Electro-excited double-salient pole generator with compound excitation of double-excited windings with boosted magnetism

Abstract

The invention relates to a magnetic enhancing boosting double-excitation winding compound doubly salient electric-excitation generator. According to the doubly salient electric-excitation generator, tail ends of three phase windings A, B and C are open circuit windings, each phase winding is respectively connected with a diode and a capacitor, a dotted terminal of each phase winding is respectively connected with an anode of the diode, a cathode of the diode is connected with a positive electrode of the capacitor, the other end of the each phase winding is connected with a negative electrode of the capacitor, for three independent rectifier filter portions, according to the positive and negative relation of the capacitors, sequentially, a negative electrode of an A-phase capacitor Ca is connected with a positive electrode of a B-phase capacitor Cb, and a negative electrode of the B-phase capacitor Cb is connected with a positive electrode of a C-phase capacitor Cc. The doubly salient electric-excitation generator is characterized in that one end of a first excitation winding Lf1 is connected with a positive electrode of the A-phase capacitor Ca, the other end of the first excitation winding Lf1 is used as a positive electrode or a negative electrode of the generator to connect with a load, and two ends of the second excitation winding Lf2 are connected with a direct current excitation voltage source Uf.

Description

Technical field [0001] The invention belongs to the technical field of generators, and in particular relates to a double-excited electric excitation double salient generator with a double excitation winding compound excitation. Background technique [0002] The stator and rotor of the electric excitation double salient pole motor are both salient pole structures, which belong to the variable reluctance motor, and do not require rotor position sensors and power converters, and the system has high reliability. The electric excitation double salient motor replaces the permanent magnet with the excitation winding, so that the excitation magnetic field of the motor can be adjusted. There are no windings and permanent magnets on the rotor, with a very simple structure, reliable operation and low cost; when the generator load changes, the excitation current in the excitation winding can be adjusted to maintain a constant voltage output, which is convenient for control. It is used in avi...

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Problems solved by technology

Affected by factors such as phase winding inductance and full-wave rectifier diode commutation, the output voltage of a doubly salient generator using a full-wave rectifier decreases as the load increases. Common electrical equipment always expects the supply voltage to remain constant, and the generator excitation The regulation system keeps the terminal voltage constant by increasing the excitation current, thus increasing the excitation loss of the excitation system; at the same time, for the electrically excited double salient pole motor, due to the influence of the cogging effect of the salient pole, when operating as a motor, the torque Large pulsation; when working as a generator, there is also the defect of large output DC voltage pulsation, which greatly limits the application of double-salient pole motors in wide-speed operation conditions, especially low-speed operation and high-power applications; The salient pole generator is used in a wide speed operating state, especially in the case where the speed change is relatively large and changes rapidly. When the post-stage load is a power conversion device, the transient peak voltage on the winding structure of the traditional star-delta connection is relatively high. easy to damage insulation

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