A kind of EMU power supply and its control method

A technology for EMUs and power supplies, which is applied to electrical components, output power conversion devices, and AC power input to DC power output. It can solve the problems of large filter volume, large harmonic content, and poor waveform quality. The effect of simple circuit structure, good waveform quality and simple control

Active Publication Date: 2022-04-01
QINHUANGDAO PENGYUAN OPTOELECTRONICS TECH
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  • Abstract
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Problems solved by technology

However, the above-mentioned boost inverters are all two-level output, the waveform quality is poor, the harmonic content is large, the required filter volume is large, and the required cost is increased

Method used

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  • A kind of EMU power supply and its control method
  • A kind of EMU power supply and its control method

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Embodiment Construction

[0030] 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.

[0031] The purpose of the present invention is to provide a power supply for EMUs and its control method, which can realize single-stage boost inverter and multi-level output, and its input and output potential difference does not change at high frequency, and has high efficiency, small common-mode interference, The filter has the characteristics of small size and low cost.

[0032] In order to make the above objects, features and advantages of the present inv...

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Abstract

The invention discloses a power supply for an EMU and a control method thereof. The power supply includes a DC power supply V dc , capacitance C 1 , capacitance C 2 , capacitance C 3 , capacitance C 4 , switch tube S 1 , switch tube S 2 , switch tube S 3 , switch tube S 4 , switch tube S 5 , diode d 1 , diode d 2 , filter LC and load resistance R; the control method is to ensure that only two switch tubes are turned on at the same time, and at the same time ensure the realization of the inverter process, multi-level output and voltage gain. The EMU power supply and its control method provided by the present invention have low common-mode electromagnetic interference, multi-level output and high-gain step-up and inversion capabilities, have small harmonic content, do not need an additional step-up circuit, are small in size, and low in cost , high efficiency characteristics.

Description

technical field [0001] The invention relates to the technical field of power supply, in particular to a power supply for an EMU and a control method thereof. Background technique [0002] The traditional EMU power supply uses a step-down inverter power supply, such as a single-phase full-bridge inverter. When it is applied to a high-speed rail, since the high-speed rail charger provides a rated voltage of 110V, it is usually necessary to install a boost converter before inverting it to 220V. booster, resulting in a complex two-stage structure and reduced efficiency. In addition, the potential difference between the input and output of the traditional EMU power supply changes at high frequency, and the common-mode interference is large. Additional common-mode filters need to be installed, otherwise the normal use of electrical equipment will be affected, and in severe cases, the safety of train operation will be endangered. In response to the above problems, in 2017, Associa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/483H02M7/5387H02M1/12
CPCH02M7/483H02M7/5387H02M1/126
Inventor 朱立秋郭小强温月华张寅王玲戴丽刘辉武海强陈龙
Owner QINHUANGDAO PENGYUAN OPTOELECTRONICS TECH
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