Mixed excitation magnetoelectric machine adopting harmonic excitation

Abstract

The invention discloses a mixed excitation magnetoelectric machine adopting harmonic excitation, comprising a machine shell (1), a stator core (2), a stator winding (3), a permanent magnet pole (4), a ferromagnetic pole (5), a rotating shaft (6), a rotor core (7) and a rotor winding (8), wherein, a rotor magnet pole is composed of the permanent magnet pole (4) and the ferromagnetic pole (5) whichis provided with the rotor winding (8); the rotor winding (8) consists of a harmonic winding (14) and an excitation winding (13); the stator winding (3) comprises a main winding (11) and a harmonic excitation winding (12), and is distributed in a stator groove; the pole distance of the main winding and the pole distance of the rotor excitation winding are identical; the pole distance of the harmonic excitation winding and the pole distance of the rotor harmonic winding are identical; the harmonic excitation winding is connected with an excitation controller; when the motor runs, the current in the harmonic excitation winding can be controlled to achieve the functions of adjusting magnetic field and voltage. Compared with the prior art, the invention has no electric brush, collecting electric ring, additional air gap, axial magnetic circuit, has simple structure, little magnetic-flux leakage, less excitation loss, high efficiency of the motor and strong ability of adjusting the main magnetic field.

Description

technical field [0001] The invention relates to a permanent magnet motor, in particular to a hybrid excitation permanent magnet motor adopting harmonic excitation. Background technique [0002] With the continuous improvement of the performance of permanent magnet materials and the continuous decline of prices, the use of permanent magnet materials in motors has become increasingly widespread. The use of permanent magnet materials brings many advantages to the motor: high power density, small size, light weight, high efficiency, brushless, simple structure, high reliability, and flexible structure. The research on permanent magnet motors has been a hot spot in the field of motor research for many years. Therefore, all countries in the world have invested a lot of manpower, material resources and financial resources in the research and development of permanent magnet motors, and many motors with new structures have appeared. However, there are still some difficulties in the ...

AI Technical Summary

Problems solved by technology

The motor magnetic circuit of this solution is similar to the traditional motor, and the structure is simple, but the rotor electric excitation winding and the external still need slip rings and brushes, which cannot be brushless, so that the motor maintenance workload is large

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