When performing commutation at induction motors based in PWM, a change in the switching frequency can take several clock cycles to be reflected in the windings generating harmonics that could damage the motor or generate an erroneous modulation. Most of the high-performance inverters use the Space Vector PWM given its minor switching losses and its capability to reduce the harmonics in the output signals. Nonetheless, the SVPWM requires complex calculation in online operation, which is the major concern for real-time implementations. Even that there are problems related to the development of technology that does not use the sine waveform to drive an induction motor and considering the availability and capability of Direct Digital Synthesizers (DDS) technology, we developed a hardware–software system to propose a modulation strategy called Space Vector DDS. The SVDDS can synthesize any digital waveform besides the sine waveform, becoming a more versatile approach. This proposal is the first one to couple the DDS in the commutation of an induction motor. As summary, the main features of our SVDDS system are its capability to synthesize any discrete waveform, improvement of control response parameters (13% for a load test and 12% for a speed test, compared with SVPWM), a low value of the total harmonic distortion index (4.88%) and reduction of the mathematical processing (system response of 21.364 ns).

在基于PWM的感应电动机上进行换向时，开关频率的变化可能需要几个时钟周期才能反映在绕组中，从而产生谐波，从而可能损坏电动机或产生错误的调制。鉴于大多数高性能逆变器的开关损耗较小，并且具有降低输出信号谐波的能力，因此大多数都使用空间矢量PWM。但是，SVPWM在在线操作中需要复杂的计算，这是实时实现的主要考虑因素。即使存在与不使用正弦波形来驱动感应电动机的技术开发相关的问题，并考虑到直接数字合成器（DDS）技术的可用性和功能，我们开发了一种硬件-软件系统来提出一种称为空间矢量DDS的调制策略。SVDDS可以合成除正弦波形之外的任何数字波形，从而成为一种更加通用的方法。该提议是第一个将DDS耦合到感应电动机换向中的提议。综上所述，我们的SVDDS系统的主要功能是能够合成任何离散波形，改善控制响应参数（与SVPWM相比，负载测试的13％和速度测试的12％），总值低谐波失真指数（4.88％）和数学处理的减少（系统响应为21.364 ns）。