Mixed excitation dual protruding pole brushless DC generator

Abstract

The utility model relates to a brushless direct current generator with hybrid excitation double salient, belonging to double salient motor, which comprises a stator and a rotor, wherein, the stator is composed of a stator core (1), a permanent magnet (2), a magnetizing coil (3) and the armature windings (4),(5),(6); the rotor comprises a rotating shaft (6), a rotor core (7); the yoke of the stator is provided with more than two groups of permanent magnets with symmetrical distribution, moreover the number of each group is more than two, and the neighboring permanent magnets are separated by three stator poles; meanwhile the magnetizing coil with symmetrical distribution is arranged outside the permanent magnets. The utility model has no additional air gap; the magnetic potential of the permanent magnet and the magnetic potential of the excitation make parallel connection so as to avoid the permanent magnet being demagnetized by the magnet potential of the electric excitation. A plurality of sets of armature windings output a plurality of channels of direct current after the rectification; wherein the output of the armature winding (4) sleeved on the stators between the permanent magnets can provide the power supply for the own excitation coil (3) of the motor, which makes the entire motor work in an independent electricity generation condition; therefore the utility model is in particular suitable for the wind power generation situation and other separate supply application situation.

Description

technical field [0001] The invention relates to a hybrid excitation doubly salient pole brushless DC generator, which belongs to the technical field of doubly salient pole motors. Background technique [0002] In the early 1990s, American scholar T.A. Lipo and others proposed a new type of brushless motor, a permanent magnet double salient pole motor, for the shortage of switched reluctance motors. With the continuous development of this new type of motor, the magnetic potential source of the motor has changed from permanent magnets to electric excitation, or a combination of the two, and electric excitation doubly salient motors and hybrid excitation doubly salient motors have appeared one after another. The permanent magnet double salient pole motor has high power density, but the air gap magnetic field is difficult to adjust, so voltage regulation or constant power field weakening control is difficult; the magnetic field of the electric excitation double salient pole moto...

AI Technical Summary

Problems solved by technology

This solution actually uses two motors, two sets of stators and two sets of rotors. The structure of the motor is relatively complicated, and the axial length increases. Under the natural cooling or self-contained fan cooling mode, it is not conducive to the ventilation and heat dissipation of the motor.

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