具固定激磁電流之定定子電流三相感應馬達驅動器

Constant Stator Current Control for Three-Phase Induction Motor Drive with Fixed Exciting Current

蘇建中(Chien-Chung Su)

指導教授 ： 陳宗成

國立虎尾科技大學/電機資訊學院/電機工程研究所/碩士(2013年)

https://doi.org/10.6827/NFU.2013.00036

摘要

本論文提出一具固定激磁電流之定定子電流三相感應馬達驅動器，其電路架構由三個功率開關、三個功率二極體及兩組直流電源所構成。因應用電流型三開關換流器並配合三相特殊電流波形，此驅動器在運轉時三組馬達線圈輪流開路。且應用其中一組馬達線圈感測合成磁場，以修正馬達定子電流達到固定激磁電流之效果，使得所提驅動器之性能不受馬達參數變動之影響及增加系統穩定性。
另外，本論文使用德州儀器DSP TMS320F2812數位訊號處理器與VisSim發展軟體來完成全數位化之設計及實現。最後，提出部分實驗結果來驗證所提驅動器自動修正激磁電流之正確性。

關鍵字

三相感應馬達驅動器 ； 定定子電流 ； 固定激磁電流

並列摘要

In this thesis, a constant stator current control for three-phase induction motor drive with fixed exciting current is proposed. The motor drive consists of three power switches, three power diodes and two dc power sources. Due to three-switch inverter and the special three-phase current waveforms, three windings of induction motor open alternately in the operation. Therefore, one of winding of induction motor is used to detect air gap flux that it corrects stator current to achieve fixed exciting current. Then performance of the proposed drive can not be affected by variation of motor parameters and the system stability also increases.
Besides, DSP TMS320F2812 and VisSim development software are adopted to design and implement the control for fully digital control circuit. Finally, some experimental results are presented to verify the feasibility of fixed exciting current in the proposed motor drive.

並列關鍵字

three-phase induction motor drive ； constant stator current ； fixed exciting current

參考文獻

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