电机学第2章变压器的基本理论思考题与习题参考答案

2. 解: (1)因为是?、y联结

U1N k?33U2NU1NU1N6?103???15 3U2N0.4?10Z1N?3I1NU12N(6?103)2???360? SN100?103Zm?3?24.65? 9.37p06163?3?2.339? Rm?29.372I022Xm?Zm?Rm?24.652?2.3392?24.539?

400??k2Zm?152?24.65?5546Zm.25? ??k2Rm?152?2.339?526.275? Rm??k2Xm?152?24.539?5521Xm.275? ???Zm?Zm5546.25??15.406 Z1N360?Rm526.275??1.462 Z1N360?Xm5521.275??15.337 Z1N360252(2) Zs????Rm???Xm3?15.124? 9.6219203?3?6.916? Rs?229.62IsXs?Zs2?Rs2?15.1242?6.9162?13.45?

psRs(75?C)?235?75310Rs??6.916?8.246?235?25260

Zs(75?C)?Rs2(75?C)?Xs2?8.2462?13.452?15.777?

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Z??sZs(75?C)?15.777?0.0438 Z1N360 R?Rs(75?C)8.246s?Z?1360?0.0229 NX?s?Xs13.Z?45?0.0374 1N360(3) u?s?Zs?0.0438?4.38% u?sr?Rs?0.0229?2.29%

u?sx?Xs?0.0374?3.74%

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