CN205092731U - Driving motor and have its vehicle - Google Patents

Abstract

The utility model provides a driving motor and a vehicle thereof. The driving motor includes a rotor iron core and a stator iron core arranged around the rotor iron core. The driving motor also includes a gas circulation channel passing through the rotor iron core and the stator iron core. and a gas driver arranged in the gas circulation channel, the gas driver drives gas to circulate in the gas circulation channel. The drive motor in the utility model solves the problem of poor heat dissipation of the motor in the prior art.

Description

Drive motor and vehicle with same

technical field

The utility model relates to the field of vehicles, in particular to a driving motor and a vehicle with the same.

Background technique

With the continuous development and maturity of electric vehicles, the requirements of electric vehicles for driving motors are also getting higher and higher. At present, the permanent magnet synchronous motor has become the first choice for electric vehicle drive motors due to its advantages of high efficiency and high energy density. Since the driving motors of automobiles often need to provide high power and torque density, the motors are seriously heated.

At present, most electric vehicle drive motors adopt a water-cooled structure of the stator shell, which uses the heat conduction of the iron core to cool the stator of the motor; some motors also adopt a forced air-cooled structure, which uses air convection to cool the motor.

Electric vehicle drive motors are generally required to have high power density and high torque density, which will lead to serious heating of the motor. In order to increase the heat dissipation capacity of the motor, the methods used in the prior art mainly include the following:

(1) Water-cooled structure of the chassis:

With this structure, the stator casing is divided into an inner layer and an outer layer, and there is a waterway between the inner and outer layers. The waterway is usually divided into two types, one is an S-shaped waterway, and the other is a surrounding waterway. With this cooling method, since the stator and the casing are closely attached, the cooling effect on the stator is very good.

However, since there is an air gap between the stator and the rotor, the air in the air gap is equivalent to a heat insulation layer at this time, and the heat in the rotor can only be conducted to the surroundings through heat radiation, resulting in the possibility of heat accumulation in the rotor. As the core material of the permanent magnet motor, the magnetic steel is installed on the rotor. As the temperature of the rotor increases, the performance of the magnetic steel will decrease. When the temperature exceeds a certain limit, the magnetic steel will fail, resulting in damage to the entire motor. .

(2) Forced air cooling structure:

With this cooling method, the motor must be open, that is, there must be air circulation inside and outside the motor, which greatly reduces the protection level of the motor, which cannot meet the requirements in many occasions. In addition, with the air cooling method, the heat dissipation of the motor core is completely exchanged with the surrounding air through heat radiation, and the heat dissipation efficiency is limited, which will limit the rated and maximum operating points of the motor.

Utility model content

The main purpose of the utility model is to provide a driving motor and a vehicle with it, so as to solve the problem of poor heat dissipation of the motor in the prior art.

In order to achieve the above object, according to one aspect of the present invention, a driving motor is provided, which includes a rotor core and a stator core arranged around the rotor core, and the driving motor also includes a gas passing through the rotor core and the stator core. The circulation channel and the gas driving part arranged in the gas circulation channel, the gas driving part drives the gas to circulate and flow in the gas circulation channel.

Further, the gas circulation channel includes a first ventilation hole opened on the rotor core and a second ventilation hole opened on the stator core, the first ventilation hole passes through the first end of the rotor core along its axial direction and At the second end, the second ventilation hole passes through the first end and the second end of the stator core along its axial direction.

Further, the rotor core includes a first rotor part and a second rotor part arranged at intervals along its axial direction, the stator iron core includes a first stator part and a second stator part arranged at intervals along its axial direction, and the gas circulation channel further It includes a first communication gap between the first rotor part and the second rotor part and a second communication gap between the first stator part and the second stator part; wherein, the first communication gap and the second communication gap are mutually It communicates with and communicates with the first ventilation hole and the second ventilation hole.

Further, the gas driver is arranged in the first communication gap and/or the second communication gap, so that the gas in the first ventilation hole flows into the second ventilation hole after passing through the first communication gap and the second communication gap.

Further, the gas driver is arranged in the first communication gap, the gas driver includes a plurality of air guide baffles connecting the first rotor part and the second rotor part, and the plurality of air guide baffles are spaced apart along the circumference of the rotor core. Arranged, a wind guiding gap is formed between two adjacent wind guiding partitions.

Further, the air guide baffle extends radially of the rotor core.

Further, the driving motor further includes a wind-shielding ring, and the wind-shielding ring is arranged on the outer periphery of the second communication gap.

