. The inner ring of the silicon steel sheet stack 11 has several stator salient poles 12 arranged in a circular array along its axis. The stator salient poles 12 serve as the mounting carriers for the stator windings and the core magnetic heating area, forming the core structure for motor excitation and torque generation. The outer ring of the silicon steel sheet stack 11 has several end plates 13, each end plate 13 having a first through hole 14.

[0047] The stator salient poles 12 arranged in a ring array ensure uniform magnetic circuit distribution, conforming to the working principle of salient poles in switched reluctance motors, and providing a stable assembly and positioning foundation for the stator windings. The stacked structure of the silicon steel sheet laminates 11 effectively reduces eddy current losses in the core, minimizing core heating at the source. The end plate 13 and the first through hole 14 provide assembly points for subsequent overall axial locking and fixing, ensuring the rigidity and coaxiality of the stator core structure and preventing problems such as core loosening, increased vibration, and abnormal heating during long-term operation.

[0048] Depend on Figure 6 As shown, the stator winding 2 is sleeved on the stator salient poles 12 stacked in the same row, and is closely fitted with the stator salient poles 12 to achieve stable excitation operation. The end of the stator winding 2 is connected to a winding connecting plate 21, and the winding connecting plate 21 is provided with a second through hole 22.

[0049] The stator winding 2 is fitted onto the stator salient pole 12, ensuring a high degree of fit and good electromagnetic coupling performance, thus guaranteeing normal torque output of the motor. The second through hole 22 corresponds to and engages with the first through hole 14 on the core end plate, achieving structural alignment and integration, and significantly improving overall assembly accuracy and structural compactness.

[0050] The locking assembly 6 adopts a bolt and nut connection, wherein the bolt passes through the correspondingly arranged first through hole 14 and second through hole 22 to achieve pre-fixed positioning of the stator core and stator winding.

[0051] The through-bolt and nut locking structure is simple to assemble and has high fastening strength. It can firmly attach and fix the stator core and stator windings, effectively suppressing the structural loosening caused by electromagnetic vibration during motor operation, avoiding the problem of increased heat generation caused by winding insulation wear and increased gap between core laminations, and improving the overall structural stability and operational reliability of the stator.

[0052] The winding heat dissipation component 3 is in thermal contact with the stator winding 2, specifically targeting the largest heat source of the entire machine, namely the copper loss heat generation of the stator winding, to efficiently remove the concentrated heat generated during the operation of the stator winding 2.

[0053] Depend on Figure 7 as well as Figure 8 As shown, the winding heat dissipation assembly 3 includes a flow regulating valve 31 and two first radiator housings 37. The two first radiator housings 37 are symmetrically sandwiched on both sides of the same stator winding 2 to achieve full-wrap heat conduction coverage of a single winding. A flow regulating valve 31 is provided at each end of the first radiator housing 37 to realize independent medium flow control of the single winding heat dissipation unit.

[0054] The double-sided clamping shell structure can fit snugly against the sidewalls and end heating areas of the stator windings, greatly reducing contact thermal resistance and improving heat conduction efficiency. Each stator winding 2 is independently equipped with a flow regulating valve 31, forming an independent segmented heat dissipation unit for each winding. This is completely different from the traditional integrated heat dissipation structure, allowing for individual control of the heat dissipation intensity of each winding, precisely matching the operating characteristics of the switched reluctance motor where each winding is alternately energized and heats up.

[0055] The inlet of the flow regulating valve 31 is connected to the cooling medium chamber of the pressure plate assembly 5 through the connecting pipe 32, and the outlet of the flow regulating valve 31 is connected to the two first radiator housings 37 through the connecting pipe 36, forming a complete closed liquid cooling medium flow path.

[0056] The plug-in docking structure facilitates assembly and features a neat piping layout, enabling directional and stable delivery of the cooling medium and preventing turbulent flow and uneven heat exchange. The independent piping connection structure ensures that the medium flow in each heat dissipation unit does not interfere with each other, providing a structural basis for independent temperature control in each zone.

[0057] The flow regulating valve 31 adjusts its opening degree through a connected temperature sensing element 34. The telescopic rod of the temperature sensing element 34 is connected to the valve stem of the flow regulating valve 31. The extension and retraction of the telescopic rod drives the valve stem to move, thereby achieving adaptive adjustment of the valve opening degree of the flow regulating valve 31. The temperature sensing element 34 accurately senses the temperature of the stator winding 2 in real time through a heat-conducting plate 35 that is in contact with the stator winding 2. The higher the temperature of the stator winding 2, the greater the valve opening degree of the flow regulating valve 31 adjusted by the temperature sensing element 34, in order to adaptively adapt to the phenomenon of alternating energization and heating of the various stator windings 2 in the switched reluctance motor.

