CN217563439U

CN217563439U - Switched reluctance motor

Info

Publication number: CN217563439U
Application number: CN202221655232.7U
Authority: CN
Inventors: 张见宝; 付强; 刘福刚; 易四明
Original assignee: Shandong Wind Amperex Technology Ltd
Current assignee: Shandong Wind Amperex Technology Ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-10-11
Anticipated expiration: 2032-06-29

Abstract

The utility model discloses a switched reluctance motor, include: a housing; the cooling structure comprises a motor body, wherein a cooling channel is arranged between the motor body and a shell, the motor body comprises a main shaft and a stator core, the stator core is sleeved on the main shaft, and the stator core is provided with stator ventilation grooves which extend to two ends along the axial direction of the stator core; the inner fan is in transmission connection with the main shaft; the air guide sleeve is arranged between the inner fan and the stator iron core, and is provided with an air guide channel communicated with the stator ventilation groove; the cooling channel, the stator ventilating groove and the flow guide channel form an inner wind path system which acts on the inside of the shell for heat dissipation. When the main shaft rotates, the inner fan is driven to suck hot air in the stator ventilation groove, and the hot air enters the cooling channel along the flow guide channel and then is cooled and circulated. The inner air path system can perform circulating heat dissipation inside the switched reluctance motor. The service life of the switched reluctance motor is prolonged. The internal fan of the switched reluctance motor does not need to be connected with external equipment for cooling.

Description

Switched reluctance motor

Technical Field

The utility model relates to the technical field of electric machines, in particular to switched reluctance motor.

Background

The switched reluctance motor is a type of speed-adjustable motor developed after a dc motor and a brushless dc motor. The composite material is widely applied to the fields of household appliances, aviation, aerospace, electronics, machinery, electric vehicles and the like. The switched reluctance motor has the design requirements of high power, light weight and long service life, namely the switched reluctance motor needs to meet the requirement of high power density. The high power density design results in a high thermal load on the switched reluctance motor, i.e., a large amount of heat energy is generated during operation. If the heat energy can not be taken away in time, serious problems of insulation reduction, insulation breakdown, coil damage and the like of the switched reluctance motor can be directly caused. Therefore, the heat dissipation problem of the switched reluctance motor is very important.

At present, the switched reluctance motor with high power density is cooled by a common liquid cooling mode, but the liquid cooling mode easily causes liquid leakage, influences the use safety of the motor and simultaneously causes potential safety hazards to the use environment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a safer switched reluctance motor.

The utility model provides a switched reluctance motor, include:

a housing;

the motor body is accommodated in the shell, a cooling channel is arranged between the motor body and the shell, the motor body comprises a main shaft and a stator core, the stator core is sleeved on the main shaft and provided with stator ventilation grooves extending to two ends along the axial direction of the stator core, and one ends of the stator ventilation grooves are communicated with one end of the cooling channel;

the inner fan is arranged on one side of the stator core and is in transmission connection with the main shaft;

the air guide sleeve is arranged between the inner fan and the stator iron core, and is provided with an air guide channel communicated with the stator ventilating groove, and the air guide channel is communicated with the other end of the stator ventilating groove and the other end of the cooling channel; the cooling channel, the stator ventilation groove and the flow guide channel form an inner air path system which acts on the shell to dissipate heat.

Further, stator core's inboard be equipped with the coaxial pivoted rotor core of main shaft, rotor core is equipped with along its axial extension to the rotor ventilation groove at both ends, water conservancy diversion passageway intercommunication the rotor ventilation groove, interior wind path system includes the rotor ventilation groove.

Further, the rotor ventilation slot is opposite to the stator ventilation slot.

Further, the switched reluctance motor further comprises an external air path system for radiating heat outside the shell.

Further, the outer wind path system comprises an outer fan and a fan cover, the outer fan is coaxially arranged on the main shaft, the outer fan and the main shaft coaxially rotate, the fan cover is arranged outside the outer fan, and the fan cover is provided with an opening for conveying air.

Furthermore, a plurality of heat dissipation ribs are arranged on the outer surface of the shell, a heat dissipation channel is arranged between every two adjacent heat dissipation ribs, and the opening faces one end of the heat dissipation channel.

Furthermore, stator pressing plates are arranged at two ends of the stator core, the stator pressing plates press and hold end faces of two ends of the stator core, and the flow guide cover is arranged on the stator pressing plates.

Furthermore, rotor pressing plates are arranged at two ends of the rotor core, and the end faces of the two ends of the rotor core are pressed and held by the rotor pressing plates.

Furthermore, the cooling channels are arranged in a plurality and distributed around the motor body.

Further, a through groove is formed between the motor body and the shell, the through groove extends along the axial direction of the motor body, and the through groove forms the cooling channel.

According to the technical scheme, the invention has at least the following advantages and positive effects: when the main shaft rotates, the inner fan is driven to suck hot air in the stator ventilating groove, and the hot air is gathered on the flow guide cover and then enters the cooling channel along the flow guide channel to be cooled and circulated. The inner air path system can circularly dissipate heat of hot air in the switched reluctance motor. Effectively prolonging the service life of the switched reluctance motor. Through the inside interior wind path system of switched reluctance motor for switched reluctance motor carries out in succession from the heat dissipation, need not to connect external equipment and cools off, continuous cooling. Simple structure, compact volume, reduce cost has improved the motor security performance.

