电压空间矢量脉宽调制的简单快速算法

A simple and fast algorithm of space vector PWM

提出了电压空间矢量调制的一种简单快速算法,该算法无需进行三角函数以及包含无理数的运算,无需进行复杂的坐标转换,只有普通的四则运算,计算变得非常简单,消除了常规的空间矢量控制算法中由于三角函数和无理数的近似计算而带来的计算误差及影响计算精度和速度的缺点,使结果更加准确。给出了基于本文算法下的DC ACPWM逆变器的实验结果,该结果显示了本文算法的正确性和有效性。

The algorithm of conventional space vector PWM needs complex co-ordinate transformations, trigonometric function and inverse trigonometric function calculations, and this leads more calculation operations and low calculation precision. A novel algorithm of space vector PWM for three-phase voltage fed inverter is proposed. The algorithm has not any co-ordinate transformations, trigonometric function and inverse trigonometric function calculation, and has only normal arithmetic operations. The whole algorithm becomes very simple and the calculation results become more accurate. It can be easily implemented on microprocessor or DSP, and the executing speed is much faster than the conventional space vector PWM. The experiment result of three-phase three-wire DC/AC PWM inverter under the proposed strategy is given, and the result shows its validity and feasibility.