[0058] The mechanical temperature sensor 34, in conjunction with the heat-conducting plate 35, directly collects the real-time temperature of the windings. This method offers precise temperature measurement, fast response, eliminates the need for complex electronic control programs, and provides strong anti-interference capabilities. Based on the real-time winding temperature, the coolant flow rate is adaptively adjusted to achieve a dynamic adaptation effect: a high-flow-rate cooling cycle for the energized, heat-generating windings and a low-flow-rate heat-preserving cycle for the de-energized, standby windings. This completely solves the energy waste problem of traditional constant-flow-rate cooling systems, significantly improving cooling accuracy and energy efficiency.

[0059] To further improve the heat dissipation capacity of the first radiator housing 37, a plurality of first heat dissipation fins 38 are provided at intervals along the flow direction of the coolant inside the housing. Each first heat dissipation fin 38 divides the interior of the first radiator housing 37 into several independent chambers. Each first heat dissipation fin 38 is provided with a first guide hole 39, which connects adjacent chambers. The first guide holes 39 on adjacent first heat dissipation fins 38 are staggered, preferably located at two opposite corners of the chamber.

[0060] Multiple sets of first heat dissipation fins 38 can significantly increase the heat exchange area between the coolant and the casing, improving heat exchange efficiency. The staggered diagonally arranged first guide holes 39 effectively extend the tortuous flow path of the coolant inside the casing, prolong the heat exchange time of the medium, avoid the problem of short-circuit flow of coolant and insufficient heat exchange, further enhance the cooling effect on the concentrated high temperature of the stator winding, and effectively suppress the temperature peak at the moment of commutation.

[0061] The iron core heat dissipation component 4 is closely attached to the outer peripheral wall of the stator iron core 1, that is, the low-temperature heat-generating area of ​​the stator yoke, and specifically removes the heat generated by iron loss during the operation of the stator iron core 1, forming a composite heat dissipation system with the winding heat dissipation component 3 in an inner and outer layered and zoned manner.

[0062] Depend on Figure 9 as well as Figure 10 As shown, the iron core heat dissipation assembly 4 includes a second heat dissipation housing 41. The two ends of the second heat dissipation housing 41 are respectively provided with mating slots 42. The mating slots 42 are used to communicate with the cooling medium chamber inside the pressure plate assembly 5 to realize the stable input and output of cooling air.

[0063] The second heat dissipation housing 41 is fitted to the yoke of the stator core, providing comprehensive coverage of the heat-generating area around the core and quickly dissipating residual heat from core losses. The end slots 42 enable quick-connect assembly, and the well-sealed structure ensures directional airflow for cooling, preventing air leakage that could reduce heat dissipation efficiency.

[0064] To further improve the heat dissipation capacity of the second heat dissipation housing 41, a plurality of second heat dissipation fins 43 are provided at intervals along the flow direction of the coolant inside the housing. Each second heat dissipation fin 43 divides the interior of the second heat dissipation housing 41 into several independent chambers. Second heat dissipation fins 43 are provided with second flow guide holes 44, which connect adjacent chambers. The second flow guide holes 44 on adjacent second heat dissipation fins 43 are staggered, preferably located at two opposite corners of the chamber.

[0065] The second heat dissipation fins 43 effectively increase the air-cooled heat exchange area and improve the heat dissipation efficiency of the iron core. The staggered second air guide holes 44 extend the cooling airflow path, disturb the airflow to improve the convective heat transfer coefficient, and enable the cooling air to fully exchange heat with the shell. This can quickly and evenly remove the excess heat from the entire stator iron core, balance the temperature field around the stator, and reduce the heat accumulation and thermal stress deformation of the iron core.

[0066] Two pressure plate assemblies 5 are symmetrically arranged and are opposite to each other along the stator axis. The stator core 1, stator winding 2, winding heat dissipation assembly 3 and core heat dissipation assembly 4 are axially clamped and fixed between the two pressure plate assemblies 5, playing the core role of overall positioning, clamping and fixing and cooling medium diversion integration.

[0067] The dual-sided symmetrical pressure plate structure enables axial clamping and fixing of all stator core structures, improving the overall structural compactness and rigidity, and suppressing motor vibration. Simultaneously, the integrated dual-medium media chamber simplifies the overall piping layout, enabling centralized distribution and circulation of air-cooled and liquid-cooled media, resulting in high integration and convenient assembly.