Drawings

Fig. 1 is a schematic perspective view of a switched reluctance motor according to an embodiment.

Fig. 2 is a radial cross-sectional view of a central portion of a switched reluctance motor according to an embodiment.

Fig. 3 isbase:Sub>A sectional view taken alongbase:Sub>A-base:Sub>A in fig. 2.

The reference numerals are explained below: 100. a switched reluctance motor; 10. a motor body; 101. a main shaft; 102. a stator core; 103. a stator pressing plate; 104. a stator ventilation slot; 105. a rotor core; 106. a rotor pressing plate; 107. a rotor ventilation slot; 108. a cooling channel; 20. a housing; 201. heat dissipation ribs; 30. a cooling system; 301. an inner air path system; 3011. an inner fan; 3012. a pod; 302. an outer air path system; 3021. an external fan; 3022. a fan cover.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.

In the description of the present application, it is to be understood that the indications of directions or positional relationships (such as up, down, left, right, front, rear, and the like) in the embodiments shown in the drawings are merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated. These descriptions are appropriate when the elements are in the positions shown in the drawings. If the description of the positions of these elements changes, the indication of these directions changes accordingly.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The present invention will be further explained in detail with reference to the accompanying drawings.

Referring to fig. 1, 2 and 3, a switched reluctance motor includes a motor body 10, a housing 20 and a cooling system 30. The housing 20 is disposed outside the switched reluctance motor 100 and supports and protects components inside the switched reluctance motor 100. The cooling system 30 is used for air-cooling and heat dissipation of the housing 20 and the motor body 10. The heat generated during the operation of the switched reluctance motor 100 and the heat on the inner surface and the outer surface of the shell 20 are taken away, the condition that the switched reluctance motor 100 is damaged due to overhigh temperature generated during the operation is reduced, the service life of the switched reluctance motor 100 is prolonged, and the safety during the use is improved.

The housing 20 is disposed outside the switched reluctance motor 100, and generally adopts a metal material to improve the strength of the switched reluctance motor 100. The outer surface of the housing 20 is provided with a heat dissipation rib 201 for dissipating heat when the switched reluctance motor 100 operates.

The motor body 10 includes a main shaft 101, a stator core 102, and a rotor core 105. The main shaft 101 is rotatably provided inside the switched reluctance motor 100, and the stator core 102 and the rotor core 105 are coaxially provided on the main shaft 101. Wherein, rotor core 105 is rotatably disposed on main shaft 101, and stator core 102 is sleeved outside rotor core 105.

Referring to fig. 3, two ends of the stator core 102 are provided with stator pressing plates 103 for pressing, and two ends of the rotor core 105 are provided with rotor pressing plates 106 for pressing. Stator pressing plate 103 and rotor pressing plate 106 both function to press and fix stator core 102 and rotor core 105.

Referring to fig. 2 and 3, stator ventilation slots 104 extending to both ends in the axial direction are formed in the stator core 102, and rotor ventilation slots 107 extending to the head and tail ends are formed in the outer surface of the rotor core 105 in the axial direction. The stator ventilation slots 104 and the rotor ventilation slots 107 are oppositely disposed. When the switched reluctance motor 100 operates, the rotor core 105 is driven by the main shaft 101 to rotate relative to the stator core 102, and air flow is formed between the stator ventilation slots 104 and the rotor ventilation slots 107, so that air is circulated inside the switched reluctance motor 100, and the purpose of heat dissipation is achieved.

The cooling system 30 includes an inner air path system 301, an outer air path system 302, and heat dissipation ribs 201.

The heat dissipating ribs 201 are provided on the outer surface of the housing 20. The heat dissipation ribs 201 are provided in plurality. For dissipating heat during operation of the switched reluctance motor 100.

The cooling system 30 includes an inner fan 3011 and a cowling 3012. The inner fan 3011 is coaxially disposed on the main shaft 101, and the inner fan 3011 rotates coaxially with the main shaft 101. And the inner fan 3011 is provided on one side of the stator core 102. The air guide sleeve 3012 is sleeved on the main shaft 101. The shroud 3012 is provided between the inner fan 3011 and the stator core 102. In this embodiment, one end of the air guide sleeve 3012 is disposed on the stator pressing plate 106, and the other end of the air guide sleeve 3012 is in clearance fit with the inner fan 3011. In other embodiments, the shroud 3012 may be snapped onto the stator pressure plate 106.

The air guide sleeve 3012 is provided with an air guide channel communicated with the stator ventilation slot 104 and the rotor ventilation slot 107. When the switched reluctance motor 100 operates, the main shaft 101 rotates to drive the inner fan 3011 to rotate immediately, and then air in the stator ventilation slot 104 and the rotor ventilation slot 107 can be sucked, so that the air is gathered in the air guide cover 3012 along the air guide channel, and the stator ventilation slot 104 and the rotor ventilation slot 107 supplement air in the switched reluctance motor 100 to enter the stator ventilation slot 104 and the rotor ventilation slot 107 due to changes of air flow and pressure, and further heat dissipation is achieved. Meanwhile, when the switched reluctance motor 100 starts to operate, heat dissipation is carried out along with the switched reluctance motor, and heat generated during operation is effectively reduced due to continuous heat dissipation. Meanwhile, heat can be dissipated without connecting heat dissipating equipment from the outside.

