The Design Of Power Supply For Air-Conditioning Of Electric Locomotive

In accordance with market research, the paper mainly designs a new type of power supply system for electric locomotive air-conditioning. Research purpose of the study is designed to meet the needs of the market , a more integrated, intelligent, small and high power factor and so on. Main circuit topology apply AC-DC-AC, a combination of control areas used the integrated chips and MCU. The research is divided into the following elements:(1)Design a 5KW system to achieve the effective APFC (APFC) system to enhance the power factor and the reduction devices on the electric locomotive power grid pollution;(2)Successful design switching power supply based on the UC3842;(3)Design a safe, stable and reliable boost chopper circuit based on the SG3525, effectively controls the power transform the intermediate links, and DC power inverter to achieve the required targets;(4)Based on the design of the MCU PIC16C74 monitoring system, real-time detection of the power parameters and air-conditioning compressor operation, convenient, fast detection of power supply voltage, current and timely troubleshooting;(5)Debug circuit in the process, encountered many such as EMC (EMC), the dynamic response and other issues, the paper also encountered similar problems of reliability done a detailed analysis and proposed solutions.After over all aspects of simulation and debugging of the actual circuit, the basic function of each module has been to achieve, to meet the needs of the power system applied to the working field.