[0068] The annular body 51 of the pressure plate assembly 5 has a cooling medium chamber, which is in fluid communication with the winding heat dissipation assembly 3 and the iron core heat dissipation assembly 4. The cooling medium chambers of the two pressure plate assemblies 5 are connected to an external circulating cooling system to achieve closed-loop circulation heat exchange of the cooling medium. The cooling medium chambers inside the pressure plate assembly 5 are annularly spaced gas chambers 52 and liquid chambers 55. The cooling medium inside the gas chamber 52 and the liquid chamber 55 is gas and liquid, respectively. The gas chamber 52 is connected to the iron core heat dissipation assembly 4, and the liquid chamber 55 is connected to the winding heat dissipation assembly 3.

[0069] Employing a dual-chamber, independently partitioned gas-liquid cooling system, this design achieves a layered heat dissipation architecture with liquid cooling for the inner windings and air cooling for the outer core. This precisely matches the heat source characteristics of the reluctance motor: for the high-heat-generating, high-heat-flux-density copper-loss heat source in the windings, a more efficient liquid cooling medium is used for precise cooling. For the low-heat-flux-density iron-loss heat source in the core, low-energy-consumption air cooling is employed, balancing extreme heat dissipation performance with overall energy efficiency. This structurally addresses the poor adaptability and energy consumption imbalance issues of traditional single-mode cooling systems.

[0070] During the operation of a switched reluctance motor, the main sources of heat are copper losses and iron losses. Copper losses are caused by the resistance of the conductors as current flows through the stator winding 2, and are the largest heat source of the motor. Iron losses are caused by hysteresis losses and eddy current losses generated by the alternating magnetic field in the silicon steel sheets of the stator and rotor, causing the stator core 1 to heat up as a whole, and the heat generated by iron losses is significantly less than that of copper losses. This solution specifically matches the characteristics of the heat sources, using low-energy-consumption air cooling for the stator core 1 and high-efficiency liquid cooling for the stator winding 2, achieving a precise match between the heat source and the cooling method.

[0071] Depend on Figure 17 as well as Figure 18 As shown, the inner wall of the pressure plate assembly 5 is provided with a plurality of liquid chamber interfaces 56 that are connected to the liquid chamber 55. The connecting tube 32 is inserted into the liquid chamber interface 56 to realize the through connection between the liquid chamber 55 and the winding heat dissipation assembly 3. In order to improve the sealing effect after the connecting tube 32 is inserted, an annular liquid chamber interface sealing surface 57 is provided at the junction of the liquid chamber interface 56 and the liquid chamber 55. After the connecting tube 32 is inserted, its end abuts against the liquid chamber interface sealing surface 57, and a sealing ring can be added to further enhance the sealing performance.

[0072] The dedicated plug-in liquid chamber interface structure ensures precise alignment and efficient assembly. The annular sealing surface, in conjunction with the sealing ring, achieves multi-stage sealing, completely eliminating the risk of liquid cooling medium leakage, ensuring the airtightness and pressure stability of the liquid cooling circuit, avoiding safety hazards such as motor insulation failure and short circuits caused by medium leakage, and improving the operational stability of the heat dissipation system.

[0073] At the same time, by Figure 19 as well as Figure 20 As shown, in order to limit and fix the connecting tube 32 and ensure that its end is tightly fitted with the sealing surface 57 of the liquid chamber interface, in this embodiment, the inner ring of the annular body 51 is provided with a support shoulder 510, and the liquid chamber interface 56 is located on the inner wall of the annular body 51 above the support shoulder 510. Two side plates 511 are provided at the position opposite to the liquid chamber interface 56, and clamping blocks 512 are detachably connected to the side plates 511 by bolts. A tapered clamping connector 33 is sleeved on the outside of the connecting tube 32 located outside the liquid chamber interface 56 and is coaxially fixedly connected to it. The large-diameter end of the tapered clamping connector 33 faces the annular body 51. The clamping block 512 is semi-circular, and its bottom surface is recessed with a groove that matches the tapered clamping connector 33.

[0074] The tapered clamping connector and the inclined surface of the clamping block groove generate axial force during clamping, continuously pushing the connecting tube to the sealing surface, achieving automatic centering and clamping seal, effectively offsetting the sealing loosening problem caused by assembly gaps and operating vibrations. The detachable clamping structure facilitates later inspection, disassembly, and maintenance, and features high structural reliability and strong adaptability.

