CN201075806Y - Electric vehicle mounted full air-proof internal liquid cooling and external wind cold type switch reluctance motor apparatus - Google Patents

Abstract

The utility model relates to an electromotion-vehicular fully-closed switch reluctance motor adopting a liquid cooling inside and air cooling outside type. The fully-closed switch reluctance motor comprises a closed shell, a stator, a rotor, a liquid cooling inside heat yield mechanism, an air cooling outside heat yield mechanism and a motor waterproof structure. The utility model is characterized in that: the heat yield mechanism ensures a stator winding to get double heat yield effects of liquid cooling inside and air cooling outside at the same time, thereby the problem that heat yield of the stator winding is not good is solved. In addition, special sealing devices are added and arranged at an opening of motor end closure, a shaft tip and a connecting wire port, etc, to achieve the goal of excellent motor waterproof effect. The electromotion-vehicular fully-closed switch reluctance machine adopting a liquid cooling inside and air cooling outside type of the utility model has the advantages of big torque, excellent dynamic property, energy-efficient performance, low noise and reliable stopping property. The technology can control the temperature rising effectively when the motor runs at high speed, more particularly control the temperature rising of the stator winding end. The technology has the effective waterproof performance to ensure the safe running of the motor in the circumstance of raining days or the seeper on the road surface, thereby work efficiency of the motor, the security of the motor and the protection grade are enhanced and the service life is prolonged.

Description

Fully enclosed internal liquid-cooled and external air-cooled switched reluctance motor device for electric vehicles

technical field

The utility model relates to the motor technology of an electric vehicle, in particular to a fully enclosed internal liquid-cooled and external air-cooled switched reluctance motor device for an electric vehicle. This is a vehicle-mounted drive motor with strong driving power, good heat dissipation performance, and good waterproof performance. When the drive motor runs at high speed, the cooling system can effectively control the temperature rise, especially the temperature rise at the end of the stator winding of the switched reluctance drive motor.

Background technique

At present, the types of electric motors driven by electric vehicles include asynchronous motors, permanent magnet brushless motors and switched reluctance motors. The torque fluctuation of the asynchronous motor is small, but the efficiency is low, especially in the low speed stage; the permanent magnet brushless motor has high efficiency, but the manufacturing process is complicated, there is demagnetization problem, the reliability is not high, so it is not ideal; the switched reluctance motor It has the advantages of solid structure, high reliability, high efficiency in the whole working range, low starting current and high starting torque, which are unmatched by other types of motors.

As a vehicle-mounted switched reluctance motor, there are currently two problems, one is the waterproof of the motor, and the other is the heat dissipation of the motor. If the electric vehicle adopts the front-wheel drive mode, the driving motor is placed at the front end of the vehicle body, and the motor is located at the transmission shaft, under the vehicle body. During the driving of the electric vehicle in rainy days, if there is water on the road, it may cause failure, and measures should be taken. Waterproof treatment to improve the protection level of the motor. In addition, if the heat dissipation ribs of the driving motor are parallel to the axial direction of the car wheel, the wind direction is along the front of the car body and perpendicular to the axial direction of the motor during driving, that is, the wind moves along the radial direction of the motor, resulting in poor heat dissipation of the motor. uniform. If the heat dissipation ribs on the motor base are along the motor axis, the forward heat dissipation ribs of the motor will receive the wind better, but it will affect the air volume of the heat dissipation ribs behind it, which will also cause uneven heat dissipation of the motor. Experiments have shown that if the car is completely driven, the wind resistance formed by the relative air movement will dissipate heat from the motor. When the electric car stops running, the heat dissipation of the motor will be completely based on conduction and radiation. The heat dissipation efficiency is low, and the temperature of the motor will easily rise. Relatively high, affecting the working efficiency and service life of the drive motor. The switched reluctance motor has its special structure—the winding is concentrated, so there is often the problem of poor heat dissipation of the stator winding, especially its end, and the resulting defect is that as the speed increases or the motor runs for a long time, it will A large temperature rise will reduce the working efficiency of the motor, and long-term operation will cause the insulation of the stator winding to age and reduce the service life.

Contents of the invention

The purpose of the utility model is to provide a fully enclosed internal liquid-cooled and external air-cooled switched reluctance motor device for an electric vehicle. This technology can solve the heat dissipation and waterproof problems of the vehicle-mounted switched reluctance motor.

The technical scheme of the utility model is as follows:

Heat dissipation design of fully enclosed internal liquid-cooled and external air-cooled switched reluctance motors for electric vehicles:

Behind the switched reluctance motor, there is a wind deflector facing the front of the vehicle.

