A DC Power Supply Circuit Based on Choke Transformer
A technology of choke transformer and DC power supply, which is applied in the fields of power electronics and railway electrics. It can solve the problems that low-voltage power supply is not easy to obtain, and achieve the effect of improving the overall reliability and information level, simple structure and high efficiency.
Active Publication Date: 2017-10-17
EAST CHINA JIAOTONG UNIVERSITY
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Problems solved by technology
[0006] The purpose of the present invention is to solve the technical problem that the low-voltage power supply along the electrified railway is not easy to obtain. The present invention proposes a DC power supply circuit based on a choke transformer, and provides a brand-new implementation plan for the technology of taking power without pulling wires.
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Embodiment Construction
[0022] The embodiments of the present invention are further described in conjunction with the accompanying drawings.
[0023] figure 1 It is a schematic diagram of a choke transformer; one of the currents enters a group of coils on the primary side of the choke transformer from point A of the first rail, and then flows through the neutral point N of the primary side of the choke transformer to ground; the other current point C of the second rail Enter another group of coils on the primary side of the choke transformer, and then flow through the neutral point N of the primary side of the choke transformer to ground; the secondary sides 1 and 2 of the choke transformer provide low-voltage power supply to the train.
[0024] figure 2 It is the schematic diagram of the DC power supply circuit based on the choke transformer in this embodiment;
[0025] In the figure, 10 is a power supply unit based on a choke transformer; 20 is a filter circuit unit; 30 is a charger unit; 40 is ...
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A DC power supply circuit based on a choke transformer, comprising a power supply unit (10) based on a choke transformer, a filter circuit (20), a charger unit (30) and a voltage stabilizing output unit (40). The invention uses a choke transformer to obtain electric energy, and finally obtains the desired low-voltage power supply through electrical control means to meet the power supply requirements of various electrical equipment. The solution is flexible and easy to implement, with low cost and less maintenance. The circuit structure of the invention is simple, reliable and practical. The system has high reliability and high efficiency, which solves the problem that the low-voltage power supply is difficult to obtain due to the inconvenience of laying cables along the current electrified railway. It can provide high-quality DC power supply for electrical and electronic equipment, and through the operation of such equipment and further Improve the overall reliability and informatization level of the electrified railway system, and the control and monitoring methods will also be more flexible.
Description
technical field [0001] The invention relates to a DC power supply circuit based on a choke transformer, which belongs to the technical field of railway electric technology and the technical field of power electronics. Background technique [0002] There are high-voltage lines laid along electrified railways, especially along high-speed railways and high-speed trains, with related settings. However, due to the lack of low-voltage power supply, many low-voltage electrical equipment still cannot be connected for application, which greatly limits the automation and informatization of high-speed railways. further improvement and improvement. [0003] In the electrified traction section, in order to ensure that the traction current flows smoothly through the insulating joints, choke transformers are installed at the sending end and receiving end of the track circuit, and the track circuit equipment is connected to the track through the choke transformer and transmits signal inform...
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IPC IPC(8): H02M7/04B60M7/00
CPCH02J5/005H02J7/025
Inventor 刘珺傅军栋马书研
Owner EAST CHINA JIAOTONG UNIVERSITY