[0075] The end face of the pressure plate assembly 5 facing the iron core heat dissipation assembly 4 is provided with an air chamber interface 53 that is in communication with the air chamber 52. The mating slot 42 is inserted into the air chamber interface 53 to realize the through connection between the air chamber 52 and the iron core heat dissipation assembly 4.

[0076] Depend on Figure 15 as well as Figure 16 As shown, in order to improve the sealing effect after the mating slot 42 is inserted, an annular air chamber interface sealing surface 54 is provided at the junction of the air chamber interface 53 and the air chamber 52. After the mating slot 42 is inserted, its end abuts against the air chamber interface sealing surface 54, and a sealing ring can be added to further improve the sealing performance.

[0077] The special sealing structure of the air chamber can effectively seal the gaps in the air duct, avoid cooling air leakage and air pressure loss, ensure the stability of air volume and air pressure in the air-cooled circuit, ensure the heat exchange efficiency of the iron core heat dissipation component, and avoid problems such as insufficient heat dissipation and high temperature of the iron core due to air leakage.

[0078] The pressure plate assembly 5 is externally provided with an air passage connector 513 that is connected to the air chamber 52 and a liquid passage connector 514 that is connected to the liquid chamber 55. The air passage connector 513 and the liquid passage connector 514 are configured to connect to an external circulating cooling system to realize continuous circulating heat exchange of the cooling medium.

[0079] The external independent connectors are neatly arranged and easy to connect, allowing for quick matching with external air-cooled and liquid-cooled circulation systems. They are easy to disassemble and maintain, while ensuring the sealing and smooth flow of the medium circulation loop.

[0080] The pressure plate assembly 5 has a coaxially arranged annular outer cover 59 on the side facing the iron core heat dissipation assembly 4. The outer cover 59 is fitted over the outside of the iron core heat dissipation assembly 4. The annular outer cover 59 can limit and press the iron core heat dissipation assembly 4 in all directions, avoiding the heat dissipation shell from loosening, displacement, or falling off due to long-term airflow and vibration. This ensures the integrity and stability of the air-cooled structure, and also provides dust protection and extends the service life of the heat dissipation assembly.

[0081] The locking component 6 is inserted between the two pressure plate components 5 and is used to axially lock and fix the two pressure plate components 5, forming an integrated rigid structure with the stator overall structure.

[0082] A third through hole 58 is provided on the annular body 51 of the pressure plate assembly 5. The first through hole 14, the second through hole 22 and the third through hole 58 are arranged coaxially. The bolts of the locking assembly 6 pass through the third through hole 58, the second through hole 22, several first through holes 14 and the corresponding through hole at the bottom in sequence, and then the nuts are sleeved and locked to achieve the integrated fixation of the stator structure of the whole machine.

[0083] The multi-hole coaxial alignment and locking structure achieves overall axial fixation of the pressure plate, winding, and iron core. The whole structure has strong integrity and extremely high rigidity, which can effectively resist electromagnetic vibration and mechanical impact when the motor is running at high speed, avoid relative displacement of each component, and ensure the fitting accuracy and heat dissipation stability of the heat dissipation structure.

[0084] A switched reluctance motor includes a switched reluctance motor assembly. The stator in the switched reluctance motor assembly adopts the stator with segmented heat dissipation structure described above. The remaining rotor, housing, electronic control and other structures use existing mature structures without major modifications, resulting in low modification costs and strong adaptability.

[0085] The switched reluctance motor is also equipped with an external circulating cooling system, which includes a liquid cooling circulating system 7 and an air cooling circulating system 8, respectively providing circulating cooling medium for the winding heat dissipation assembly and the iron core heat dissipation assembly.

[0086] Depend on Figure 25 As shown, the liquid cooling circulation system 7 includes a liquid storage tank 71, a circulation pump 72, and a gas-liquid heat exchanger 74. The circulation pump 72 pumps the coolant inside the liquid storage tank 71 into a liquid chamber 55 of a pressure plate assembly 5 through a liquid delivery pipe 73. The coolant inside the liquid chamber 55 passes through the winding heat dissipation assembly 3 and then flows into a return pipe 75 through another liquid chamber 55 of the pressure plate assembly 5. The coolant inside the return pipe 75 is cooled by the gas-liquid heat exchanger 74 and then flows back to the liquid storage tank 71, forming a closed-loop liquid cooling circulation.

