論文標(biāo)準(zhǔn)WORD格式排版 57頁

摘 要： 本文介紹了變頻調(diào)速三相異步電動機(jī)的電磁設(shè)計特點和結(jié)構(gòu)特點，在設(shè)計時充分考慮變頻器輸出電壓和電流中所包含一系列的高次諧波給電機(jī)性能帶來的不利影響，這包括對電機(jī)的額定電流、功率因數(shù)、損耗及效率的影響，并且實例計算了其影響的程度。這都為變頻調(diào)速三相異步電動機(jī)的工程設(shè)計提供了有力的設(shè)計依據(jù)。目前，在各大鋼鐵行業(yè)上的主軋機(jī)，卷取機(jī)及開卷機(jī)當(dāng)中的主拖動電機(jī)，幾乎全部選用了變頻調(diào)速電動機(jī)。變頻調(diào)速電動機(jī)對電機(jī)的各項指標(biāo)要求都較高，本文通過對一臺7.5kW低壓變頻電動機(jī)的設(shè)計，分析了變頻調(diào)速電動機(jī)的電磁設(shè)計特點和結(jié)構(gòu)設(shè)計特點，分析了如何選取額定點，如何選取電機(jī)的參數(shù)來滿足機(jī)械負(fù)載的要求，這對變頻電機(jī)的工程設(shè)計具有一定的參考價值。
關(guān)鍵詞: 三相感應(yīng)電機(jī)；變頻調(diào)速；設(shè)計

Abstract：In this paper the design and structure characteristics of variable-frequency
adjustable-speed three-phase induction motors are introduced. During the design process some unfavorable influence on the performance of motor is fully considered ，such as higher harmonic in the output voltage and current caused by inverter. The influences on rated current, power factor, loss and efficiency are included. Then theextent of such influences is calculated by means of experiments. All of these provide solid basis for engineering design of variable--frequency adjustable-speed three-phase induction motors. At present, the primary driving motors of main rolling machines, curling machines and decoilers in steel&iron industries are mostly variable-frequency adjustable-speed motors. Correspondingly the qualifications of these motors are much stricter. In this paper, we analyzed the electromagnetic and structure design characteristics of a 7.5kW low-voltage variable-frequency motor. During this process problems such as how to select the rated points and how to select parameters of the motor in order to meet the requirements of mechanical load are introduced in detail. All of these give references to engineering design of variable-frequency motor.
Key words: three-phase induction motors; Variable-frequency adjustable-speed;
design