Further, the driving motor also includes a casing and a front end cover and a rear end cover that block the casing, and the rotor core and the stator core are all arranged in the casing; A first gas containing cavity between the iron core and the stator core, and a second gas containing cavity formed between the casing, the rear end cover, the rotor core and the stator core.

Further, the drive motor also includes a casing for accommodating the rotor core and the stator core, and a cooling water passage is arranged in the casing wall.

According to another aspect of the present utility model, a vehicle is provided, including a driving motor, and the driving motor is the above-mentioned driving motor.

The driving motor in the utility model includes a rotor core and a stator core arranged around the rotor core. Since the driving motor includes a gas circulation channel passing through the rotor core and the stator core, and the gas circulation channel is provided with a gas In this way, the gas driver can drive the gas in the gas circulation channel to flow in the gas circulation channel, and the gas flows through the rotor core and the stator core in the gas circulation channel, and then can be greatly improved under the action of the air flow. The rotor core and the stator core are cooled efficiently, which improves the heat dissipation capacity of the motor.

The drive motor in the utility model is simple in structure and easy to operate, improves the cooling effect on the rotor core and stator core, solves the problem of poor heat dissipation of the motor in the prior art, and greatly reduces the temperature of the motor. As a result, the rated operating point of the motor is increased, the steady-state operating efficiency of the motor is improved, and the reliable operation of the motor is ensured.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 shows a schematic structural view of an embodiment of a drive motor according to the present invention;

Fig. 2 shows a schematic structural view of the rotor core in Fig. 1;

Fig. 3 shows a schematic structural view of the stator core in Fig. 1;

Fig. 4 shows a structural diagram of the cooperative connection of the wind guide baffle in Fig. 1 with the first rotor end plate and the second rotor end plate; and

Fig. 5 shows a structural schematic diagram of the cooperative connection between the wind guide baffle and the first rotor end plate in Fig. 4 .

Wherein, the above-mentioned accompanying drawings include the following reference signs:

10. Rotor core; 11. First ventilation hole; 12. First rotor part; 13. Second rotor part; 14. First communication gap; 15. First rotor end plate; 16. Second rotor end plate; 20. Stator core; 21. Second ventilation hole; 22. First stator part; 23. Second stator part; 24. Second communication gap; 25. First stator end plate; 26. Second stator end Plate; 30, air guide partition; 31, air guide gap; 40, wind shield ring; 50, casing; 51, cooling water passage; 60, front end cover; 70, rear end cover; 81, first gas containing cavity ; 82, the second gas containing chamber; 90, the rotating shaft.

detailed description

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

The present embodiment provides a driving motor, please refer to FIGS. The gas circulation channel on the stator core 20 and the gas driver arranged in the gas circulation channel, the gas driver drives gas to circulate in the gas circulation channel.

The driving motor in this embodiment includes a rotor core 10 and a stator core 20 arranged around the rotor core 10. Since the driving motor includes a gas circulation channel passing through the rotor core 10 and the stator core 20, and the gas circulation A gas driver is arranged in the channel, so that the gas driver can drive the gas in the gas circulation channel to flow in the gas circulation channel, and the gas flows through the rotor core 10 and the stator core 20 in the gas circulation channel, and then can be Under the action of the airflow, the rotor core 10 and the stator core 20 are cooled to a greater extent, which improves the heat dissipation capacity of the motor.

The drive motor in this embodiment is simple in structure and easy to operate, improves the cooling effect on the rotor core 10 and the stator core 20, solves the problem of poor heat dissipation of the motor in the prior art, and greatly reduces the temperature of the motor. The temperature rise of the motor increases the rated operating point of the motor, improves the steady-state operating efficiency of the motor, and ensures the reliable operation of the motor.

In this embodiment, as shown in Figures 1 to 3, the gas circulation channel includes a first ventilation hole 11 opened on the rotor core 10 and a second ventilation hole 21 opened on the stator core 20, the first ventilation hole The hole 11 passes through the first end and the second end of the rotor core 10 along the axial direction thereof, and the second ventilation hole 21 passes through the first end and the second end of the stator core 20 along the axial direction thereof.

Since the rotor core 10 and the stator core 20 are provided with ventilation holes, in this way, a gas circulation channel passing through the rotor core 10 and the stator core 20 can be formed in the driving motor, and the gas flows through the rotor in the gas circulation channel. The iron core 10 and the stator iron core 20 can further cool the rotor iron core 10 and the stator iron core 20 to a greater extent, thereby improving the heat dissipation capacity of the motor.