[0087] The closed-loop liquid cooling circulation system features low medium loss and strong heat dissipation stability, continuously removing peak heat from the windings. The gas-liquid heat exchanger can quickly cool the heated coolant, ensuring a constant temperature of the medium entering the motor, avoiding heat dissipation attenuation caused by high-temperature medium circulation, continuously maintaining the windings at a low temperature, and extending the motor's insulation life.

[0088] The air-cooled circulation system 8 includes a cooling fan 81. The air inlet of the cooling fan 81 is connected to an air filter 82, which can effectively filter dust and impurities in the air and prevent air duct blockage. The exhaust end of the cooling fan 81 discharges cooling air into the air chamber 52 of one of the pressure plate assemblies 5 through the air inlet pipe 83. The cooling air inside the air chamber 52 passes through the iron core heat dissipation assembly 4 and then discharges into the return air pipe 86 through the air chamber 52 of another pressure plate assembly 5, forming an air-cooled circulation loop.

[0089] A bypass pipe 84 is connected to the air inlet pipe 83. The ends of the bypass pipe 84 and the return air pipe 86 are both connected to the two air inlets of the same three-way control valve 85. The exhaust port of the three-way control valve 85 is connected to the air inlet of the gas-liquid heat exchanger 74 through the heat exchanger air inlet pipe 87.

[0090] An air filter ensures a clean air-cooled circuit, preventing dust accumulation and blockage of air ducts during long-term operation, which would reduce heat dissipation efficiency. A bypass pipe, in conjunction with a three-way control valve, allows for dynamic adjustment of the cooling air ratio, utilizing the waste heat from the motor exhaust to assist in coolant heat exchange, achieving secondary energy utilization and further reducing overall system energy consumption.

[0091] In this embodiment, temperature sensors are installed on both the return air duct 86 and the heat exchanger inlet air duct 87. The sensors are electrically connected to the three-way control valve 85 through the controller. By detecting the airflow temperature in real time, the opening of the three-way control valve 85 is dynamically adjusted to adjust the mixing ratio of fresh air and return air, ensuring that the airflow temperature entering the heat exchanger is always lower than the set threshold, thus ensuring stable heat exchange efficiency.

[0092] The closed-loop temperature control logic can adapt to different loads and temperature rise conditions, avoiding heat exchange failure caused by excessively high airflow temperature, ensuring stable operation of the dual-medium heat dissipation system around the clock, and improving the adaptability of the motor to all operating conditions.

[0093] In this embodiment, a three-way valve is connected in series on the return air duct 86. The remaining outlet of the three-way valve is connected to the exhaust pipe. When the return air duct 86 detects that the airflow temperature is higher than the threshold, the exhaust pipe can be automatically opened to directly discharge the high-temperature exhaust gas, thereby preventing high-temperature backflow from affecting the heat dissipation effect and further improving the reliability of system control.

[0094] A heat dissipation method for a switched reluctance motor includes the following steps: S01. System pre-startup self-test and media cycle initialization: Before the motor starts, the controller synchronously wakes up the liquid cooling circulation system 7 and the air cooling circulation system 8. The circulation pump 72 works to pump the coolant inside the storage tank 71 into the liquid chamber 55 of the pressure plate assembly 5 on both sides through the liquid delivery pipe 73, completing the medium filling and exhaust of the chamber of each winding heat dissipation assembly 3. The cooling fan 81 starts, and the clean cold air filtered by the air filter 82 is introduced into the air chamber 52 of the pressure plate assembly 5 and the iron core heat dissipation assembly 4 through the air inlet pipe 83, completing the pre-ventilation of the air cooling circuit. At the same time, each temperature sensor, three-way control valve 85, and segmented flow regulating valve 31 of the winding heat dissipation assembly 3 complete the initialization and reset, and enter the real-time monitoring and control standby state.

[0095] S02. Real-time temperature acquisition and heat generation zone determination of motor operation: During normal operation of the switched reluctance motor, the heat-conducting plate 35 and the temperature sensing bulb 34 of each winding heat dissipation component 3 are in real time to collect the instantaneous temperature of the corresponding stator winding 2. Synchronously with the motor commutation timing signal, the power-on heating state and power-off standby state of each stator winding 2 are determined in real time. The instantaneous high-heat heating zone and low-temperature standby zone of the stator core 1 are accurately distinguished, and the zone temperature data and operating condition signal are generated and transmitted to the controller in real time.

