利用數位信號處理器為基礎之單相變頻器的研製

Design and Implementation of Single-Phase Inverter using Digital Signal Processor

陳良信(Liang-Shen Chen)

指導教授 ： 賴炎生

國立臺北科技大學/電資學院/電機工程系所/碩士(2010年)

摘要

本論文主要研製一數位控制的單相直流/交流變頻器，採用正弦波脈波寬度調變法單極性電壓切換技術，使得輸出端可得到一穩定之單相交流電源，亦可做為一般再生能源供電系統之後級轉換器。
本文採用全橋式轉換器為變頻器之主架構，主要由四個金氧半場效電晶體、電感、電容所組成，並且利用Microchip公司之dsPIC30F2020作為控制核心，其設計規格為輸入電壓200 V，輸出電壓110 Vrms/60 Hz，額定功率1000瓦，開關切換頻率9.6 kHz。
由實驗結果證明，在輸入電壓200 V及各負載條件下，輸出電壓均能穩在命令值，在額定負載情況下，效率高於97%，電壓總諧波失真小於5%。由模擬及實驗結果驗證系統的正確性。

關鍵字

數位信號處理器 ； 單極性電壓切換 ； 直流/交流變頻器

並列摘要

A digital-controlled single-phase DC/AC inverter with sinusoidal pulse width modulation and uni-polar voltage switching is designed and implemented. The DC/AC inverter is able to provide a stable output, which can also be used as an second stage of a renewable energy power supply converters. In this paper, the full bridge inverter consists of four MOSFETs, inductors and capacitors. Microchip dsPIC30F2020 is used as the control unit. The design specifications are as follows: input voltage is 200 V, output voltage is 110 Vrms/60 Hz, rated power is 1000 W and switching frequency is 9.6 kHz. Under various load conditions with rated input voltage, the output voltage can be stabilized within its reference value. Under nominal load conditions, the efficiency is higher than 97% and the total harmonic distortion of the output voltage is less than 5%. The simulation and experimental results verify the correctness of the system.

並列關鍵字

Digital Signal Processor ； Unipolar Voltage Switching ； DC/AC Inverter.

參考文獻

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