Wide-speed adjustable direct-axis magnetic field-enhanced permanent magnet brushless motor for vehicles and its zoned magnetic regulation control

Abstract

The direct-axis magnetic field-enhanced permanent magnet brushless motor with wide speed regulation for vehicles and its zoned magnetic regulation control is suitable for the field of electric vehicles with wide speed regulation, low speed, high torque and high efficiency. Its structure is composed of stator, rotor, non-magnetic bushing and rotating shaft. It is characterized in that the stator armature winding adopts distributed winding or modular winding; the rotor is uniformly embedded with permanent magnet steel along the circumferential direction, and adopts alternating distribution magnetization, increasing the number and thickness of the rotor quadrature axis magnetic circuit and the permanent magnet Steel forms a magnetic barrier in a certain relationship. The non-magnetic bushing holds the rotor core together and is closely connected to the shaft, resulting in a new class of direct-axis field-enhanced permanent magnet brushless motors. The feature of the invention is that the direct-axis inductance of this type of motor is greater than the quadrature-axis inductance, and cooperates with the zoned magnetic regulation control, inheriting the advantages of traditional permanent magnet synchronous power density, reliable operation, high efficiency, and high energy density, and further reducing copper consumption and energy density. Iron loss improves the efficiency of the motor and solves the problem that the traditional permanent magnet synchronization is difficult to achieve weak field control.

Description

technical field [0001] The invention relates to a new type of permanent magnet brushless motor, which belongs to the field of motor manufacturing and control, and especially refers to a motor that is suitable for driving performance requirements such as wide speed regulation, high efficiency, and high power density in applications such as hybrid electric vehicles and electric vehicles. Permanent magnet brushless motor. Background technique [0002] As one of the key executive components of hybrid electric vehicles and electric vehicles, the driving performance of the vehicle drive motor directly affects the performance of the whole vehicle of hybrid electric vehicles and electric vehicles. In the field of vehicle drive motors, traditional built-in permanent magnet brushless motors are used, which have the advantages of high efficiency and high power density. Since this type of permanent magnet brushless motor uses permanent magnet steel as a single excitation source, the ai...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the deficiencies in the prior art, the invention develops a direct-axis magnetic field enhanced permanent magnet brushless motor with wide speed regulation and high efficiency, and adopts a combined zone magnetic regulation control strategy to improve the motor performance at low speeds. High operating efficiency, which solves the problem that the traditional built-in permanent magnet synchronous motor is difficult to adjust and has a small speed range

It is especially suitable for the field of hybrid electric vehicles and electric vehicles that require low speed, high torque, high efficiency operation, and wide speed regulation range.

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