Axial flux in-wheel motor with enhanced heat dissipation of windings

A technology of axial magnetic flux and hub motors, applied in the direction of electromechanical devices, electrical components, electric components, etc., can solve the problems of increasing the equivalent axial air gap of the motor, poor heat dissipation of the winding, and limiting the torque density of the motor, etc., to achieve Avoid the axial equivalent air gap length, high maturity of assembly technology, and avoid the effect of quality

Active Publication Date: 2019-02-01
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of poor heat dissipation of the axial motor windings in the prior art. The existing winding cooling system increases the equivalent air gap in the axial direction of the motor and limits the torque density of the motor. Flux hub motor

Method used

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  • Axial flux in-wheel motor with enhanced heat dissipation of windings
  • Axial flux in-wheel motor with enhanced heat dissipation of windings
  • Axial flux in-wheel motor with enhanced heat dissipation of windings

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] The axial flux motor with winding enhanced heat dissipation of the present invention includes a casing 1, a rotor 2, a stator 3, a superconducting flat heat pipe 4, a stator bracket 5 and a rotating shaft 6, as shown in FIG. 1a. In the axial direction, the motor adopts the sandwich structure of the rotor on both sides of the middle stator, and the motor assembly process follows the mature axial motor process. In the axial direction, the stator 3 is sandwiched between the two rotors 2 . The explosion diagram of casing 1, rotor 2, stator 3, superconducting flat heat pipe 4 and stator bracket 5 is shown in Figure 1b shown. The casing 1 is composed of two end covers 101 and a casing 102 , and the rotor 2 is composed of an annular magnetically conductive core 201 and a magnetic steel 202 . The rotor 2 is fixed on the casing 1, the casing 1...

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Abstract

The invention provides an axial magnetic flux hub motor for enhanced heat emission of windings. The motor adopts a sandwich structure with a stator in the middle and rotors on the two sides in the axial direction. The stator of the motor consists of Q stator tooth units, and Q represents the number of slots of the motor and is the time of positive integer of the number m of phases of the motor. Each stator tooth unit comprises a stator tooth iron core and a coil wound around the stator tooth iron core, and a super-conduction flat heat pipe is arranged between the two adjacent stator tooth units. One end of each super-conduction flat heat pipe is in close contact with windings of the two stator tooth units for clamping each super-conduction flat heat pipes therebetween, and the other end of each super-conduction flat heat pipe is inserted into a cooling runner of a stator support. The heat of the windings is quickly transmitted to the cooling runner of the stator support by the super-conduction flat heat pipes by utilizing the features of enhanced heat transmission and enhanced heat exchange of the super-conduction flat heat pipes, thereby realizing enhanced heat emission of the windings and enhancing the torque density of the hub motor.

Description

technical field [0001] The present invention relates to an axial flux hub motor. Background technique [0002] Most of the current electric vehicles adopt a centralized drive mode. The power transmission generally needs to be transmitted to the drive wheels through mechanical devices such as gearboxes, differentials, drive shafts, and universal joints. The transmission chain is long and the efficiency is low. As a power system with distributed drive characteristics, the in-wheel motor is directly installed in the driving wheel, which has outstanding advantages such as short transmission chain, high transmission efficiency, and compact structure, and has received extensive attention and research from domestic and foreign scientific research institutions and mainstream car manufacturers. [0003] However, due to the limited space in the hub and the demand for the torque and weight of the hub motor in the vehicle, the size of the hub motor is required to be compact and the torq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K55/04H02K9/22
CPCH02K9/22H02K55/04
Inventor 李琦范涛王佐梁温旭辉
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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