[0096] S03, Segmented liquid cooling with adaptive zoned flow control for heat dissipation: Based on the zoned temperature data and operating condition signals collected by S02, the flow regulating valve 31 corresponding to each stator winding 2 adaptively adjusts the valve opening through the temperature sensing bulb 34: For the stator winding 2 that is currently powered on and generating heat, as the winding temperature rises, the temperature sensing bulb 34 drives the valve opening to increase, thereby increasing the coolant flow rate in the liquid cooling chamber inside the corresponding segment of the first radiator housing 37, enhancing the precise heat dissipation of the high-heat area, quickly removing the concentrated heat from the copper losses of the stator winding 2, and suppressing temperature peaks; For the stator winding 2 that is powered off and in standby mode, the valve opening adaptively decreases, maintaining a small flow rate of coolant circulation. The coolant enters the first radiator housing 37 through the liquid chamber 55 of the pressure plate assembly 5, the connecting pipe 32, and the connecting pipe 36, thus meeting the basic heat dissipation requirements while avoiding energy consumption redundancy caused by large flow rate operation throughout the entire area, achieving independent on-demand liquid cooling heat dissipation for each segment of the single winding 2.

[0097] S04, Stator core constant air cooling auxiliary heat dissipation: While the liquid cooling partition provides precise heat dissipation, the cooling fan 81 continuously delivers constant cooling air into the second heat dissipation housing 41 of the iron core heat dissipation assembly 4. The cooling air enters the second heat dissipation housing 41 through the air chamber 52, air chamber interface 53, and mating slot 42 of the pressure plate assembly 5. It forms a meandering flow path along the second guide holes 44 arranged in a staggered manner on the second heat dissipation fins 43, and fully completes heat exchange with the yoke of the stator iron core 1. It continuously removes the residual heat generated by iron loss during the operation of the stator iron core 1, balances the overall temperature field of the stator, reduces the heat accumulation and thermal stress deformation of the iron core, and suppresses motor vibration and noise.

[0098] S05, Synergistic Regulation of Heat Exchange Between Cold and Hot Media and Optimization of Airflow Ratio: Temperature sensors on the inlet duct 87 and return duct 86 of the heat exchanger monitor the temperature of the heat exchange airflow in real time. The controller dynamically adjusts the opening of the three-way control valve 85 according to the temperature threshold, adaptively adjusting the mixing ratio of the fresh air / cooled air delivered by the inlet duct 83 and the heat exchange return air discharged from the return duct 86. When the return air temperature is within the normal threshold range, the return air ratio is increased, and the waste heat airflow is used to assist the gas-liquid heat exchanger 74 in cooling the return coolant, realizing secondary energy utilization. When the return air temperature is higher than the set threshold, the three-way valve on the return duct 86 is adjusted to open the venting pipe, directly discharging the high-temperature return air, avoiding the backflow of high-temperature airflow from affecting the heat exchange efficiency, and ensuring the continuous and stable operation of the gas-liquid heat exchanger 74.

[0099] S06, Full-condition closed-loop adaptive fine-tuning: Throughout the entire operation of the motor, the controller continuously collects parameters such as the temperature of the stator winding 2, the temperature of the stator core 1, the flow rate of the liquid cooling circulation system 7, and the airflow temperature of the air cooling circulation system 8 in each zone, forming a closed-loop control logic. Under light load and no-load conditions, the overall heat load is low, and the system automatically reduces the operating power of the circulation pump 72 and the cooling fan 81 to further reduce heat dissipation energy consumption. Under heavy load, high speed, and frequent commutation conditions, the system automatically increases the coolant flow rate and cooling air volume to enhance the overall heat dissipation capacity and adapt to the motor's full operating requirements.

[0100] S07. Slow-release heat dissipation during shutdown: When the switched reluctance motor stops and is powered off, a large amount of residual heat remains inside the stator winding 2 and stator core 1. The control system delays the operation of the liquid cooling circulation system 7 and the air cooling circulation system 8 for a preset time to continuously remove the residual heat from the stator winding 2 and stator core 1, thus avoiding local high-temperature aging problems caused by the accumulation of residual heat. After the entire machine's heat dissipation and reset are completed, the heat dissipation system is shut down, waiting for the next start-up operation.

