Dual-stator rotating motor

Abstract

Disclosed in the invention is a dual-stator rotating motor comprising a rotating shaft, an inner side stator iron core, an outer side station iron core, and a permanent-magnet rotor arranged between the inner side stator iron core and the outer side station iron core. The permanent-magnet rotor is formed by permanent-magnet magnetic steels and non-magnetic-conductive parts. An inner side magnetic-field modulation ring is arranged between the permanent-magnet rotor and the inner side stator iron core; an outer side magnetic-field modulation ring is arranged between the permanent-magnet rotor and the outer side station iron core; and the inner side magnetic-field modulation ring and the outer side magnetic-field modulation ring are formed by magnetic-conductive parts and non-magnetic-conductive parts. The inner side magnetic-field modulation ring, the permanent-magnet rotor, and the outer side magnetic-field modulation ring can rotate relatively. According to the invention, a problem of difficult adjustment of the magnetic field of the traditional permanent-magnet motor can be solved by adjusting relative positions of the inner side magnetic-field modulation ring, the outer side magnetic-field modulation ring, and the permanent-magnet rotor. Requirements of low speed and large torque can be met; the running range of the high rotation speed of the motor is enlarged; and the power output characteristic of the full-speed range is enhanced.

Description

technical field [0001] The invention relates to the technical field of rotating electrical machines, in particular to a double-stator rotating electrical machine. Background technique [0002] With the development of motor technology and permanent magnet materials, rotating permanent magnet motors have been widely used in electric vehicle drive systems due to their advantages of high efficiency, high power density, and high power factor. The driving motor of new energy vehicles generally needs to run at variable speeds. At low speeds, it needs low-speed high-torque output; at high speeds, it needs to maintain constant power. Low-speed high-torque can meet the start-up of the whole vehicle, such as acceleration and climbing. The high-speed constant power can meet the maximum speed requirement of the whole vehicle, as well as overtaking at high speed. [0003] However, traditional permanent magnet motors (surface-mounted rotors or built-in rotors) mostly have a single-stator...

AI Technical Summary

Problems solved by technology

However, on the one hand, the field weakening is still not enough to support the large speed range required by electric vehicles, and the existence of the direct axis component of the stator current greatly increases the copper loss of the stator winding, reducing the efficiency of the permanent magnet motor; In the process of magnetic speed expansion, it is inevitable that the permanent magnet steel will be more or less demagnetized, which reduces the reliability of the permanent magnet motor

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