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Axial magnetic field hub motor assembly

A technology of in-wheel motor and axial magnetic field, which is applied to synchronous motors, magnetic circuits, and electromechanical devices with static armatures and rotating magnets, etc. Problems such as large thickness, to achieve the effect of reducing mass and size, and improving torque density

Pending Publication Date: 2020-06-02
清华大学苏州汽车研究院(吴江)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an axial magnetic field wheel hub motor assembly, which solves the problems of excessive radial and axial thickness of the conventional outer rotor permanent magnet synchronous motor and unreasonable structural arrangement when obtaining a large torque

Method used

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  • Axial magnetic field hub motor assembly

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Embodiment Construction

[0017] Preferred embodiment of the present invention:

[0018] An axial magnetic field hub motor assembly includes a central shaft 1, a motor housing 2, a motor end cover 3, a stator assembly, a rotor assembly, and a planetary gear reducer. A first stator assembly 4 and a second stator assembly 5 are fitted on the central shaft, and a planetary gear assembly and a rotor assembly are also arranged between the two stator assemblies. The stator assembly, the rotor assembly, and the planetary gear reducer are all integrated in the motor housing 2 , the central shaft 1 runs through the overall structure, and the motor housing 2 cooperates with the motor end cover 3 .

[0019] The first stator assembly 4 comprises a wound stator core fixed to a stator back plate 6 . The stator back plate 6 is fixed on the motor housing 2 , and the stator back plate 6 and the motor housing 2 are positioned through a seam.

[0020] The planetary gear reducer includes a planet carrier 7, and the plan...

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Abstract

The invention discloses an axial magnetic field hub motor assembly, which comprises a central shaft, a rotor assembly and a stator assembly, wherein the central shaft is arranged in a rotor frame through a bearing in a penetrating mode, and permanent magnets are installed on the rotor frame; a second stator assembly is fixedly arranged on the central shaft in a sleeving manner; a planet carrier isarranged on the central shaft in a sleeving manner; the planet carrier and the second stator assembly are located on the two sides of the rotor assembly respectively; the planet carrier and the hub bearing are integrally arranged; a planet gear is arranged on the planet carrier; a sun gear sleeves the central shaft through a bearing and is fixedly connected with the rotor frame; the central shaftpenetrates through the hub bearing and is locked with the hub bearing; the central shaft is also sleeved with a first stator assembly and a stator back plate; the first stator assembly is fixedly connected with the stator back plate; and the stator back plate sleeves a gear ring and is connected with the gear ring through a spline; the rotor assembly is connected with a speed position sensor; anda hub bearing bolt is arranged on the hub bearing. Under the condition of outputting the same torque, the mass and the size of the motor assembly are reduced, and the torque density of the motor is improved.

Description

technical field [0001] The invention relates to the structural field of an axial magnetic flux motor, in particular to an axial magnetic flux hub motor assembly. Background technique [0002] The current pure electric vehicles basically use a centralized drive power system, that is, motors, gearboxes, transmission shafts, etc., which require a complete set of transmission mechanisms. The hub motor is a distributed drive structure. The motor is directly designed and installed inside the rim to directly drive the wheel. The structure is simple and reliable, and the traditional transmission system can be omitted. [0003] The currently developed in-wheel motors are all permanent magnet synchronous motors, which have the advantages of simple torque control and wide speed range. However, the internal space of the hub is limited, and a braking system needs to be installed. If the in-wheel motor adopts the direct drive method, the torque density of the in-wheel motor in the outer...

Claims

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Application Information

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IPC IPC(8): H02K16/04H02K1/27H02K1/30H02K1/18H02K7/116H02K5/22H02K21/24F16H1/32
CPCF16H1/32F16H2001/327H02K1/18H02K1/2793H02K1/30H02K5/225H02K7/116H02K16/04H02K21/24
Inventor 陈龙生赵峰
Owner 清华大学苏州汽车研究院(吴江)
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