Double excitation-winding compound-excitation double-salient brushless direct-current generator

Abstract

The invention, which belongs to brushless generator field, discloses a double excitation-winding compound-excitation double-salient brushless direct-current generator. The double excitation-winding compound-excitation double-salient brushless direct-current generator comprises: a double excitation-winding compound-excitation double-salient motor, a rectification circuit and a filtering capacitor. An armature winding of the double excitation-winding compound-excitation double-salient motor, the rectification circuit, a first set of excitation winding of the double excitation-winding compound-excitation double-salient motor and the filtering capacitor are successively connected in series. A second set of the excitation winding of the double excitation-winding compound-excitation double-salient motor is connected with a direct current excitation power supply. Because of a self-excitation effect of the first set of the excitation winding, a generator voltage regulation rate is low and excitation power needed by control output is low. The generator is especially suitable for independent power supply systems, such as an electric automobile vehicle power generation system, an airplane power generation system and the like.

Description

technical field The invention relates to a compound excitation double salient pole brushless direct current generator with double excitation windings, and belongs to the field of brushless direct current motors. Background technique The doubly salient pole motor is a new double salient variable reluctance motor developed on the basis of the switched reluctance motor. In the early 1990s, Professor T.A.Lipo of the United States invented the permanent magnet double salient pole motor. The stator and rotor of the permanent magnet double salient pole motor are both salient pole structures, which are made of silicon steel sheets. The structure is simple, there is no winding on the rotor, and the reliability is high. High advantages, but the air gap magnetic field is difficult to adjust, so voltage regulation or constant power field weakening control is difficult. The electrically excited doubly salient motor replaces the permanent magnet with the excitation winding, so that the...

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Problems solved by technology

The excitation winding of the electrically excited double-salient pole brushless DC generator must be provided by a separate DC power supply, and its excitation power is completely provided by an external power supply. Therefore, in medium and high-power applications, the required excitation power is large, and The excitation controller required to control the excitation current has a large capacity, and the design requirements of its power devices are greatly improved, which makes the excitation controller expensive and less reliable

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