On the inside surface of the sealed casing, a cooling cavity and a casing heat pipe are arranged.

The stator winding ends are designed according to the stator tooth profile.

Cooling liquid ring pipes fixed by A and B type heat conduction wedges and connected with the cold liquid pipes and the casing heat pipes are arranged at the front and rear ends of the stator windings.

The A-type heat conduction wedge is in the shape of a hook with a fixed bottom surface, which is inserted into the gap between the stator winding and the end of the stator tooth, and the upper end is hooked on the cold liquid ring pipe. The B-type thermal wedge is in the shape of a two-wing hook with a fixed bottom surface. The fixed bottom surface is inserted into the gap between the stator winding and the end of the stator tooth. The two wings at the upper end hook the cold liquid ring tube terminal.

Waterproof structural design of fully enclosed internal liquid-cooled and external air-cooled switched reluctance motors for electric vehicles:

There are sealing gaskets, sealing rings and waterproof rings on the cover opening of the motor end cover, the two shaft ends of the rotor, the periphery of the motor junction box and the wire inlet, the water inlet and outlet ports, and the closed position sensor. material.

The utility model provides a special heat dissipation design for the switched reluctance motor, which enables the motor to obtain double heat dissipation effects of internal liquid cooling and external air cooling. . A heat dissipation cavity and a casing heat pipe wrapping the stator winding are arranged on the inner surface of the sealed casing, and the flowing gas in the heat dissipation chamber and the cooling liquid in the casing heat pipe can dissipate heat from the stator winding. The heat conduction wedge transfers the heat inside the winding end to the cooling liquid ring pipe to realize heat dissipation at the front and rear ends of the stator winding, thereby solving the problem of poor heat dissipation of the stator winding. Since the end of the stator winding is designed according to the stator tooth shape, the end winding is shorter, so copper is saved. The function of the windshield is to circulate the natural wind entering the vehicle, so that the natural wind can cool the motor along the windshield, expand the air-cooled area, and obtain heat dissipation at the front of the motor casing, as well as at the rear of the casing. , quickly dissipate the heat on the motor. Therefore, the heat dissipation structure of the utility model can effectively reduce the temperature rise of the stator winding and the winding end of the switched reluctance motor, achieve uniform cooling, and improve cooling efficiency. In addition, the waterproof structure of the motor of the utility model can effectively achieve the purpose of waterproofing the motor.

The electric vehicle-mounted fully enclosed switched reluctance motor of the utility model has large torque, good dynamic performance, high efficiency and energy saving, low noise, and reliable airtightness. temperature rise. It can be effectively waterproof and ensure the safe operation of the motor in rainy days or when there is water on the road, thereby improving the working efficiency of the motor, the safety performance and protection level of the motor, and prolonging its service life.

Description of drawings

Figure 1 three-dimensional schematic diagram of the motor;

Figure 2 schematic diagram of the motor;

Figure 3A-A sectional view (left view);

Fig. 4B-B sectional view (left view)

Fig. 5C-C sectional view (left view);

Figure 6D-D cross-sectional view (left view);

Figure 7 Axial sectional view of the motor;

Figure 8 is a schematic diagram of cooling at the stator end;

Figure 9A type thermal wedge left view;

Fig. 10A front view of heat conduction wedge;

Fig. 11A top view of heat conduction wedge;

Figure 12A schematic diagram of three-dimensional installation of heat conduction wedge;

Fig. 13B type thermal wedge top view;

Figure 14B-type heat conduction wedge front view;

Fig. 15 three-dimensional installation diagram of type B heat conduction wedge;

Figure 16 is a schematic diagram of the direction of cooling fluid in the heat pipe of the casing;

Figure 17 The overall schematic diagram of the heat dissipation at the end of the stator.

Detailed ways

Describe according to accompanying drawing 1-17 below:

Fully enclosed internal liquid-cooled and external air-cooled switched reluctance motors for electric vehicles include front end cover 1, rear end cover 2, interfaces 3, 7, 23 and 24, cooling liquid ring pipes 4 and 6, casing heat pipe 5, motor Junction box 8, sealed casing 9, B-type thermal wedge 10, stator winding 11, rotor 12, stator 13, A-type thermal wedge 14, windshield 15, waterproof rubber pad and sealing ring 16, cooling liquid pipes 17 and 18 , Closed position sensor 19, rotor sealing filler 20, waterproof ring 21 and machine base 22.

Heat dissipation design of fully enclosed switched reluctance motor with internal liquid cooling and external air cooling for electric vehicles:

Behind the switched reluctance motor, an arc-shaped windshield 15 facing the front of the vehicle is provided.

On the inner surface of the aluminum sealed casing 9, a spiral cooling chamber and casing heat pipes 5 are arranged.

