FBM216電纜P0916DC
電機(jī)具有效率和功率因數(shù)高及轉(zhuǎn)速范圍大等優(yōu)點(diǎn),因此其在高速應(yīng)用領(lǐng)域倍受青睞。相對(duì)于外永磁轉(zhuǎn)子電機(jī),內(nèi)轉(zhuǎn)子永磁電機(jī)具有轉(zhuǎn)子半徑小及可靠性強(qiáng)的優(yōu)點(diǎn),成為高速電機(jī)的。
內(nèi)轉(zhuǎn)子高速永磁電機(jī)的發(fā)展現(xiàn)狀如表2所示??梢钥闯?,內(nèi)轉(zhuǎn)子高速永磁電機(jī)的大功率已達(dá)8 MW,轉(zhuǎn)速15 000 r/min,為面貼式永磁轉(zhuǎn)子,采用碳纖維保護(hù)套捆扎;高轉(zhuǎn)速的永磁電機(jī)為500 000 r/min,功率為1 kW,轉(zhuǎn)子表面線速度為261 m/s,采用合金保護(hù)套。國(guó)內(nèi)對(duì)高速永磁電機(jī)的研究主要集中在浙江大學(xué)、沈陽(yáng)工業(yè)大學(xué)、哈爾濱理工大學(xué)、哈爾濱工業(yè)大學(xué)、西安交通大學(xué)、南京航空航天電機(jī)、東南大學(xué)、北京航空航天大學(xué)、江蘇大學(xué)、北京交通大學(xué)、廣東工業(yè)大學(xué)、南車(chē)株洲電機(jī)有限公司等,他們對(duì)高速永磁電機(jī)有面貼式(SPM)和內(nèi)置式(IPM)兩種轉(zhuǎn)子結(jié)構(gòu)。從表2可看出,除少數(shù)采用內(nèi)置式轉(zhuǎn)子結(jié)構(gòu)外,其余多采用面貼式永磁轉(zhuǎn)子結(jié)構(gòu)。文獻(xiàn)[89]對(duì)一臺(tái)11 kW、50 000 r/min的高速永磁電機(jī)設(shè)計(jì)了內(nèi)置式轉(zhuǎn)子結(jié)構(gòu),該電機(jī)轉(zhuǎn)子表面線速度為233 m/s,轉(zhuǎn)子采用高強(qiáng)度疊片材料。采用常規(guī)疊片材料的高速內(nèi)置式永磁電機(jī),大難度值為1.13×105,大轉(zhuǎn)子表面線速度為135 m/s。
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