电机与控制应用
電機與控製應用
전궤여공제응용
ELECTRIC MACHINES & CONTROL APPLICATION
2014年
9期
39-44,50
,共7页
直流电动机%旋转磁动势%电流相位自控%磁场箝位%广义直流电动机
直流電動機%鏇轉磁動勢%電流相位自控%磁場箝位%廣義直流電動機
직류전동궤%선전자동세%전류상위자공%자장겸위%엄의직류전동궤
DC motor%rotating mmf%self-controlled current phase%clamping in field%generalized Dc motor
从以交流观点分析直流电动机的电枢旋转磁动势着手，阐明多相矩形波电流产生合成磁动势的效果与三相正弦波电流相当，电枢电流相位自控条件下必形成气隙磁场箝位。对正弦波电枢电流实施相位自控在技术上复杂许多，矢量控制则是对正弦波电流实施相位自控的有效手段。三相正弦交流的电机本体内气隙磁场箝位还呈功角或转矩角可行调整的特点，但与同步电机以功角作为自变量有本质差异。据此，联系电机可逆运行原理也能辨明广义直流电动机不是同步电机的新发展而是直流电机的新发展。
從以交流觀點分析直流電動機的電樞鏇轉磁動勢著手，闡明多相矩形波電流產生閤成磁動勢的效果與三相正絃波電流相噹，電樞電流相位自控條件下必形成氣隙磁場箝位。對正絃波電樞電流實施相位自控在技術上複雜許多，矢量控製則是對正絃波電流實施相位自控的有效手段。三相正絃交流的電機本體內氣隙磁場箝位還呈功角或轉矩角可行調整的特點，但與同步電機以功角作為自變量有本質差異。據此，聯繫電機可逆運行原理也能辨明廣義直流電動機不是同步電機的新髮展而是直流電機的新髮展。
종이교류관점분석직류전동궤적전추선전자동세착수，천명다상구형파전유산생합성자동세적효과여삼상정현파전류상당，전추전류상위자공조건하필형성기극자장겸위。대정현파전추전류실시상위자공재기술상복잡허다，시량공제칙시대정현파전류실시상위자공적유효수단。삼상정현교류적전궤본체내기극자장겸위환정공각혹전구각가행조정적특점，단여동보전궤이공각작위자변량유본질차이。거차，련계전궤가역운행원리야능변명엄의직류전동궤불시동보전궤적신발전이시직류전궤적신발전。
Based on the analysis of the armature rotating mmf of dc motor according to ac viewpoint, it was explained that the resulting mmf produced by multiphase currents with rectangular wave corresponds to that produced by three phase currents with sine wave. The clamping effect in field is always formed on condition that the phases of armature current are self-controlled. It is more complex on technique to carry out self-controlling the phases of sine-wave current, but the transvector control is an effective measure for this purpose. The clamping effect in the motor body with three phases sine-wave currents has the character of adjustable power angle or torque angle, but it is essentially different to the synchronous motor where the power angle is an independent variable.
