Air conditioner inverter topology for electric rail locomotive and control method
A technology of power rails and inverters, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve problems such as input voltage fluctuations, air-conditioning efficiency drops, etc., and achieve the effect of alleviating power shortages
Pending Publication Date: 2022-06-03
YANGLING VOCATIONAL & TECHN COLLEGE
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[0003] The purpose of the present invention is to provide a topology and control method of an air-conditioning inverter for electric rail locomotives, which solves the problem of air-conditioning efficiency reduction caused by input voltage fluctuations of air-conditioning inverters used in DC400V-DC600V passenger trains
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[0029] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0030] The topology of the air-conditioning inverter for electric rail locomotives of the present invention, such as figure 1 As shown, it includes DC400-600V input power supply 1, which is used for input power supply DC400V-DC600V, DC400-600V input power supply 1 transmits power to parallel half-bridge inverter group 2, and parallel half-bridge inverter group 2 has four sets of half bridges The inverter circuits are formed in parallel, for example, one of the half-bridge inverter circuits includes a C1 capacitor, a C2 capacitor, an S1 power switch tube, and an S2 power switch tube. Among them, the C1 capacitor and the C2 capacitor form the left bridge arm, and the S1 power switch tube and the S2 power switch tube form the right bridge arm. The parallel half-bridge inverter group 2 is connected with the parallel isolation transformer group 3,...
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The invention discloses an air-conditioning inverter topology for an electric power rail locomotive vehicle, which comprises a DC400-600V input power supply, the DC400-600V input power supply is connected with a parallel half-bridge inverter group, the parallel half-bridge inverter group comprises four half-bridge inverter circuits which are connected in parallel, each half-bridge inverter circuit is connected with an isolation transformer, and the isolation transformer is connected with the DC 400-600V input power supply. Each isolation transformer is connected with an uncontrolled rectification circuit, the four uncontrolled rectification circuits are connected in series to form a series uncontrolled rectification group, and the output positive electrode of the series uncontrolled rectification group is sequentially connected with one end of an inductor L1, one end of a capacitor C9 and the output negative electrode of the series uncontrolled rectification group. A three-phase full-bridge inverter circuit is connected in parallel between one end of the C9 capacitor and the other end of the C9 capacitor, and a single-phase full-bridge inverter circuit is also connected in parallel between one end of the C9 capacitor and the other end of the C9 capacitor. The invention further relates to a control method of the air conditioner inverter topology for the electric power rail locomotive vehicle. The problem that the air-conditioning efficiency is reduced due to fluctuation of the input voltage of an existing DC400V-DC600V air-conditioning inverter for the passenger train is solved.
Description
technical field [0001] The invention belongs to the technical field of power electronics, and relates to a topology and a control method of an air conditioner inverter for an electric rail locomotive vehicle. Background technique [0002] Electric rail locomotives have great fluidity during operation. The locomotives have large vibration, high temperature, severe electromagnetic interference, frequent opening and closing of doors, and poor power supply quality. The input power supply is DC600V, but when the voltage range of the DC input power supply is large (wide voltage input), the use of the inverter is often limited and cannot meet the requirements. The use of three-phase air conditioners and inverter power supply is the most common air conditioning system, but the failure rate of the system has been high, reaching more than 50%, due to problems such as large input voltage fluctuations during use. The main problems are concentrated in On the inverter power supply, it ac...
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IPC IPC(8): H02M3/335H02M7/5387H02M1/088
CPCH02M3/3353H02M7/53871H02M1/088Y02T30/00
Inventor 李培东张争刚何国荣龙建明
Owner YANGLING VOCATIONAL & TECHN COLLEGE
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