A high-speed hybrid excitation synchronous motor with rotor magnetic circuit decoupling

Abstract

The invention discloses a rotor magnetic circuit decoupling type high-speed hybrid excitation synchronous motor. The rotor magnetic circuit decoupling type high-speed hybrid excitation synchronous motor comprises a machine shell, a stator, a permanent magnet rotor, an electric excitation rotor, an excitation winding, a magnetic conduction bridge fixed on an end cover and a rotating shaft, whereinthe permanent magnet rotor is composed of magnetic steel, a rotor iron core and a high-strength sheath; a surface-mounted structure is adopted, and the structural strength of the permanent magnet rotor can be effectively improved through the high-strength sheath; and the electric excitation rotor is composed of a rotor N pole, an S pole iron core and a high-strength support, and the structural strength of the electric excitation rotor can be effectively improved by the high-strength support. The lengths of two sections of main air gaps formed between the side of the permanent magnet rotor andthe stator core and between the side of the electric excitation rotor and the stator core are different, so that low permanent magnet eddy current loss and the high electric excitation efficiency canbe realized simultaneously. The rotor permanent magnet magnetic circuit of the hybrid excitation synchronous motor is decoupled from an electric excitation magnetic circuit, the air gap magnetic fieldadjustment range is wide, the eddy current loss of the rotor magnetic steel is low, the electric excitation efficiency is high, the structural strength of the permanent magnet and electric excitationcombined rotor is high, and the motor is suitable for high-speed occasions needing magnetism regulation operation.

Description

technical field [0001] The invention relates to the field of synchronous motors, in particular to a rotor magnetic circuit decoupling high-speed hybrid excitation synchronous motor. Background technique [0002] The excitation source of the hybrid excitation motor is provided by the permanent magnet and the excitation winding. The permanent magnet excitation can effectively improve the torque / power density and operating efficiency of the motor. Torque / power density, high efficiency and wide-ranging operation capability have broad application prospects in wind power generation, aircraft and vehicle power supplies and other independent power generation fields and drive fields. According to the interaction relationship between the permanent magnet magnetic potential and the electric excitation magnetic potential, the hybrid excitation motor can be divided into three structures: magnetic potential series, parallel and parallel. [0003] The permanent magnet magnetic potential o...

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a new rotor magnetic circuit decoupling type hybrid excitation synchronous motor structure to overcome the complex structure of the existing series / parallel hybrid excitation motor, electric excitation and The magnetic circuit coupling of the permanent magnet rotor is serious, and the existing parallel hybrid excitation motor has a large invalid axial length, a large weight of the whole machine, is not suitable for high-speed operation, and the stator core loss will be increased during the field weakening process

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