In addition, since the first ventilation hole 11 penetrates the first end and the second end of the rotor core 10 in the axial direction thereof, the second ventilation hole 21 penetrates the first end and the second end of the stator core 20 in the axial direction thereof. Two ends, in this way, the gas circulation channel can penetrate the rotor core 10 and the stator core 20 to a greater extent, thereby cooling the rotor core 10 and the stator core 20 to a greater extent.

Preferably, the first ventilation hole 11 extends along the axial direction of the rotor core 10 , and the second ventilation hole 21 extends along the axial direction of the stator core 20 . In this way, cooling of the rotor core 10 and the stator core 20 is facilitated.

In this embodiment, the rotor core 10 includes a first rotor part 12 and a second rotor part 13 arranged at intervals along its axial direction, and the stator core 20 includes a first stator part 22 and a second stator part 22 arranged at intervals along its axial direction. Two stator parts 23, the gas circulation channel also includes a first communication gap 14 between the first rotor part 12 and the second rotor part 13 and a second communication gap between the first stator part 22 and the second stator part 23 Gap 24 ; wherein, the first communication gap 14 and the second communication gap 24 communicate with each other and communicate with the first ventilation hole 11 and the second ventilation hole 21 .

In this embodiment, by making the rotor core 10 include the first rotor part 12 and the second rotor part 13, and making the stator core 20 include the first stator part 22 and the second stator part 23, the rotor core 10 and the stator core can be made The core 20 is evenly divided into two sections, thereby forming a first communication gap 14 and a second communication gap 24 , allowing gas to flow through the first communication gap 14 and the second communication gap 24 , which can further improve the cooling effect.

In this embodiment, the gas driver is arranged in the first communication gap 14 and/or the second communication gap 24, so that the gas in the first ventilation hole 11 flows through the first communication gap 14 and the second communication gap 24 and enters Inside the second ventilation hole 21. In this way, the flow of gas in the gas circulation channel can be ensured, and the cooling effect on the rotor core 10 and the stator core 20 can be greatly improved.

In this embodiment, as shown in FIG. 4 and FIG. 5 , the gas driver is arranged in the first communication gap 14 , and the gas driver includes a plurality of air guide baffles connecting the first rotor part 12 and the second rotor part 13 30 , a plurality of air guiding baffles 30 are arranged at intervals along the circumferential direction of the rotor core 10 , and an air guiding gap 31 is formed between two adjacent air guiding baffles 30 .

The rotor core 10 in this embodiment is mounted on the rotating shaft 90 of the drive motor, that is, the first rotor part 12 and the second rotor part 13 rotate with the rotating shaft 90, because one end of the wind guide partition 30 is connected to the first rotor part 12, and the other end of the air guide baffle 30 is connected to the second rotor part 13, so the air guide baffle 30 will rotate with the rotor core 10, and then drive the air flow in the first communication gap 14 to play a suction role. The function of the gas ensures the circulation of the air flow in the gas circulation channel.

In this embodiment, the air guiding partition 30 extends along the radial direction of the rotor core 10 . In this way, it is beneficial to improve the driving of the airflow.

In this embodiment, the rotor core 10 further includes a first rotor end plate 15 and a second rotor end plate 16, the first rotor end plate 15 is arranged at the end of the first rotor part 12 close to the second rotor part 13, The second rotor end plate 16 is arranged on the end of the second rotor portion 13 close to the first rotor portion 12; wherein, one end of the air guiding baffle 30 is connected to the first rotor end plate 15, and the other end of the air guiding baffle 30 It is connected to the second rotor end plate 16 .

When the motor rotates at high speed, the air guide partition 30 will be subjected to a large centrifugal force. In order to prevent the wind guide partition 30 from being thrown out, a protrusion needs to be made on the wind guide partition 30, and the first rotor end plate 15 and the second rotor A groove needs to be made on the corresponding position of the end plate 16, and the protrusion on the air guide partition 30 is inserted into the groove of the corresponding rotor end plate, and then welded to ensure that the motor guides the wind when it is running at high speed. The separator 30 is not thrown out.

In this embodiment, the end surface of the first rotor part 12 close to the second rotor part 13 and the end surface of the first stator part 22 close to the second stator part 23 are located in the same plane, and the second rotor part 13 The end surface of the end close to the first rotor part 12 and the end surface of the second stator part 23 close to the end of the first stator part 22 are located in the same plane. In this way, the airflow in the first communication gap 14 can flow into the second communication gap 24 to the greatest extent.

In this embodiment, the driving motor further includes a wind-shielding ring 40 , and the wind-shielding ring 40 is arranged on the outer periphery of the second communication gap 24 . In this embodiment, by providing the windshield ring 40 , the outer periphery of the second communication gap 24 can be blocked, thereby preventing gas from flowing into the gap between the stator core 20 and the casing 50 of the driving motor.

