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Research on High Power Bi-Directional DC-DC Converter for Hybrid Electric Vehicle

Author: FanZuo
Tutor: ZhangDongLai
School: Harbin Institute of Technology
Course: Electrical Engineering
Keywords: Hybrid buses Super capacitor Bi - directional DC-DC converter IGBT driver PID closed loop control
CLC: TM46
Type: Master's thesis
Year: 2009
Downloads: 436
Quote: 5
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Abstract


With the increasingly serious environmental pollution and energy crisis, the hybrid buses as a green urban transport in recent years by widespread concern. Super capacitor energy storage devices as a new kind of hybrid, has a specific power, fast charge and discharge, long cycle life characteristics, to meet the city bus traffic when frequent starting and stopping of the electric high power demand and brake feedback rapid recovery of energy requirements. But the working range of voltage variation of the super capacitor large hybrid passenger motor driver powered unfavorable factors, while the bi-directional DC-DC power converter is the key to solving this problem, it can be efficiently performed according to the driving conditions in energy conversion, thus optimizing motor control, in order to improve the dynamic performance and driving ability ultracapacitor hybrid buses. In this paper, several bi-directional DC-DC power conversion circuit performance advantages and disadvantages of the application of the technical characteristics of the hybrid, selected bidirectional half bridge Buck / Boost conversion topology to achieve the two-way flow of energy of the entire power system, and the design of the main circuit parameters. Using state space averaging method to analyze the direction of power flow mode of two bi-directional DC-DC converter, small signal control model, and select the appropriate PID compensation network to improve system stability and fast. IGBT driver features foundation theoretical simulation method study IGBT and linkage static uneven flow of influencing factors, summed up the effective improvement measures, for the design of the bi-directional DC-DC converter IGBT drive and parallel power expansion provides reference. And a peripheral driver circuit for 2ED300C17-S module design to meet the requirements of a high power IGBT driver in parallel and IGBT driven reliably. Super capacitor hybrid powered buses operating characteristics, design two independent PID closed-loop controller, the corresponding energy conversion mode bus voltage of the inverter control, so that stable and effective operating voltage range. MCU bi-directional DC-DC circuit working condition monitoring and automatic switch, and solve the undervoltage and overvoltage protection electrical motor drive inverter functional limitations, enabling rapid energy conversion. Developed to complete the bi-directional DC-DC power converter through the test rig to simulate actual road conditions, with the state change of the motor work can be realized and efficient drive and fast energy recovery and control time is short, the recovery efficiency is high. The above work provides technical reserves for the further study of the hybrid system vehicle test.

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CLC: > Industrial Technology > Electrotechnical > Transformers, converters and reactors > Converter
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