Dissertation > Excellent graduate degree dissertation topics show

Application Research for Buck Converter on Variable Structure Control

Author: LuoCheng
Tutor: ZhangChangFan
School: Hunan University
Course: Power Electronics and Power Drives
Keywords: DC - DC buck converter Sliding Variable Structure State observer Load identification
CLC: TM46
Type: Master's thesis
Year: 2008
Downloads: 221
Quote: 3
Read: Download Dissertation

Abstract


This paper aims to study the theory and technology of sliding mode variable structure control theory is applied to a Buck converter, seek practical sliding mode controller design method. Several practical sliding mode control scheme design is the focus of this article, and the Buck converter design load identification based on the state of the theory of variable structure observer, and strive to achieve the practical use of the sliding mode control switching converter to improve the robustness of the converter when the internal parameter variations and external disturbances, and improved dynamic characteristics. First of sliding mode control theory and its application in the control of the switching converter discussed research at home and abroad, noting that the current mode variable structure control switching converter, a number of problems and solutions. In the second Buck model designed sliding mode controller based on exponential reaching law, and do more in-depth analysis of frequency and general analysis, and conventional proportion integral control PWM control switching converter The comparative analysis further confirmed the advantages of the sliding mode control manifested. Sliding mode variable structure algorithm jitter phenomenon exists, there is no way to completely avoid it can only try to suppress. So that the trajectory of the movement speed and trajectory and the distance of the sliding surface associated to suppress jitter based on exponential reaching law is designed based on adaptive reaching law sliding mode controller; system reaches the sliding mode the surface with a reaching law, another when sliding in the sliding surface reaching law, which was designed based the adaptive variable speed reaching law sliding mode controller. And two controllers are used in the load voltage deviation, the deviation of the dynamic rate of change and the inductor current state variables on the third Buck Converter Simulation results show that the the two controller can effectively suppress jitter. Due to the the controller basic state variable load feedback, so the design of effective state observer is the key to achieve control. This article first integral reconstruction method using inductively current reconstructed output voltage, and then use the equivalent principle of sliding mode control, a sliding mode state observer-based design methodology, and complete the Buck converter state observer design and sliding mode variable structure theory based on the load of the Buck converter online identification can be seen from the comparative simulation experiments to design better track of the load of the system. Finally, the observed state observer status variable load online identification feedback to the controller, which has been with the state observer, the load identification sliding mode controller and its application in the Buck converter. Through a variety of simulation input voltage and load mutation, you can see that the suppression of the controller in the system jitter, response speed, to reach steady state and time have a good effect.

Related Dissertations

  1. Study on Moving Mass Control Method for Reentry Warhead,TJ765.23
  2. The Development of Linear Motor Cooling Controllers Based on DSP,TM359.4
  3. Observer-based brushless DC motor control method,TM33
  4. Research on Sensorless Vector Control of PMSM,TM341
  5. State Observer of Radiant Signal and Its Application Research in Combustion Optimal Control,TK223.7
  6. Research on Performance of Smart Grid Stuctures of Composite Materials,V229.7
  7. Research on Fault Diganosis for Time-Delay Systems,TH165.3
  8. Load Identification for A Composite Laminated Plate and Shell,TB535.1
  9. A Study on Semi-active Multi-modal Vibration Damping Based on State-Observer,TB535
  10. The Control Strategy Research of Networked Control System,TP273
  11. Sliding Mode Variable Structure Controller Design on Torsional Vibration Suppression of Rolling Mill Drive System,TG333
  12. Non-intrusive Load Monitoring Based on Transient Characteristics,TM714
  13. Research of Sliding Mode Variable Structure Techniques on AC Motor Control System,TM34
  14. Research of Steam Temperature Control System in 600MW Super-critical Unit,TM621.6
  15. Research on Speed-Sensorless Vector Control System for Asynchronous Motor,TM343
  16. Study on Improved Direct Thrust Control Technology for Permanent Magent Linear Synchronous Motor,TM341
  17. Research on Control of the Three DOF Hovering System with Quadrotor,TP29-AD
  18. Design of Robust Controllers for Uncertain T-S Fuzzy Systems,TP11
  19. Permanent magnet synchronous motor servo system speed observatory,TM341
  20. The Research on DC/DC Converter Control Scheme,TM46
  21. Application Research of Force Identification Based on Least Squares Method in the Frequency Domain,U661

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