DC feedback type DC electronic load for locomotive power supply test

A DC electronic load and power supply testing technology, which is applied in the direction of power supply testing, electrical program control, sequence/logic controller program control, etc., can solve the problems of grid harmonic pollution, increase loss, reduce efficiency, etc., and achieve control mode Simple, avoids loss and harmonic effects

Inactive Publication Date: 2016-01-13
WUHAN ZHENGYUAN ELECTRIC
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Problems solved by technology

Although this type of load has the effect of saving energy, in the process of power supply testing, the electric energy has to go through multiple conversion links such as inverter grid connection and rectification, which not only reduces efficiency and increases losses, but also brings harmonics to the power grid. Pollution

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  • DC feedback type DC electronic load for locomotive power supply test

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0020] refer to figure 1 , the DC feedback type DC electronic load for locomotive power testing, including a main circuit and a control circuit, the main circuit is composed of a step-up chopper circuit 13 and a phase-shifting full-bridge circuit 19 cascaded.

[0021] The control circuit includes a digital signal processing unit 14 and a logic control unit 16 , and also includes a human-machine interface composed of a host computer 5 and a programmable logic c...

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Abstract

The present invention discloses a DC feedback type DC electronic load for locomotive power supply tests. The DC feedback type DC electronic load comprises a main circuit and a control circuit, wherein the main circuit is cascaded by a boost chopping circuit and a phase-shifted full-bridge circuit; and the control circuit is composed of a digital signal processing unit DSP and a logic control unit CPLD, is connected with an upper computer through a CAN communication circuit, is connected with a contactor control coil and an auxiliary coil through a switching signal processing circuit, is connected with voltage and current sensors through an analog signal processing circuit, controls the on-off of an IGBT in the main circuit through an IGBT driving module, and achieves the required load simulation and energy feedback functions. The DC feedback type DC electronic load allows tested energy to be recycled, saves a series of conversion links such as rectification and inversion when compared with a method of feeding the energy back to an AC power grid, makes the control method simpler, and reduces cost.

Description

【Technical field】 [0001] The invention relates to the technical field of locomotive power supply testing, in particular to a DC feedback type DC electronic load for locomotive power supply testing. 【Background technique】 [0002] There are mainly two types of loads for the existing mature locomotive power supply test: [0003] Energy consumption type: mainly composed of series and parallel connections of high-power resistors, capacitors, and inductors. The connection mode of the locomotive power supply is controlled by the switch circuit to realize various tests before leaving the factory; or the load characteristics of the factory power supply are simulated through the power electronic circuit, and finally The test energy is released through resistance heating. This kind of load consumes all the energy of the test, and generates a lot of heat energy during the energy consumption process, which increases the difficulty of heat dissipation and brings safety hazards. [0004...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/40G05B19/05
Inventor 孙得金席海山李昌泉胡奔柴忠民宋涛徐海防洪捷
Owner WUHAN ZHENGYUAN ELECTRIC
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