An Improved Finite Control Set Model Predictive Current Control for a Two-Phase Hybrid Stepper Motor Fed by a Three-Phase VSI

Chunlei Wang, Dongxing Cao, Xiangxu Qu and Chen Fan
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Chunlei Wang: School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China
Dongxing Cao: School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China
Xiangxu Qu: School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China
Chen Fan: School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China

Energies, 2022, vol. 15, issue 3, 1-17

Abstract: In this paper, an improved finite control set model predictive current control (FCS-MPCC) is proposed for a two-phase hybrid stepper motor fed by a three-phase voltage source inverter (VSI). The conventional FCS-MPCC selects an optimal voltage vector (VV) from six active and one null VVs by evaluating a simple cost function and then applies the optimal VV directly to the VSI. Though the implementation is simple, it features a large current ripple and total harmonic distortion (THD). The proposed improved FCS-MPCC builds an extended control set consisting of 37 VVs to replace the original control set with only seven VVs. The increase in the amount of VVs helps to regulate the current more accurately. In each control period, the improved FCS-MPCC takes advantage of deadbeat control to calculate a reference VV, and only the three VVs adjacent to the reference VV are predicted and evaluated, which decrease the computational workload significantly. Build waveform patterns for all VVs in the unbalanced circuit structure to modulate the optimal VV using discrete space vector modulation, which improves the current quality in reducing current ripple and THD. The comparative simulations and experimental results validate the effectiveness of the proposed method.

Keywords: stepper motor; voltage source inverter; model predictive control; finite control set (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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