Hybrid excitation generator control circuit

Abstract

The invention provides a hybrid excitation generator control circuit, and relates to the field of motor control. The hybrid excitation generator control circuit comprises a three-phase full-bridge rectifier circuit, a sampling circuit, a comparison switching circuit and a bride-type four-quadrant power amplifying circuit, wherein a three-phase AC output by a hybrid excitation generator is rectified into a DC busbar current through the three-phase full-bridge rectifier circuit to output to the sampling circuit; the DC busbar current is sampled by the sampling circuit, generates a pulse level through the comparison switching circuit, and forms a pulse excitation current through the bride-type four-quadrant power amplifying circuit; the pulse excitation current is added to an exciting winding of the hybrid excitation generator; the bride-type four-quadrant power amplifying circuit can generate a bidirectional excitation current; when a DC busbar voltage is greater than a given value, demagnetization is carried out; when the DC busbar voltage is smaller than the given value, the magnetism is increased; and the DC busbar voltage is finally stabilized as the given value.

Description

technical field [0001] The invention relates to the field of generator control, in particular to a hybrid excitation generator control circuit. Background technique [0002] The generation of excitation pulse signal in the existing hybrid excitation generator control circuit is mainly based on digital control. On the one hand, the digital control system needs to go through the process of AD sampling (including analog-to-digital signal conversion, sampling, and holding), digital PI adjustment, and excitation pulse signal generation to complete an adjustment. Each process has a time delay, which limits the digital control system. The response speed of the system. On the other hand, the circuit structure of the digital control system is complex, the system reliability is low, and the circuit cost is high. [0003] At the same time, the voltage feedback loop in the existing hybrid excitation generator control circuit is mainly based on the traditional PI regulation, although i...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, provide a hybrid excitation generator control circuit, utilize the advantages of adjustable excitation current to realize the flexible adjustment of the air gap magnetic field, overcome the difficulty of adjusting the magnetic field of permanent magnet motors and the efficiency of pure electric excitation motors Low problem, which is of great significance for widening the operating range of speed-regulating motors, improving generator voltage regulation performance and fault protection capabilities

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