Dissertation > Excellent graduate degree dissertation topics show

Research on Bidirectional DC/DC Converter with Ultracapacitor

Author: ChenFang
Tutor: YanGangFeng
School: Zhejiang University
Course: Control Theory and Control Engineering
Keywords: Bidirectional DC/DC Converter Ultracapacitor Interleaved Parallel Unified Controller
CLC: TM46
Type: Master's thesis
Year: 2012
Downloads: 580
Quote: 1
Read: Download Dissertation

Abstract


The non-isolated half-bridge DC/DC converter meets the requirement for electric vehicle and has the advantages of low cost, high efficiency and easy to control. When it needs high current capacity, the interleaved parallel topology is a suitable choice. It reduces the current in each phase and the total current ripple at the same time. In this thesis, the interleaved half-bridge bidirectional DC/DC converter is introduced. After modeling the power stage using a general model, a digital controller with unified control strategy is proposed. The control strategy is verified to have the advantage of smooth bidirectional current flow.To better design the inductor, a deign method combing the optimum of inductor volume index and maximum current is proposed. By reducing the inductor’s volume index, a smaller inductor can be realized, which leads to smaller system volume and higher power density. Reducing the maximum current, the converter is easy to design and loss less.Because the two port of a bidirectional DC/DC converter can be either source or load, a general third-order model is proposed. It typifies the resistive load and battery load in one model. When the load is resistive, the third-order model becomes a second-order one, just like traditional buck and boost converter. When the load is an active one, the model can be simplified into a first-order one.The two switches in each phase are controlled in complementary mode. Based on it, a unified controller that could control the two directional current is designed. It could control the average current followihg the positive and negative current command. The system’s Bode plot shows the system has sufficient gain and phase margin.Finally, the isolate signal acquisition and conditioning circuits are illustrated. The key point in PCB design is also introduced. The proposed power stage circuit and control method are verified on a prototype. The result shows the proposed structure has reach the target current capacity of 150A and can realize bidirectional current flow.

Related Dissertations

  1. Research on Digital Phase-shifting Three-phase Dual Active Bridge Bidirectional DC/DC Converter,TM46
  2. Research on Power Management in Drive System of Hybrid Electric Vehicle,U469.7
  3. Key technology of electric vehicles,U469.72
  4. Simulation Analysis and Control of Multi-power System for Fuel Cell Hybrid Electric Vehicle,U469.7
  5. Study on the Control Strategy of Synergic Electric Power Supply System on HEV,U469.7
  6. The Matching of Energy Sources in Hybrid Energy Sources EV,U469.72
  7. Research on the Machining Technique of Ultrcapacitor Electrode,TG661
  8. Researching on Electric Bus Auxiliary Power Supply System,U469.72
  9. Researched the Hoist Crane Energy Management System Based on Super Capacitor,TH213
  10. Research on Three-Phase Dual Active Bridge Bidirectional DC/DC Converter Based on Digital Control,TM46
  11. Super capacitor DC energy storage system analysis and design,TM53
  12. Research on Bidirectional DC-DC Converter for Battery Formation Equipment,TM46
  13. Study on Software Redevelopment and Application for HEV with Multiple Energy Sources Based on ADVISOR,U469.72
  14. Converter Design and Control in Fuel Cell and Supercapacitor Hybrid Power Generation System,TM46
  15. Study of Optimal Parameter Matching and Optimal Control for Fuel Cell Electronic Vehicle with Ultracapacitor,U469.722
  16. Application Research on a Stand-alone PV System with Ultracapaticor Battery Hybrid Energy Storage,TM912;TM53
  17. Hybrid supercapacitor based energy storage system of hydraulic excavators,TU621
  18. Research on Electrical Power Management of Hybrid Electric Vehicle,U469.7
  19. Design of Interleaved Bidirectional DC/DC Converter for Electric Vehicles,TM46
  20. Design and Research on the Energy Control System of SOFC,TM911.4
  21. Research on the Analysis and Control Strategy of Ultracapacitor DC Storage Energy System Application,TM53

CLC: > Industrial Technology > Electrotechnical > Transformers, converters and reactors > Converter
© 2012 www.DissertationTopic.Net  Mobile