[0101] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A stator with a segmented heat dissipation structure, comprising a stator core (1) and a stator winding (2) disposed on the stator core (1), characterized in that, Also includes: The winding heat dissipation assembly (3) is in thermal contact with the stator winding (2) to carry away the heat of the stator winding (2); The iron core heat dissipation component (4) is attached to the outer peripheral wall of the stator iron core (1) to remove the heat of the stator iron core (1); Two pressure plate assemblies (5) are provided and are arranged opposite each other along the axial direction. The stator core (1), stator winding (2), winding heat dissipation assembly (3) and core heat dissipation assembly (4) are axially clamped and fixed between the two pressure plate assemblies (5). A cooling medium chamber is provided in the pressure plate assembly (5). The cooling medium chamber is in fluid communication with the winding heat dissipation assembly (3) and the core heat dissipation assembly (4) respectively. The cooling medium chambers of the two pressure plate assemblies (5) are connected to an external circulating cooling system to realize the circulating heat exchange of the cooling medium. The locking assembly (6) is inserted between the two pressure plate assemblies (5) and is used to lock and fix the two pressure plate assemblies (5).

2. The stator with a segmented heat dissipation structure according to claim 1, characterized in that, The stator core (1) includes an annular silicon steel sheet stack (11). The inner ring of the silicon steel sheet stack (11) is provided with a plurality of stator salient poles (12) arranged in an annular array along its axis. The outer ring of the silicon steel sheet stack (11) is provided with a plurality of end plates (13). The end plates (13) are provided with a first through hole (14). The stator winding (2) is sleeved on the stator salient poles (12) stacked in the same row. The end of the stator winding (2) is connected to a winding connecting plate (21), and the winding connecting plate (21) is provided with a second through hole (22). The locking assembly (6) passes through the correspondingly arranged first through hole (14) and second through hole (22).

3. The stator with a segmented heat dissipation structure according to claim 1, characterized in that, The cooling medium chambers inside the pressure plate assembly (5) are annularly spaced gas chambers (52) and liquid chambers (55), and the cooling medium inside the gas chambers (52) and the liquid chambers (55) is gas and liquid, respectively. The gas chambers (52) are connected to the iron core heat dissipation assembly (4), and the liquid chambers (55) are connected to the winding heat dissipation assembly (3).

4. The stator with a segmented heat dissipation structure according to claim 3, characterized in that, The winding heat dissipation assembly (3) includes a flow regulating valve (31) and two first radiator housings (37). The two first radiator housings (37) are sandwiched between the two sides of the same stator winding (2), and a flow regulating valve (31) is provided at each end of the first radiator housing (37). The inlet of the flow regulating valve (31) is connected to the cooling medium chamber of the pressure plate assembly (5) through the connecting pipe (32), and the outlet of the flow regulating valve (31) is connected to the two first radiator housings (37) through the connecting pipe (36).

5. The stator with a segmented heat dissipation structure according to claim 4, characterized in that, The flow regulating valve (31) adjusts the valve opening through the temperature sensing bulb (34) connected to it. The temperature sensing bulb (34) senses the temperature of the stator winding (2) through the heat-conducting plate (35) that is in contact with the stator winding (2). The higher the temperature of the stator winding (2), the greater the valve opening of the flow regulating valve (31) is adjusted by the temperature sensing bulb (34).

6. The stator with a segmented heat dissipation structure according to claim 5, characterized in that, The inner wall of the pressure plate assembly (5) is provided with a plurality of liquid chamber interfaces (56) that are connected to the liquid chamber (55). The connecting tube (32) is inserted into the liquid chamber interface (56) to realize the through connection between the liquid chamber (55) and the winding heat dissipation assembly (3).

7. The stator with a segmented heat dissipation structure according to claim 3, characterized in that, The iron core heat dissipation assembly (4) includes a second heat dissipation housing (41), and the two ends of the second heat dissipation housing (41) are respectively provided with mating slots (42). The pressure plate assembly (5) has an air chamber interface (53) on its end face facing the iron core heat dissipation assembly (4) that is connected to the air chamber (52). The mating slot (42) is inserted into the air chamber interface (53) to achieve a through connection between the air chamber (52) and the iron core heat dissipation assembly (4).

8. The stator with a segmented heat dissipation structure according to claim 3, characterized in that, The pressure plate assembly (5) is provided with an air passage connector (513) that is connected to the air chamber (52) and a liquid passage connector (514) that is connected to the liquid chamber (55). The air passage connector (513) and the liquid passage connector (514) are configured to be connected to the circulating cooling system. The pressure plate assembly (5) has a coaxially arranged annular outer cover (59) on the side facing the iron core heat dissipation assembly (4), and the outer cover (59) is fitted on the outside of the iron core heat dissipation assembly (4).

