PI Current Control Method for Realizing Deadbeat Characteristics

In motion control systems, detailed characteristics of current control systems are usually not considered. However, as the performance of the overall system advances, higher-performance current control systems are required. This paper proposes a novel PI current control method for realizing deadbeat control characteristics. Conventional deadbeat control is complicated because it is necessary to calculate the pulse width for each sampling cycle. On the other hand, proposed method achieves deadbeat characteristics easier than conventional method by simply determining the PI gains. It can also be applied to multi-level inverters. By simulations and experiments, we confirm that the deadbeat characteristic is obtained. The robustness of the system against disturbances and modeling errors is also confirmed.