This letter proposes a fast current control scheme for ac drives by minimizing the latency from current sampling to the updation of a pulsewidth-modulation (PWM) command. By reconstructing the architecture of a linear controller, the minimal necessary steps to obtain the output voltage are deduced as the primary calculation , and the other computation work of the current loop is done in the postcalculation after updating the PWM command. With the proposed method, the computational delay is reduced with negligible loss in the available modulation index, and a higher stability margin or system bandwidth is realized. Also, the developed controller structure exhibits inherited antiwindup characteristics. The technique has been validated by experimental investigations on a permanent magnet synchronous motor.

中文翻译：

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通过最小化更新延迟实现无计算延迟的快速电流控制

这封信通过最小化从电流采样到脉宽调制 (PWM) 命令更新的延迟，为交流驱动器提出了一种快速电流控制方案。通过重构线性控制器的架构，获得输出电压的最小必要步骤被推导出为主要计算，当前循环的其他计算工作在 更新 PWM 命令后的后计算。使用所提出的方法，计算延迟减少，可用调制指数的损失可以忽略不计，并且实现了更高的稳定性裕度或系统带宽。此外，开发的控制器结构表现出继承的抗饱和特性。该技术已通过对永磁同步电机的实验研究得到验证。