Mixed-excitation synchronous motor with tripolar combination

Abstract

The invention discloses a mixed-excitation synchronous motor with a tripolar combination, and belongs to the technical field of motors. The mixed-excitation synchronous motor comprises a case (1), a stator core (2), armature windings (3), a rotor core (4), a permanent magnetic pole (5), ferromagnetic poles (6), exciting windings (7) and a rotating shaft (8). The armature windings are distributed in stator core grooves, and poles of the armature windings are identical to poles of rotors in number. According to the tripolar combination of the rotor core, the permanent magnetic pole is arranged in the middle, and the ferromagnetic poles are arranged on two sides. The exciting windings are placed in grooves on two sides of the tripolar combination, and the number of poles of each exciting winding is one third of that of the poles of the rotors. During motor operation, the exciting windings can be powered by an excitation system with or without a brush; wide range adjustment of a magnetic field of the motor can be achieved only by excitation capacity which is about one third of excitation capacity of a common synchronous motor. Compared with the prior art, the mixed-excitation synchronous motor has the advantages of simple structure, few permanent magnetic material consumption, high motor efficiency, high magnetic field adjustment capability and capability of adapting to wide range operation speed requirements.

Description

technical field [0001] The invention relates to a hybrid excitation synchronous motor. Background technique [0002] Synchronous motors generally require excitation. The magnetic field of the synchronous motor with electric excitation is easy to adjust, which can not only ensure the voltage stability when operating as a constant speed generator, but also ensure wide range magnetic adjustment and high power factor when operating as a speed regulating motor. The synchronous motor with permanent magnet excitation eliminates the excitation loss of the electric excitation synchronous motor, and has the remarkable advantage of high efficiency. However, the inherent permanent magnet field of the permanent magnet motor is difficult to adjust. There are both permanent magnet and electric excitation in the hybrid excitation synchronous motor, and the two magnetic potential sources exist at the same time. It is possible to combine the advantages of both, and it is possible to retain ...

AI Technical Summary

Problems solved by technology

Therefore, when they are used as constant-speed generators, they can generally meet the requirements of stable voltage operation through excitation regulation; but it is generally difficult to achieve wide-range magnetic regulation through excitation regulation, neither can meet the constant voltage operation of generators with wide-range variable speed requirements, nor can it meet the requirements of constant power and high power factor operation of motors with wide range speed regulation

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