switching angle meaning in Chinese

回舵首向角
开关角

The performance of the electric vehicle is improved greatly in which the harmonic wave of output voltage , power loss and torque pulsation of the system are decreased by controlling the switch angles
它运用规则采样法产生正弦脉宽调制波，通过开关角的控制抑制逆变器输出电压中的谐波分量，降低了电动机的损耗和转矩脉动，使电动车的运行性能得到了较大改善。
The main studying contents and achievements in this dissertation are presented as follows . based on the analysis of the selective harmonic elimination pwm mathematical model , an equivalent newton iteration solving method about the switching angles nonlinear transcendental equation set is presented . the algorithmic convergence time is enormously reduced and the algorithmic convergence ability is highly increased
本文的主要研究内容和成果如下：通过对单相特定消谐pwm数学模型的分析，提出了关于开关角非线性超越方程组的等效转化牛顿迭代解法，极大地缩短了算法收敛时间，提高了算法的收敛性，为特定消谐pwm开关角的工程计算提供了新的方法。