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Hybrid excitation generator control circuit

A technology of generator control and mixed excitation, which is applied to control the direction of the generator through the change of the magnetic field, can solve the problems of the difficulty in adjusting the magnetic field of the permanent magnet motor and the low efficiency of the pure electric excitation motor, so as to simplify the design of the driving power supply, reduce the cost of the circuit, The effect of improving dynamic performance

Active Publication Date: 2016-05-04
BEIJING PULIMEN ELECTRO MECHANICAL HIGH TECHN CO
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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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Embodiment Construction

[0027] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0028] like figure 1 Shown is the block diagram of the control circuit system. It can be seen from the figure that a hybrid excitation generator control circuit includes a three-phase full-bridge rectifier circuit, a sampling circuit, a comparison switch circuit and a bridge-type four-quadrant power amplifier circuit; an external hybrid excitation synchronous generator The output three-phase alternating current is rectified by a three-phase full-bridge rectifier circuit and output to the sampling circuit; the sampling circuit converts the voltage of the DC bus power into a sampling voltage and outputs it to the comparison switch circuit; the comparison switch circuit presets a given voltage 2.3 -2.7V, and after the difference between the given voltage and the sampling voltage is adjusted by PI, it is subtracted from the triangular carrier voltag...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/30
CPCH02P9/30
Inventor 袁旭超常亚辉雷厚中李建春王晓瑜
Owner BEIJING PULIMEN ELECTRO MECHANICAL HIGH TECHN CO
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