Hybrid excitation wound rotor and hybrid excitation wound synchronous motor

Abstract

The invention discloses a hybrid excitation wound rotor and a hybrid excitation wound synchronous motor. The hybrid excitation wound rotor comprises a rotating shaft positioned in the center of the rotor; a rotor core is arranged outside the rotating shaft; a set number of salient poles are arranged on the rotor core; coils are wound on two sides of each salient pole to form a rotor exciting winding; permanent magnets are mounted on the surface of one side, opposite to the rotating direction of the motor rotor, of the geometric center line of each salient pole; and the permanent magnets of thewhole rotor are asymmetrically distributed. According to the hybrid excitation wound rotor, the direct-current excitation torque and the permanent magnet torque can be effectively utilized; the asymmetric design of the permanent magnets not only increases the salient pole ratio of the motor, but also increases the reluctance torque; and the direct-current excitation torque, the permanent magnet torque and the reluctance torque of the motor are superposed at the same or similar current phase angle to improve the electromagnetic torque, so that the torque density, the efficiency, the power factor and other electromagnetic properties of the hybrid excitation wound synchronous motor are improved.

Description

technical field [0001] The invention relates to the technical field of hybrid excitation synchronous motors, in particular to a hybrid excitation wound rotor and a hybrid excitation wound synchronous motor. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] In recent years, permanent magnet synchronous motors have attracted much attention due to their high torque density and high efficiency. However, due to the high price of rare earth permanent magnet materials, it is imperative to develop high-performance motors with less or no rare earth permanent magnets. Wound rotor synchronous motors do not rely on permanent magnet materials, and are low in cost and strong in stability, but relatively low in performance. Many researchers have proposed a large number of technologies to improve the performance of wound rotor synchronous motors, but the ...

AI Technical Summary

Problems solved by technology

The design of the traditional hybrid excitation wound synchronous motor is based on the rotor structure of symmetrical permanent magnets and field windings, which also makes the motor unable to make full use of the torque components

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