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Main and auxiliary generator ultra-wide-frequency excitation device of AC transmission internal combustion locomotive

A technology for diesel locomotives and AC drives, which is applied to control the direction of generators through changes in the magnetic field, which can solve the problems of large sampling errors in voltage and frequency, and achieve the effect of overcoming large sampling errors and ensuring real-time synchronization

Active Publication Date: 2017-10-24
CRRC YONGJI ELECTRIC CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The invention solves the problem that the ultra-broadband excitation control only uses the sampling hardware circuit or software to calculate and sample, and the voltage and frequency sampling errors are large, and provides an ultra-broadband excitation device for the main and auxiliary generators of the AC drive internal combustion locomotive

Method used

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  • Main and auxiliary generator ultra-wide-frequency excitation device of AC transmission internal combustion locomotive
  • Main and auxiliary generator ultra-wide-frequency excitation device of AC transmission internal combustion locomotive
  • Main and auxiliary generator ultra-wide-frequency excitation device of AC transmission internal combustion locomotive

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Embodiment Construction

[0020] The ultra-broadband excitation device for the main and auxiliary generators of the AC drive diesel locomotive includes a three-phase fully-controlled rectifier bridge main circuit and a control circuit composed of thyristors SCR1~SCR6, and the control circuit includes a sampling board, a synchronization board and a control board;

[0021] The sampling board includes a DC output voltage sensor and a DC / AC conversion module. The DC output voltage sensor collects the output voltage of the generator and converts it into AC through the DC / AC conversion module, and sends it to the subsequent synchronization board. The selection of the DC output voltage sensor can effectively avoid the problem of large sampling voltage error caused by the distortion of the generator output waveform voltage, that is, the DC output sampling voltage of the DC output voltage sensor is not affected by the distortion of the generator output waveform voltage. The DC output voltage sensor adopts the WB...

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Abstract

The invention relates to a generator excitation device, and more particularly to a main and auxiliary generator ultra-wide-frequency excitation device of an AC transmission internal combustion locomotive. The main and auxiliary generator ultra-wide-frequency excitation device solves the problems that the ultra-wide-frequency excitation control only adopt a sampling hardware circuit or software for calculating and sampling, and the voltage and frequency sampling errors are big. The main and auxiliary generator ultra-wide-frequency excitation device adopts a method of combining hardware frequency measuring equipment with software calculation to perform synchronous detection in a cooperated manner, overcomes the problem of big sampling errors at high frequency, ensures the real-time synchronism of PMW control and an excitation power supply, realizes precise ultra-wide-frequency excitation control of main and auxiliary generators of the AC transmission internal combustion locomotive under high-frequency output, and is particularly suitable for a traction generating unit of a trunk line internal combustion locomotive.

Description

technical field [0001] The invention relates to a generator excitation device, in particular to an ultra-broadband excitation device for a main and auxiliary generator of an AC drive internal combustion locomotive. Background technique [0002] High-power diesel locomotives are extremely important for the development of railway transportation. With the development and popularization of AC drive technology, AC drive technology has been applied in the transmission system of new diesel locomotives. The key system control technology of diesel locomotives is still in the hands of a few Companies in developed countries, so research on AC drive systems for diesel locomotives is of great significance for improving the level of railway equipment manufacturing. [0003] The energy of the diesel locomotive comes from the diesel engine, and generates electricity through the main and auxiliary generators to drive the traction inverter and the traction motor. Among them, the external cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/36
CPCH02P9/36
Inventor 李国锋李勇斌武彩生霍志新陈建峰
Owner CRRC YONGJI ELECTRIC CO LTD
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