Let B be a complex vector space generated by some simple closed curves in the annulus.
设B是一个复的向量空间，它是由环链在平环上的简单闭曲线生成。
On the foundation of this, utilizing the complex trait of space voltage vector, aiming at the different representation of space voltage vector, we give the different SVPWM arithmetic steps.
在此基础上，利用空间电压矢量合成特性，给出了针对空间电压矢量不同的表示方法对应的不同的SVPWM算法步骤。
It is a complex vector which have obvious heterogeneity of the distribution in space and a variability with time.
它是一个复合向量，具有明显的空间分布的非均一性和随时间变化的非定常性。
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