Referring to fig. 3, a through groove is formed between the housing 20 and the motor body 10, and the through groove extends along an axial direction of the motor body 10. Cooling channels 108 for cooling the hot gas are provided in the through slots. In this embodiment, the through grooves enclose a cooling channel. In other embodiments, the cooling channel may also be a cooling pipeline, and the cooling pipeline is disposed in the through groove.

One end of the guide passage is communicated with the stator ventilation groove 104 and the rotor ventilation groove 107 respectively, and the other end of the guide passage is communicated with the cooling passage 108. With the through slots enclosing the cooling gallery 108, the cooling gallery 108 is adjacent the inner surface of the housing 20. The stator ventilation groove 104, the rotor ventilation groove 107, the guide passage, and the cooling passage form an inner air path system 301 for dissipating heat from the inside of the casing 20. In operation, air flow along cooling passage 108 is circulated within housing 20 by air flow within stator ventilation slots 104 and rotor ventilation slots 107 to dissipate heat. The number of the cooling channels 108 is multiple, and the number of the cooling channels 108 is four in the embodiment, so that the structure is reasonable, and the heat dissipation requirement can be met.

Referring to fig. 3, the outer air path system 302 includes an outer fan 3021 and a fan cover 3022, and the outer fan 3021 is disposed outside the motor body 10. The outer fan 3021 is coaxially mounted on the main shaft 101, and the outer fan 3021 rotates coaxially with the main shaft 101. The rotary fan cover 3022 is fitted to the outside of the outer fan 3021, and the fan cover 3022 is provided on the non-driving end side of the switched reluctance motor 100. The end face of the air inlet of the fan cover 3022 is formed into a mesh structure, which not only allows air to flow but also facilitates air suction.

A heat dissipation channel is formed between two adjacent heat dissipation ribs 201. The fan cover 3022 is provided with an opening for air to flow through, and the direction of the opening is toward the heat dissipation passage of the heat dissipation rib 201. When the switched reluctance motor 100 is started, the outer fan 3021 is driven by the main shaft 101 to rotate along with the main shaft, air outside the switched reluctance motor 100 is sucked into the fan cover 3022, and then flows out along the opening and blows towards the heat dissipation rib 201 under the air flow and atmospheric pressure, so that the heat dissipation rib 201 is cooled by air.

The above is only the feasible embodiment of the preferred of the present invention, not limiting the protection scope of the present invention, and all the changes of the equivalent structure made by the contents of the description and the drawings of the present invention are included in the protection scope of the present invention.

Claims

1. A switched reluctance machine, comprising:

a housing;

the air guide sleeve is arranged between the inner fan and the stator iron core, an air guide channel communicated with the stator ventilation groove is arranged on the air guide sleeve, and the air guide channel is communicated with the other end of the stator ventilation groove and the other end of the cooling channel; the cooling channel, the stator ventilation groove and the flow guide channel form an inner air path system which acts on the shell to dissipate heat.

2. The switched reluctance motor of claim 1, wherein the stator core has a rotor core coaxially rotating with the main shaft on the inner side, the rotor core has rotor ventilation slots extending to both ends along the axial direction of the rotor core, the flow guide channel communicates with the rotor ventilation slots, and the inner air passage system includes the rotor ventilation slots.

3. The switched reluctance machine of claim 2, wherein the rotor ventilation slots are disposed opposite the stator ventilation slots.

4. The switched reluctance motor of claim 1, further comprising an external air path system for dissipating heat outside the housing.

5. The switched reluctance motor of claim 4, wherein the outer air path system comprises an outer fan and a fan housing, the outer fan is coaxially disposed on the main shaft and rotates coaxially with the main shaft, the fan housing is disposed outside the outer fan, and the fan housing is provided with an opening for delivering air.

6. The switched reluctance motor of claim 5, wherein the outer surface of the housing is provided with a plurality of heat dissipation ribs, a heat dissipation channel is formed between two adjacent heat dissipation ribs, and the opening faces one end of the heat dissipation channel.

7. The switched reluctance motor of claim 1, wherein the stator pressing plates are disposed at two ends of the stator core, the stator pressing plates press end surfaces of the two ends of the stator core, and the air guide covers are disposed on the stator pressing plates.

8. The switched reluctance motor of claim 2, wherein rotor pressing plates are provided at both ends of the rotor core, and the rotor pressing plates press and hold both end faces of the rotor core.

9. The switched reluctance machine of claim 1, wherein the cooling channels are provided in plurality and distributed around the machine body.

10. The switched reluctance machine of claim 9, wherein a through slot is provided between the machine body and the housing, the through slot extending in an axial direction of the machine body, the through slot forming the cooling passage.