CAJ | 학술논문

对五相容错电励磁双凸极发电机(doubly salient electro- magnet generator，DSEG)的结构特点进行了理论分析。研究了电机空载运行时短路相的自感和电势，分析了短路故障对其他相磁链和电势的影响以及发生短路故障时电机的整流输出电势。对电机在不同励磁电流下加载运行时发生单相绕组短路故障的外特性、功率特性以及短路电流进行了分析。在考虑电枢绕组电阻的情况下，对电机空载运行时在4 个不同时刻发生单相短路故障时的磁场、短路相磁链和短路电流进行了有限元分析。分析结果表明：短路故障发生初始时刻，短路相磁链随着电机转子位置的不同而不同；经过54°电角度后，短路相磁链的最大、最小值和变化趋势与发生短路的时刻无关。最后通过对一台五相20/16-2 结构DSEG 样机进行实验，验证了理论分析的正确性。
대오상용착전려자쌍철겁발전궤(doubly salient electro- magnet generator，DSEG)적결구특점진행료이론분석。연구료전궤공재운행시단로상적자감화전세，분석료단로고장대기타상자련화전세적영향이급발생단로고장시전궤적정류수출전세。대전궤재불동려자전류하가재운행시발생단상요조단로고장적외특성、공솔특성이급단로전류진행료분석。재고필전추요조전조적정황하，대전궤공재운행시재4 개불동시각발생단상단로고장시적자장、단로상자련화단로전류진행료유한원분석。분석결과표명：단로고장발생초시시각，단로상자련수착전궤전자위치적불동이불동；경과54°전각도후，단로상자련적최대、최소치화변화추세여발생단로적시각무관。최후통과대일태오상20/16-2 결구DSEG 양궤진행실험，험증료이론분석적정학성。
In this paper, the structure characteristics of five-phase doubly salient electro-magnet generators (DSEGs) are analyzed theoretically. The self-inductance and voltage of the short-circuit phase are investigated, the flux linkage, voltage of normal phases and the rectified voltage are analyzed when a single phase short-circuit fault happens under the no-load running condition. Meanwhile, the external and power characteristics of the motor and the short-circuit current are investigated with different exciting currents. The magnetic field of the motor, flux linkage of the short-circuit phase and short currents without load are investigated with armature winding resistances in four different short-circuit moments using finite-element method. The analysis results show that the initial flux linkage value of the short-circuit phase is varied with different short-circuit moments, and the minimum value, maximum value and the variation tendency of flux linkage of the short-circuit phase are irrelevant to the fault moment after 54° electrical degree. Finally, the characteristics of a five-phase 20/16-2 DSEG are verified by the experimental results.