中文摘要：

设计了一种新型的直接转矩控制矢量调制方法，通过简单可靠的算法得到任意方向与大小的等效电压矢量，并获得恒定的器件开关频率。该方法无需进行极坐标变换，运算量小，是一种快速准确的控制手段。仿真结果表明，在稳态和瞬态条件下都能良好工作。

英文摘要：

In this paper, a improved space vector modulation technique for direct torque control scheme is presented. A equivalent voltage vector of arbitrary direction and magnitude are achieved by a simple and reliable arithmetic, The scheme may be regarded as a development of a DTC aimed at achieving a constant - switching - frequency operation. Owe to the less caculation and have no use for polar transformation, the controllers have the advantage of speediness and veracity. Results of simulation is presented, which show that the presented method works well both in steady state and in transients,