In this embodiment, the stator core 20 further includes a first stator end plate 25 and a second stator end plate 26, and the first stator end plate 25 is arranged near the second stator portion 23 of the first stator portion 22. end, the second stator end plate 26 is arranged on an end of the second stator portion 23 close to the first stator portion 22; wherein, one end of the windshield ring 40 is connected with the first stator endplate 25, and the windshield ring 40 The other end is connected to the second stator end plate 26 . In this way, the sealing of the second communication gap 24 by the windshield ring 40 can be ensured.

In this embodiment, the drive motor also includes a casing 50 and a front end cover 60 and a rear end cover 70 that block the casing 50, and the rotor core 10 and the stator core 20 are all arranged in the casing 50; the gas circulation channel also Including the first gas containing cavity 81 formed between the casing 50, the front end cover 60, the rotor core 10 and the stator core 20, and the gas chamber 81 formed between the casing 50, the rear end cover 70, the rotor core 10 and the stator core 20 between the second gas containing chamber 82 .

The working principle of the drive motor in this embodiment is as follows: the wind guide partition 30 rotates under the drive of the rotor core 10 to generate air suction, and the gas in the first gas storage chamber 81 and the second gas storage chamber 82 passes through The first ventilation hole 11 flows to the first communication gap 14, passes through the air guide gap 31 between the air guide partitions 30, enters the second communication gap 24, and then passes through the second communication gap 24 and then passes through the second communication gap 24 flows to the first gas containing chamber 81 and the second gas containing chamber 82, thereby realizing the entire gas circulation.

In this embodiment, the air circulation channel is used to form a mode of air cooling circulation, and the air cooling circulation mainly cools the rotor of the motor and the winding at the end of the stator. After the motor starts to work, the rotor starts to rotate, and the rotor partition (air guide partition 30) between the two rotor cores (between the first rotor part 12 and the second rotor part 13) is now equivalent to a fan. , and the speed of the car drive motor is relatively high, the rated speed is generally around 4000rpm, and the peak speed can reach 12000rpm.

Therefore, the rotation of the rotor diaphragm can generate a large negative pressure in the first communication gap 14, through the first ventilation hole 11, the air in the first gas storage chamber 81 and the second gas storage chamber 82 is continuously drawn into The first communication gap 14 flows into the second communication gap 24 through the fan formed by the partition, and then returns to the first gas storage chamber 81 and the second gas storage chamber 82 through the second ventilation hole 21 to form an air circulation loop.

When the circulating air flows through the inner wall surface of each ventilation hole, the inner surface of the casing 50 and the inner surfaces of the front and rear end covers, it exchanges heat with the inner wall of each ventilation hole, the inner wall of the casing, and the inner wall of the end cover respectively. It can be cooled to ensure that there is a steady stream of low-temperature air circulating inside the motor, thereby realizing the cooling of the stator and rotor of the motor.

In this embodiment, both the inner walls of the front end cover 60 and the rear end cover 70 are provided with heat absorbing ribs, and the outer walls of the front end cover 60 and the rear end cover 70 are both provided with cooling ribs.

The inner surfaces of the front and rear end covers of the drive motor in this embodiment are all provided with heat-absorbing ribs, which are used to strengthen the heat exchange between the internal air and the end cover, and transfer the heat of the internal air to the end cover; the front and rear ends of the motor The outer surface of the cover is provided with cooling ribs, which are used to exchange heat between the temperature of the end cover and the outside air, and dissipate the temperature on the end cover.

In this embodiment, the driving motor further includes a casing 50 for accommodating the rotor core 10 and the stator core 20 , and a cooling water passage 51 is provided in the casing wall of the casing 50 . In this embodiment, the cooling effect on the driving motor can be enhanced by providing the cooling water passage 51 .

The water cooling cycle mainly cools the stator core of the motor and the winding of the linear part inside the stator core through heat conduction. The outer surface of the stator core and the inner surface of the casing must be tightly bonded. Before the iron core is transferred into the casing, a layer of heat-conducting silicone grease is applied to the outer surface of the stator core to enhance heat conduction.

After the water is passed through the waterway, the linear part of the winding in the stator core transfers heat to the stator core, and the stator core transfers heat to the casing through the outer surface, and the casing directly exchanges heat with the liquid in the waterway, and the liquid in the waterway and the An external water tank forms a circuit for cooling. Through this cycle process, the winding of the stator part of the motor and the winding of the straight section in the stator core can be realized.

