Controllable single-phase bridge rectifying generating system with doubly salient electromagnetic motor

Abstract

The invention discloses a controllable single-phase bridge rectifying generating system with a doubly salient electromagnetic motor, belonging to special type generating systems. The generating system is composed of three main parts, namely a doubly salient electromagnetic motor, a single-phase bridge controllable rectifying circuit and a generator controller, wherein the armature windings of the doubly salient electromagnetic motor are not in star connection but are respectively connected with the bridge type controllable rectifying circuit and independently rectified and output; the controller of the generating system can generate a driving signal of a bridge circuit controllable switch device according to the received generator rotor position signal and three-phase armature current signal to control the magnitude of the armature current, thereby realizing power-factor correction of the doubly salient generator by the bridge circuit; and according to the direct-current side voltage signal feedback quantity, the exciting current value can be changed to regulate the magnetic field intensity, thereby realizing excitation voltage regulation of the doubly salient electromagnetic motor, and forming a phase parallel mode and a phase series mode during power supply for a load to adapt to different load requirements.

Description

technical field [0001] The invention relates to a controllable single-phase bridge rectification power generation system of an electric excitation double salient pole motor, belonging to a special power generation system. technical background [0002] The electric excitation double salient pole motor belongs to the variable reluctance motor. Its stator and rotor are salient pole structures, which are made of silicon steel sheets. The structure is simple, there is no winding on the rotor, and the motor has high reliability. Doubly salient pole motors are mostly used in DC power generation systems. The phase windings are star-connected and then rectified to output DC through an external circuit. Traditionally, the rectification method is relatively simple, and its rectification circuit topology is mainly a full-bridge or half-wave rectification circuit composed of diodes. , and when the motor fails, due to the mutual influence between the phase windings, the voltage distortion...

AI Technical Summary

Problems solved by technology

[0003] At the same time, in the traditional uncontrolled rectification circuit, under different load conditions, the phase current and phase voltage of the generator armature produce a phase shift, which reduces the power factor and power density of the generator. At the same time, the diode rectification circuit introduces low-order harmonics into the generator Winding, which aggravates the armature reaction, and the lowest harmonic frequency of the output DC voltage is low, which directly leads to the large size of the DC side filter

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