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Digital Control of the power of communication

Author: YangLi
Tutor: JiangQiLong
School: Southwest Jiaotong University
Course: Rail transportation electrification and automation
Keywords: Communication power DC / DC converter Fuzzy Adaptive PID Frequency response method
CLC: TN86
Type: Master's thesis
Year: 2008
Downloads: 329
Quote: 1
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Abstract


With the development of information society , the electrical equipment on the increasing demand for high quality power supply , digital control with its many advantages is gradually becoming a power in the field of new hot spots. In this paper, the characteristics and advantages of digital control of power electronics technology used in digital control technology for the in-depth study . Paper introduces the digital control features, advantages , and the current market situation, pointed out the digital control challenges in the application of digital control technology for power -depth research, including sample and hold and delay effects , digital control strategy how to improve communication power precision digital control systems existing in some of the major issues . Contents of this paper is communication power digital control , the establishment of DC / DC converter based on a mathematical model is proposed design of digital controllers in three ways: frequency response method , digital PID control algorithm and fuzzy adaptive PID control algorithms. Frequency response method takes into account the zero -order hold , sample and calculate the delay impact on the system , the design of digital controller is very accurate, but the load in a wide range of changes, poor dynamic performance . Digital PID algorithm is relatively simple digital control of the converter is still play an important role . Fuzzy adaptive PID control algorithm is very flexible and can change according to the output voltage automatically adjusts PID parameters , greatly improving the dynamic performance of the converter . The power light load or no load, reduce the switching frequency approaches used to prevent system oscillations , reduce the output voltage ripple. In order to achieve this control strategy , designed a 140W power of communication . With TI's TMS320F2801 as the core control chip , with half-bridge converter for the test platform to achieve the communication power of digital control and digital management . Experimental results show that this control strategy has good dynamic performance , the algorithm is relatively simple to achieve high reliability, is a more practical control algorithms.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio equipment,telecommunications equipment > Power supply
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