The stator winding head 11 is designed according to the stator tooth profile.

At the front end of the stator winding 11, there is a cooling liquid ring pipe 4 fixed by A and B type heat conducting wedges 14, 10 and connected to the cooling liquid pipe 18 and the casing heat pipe 5. At the rear end of the stator winding 11, there is a cooling liquid ring pipe 6 fixed by A and B type heat conducting wedges 14, 10 and connected with the cooling liquid pipe 17 and the casing heat pipe 5.

The A-type heat conduction wedge 14 is in the shape of a hook with an arc-shaped fixed bottom surface, which is inserted into the gap between the stator winding 11 and the tooth ends of the stator 13, and the upper end is hooked on the cold liquid ring pipes 4,6. The B-type heat conducting wedge 10 is in the shape of a two-wing hook with an arc-shaped fixed bottom surface. The arc-shaped fixed bottom surface is inserted into the gap between the stator winding 11 and the tooth ends of the stator 13, and the upper two wings hook the terminals of the cold liquid ring pipes 4 and 6. In this way, while the A and B-type heat conduction wedges play a fixing role, they also transfer heat to the cooling liquid ring pipes 4 and 6 to realize heat dissipation.

The cooling liquid passes through the cooling liquid pipe 18 and the cooling liquid ring pipe 4 , then enters the casing heat pipe 5 , and then enters the cooling liquid ring pipe 6 at the rear end of the stator winding 11 , and discharges the heat of the motor through the cooling liquid pipe 17 . (This thermal energy can be introduced into the cabin for heating in winter.)

Coolant can be oil or water. If it is water, it has high requirements on water quality. Compared with ordinary cooling water, in addition to meeting the requirements of no corrosion and no scaling, it must also have good electrical insulation properties.

Waterproof structural design of fully enclosed internal liquid-cooled and external air-cooled switched reluctance motors for electric vehicles:

Sealing gaskets and sealing rings 16 are provided at the cover openings of the motor end covers 1 and 2, the two shaft ends of the rotor 12, the periphery of the motor junction box 8, the wire inlet, the water inlet and outlet ports, and the closed position sensor 19 to ensure water resistance. The ring 21 and the rotor 12 are provided with sealing fillers 20 .

Claims (1)

1. An electric vehicle-mounted fully enclosed internal liquid-cooled, external air-cooled switched reluctance motor device, comprising a front cover (1), a rear end cover (2), interfaces (3, 7, 23 and 24), and a cooling liquid ring Tube (4, 6), casing heat pipe (5), motor junction box (8), sealed casing (9), B-type heat conduction wedge (10), stator winding (11), rotor (12), stator ( 13), A-type heat conduction wedge (14), windshield (15), waterproof rubber pad and sealing ring (16), cooling liquid pipe (17, 18), closed position sensor (19), rotor sealing filler ( 20), the waterproof ring (21) and the machine base (22); it is characterized in that: the heat dissipation design of the fully enclosed internal liquid-cooled and external air-cooled switched reluctance motor on the electric vehicle: behind the switched reluctance motor, there is a A windshield (15); on the inner surface of the sealed casing (9), a cooling cavity and a casing heat pipe (5) are arranged; the end of the stator winding (11) is designed according to the stator tooth shape; The front end of the stator winding (11) is provided with a cold liquid ring pipe (4) fixed by A and B type heat conduction wedges (14, 10) and connected with the cold liquid pipe (18) and the casing heat pipe (5); At the rear end of the stator winding (11), there is a cooling liquid ring pipe (6) fixed by A and B type heat conducting wedges (14, 10) and connected to the cooling liquid pipe (17) and the casing heat pipe (5) ; The A-type heat conduction wedge (14) is in the shape of a hook with a fixed bottom surface, the fixed bottom surface is inserted into the gap between the stator winding (11) and the tooth end of the stator (13), and the upper end is hooked on the cold liquid ring pipe (4, 6); The B-type thermal wedge (10) is in the shape of a two-wing hook with a fixed bottom surface, the fixed bottom surface is inserted into the gap between the stator winding (11) and the end of the stator teeth (13), and the upper two wings hook the cold liquid ring pipe (4, 6) terminal; Waterproof structural design of fully enclosed internal liquid-cooled and external air-cooled switched reluctance motors for electric vehicles: At the cover openings of the motor end covers (1) and (2), the two shaft ends of the rotor (12), the periphery of the motor junction box (8), the wire inlet, the water inlet and outlet ports, and the closed position sensor (19) A sealing gasket, a sealing ring (16), and a waterproof ring (21) are provided, and the rotor (12) is provided with a sealing filler (20).

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