模擬伺服功率放大器的研究

電氣自動化論文編號:ZD244 此份包含答辯PPT。論文字數:20707,頁數:41

目 錄

摘要…………………………………………………………………………I
Abstract……………………………………………………………………..II
第1章 緒論……………………………………………………………….. 1
 1.1功率放大器的發展及現狀…………………………………………….. 1
 1.2模擬伺服功率放大器研究的目的和意義………………………………. 4
 1.2.1課題研究的目的……………………………………………….. 4
 1.2.2課題研究的意義……………………………………………….. 5
 1.3 課題主要研究內容……………………………………………………7
第2章 模擬伺服功率放大器控制系統…………………………………..8
 2.1模擬伺服功率放大器的系統結構………………………………………8
 2.1.1控制系統方案的確定……………………………………………8
 2.1.2控制系統結構的推導……………………………………………9
 2.2控制系統傳遞函數的推導……………………………………………..10
 2.2.1控制系統組成環節的傳遞函數…………………………………..11
 2.2.2控制系統的傳遞函數…………………………………………....13
 2.3 系統仿真……………………………………………………………. 17
    2.3.1控制系統MATLAB計算及仿真………………………………... 17
    2.3.2動態系統的Simulink仿真……………………………………....18
    2.3.3控制系統參數的選擇…………………………………………....20
 2.3.4控制系統的仿真………………………………………………..21
 2.4小結…………………………………………………………………..27
第3章 伺服電源的構造…………………………………………………...28
 3.1伺服電源的構成……………………………………………………….28
 3.1.1 概述……………………………………………………………28
 3.1.2 伺服電源的構成………………………………………………...29
 3.2伺服電源的實現……………………………………………………….35
    3.3小結…………………………………………………………………..37
結論………………………………………………………………………….38
致謝………………………………………………………………………….39
參考文獻…………………………………………………………………….40

摘  要

 針對目前功率放大器所存在的效率與電磁兼容不相融合的矛盾，分析了模擬伺服功率放大器的系統結構、性能和特點，提出了一種高效、低功耗、低電磁干擾、對環境污染少的模擬伺服功率放大器的設計方法，并進行了系統的MATLAB仿真，在理論上證明了該功率放大器控制系統的可行性和可靠性。
 采用電源輸出電壓隨功放管管壓降偏差和輸入信號變化而隨動的方法，來實現功放管管壓降的恒定，從而實現了功率放大器的高效率與低功耗�；�于對模擬伺服功率放大器性能指標的要求，我們采用諧振變換電路與可控硅整流電路相結合的方法來構造伺服電源。為了避免電磁、射頻干擾所產生的環境污染問題，伺服電源采用過零觸發整流方式。

關鍵詞：模擬伺服功率放大器；伺服電源；可控硅整流；過零觸發

STUDY ON ANALOG SERVO POWER AMPLIFIER
Abstract

 In order to solve the contradiction between efficiency and EMC(Electro-Magnetic Compatibility) of the power amplifier thoroughly, and to reduce the power dissipation and environment pollution , a compact and applied power amplifier with high power and low EMI (Electro-Magnetic Interference) has been developed. The structure of analog servo power amplifier has been constructed and its principle and characteristic has been analyzed. At the same time system MATLAB simulation has been done; the feasibility and the reliability of the power amplifier control system has been confirmed theoretically.
 The supply voltage for the output stage of the amplifier is varied with the input signal and the error between the power amplifier tube and the hoped value, so that the voltage applied to the active output transistor is held small and constant. The power dissipation of power amplifier is reduced and amplifier efficiency is raised appreciably. Based on the requirements to the performances of the analog servo power amplifier, resonant transformation network is used to produce high-frequency sine wave to supply silicon-controlled rectifier. To prevent environment pollution from Electro-magnetic interference and radio–frequency interference, the zero cross triggering is adopted to proceed rectified controllably.

 Key words: Analog servo power amplifier； Servo-supply； Silicon-controlled rectifier； Zero-cross trigger