Hybrid excitation fault-tolerant motor system based on brushless harmonic excitation

Abstract

The invention discloses a hybrid excitation fault-tolerant motor system based on brushless harmonic excitation. In the system, a harmonic winding (8) is added; an excitation winding and the harmonic winding are mounted in a rotor slot in a sleeve manner, and both are concentrated windings; excitation winding coils are orderly connected end to end in series, and form an electric excitation magnetic field; the harmonic windings in two rotor slots which are opposite in radial direction are connected in series to form one phase; and the harmonic windings of each phase are connected in parallel and then connected with the excitation windings through a rectifying circuit, and provide power for the excitation windings. For the motor system provided by the invention, on the rotor structure, the excitation windings, the harmonic windings and a rectifier are added, and an electric brush and a slip ring are omitted, thus, further improvement of reliability and power density of the motor is facilitated. Meanwhile, a permanent magnet in the rotor is set in a V form, the permanent magnet has both radial magnetization and tangential magnetization, magnetic flux is concentrated effectively, output power of the motor is improved, and the system has the advantages, such as wide range of speed regulation, high power density and high efficiency.

Description

technical field [0001] The invention relates to a motor, in particular to a hybrid excitation fault-tolerant motor based on brushless harmonic excitation. Background technique [0002] The rotor permanent magnet type built-in permanent magnet synchronous motor has the advantages of large torque output, wide speed range, high power density and high efficiency, and has been widely used in many high-performance drive fields. In the high-performance drive fields such as new energy electric vehicles, wind power generation and aerospace, high requirements are placed on the reliability of the drive system. However, the traditional built-in permanent magnet synchronous motor still has the problem of poor fault tolerance and cannot meet the system reliability requirements. In order to overcome this shortcoming, some experts and scholars at home and abroad have proposed a fault-tolerant motor, which can realize the isolation of the circuit, magnetic circuit and temperature field betw...

AI Technical Summary

Problems solved by technology

[0003] In view of the above existing technologies and their shortcomings, the present invention proposes a hybrid excitation fault-tolerant motor system based on brushless harmonic excitation, which solves the problems of poor fault-tolerant operation performance, permanent magnet demagnetization and excitation adjustment existing in traditional built-in permanent magnet synchronous motors problems, while improving the efficiency and torque density of the motor, and can achieve brushless, to ensure the high reliability of the motor operation

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