A High Torque Density Brushless Dual Electromechanical Port Permanent Magnet Motor and Its Application

Abstract

The invention discloses a brushless double electromechanical port permanent magnet motor with high torque density, which comprises an annular stator core (1), a modulation rotor and a permanent magnet rotor, and is characterized in that the inner surface of the stator core (1) is provided with closed slots, the slots are internally provided with two sets of windings with the numbers of pole-pairs being unequal, one set of the windings are modulation windings (2), and the other set of the windings are permanent magnet windings (3); the modulation rotor comprises modulation rotor yokes (4), and the modulation rotor yokes (4) form a magnetic field modulation motor structure together with the modulation windings (2) and the permanent magnet rotor; the adjacent modulation rotor yokes (4) are provided with a modulation rotor permanent magnet (5) therebetween, each modulation rotor permanent magnet (5) is of a tangential excitation structure, and the modulation rotor permanent magnets (5) form a permanent magnet motor structure together with the permanent magnet windings (3). The invention further discloses a hybrid power automobile comprising the motor. The motor disclosed by the invention can realize independent control for the rotating speed and the torque of two mechanical ports, realizes blushless windings, is compact in structure and has large output torque.

Description

technical field [0001] The invention belongs to the field of permanent magnet motors, and more specifically relates to a brushless dual electromechanical port permanent magnet motor with high torque density and its application. Background technique [0002] Hybrid vehicles use mechanical and electromagnetic devices to completely decouple the speed and output torque of the engine from the speed and torque of the wheels, so that the engine can always work in the high-efficiency zone, thereby improving the driving efficiency of the vehicle. Although the planetary gear structure of traditional hybrid vehicles can realize this function more conveniently, the mechanical gear structure also brings inherent problems such as friction loss, vibration and noise, and frequent maintenance. At the same time, this structure requires a planetary gear and two motors. , multiple clutches and other equipment, the volume is relatively large. In order to solve the problem of the planetary gear ...

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Problems solved by technology

[0005] However, the permanent magnet motor with dual mechanical ports and dual electrical ports also has the following disadvantages: firstly, the structure proposed in this patent document has two stators and two rotors with three layers of air gaps between them, so it requires high manufacturing process At the same time, the manufacturing process is more complicated and the production cost is higher; secondly, the excitation magnetic field generated by the permanent magnet in this topology needs to pass through the three-layer air gap, and the reluctance of the magnetic circuit is relatively large, resulting in a weak magnetic field and weakening the torque output of the motor ability

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