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A disc-type hub drive motor

A hub-driven, disc-type technology, applied in the field of electric motors, can solve the problems of low heat dissipation efficiency, small contact area between copper tubes and windings, limiting motor output power, etc., and achieve the effect of improving heat dissipation efficiency, reasonable structure design, and improving output power.

Active Publication Date: 2022-03-29
合肥骐骥电驱动技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the contact area between the copper tube and the winding in this cooling method is small, and the heat dissipation efficiency is low, which seriously limits the output power of the motor
According to literature reports, the power density of axial flux segmented core yokeless motors using this cooling method is generally less than 4kW / kg

Method used

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  • A disc-type hub drive motor
  • A disc-type hub drive motor
  • A disc-type hub drive motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The traditional disc hub motor has a motor weight of 26kg, a peak power of 55kW, an external dimension of Φ240mm×140mm, a peak torque of 120Nm, and a motor power density of 2.12kW / kg.

[0034] The other structures of the disc hub motor in this embodiment are consistent with the existing disc hub motor, only the cooling system is improved, the motor weighs 22kg, the peak power is 135kW, the peak torque is 300Nm, and the power density of the motor is 6.1kW / kg.

[0035] see figure 1 , a disc hub drive motor includes a stator assembly 1 and a rotor assembly 2; the stator assembly 1 includes an annular stator holder, a number of stator units, a fixed shaft 17 and a shaft-shaped flange 16; see image 3 , each stator unit includes a stator core 11 , a stator coil winding 12 and a fixed clip 13 . see Figure 4 , the rotor assembly 2 includes a front flange 21 , a yoke 22 , a permanent magnet 23 , a housing 24 and a rear flange 25 . When in use, the stator assembly 1 is fixe...

Embodiment 2

[0044] The other structure of the disc hub motor in this embodiment is consistent with the traditional disc hub motor, only the cooling system is improved, the structure is the same as that of Example 1, but the size is different; the weight is 15kg, the peak power is 92kW, and the power density of the motor is 6.1kW / kg .

[0045] A traditional disc hub motor without an improved structure and with the same structure in other parts has a motor weight of 17kg, a peak power of 48kW, and a motor power density of 2.8kW / kg.

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Abstract

The invention relates to a disc-type hub drive motor. It includes a stator assembly and a rotor assembly; the stator assembly includes an annular stator fixing frame, several stator units, a fixed shaft and a shaft-shaped flange, and the rotor assembly includes a front flange, a yoke, and a permanent magnet; the improvement lies in: the fixed stator The frame includes an annular outer fixing frame and an annular inner water jacket, and the outer fixing frame is sleeved on the outer circumference of the inner water jacket; the outer fixing frame includes a fixing ring and several fins, and several fins are radially arranged on the On the outer circumference of the fixed ring, a U-shaped water channel is opened in each fin; the plurality of stator units are correspondingly and fixedly arranged between two adjacent fins. When working, the cooling liquid in the U-shaped water channel in each fin circulates and takes away the heat generated on the stator unit. The invention directly contacts the cooling water circuit of the motor with the winding of the motor, effectively increases the heat dissipation area of ​​the motor winding, reduces the heat conduction resistance of the motor heat circuit, and effectively improves the heat dissipation power of the motor, and its power density is greater than 6kW / kg.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a hub drive motor for new energy vehicles. Background technique [0002] Axial flux segmented iron core yokeless motor is a kind of disc motor. Due to its unique topological structure, it has the advantages of high power density and high efficiency. It is very suitable for the application of hub drive, which has strict requirements on the volume and weight of the motor. occasion. However, since there is no yoke in this type of motor, it is difficult to integrate a cooling system. At present, heat dissipation is carried out by integrating copper tubes on the back of the concentrated winding unit, such as Figure 12 shown. However, the contact area between the copper tube and the winding in this cooling method is small, and the heat dissipation efficiency is low, which seriously limits the output power of the motor. According to literature reports, the power density o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K3/24H02K9/197H02K21/24
CPCH02K3/24H02K9/197H02K21/24
Inventor 常九健
Owner 合肥骐骥电驱动技术有限公司
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