Abstract
In this research, based on the ultra-local model, a novel compound model-free control strategy with an intelligent Proportional-Integral and super-twisting Sliding Mode Control (MFiPISTSMC) strategy for permanent magnet synchronous motor (PMSM) drives is proposed. Firstly, an intelligent Proportional-Integral (iPI) control strategy is designed for motor speed regulation. Secondly, a super-twisting Sliding Mode Control (STSMC) strategy is constructed based on the ultra-local model of PMSM. At the same time, the unknown term of the ultra-local model of PMSM is estimated by a Linear Extended State Observer (LESO). The stability of the compound MFiPISTSMC strategy is proved by the Lyapunov stability theorem. As a result of the compound MFiPISTSMC strategy integrating the STSMC strategy, the iPI control strategy and the LESO is proposed to have excellent performance. Finally, the static characteristic, dynamic characteristic and robustness of the novel compound MFiPISTSMC strategy are verified by simulation and experimental results.
Highlights
Due to some advantages, such as simple structure, small volume, high efficiency, and high power factor, the permanent magnet synchronous motor (PMSM) has been widely used in many applications such as in aerospace actuation [1], electric vehicles [2,3], and suspended positioning systems [4].Because of the invention of the PMSM, a multitude of scholars have not stopped studying control strategies
The stability of the proposed control strategy will be proved by the Lyapunov stability theorem
The novel control diagram of speed regulation system consists of a proposed strategy, an Linear Extended State Observer (LESO), block diagram of PMSM speed regulation system consists of a proposed MFiPISTSMC
Summary
Because of the invention of the PMSM, a multitude of scholars have not stopped studying control strategies. Many control theories have been widely and effectively applied to the speed regulation system of the PMSM, which can be roughly divided into two categories: model-related control and model-free control (MFC). The PMSM cannot be accurately represented by the mathematical model, which bring challenges and troubles to the model-related control. The MFC strategy was introduced only a few years ago, the traditional Proportional-Integral (PI) control strategy, as the most widely used MFC strategy, has been widely applied in the PMSM speed regulation system [9,10]
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