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Disturbance Rejection Enhanced Two-Degree-of-Freedom Current Controller Using Active Damping Function for PMSM System
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DOI：10.1109/jestpe.2026.3687540.png)
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Abstract
En 中文
The two-degree-of-freedom (2-DoF) control strategy is widely used in motor drives to decouple their control performances. However, due to the negative impacts caused by direct current (DC) and AC disturbances, the disturbance rejection ability of this strategy cannot fully satisfy the strict requirements of some high-precision permanent magnet synchronous motor (PMSM) drive applications. Notably, a variety of sophisticated observers proposed in existing PMSM drive research can also be categorized as 2-DoF control architectures, yet they are typically plagued by intricate implementation procedures and high computational burdens. To address this issue, this article proposes a new 2-DoF controller based on an active damping function (ADF). Based on the disturbance transfer function, the ADF is designed and analyzed in the continuous domain to suppress low- and high-frequency disturbances. The system performance in the case of parameter mismatch is also analyzed. In addition, different from existing literature, in this article’s analysis, the influence of noise on the controller was considered to provide a basis for parameter design. Finally, experiments were conducted to verify the performance of the 2-DoF controller based on the ADF proposed in this article.
Keywords:
Active damping function (ADF)
disturbance rejection
permanent magnet synchronous motor (PMSM)
two-degree-of-freedom (2-DoF) control
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