【摘要】：開關磁阻電機（Switched Reluctance Motor，簡稱SR電機）具有結構簡單堅固、運行可靠性高、控制靈活、成本低廉等優(yōu)良性能，其轉子由硅鋼片疊壓而成，無繞組或永磁體，能承受很大的機械離心力，特別適合用在高速/超高速領域。目前在SR電機的實際應用中，很少將SR電機應用于電動工具產(chǎn)品中，本文正是基于這一需求，，研究開發(fā)電動工具用高速SR電機本體結構和驅動控制系統(tǒng)，充分發(fā)揮SR電機優(yōu)點，為高速SR電機在電動工具上的應用提供較為完整的基本理論和關鍵技術支撐。 本文首先介紹了高速SR電機的理論和工程應用情況，綜合對比分析目前應用在電動工具中的各種類型電機研究現(xiàn)狀，在此基礎上設計了一臺額定功率1kW、額定轉速17000r/min的三相6/4極高速SR樣機，并通過Ansoft有限元分析軟件對樣機進行電磁場分析，優(yōu)化了結構參數(shù)，仿真結果驗證了樣機設計的正確性。其次研究了幾種典型的功率變換主電路，選出適合本實驗樣機的功率變換主電路，同時為改善SR電機高速運行時換相能力，提出一種可提高電機換相性能的三開關功率變換主電路結構，并進行了仿真對比分析。最后對各模塊硬件電路進行設計并實現(xiàn)，在此基礎上搭建了高速SR電機實驗系統(tǒng)平臺，并進行了現(xiàn)場工況實驗。實驗表明，系統(tǒng)高速運行穩(wěn)定，達到了設計要求，突破了部分關鍵技術，驗證了本系統(tǒng)設計方案和設計過程的正確性。
[Abstract]:Switched reluctance motor (Switched Reluctance Motor,) has the advantages of simple structure, high reliability, flexible control, low cost and so on. Its rotor is made of silicon steel laminated and has no winding or permanent magnet. Can withstand large mechanical centrifugal force, especially suitable for high-speed / ultra-high speed field. At present, in the practical application of SR motor, the SR motor is seldom used in the electric tool product. Based on this demand, this paper studies and develops the structure and driving control system of the high-speed SR motor for electric tools, so as to give full play to the advantages of the SR motor. It provides the basic theory and key technology support for the application of high speed SR motor in electric tools. This paper first introduces the theory and engineering application of high speed SR motor, synthetically analyzes the research status of various kinds of motors used in electric tools, and then designs a rated power 1 kW. The three-phase 6 / 4 pole high speed SR prototype with rated speed 17000r/min is designed. The electromagnetic field of the prototype is analyzed by Ansoft finite element analysis software, and the structural parameters are optimized. The simulation results verify the correctness of the prototype design. Secondly, several typical power conversion main circuits are studied, and the main power conversion circuits suitable for this experimental prototype are selected. Meanwhile, in order to improve the commutation ability of SR motor at high speed, This paper presents a three-switch power conversion main circuit structure which can improve the commutative performance of the motor, and carries on the simulation contrast analysis. Finally, the hardware circuit of each module is designed and implemented, and a high-speed SR motor experimental system is built on this basis, and the field working condition experiment is carried out. The experiments show that the system runs stably at high speed, meets the design requirements, breaks through some key technologies, and verifies the correctness of the design scheme and design process of the system.
【學位授予單位】：湖南工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM352

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