Effect of Phase-Shift Angle on a Delta-Connected Autotransformer Applied to a 12-Pulse Rectifier
Effect of Phase-Shift Angle on a Delta-Connected Autotransformer Applied to a 12-Pulse Rectifier
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DOI：
10.1109/tie.2015.2405058
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发表时间：
2015-02
影响因子：
7.7
通讯作者：
Fangang Meng;Lei Gao;Shiyan Yang;Wei Yang
中科院分区：
文献类型：
--
作者：
Fangang Meng;Lei Gao;Shiyan Yang;Wei Yang
在多脉波整流器中，当自耦变压器的输出电压与输入电压近似相等时，移相角为π/6的三角形接法自耦变压器得到了广泛的应用。如果其输出电压略大于其输入电压，则自耦变压器的等效千伏安（kVA）额定值迅速增加，并且自耦变压器的每个芯柱具有五个绕组。绕组数的增加会增加自耦变压器的不对称性和制造难度。因此，π/6相移角的自耦变压器不适合升压应用。本文分析了铁心柱上有三个绕组的自耦变压器的移相角对输入线电流、输出电压和等效kVA额定值的影响，并提出了一种新的移相角。在相同匝数比下，新移相角三角形接法自耦变压器的等效kVA额定值略大于π/6移相角自耦变压器，但新移相角三角形接法自耦变压器的每个铁心柱上有三个绕组，有利于设计和制造。仿真和实验验证了理论分析的正确性。
The delta-connected autotransformer with π/6 phase-shift angle is widely used in the multipulse rectifier when the output voltage of the autotransformer is approximately equal to its input voltage. If its output voltage is slightly greater than its input voltage, the equivalent kilovoltampere (kVA) rating of the autotransformer increases rapidly, and each core limb of the autotransformer has five windings. The increase in winding number will increase the asymmetry and manufacture difficulty of the autotransformer. Therefore, the autotransformer with π/6 phase-shift angle is not suitable in the boost voltage application. This paper analyzes the effect of phase-shift angle of the autotransformer with three windings in each core limb on the input line current, output voltage, and equivalent kVA rating and proposes a new phase-shift angle. The equivalent kVA rating of the delta-connected autotransformer with the new phase-shift angle is slightly greater than that of the autotransformer with π/6 phase-shift angle under the same turn ratio, but the autotransformer with the new phase-shift angle has three windings in each core limb and is propitious to design and manufacture. Some simulation and experiment are carried out to verify the theoretical analysis.