The utility model also provides a vehicle, which includes a driving motor, and the driving motor is the above-mentioned driving motor.

The drive motor in this application is an electric vehicle drive motor with an air-water cooling structure. The design principle is mature, the manufacturing process is simple, and the heat dissipation inside the motor can be well improved.

Different from the stator punching and rotor punching of the conventional electric vehicle drive motor, the drive motor in this embodiment adopts an air-water cooling structure on the stator yoke and rotor yoke of the permanent magnet motor. The air can form a loop. The entire motor in this embodiment has two cooling cycles: a water cooling cycle and an air cooling cycle.

This application changed the cooling structure inside the motor, designed two cooling circuits, and cooled the stator core, stator winding and rotor core of the motor at the same time, which greatly improved the cooling effect, thereby greatly reducing the temperature rise of the motor and improving the performance of the motor. The rated operating point of the motor improves the steady-state operating efficiency of the motor, increases the energy density of the motor, and improves the operational reliability of the motor.

From the above description, it can be seen that the above-mentioned embodiments of the utility model have achieved the following technical effects:

The drive motor in this embodiment is simple in structure and easy to operate, improves the cooling effect on the rotor core 10 and the stator core 20, solves the problem of poor heat dissipation of the motor in the prior art, and greatly reduces the temperature of the motor. The temperature rise of the motor increases the rated operating point of the motor, improves the steady-state operating efficiency of the motor, and ensures the reliable operation of the motor.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. A drive motor, comprising a rotor core (10) and a stator core (20) arranged around the rotor core (10), characterized in that, the drive motor also includes a (10) and the gas circulation channel of the stator core (20) and the gas drive element arranged in the gas circulation channel, the gas drive element drives gas to circulate in the gas circulation channel. 2. The drive motor according to claim 1, characterized in that, the gas circulation passage includes a first ventilation hole (11) opened on the rotor core (10) and a first vent hole (11) opened on the stator core ( 20) on the second ventilation hole (21), the first ventilation hole (11) passes through the first end and the second end of the rotor core (10) along its axial direction, the second ventilation hole The hole (21) passes through the first end and the second end of the stator core (20) along its axial direction. 3. The drive motor according to claim 2, characterized in that, the rotor core (10) comprises a first rotor portion (12) and a second rotor portion (13) arranged at intervals along its axial direction, the The stator core (20) includes a first stator part (22) and a second stator part (23) arranged at intervals along its axial direction, and the gas circulation channel also includes The first communication gap (14) between the second rotor part (13) and the second communication gap (24) between the first stator part (22) and the second stator part (23) ; Wherein, the first communication gap (14) and the second communication gap (24) communicate with each other and communicate with the first ventilation hole (11) and the second ventilation hole (21). 4. The driving motor according to claim 3, characterized in that, the gas driver is arranged in the first communication gap (14) and/or the second communication gap (24), so that the first communication gap (24) Gas in a ventilation hole (11) flows through the first communication gap (14) and the second communication gap (24) and then enters the second ventilation hole (21). 5. The driving motor according to claim 3, characterized in that, a gas driver is arranged in the first communication gap (14), and the gas driver includes a motor connecting the first rotor part (12) and the The plurality of air guide baffles (30) of the second rotor part (13), the plurality of air guide baffles (30) are arranged at intervals along the circumferential direction of the rotor core (10), two adjacent Air guiding gaps (31) are formed between the air guiding partitions (30). 6. The driving motor according to claim 5, characterized in that, the wind guiding partition (30) extends along the radial direction of the rotor core (10). 7. The driving motor according to claim 3, characterized in that, the driving motor further comprises a windshield ring (40), and the windshield ring (40) is arranged on the outer periphery of the second communication gap (24) along. 8. The drive motor according to claim 1, characterized in that, the drive motor further comprises a casing (50) and a front end cover (60) and a rear end cover (70) for blocking the casing (50) , the rotor core (10) and the stator core (20) are both arranged in the casing (50); the gas circulation channel also includes a The cover (60), the first gas containing cavity (81) between the rotor core (10) and the stator core (20), and the casing (50), the rear end cover (70), a second gas containing chamber (82) between the rotor core (10) and the stator core (20). 9. The driving motor according to claim 1, characterized in that, the driving motor further comprises a housing (50) for accommodating the rotor core (10) and the stator core (20), the housing A cooling water passage (51) is arranged in the shell wall of the shell (50). 10. A vehicle, comprising a drive motor, characterized in that the drive motor is the drive motor according to any one of claims 1-9.