Independent wheel traction hub motor for railway vehicle

Abstract

The invention relates to an independent wheel traction hub motor for a railway vehicle. The independent wheel traction hub motor comprises a stator, a rotor, an unequal-width unequal-thickness Halbachaxial annular part segmented permanent magnet array, a rotating shaft and an armature winding, wherein the rotor is installed in the stator, the rotor is fixed on the rotating shaft, the armature winding is installed on the stator, the unequal-width unequal-thickness Halbach axial annular part segmented permanent magnet array is installed on the rotor and located between the rotor and the stator,each magnetic pole is composed of three permanent magnets with the same polarity, and the permanent magnets adopt a Halbach magnetizing mode. The three permanent magnets comprise a main magnetic poleand two boundary magnetic poles, the main magnetic pole is of an axial annular part segmented structure, and the two boundary magnetic poles are located on the two sides of the main magnetic pole andare unequal to the main magnetic pole in width and thickness. The unequal-width unequal-thickness Halbach axial annular part segmented permanent magnet synchronous motor is applied to the interior ofa hub, the harmonic distortion rate of an air gap magnetic field is small, the utilization rate of permanent magnets is high, the torque pulsation is low, and the eddy current loss of the permanent magnets is small.

Description

[0001] The invention relates to the technical field of motors, in particular to an independent wheel traction hub motor for rail vehicles. Background technique [0002] The hub motor drive system is characterized by integrating the hub motor, reducer and brake into the hub of the rail vehicle, which improves the space utilization and flexibility of the rail vehicle. According to the characteristics and driving requirements of the independent wheel traction hub motor for rail vehicles, it has the following advantages: [0003] (1) The hub motor has a high power density; [0004] (2) Hub motors have peak torque output capabilities to meet the needs of rail vehicles for starting, accelerating, and climbing; hub motors have a wider constant power operating speed range, and within the constant power operating range, hub motors have higher s efficiency. [0005] (3) In order to reduce the vibration and noise caused by the torque fluctuation of the hub motor in the rail vehicle, th...

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Problems solved by technology

[0011] Previous studies on the Halbach permanent magnet array of permanent magnet synchronous motors mainly focused on the influence of changing the height, thickness and magnetization angle of the boundary magnetic poles on the air gap flux density harmonic distortion rate and electromagnetic torque fluctuation, without considering the influence of the permanent magnet synchronous motor There are certain limitations in the unified consideration of the electromagnetic performance, especially for the permanent magnet synchronous motor in the narrow hub, the suppression of the eddy current loss of the permanent magnet is very important

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