电机与控制学报
電機與控製學報
전궤여공제학보
ECTRIC MACHINES AND CONTROL
2014年
2期
50-55
,共6页
张凤阁%杜光辉%王天煜%黄娜%曹文平
張鳳閣%杜光輝%王天煜%黃娜%曹文平
장봉각%두광휘%왕천욱%황나%조문평
高速%永磁电机%通风系统%三维流体场%风摩耗
高速%永磁電機%通風繫統%三維流體場%風摩耗
고속%영자전궤%통풍계통%삼유류체장%풍마모
high-speed%permanent magnet motor%ventilation system%3D fluid field%wind friction loss
针对兆瓦级高速永磁电机的损耗密度大、散热困难、永磁体在高温情况下易发生不可逆退磁的问题,提出了一种径向与轴向混合的⊥型通风系统,通过流体仿真软件Fluent建立了该种通风系统的3D流体场计算模型,并详细分析了通风系统内的流体分布;同时针对高速电机转子表面线速度高(一般可达200 m/s)、转子表面的风摩耗较大且计算复杂的问题,基于所建立的3D流体场模型和解析法,对兆瓦级高速永磁电机的转子转速、转子表面粗糙度及通风量、风道几何参数、气隙大小对转子表面风摩耗的影响进行了研究计算,并总结了相应的规律。分析结果表明,所设计的混合⊥型通风系统具有较好的湍流特性和散热特性,转子转速和气隙大小是影响风摩耗的主要因素。
針對兆瓦級高速永磁電機的損耗密度大、散熱睏難、永磁體在高溫情況下易髮生不可逆退磁的問題,提齣瞭一種徑嚮與軸嚮混閤的⊥型通風繫統,通過流體倣真軟件Fluent建立瞭該種通風繫統的3D流體場計算模型,併詳細分析瞭通風繫統內的流體分佈;同時針對高速電機轉子錶麵線速度高(一般可達200 m/s)、轉子錶麵的風摩耗較大且計算複雜的問題,基于所建立的3D流體場模型和解析法,對兆瓦級高速永磁電機的轉子轉速、轉子錶麵粗糙度及通風量、風道幾何參數、氣隙大小對轉子錶麵風摩耗的影響進行瞭研究計算,併總結瞭相應的規律。分析結果錶明,所設計的混閤⊥型通風繫統具有較好的湍流特性和散熱特性,轉子轉速和氣隙大小是影響風摩耗的主要因素。
침대조와급고속영자전궤적손모밀도대、산열곤난、영자체재고온정황하역발생불가역퇴자적문제,제출료일충경향여축향혼합적⊥형통풍계통,통과류체방진연건Fluent건립료해충통풍계통적3D류체장계산모형,병상세분석료통풍계통내적류체분포;동시침대고속전궤전자표면선속도고(일반가체200 m/s)、전자표면적풍마모교대차계산복잡적문제,기우소건립적3D류체장모형화해석법,대조와급고속영자전궤적전자전속、전자표면조조도급통풍량、풍도궤하삼수、기극대소대전자표면풍마모적영향진행료연구계산,병총결료상응적규률。분석결과표명,소설계적혼합⊥형통풍계통구유교호적단류특성화산열특성,전자전속화기극대소시영향풍마모적주요인소。
Due to high loss density, cooling difficulties, permanent magnet being easy to occur irreversi-ble demagnetization at high temperatures of MW high-speed permanent magnet motor, a kind of radial and axial mixed⊥-shaped ventilation system is presented. Fluid field analysis model of the rotor cooling system was established through fluid simulation software computational fluid dynamics(CFD)-fluent, and then the detailed analysis of fluid distribution was carried out within the ventilation system. At the same time, according to high line speed of rotor surface (generally up to 200 m/s), large wind friction loss of rotor surface and complex calculations, the relationship between wind friction loss and rotor speed, the roughness of rotor surface, ventilation quantity, duct geometric parameters and air gap sizes were investi-gated and generalized based on the established 3D fluid field analysis model and analysis method. The re-sults of analysis show that the mixed ⊥-shaped ventilation system has good characteristics of turbulence and heat dissipation, and the main factors affecting wind friction loss are rotor speed and gap sizes.