9. A switched reluctance motor, comprising a switched reluctance motor assembly, characterized in that, The stator in the switched reluctance motor assembly adopts the stator with a segmented heat dissipation structure as described in any one of claims 3 to 8; It also includes a circulating cooling system located outside the switched reluctance motor assembly, the circulating cooling system including a liquid cooling circulating system (7) and an air cooling circulating system (8). The liquid cooling circulation system (7) includes a storage tank (71), a circulation pump (72), and a gas-liquid heat exchanger (74). The circulation pump (72) pumps the coolant inside the storage tank (71) into the liquid chamber (55) of one of the pressure plate assemblies (5) through the liquid delivery pipe (73). The coolant inside the liquid chamber (55) passes through the winding heat dissipation assembly (3) and then flows into the return pipe (75) through the liquid chamber (55) of another pressure plate assembly (5). The coolant inside the return pipe (75) is cooled by the gas-liquid heat exchanger (74) and then flows back to the storage tank (71). The air-cooled circulation system (8) includes a cooling fan (81), the air inlet of which is connected to an air filter (82), and the exhaust end of the cooling fan (81) discharges cooling air into the air chamber (52) of one of the pressure plate assemblies (5) through an air inlet pipe (83). The cooling air inside the air chamber (52) passes through the iron core heat dissipation assembly (4) and then is discharged into the return air pipe (86) through the air chamber (52) of another pressure plate assembly (5). A bypass pipe (84) is connected to the air inlet pipe (83). The ends of the bypass pipe (84) and the return air pipe (86) are both connected to the two air inlets of the same three-way control valve (85). The exhaust port of the three-way control valve (85) is connected to the air inlet of the gas-liquid heat exchanger (74) through the heat exchanger air inlet pipe (87).

10. A heat dissipation method for a switched reluctance motor, characterized in that, Includes the following steps: S01, System Initialization: Before the motor starts, the controller controls the liquid cooling circulation system (7) and the air cooling circulation system (8) to complete the pre-start self-test and medium circulation initialization, so that the coolant fills the internal chamber of each winding heat dissipation component (3), the cooling air is pre-entered into the internal air duct of the iron core heat dissipation component (4), and each sensor and valve group component completes the reset and stands ready. S02, Real-time Zone Monitoring: During motor operation, the temperature of the corresponding stator winding (2) is collected in real time by the temperature sensing bulb (34) and heat conduction plate (35) of each winding heat dissipation component (3). Combined with the motor commutation timing signal, the real-time heating zone status of each stator winding (2) is determined, and the working condition monitoring signal is generated and transmitted to the controller. S03, Segmented adaptive liquid cooling: Based on the real-time zone temperature and operating conditions, the controller adaptively and independently adjusts the coolant flow rate of each segment winding heat dissipation component (3) through the flow regulating valve (31) corresponding to each stator winding (2). It increases the coolant flow rate of the high-heat zone that is powered on to enhance heat dissipation, and maintains a small flow rate circulation of the low-temperature zone that is powered off to achieve basic heat preservation and heat dissipation, thus completing the segmented on-demand precise liquid cooling of the stator winding (2). S04, Full-range iron core air cooling: While the liquid cooling partition heats up, the air cooling circulation system (8) continuously delivers cooling air to the iron core heat dissipation assembly (4). The cooling air flows in a meandering manner along the intersecting flow path inside the second heat dissipation shell (41), continuously carrying away the residual heat generated by the iron loss of the stator iron core (1) and balancing the overall temperature field of the motor. S05, Coordinated regulation of gas-liquid heat exchange: The controller monitors the airflow temperature of the air-cooled circulation loop in real time. The controller dynamically adjusts the mixing ratio of fresh air and motor heat exchange return air through the three-way control valve (85). When the return air temperature is within the acceptable range, the waste heat is used to assist the coolant in heat exchange and cooling. When the return air temperature exceeds the acceptable range, the high-temperature return air is directly discharged to ensure the stable heat exchange operation of the gas-liquid heat exchanger (74). S06, Full-condition closed-loop adaptive fine-tuning: During the entire operation of the motor, the controller forms a closed-loop control based on the collected winding temperature, core temperature, medium flow rate and airflow temperature parameters. According to different working conditions of the motor such as no-load, light load, heavy load and high speed, the controller adaptively adjusts the operating power of the liquid cooling circulation system (7) and the air cooling circulation system (8) to match the real-time heat load. S07. Slow release of residual heat during shutdown: After the motor stops and the power is cut off, the control system controls the liquid cooling circulation system (7) and the air cooling circulation system (8) to continue working for a preset time to remove the residual heat of the stator winding (2) and the stator core (1), and then shuts down the heat dissipation system after the whole machine is cooled down and reset.

Images