A high-power and high-reliability six-phase permanent magnet fault-tolerant hub motor for electric armored vehicles

Abstract

The invention discloses a high-power high-reliability six-phase permanent magnet fault-tolerant hub motor used for an electric armored vehicle. The high-power high-reliability six-phase permanent magnet fault-tolerant hub motor comprises a stator assembly, a rotor assembly, a rotary shaft, a bearing, a machine shell, front back end covers, and a position sensor; the six-phase windings in the stator assembly adopt a fractional-slot and concentrated single-layer winding structure embedded with partition teeth, so that an electrical fault-tolerant structure can be formed between the phase windings; meanwhile, by combination of the dimensional design of the stator toothed groove structure, the phase winding inductance of the electric motor is increased, the short circuit current is suppressedeffectively, and reliability and fault-tolerant performance of the hub motor are improved; the rotor assembly adopts an internal permanent magnet rotor structure, and the outer side of the rotor is wound with a carbon fiber protection sleeve, so that the mechanical structural strength of the rotor is improved; the stator winding adopts a monocrystal copper wire or silver wire, so that stator lossof the hub motor is lowered; the permanent magnet of the rotor assembly adopts eccentric design, and is subjected to circumferential or axial sectioning processing, so that the rotor loss of the hub motor is lowered effectively; a Z-shaped or spiral heat dissipation water path is formed in the machine shell, so that the heat dissipation capability of the hub motor is improved; and the hub motor has high fault isolation, anti-short-circuit and weak magnetic diffusion capability, so that the requirements of high reliability, high power and high rotary speed of the hub driving of the electric armored vehicle can be satisfied.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motors, in particular to a high-power, high-reliability six-phase permanent magnet fault-tolerant hub motor for electric armored vehicles. Background technique [0002] With the continuous leadership and promotion of multi-electric / all-electric technology, electric drive systems are increasingly used in the field of electric armored vehicle transmission systems, replacing traditional mechanical transmission systems based on clutches, transmissions, reducers, drive shafts, etc. The complexity of the chassis structure of the armored vehicle is greatly simplified, and the utilization rate of the space of the vehicle body, the energy utilization rate of the system and the transmission efficiency are improved. Therefore, the electric drive system has become an important development direction of the drive system of modern electric armored vehicles. [0003] As the core key componen...

AI Technical Summary

Problems solved by technology

With the development of modern armored vehicle electric drive systems in the direction of high reliability, light weight, high power, and miniaturization, it is difficult for traditional permanent magnet synchronous hub motors to effectively meet the performance requirements of the new generation of electric drive systems

[0004] In order to improve the reliability of the electric drive system, traditional in-wheel motors generally adopt the structural form of redundant motors, and there are serious electrical, magnetic, and thermal coupling problems between redundant windings, which lead to mutual interference between redundant systems and fault isolation Poor capacity; In addition, the hub motor rotates at a high speed after the magnetic field is weakened and the speed is expanded, and the rotor eddy current loss and hysteresis loss increase significantly, resulting in a sharp rise in rotor temperature, resulting in demagnetization of the permanent magnet, which seriously affects the working performance of the hub motor

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