SD：星形三角洲

“Star Delta”通常缩写为SD，这种简写方式便于快速书写和日常使用。该术语常见于多个综合领域，尤其是在科幻小说及相关创作中应用广泛。其中文含义为“星形三角洲”，常被用来指代具有星际或未来科技背景下的特定概念、组织或区域。

Based on the technologic requirement, it can help to realize the possibility of auto control of orders of starting and stopping the machine and start in the manner of star delta electric motor with great power and consequently cut down current intensity.
根据工艺要求实现开机顺序和停机顺序的全自动控制，并对大功率电机实行星-三角起动，降低起动电流。
In this paper, a versatile matrix model for assessing system side harmonic impedance of unbalanced three-phase power system is derived through the analysis on the two system models with different connections of star and delta.
通过分析星形和三角形连接下的三相不对称电力系统，推导建立了三相不对称电力系统谐波阻抗的矩阵估计模型。
It is not applicable of star - delta starting to blower - group load;
星-角启动不适用于鼓风机类负载；
Two examples, the proffs of both the formulas for the star - delta transformation and Rosen's theorem, are given in this papaer.
本文就此列举了两个例子：星形与三角形网络等效互换公式的证明以及罗森定理的证明。
Star - delta starting circuit with new type of delay component
使用新型延时器件的星/三角起动线路

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