以數位訊號處理器實現多模組並聯之直流-交流轉換器

Implementation of a Paralleled DC/AC Inverter using Digital Signal Processor

鄭晨維(Chen-Wei Zheng)

指導教授 ： 黃明熙 ； 胡國英

國立臺北科技大學/電資學院/電力電子產業研發碩士專班/碩士(2007年)

https://doi.org/10.6841/NTUT.2007.00038

摘要

本文旨在分析及製作多模組並聯之直流-交流轉換器。本系統為兩單相全橋轉換器並聯之架構，其中每一模組為電流模式控制(current-mode control)之單相全橋直流-交流轉換器，以雙電流閉迴路控制使得系統得以均流並增加系統響應速度，多模組並聯採交錯式脈波寬度調變(interleaved pulse-width modulation)模式控制，藉此提供大功率且低諧波失真之電流源輸出，在不提高切換頻率之下， 只要增加n相並聯，其輸出電流漣波等效為切換頻率之2n倍亦可減少輸出低通濾波器之體積。
本文之系統架構先以MATLAB/Simulink建構模擬，並使用低價、運算速度快且擁有強大週邊功能之16位元數位信號處理器(TI DSP TMS320LF2407A)作為控制核心，雙電流閉迴路之控制皆以軟體完成，以全數位化來實現多模組直流-交流轉換器之並聯，減少硬體電路之使用來增加系統可靠度，並可藉由韌體的更新，提高系統運用之彈性。

關鍵字

交錯式控制 ； 多模組並聯 ； 全橋式換流器 ； D型放大器 ； 電流放大器

並列摘要

This thesis is concerned with the analysis and implementation of a paralleled multi-module dc-to-ac converter. A current amplifier with dual modules connected in parallel is presented based on interleaved pulse-width modulation control, so as to increase the carrier frequency at output and hence to improve the output current capacity reduce the output current ripple and the size of output as well as the low-pass filter. Also, a current sharing controller is added to make the current following through modules evenly distributed.
In order to facilitate the studies performed in this thesis, a simulink-based simulation environment for the established interleaved current amplifier is build up first. Then a cost-effective hardware circuit is constructed using a digital signal processor TMS320LF2407A manufactured by Texas Instrument. All the control schemes are fully digitally implemented in a DSP-based controller. The proposed hardware structure can enhance the system reliability and make the system more flexible.

並列關鍵字

interleaved control ； paralleled multi-module ； full-bridge converter ； D-type amplifier ； current amplifier

參考文獻

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