NDLI: Computationally efficient multi-step direct predictive torque control for surface-mounted permanent magnet synchronous motor

Content Provider	IET Digital Library
Author	Xia, Changliang Zhou, Zhanqing Wang, Zhiqiang Yan, Yan Shi, Tingna
Abstract	The multi-step direct model predictive control (M-DMPC) could reduce the switching frequency and improve the efficiency of the motor drive system while ensuring good steady and dynamic performance. However, the conventional M-DMPC, which uses the exhaustive optimisation method is with exponential time complexity, so it is difficult to realise in a short sample period. This study proposes a multi-step direct predictive torque control (M-DPTC) algorithm for two-level voltage source inverter fed surface-mounted permanent magnet synchronous motor (SPMSM) drive system. In the proposed algorithm, first, in order to reduce computation time in multi-step predictive process, a simplified multi-step predictive model is established. Compared with the complex operations, like square root and trigonometric function used in the conventional predictive model, only look-up table and addition operation are utilised in the proposed model for multistep prediction. Second, compared with the exhaustive searching method, the proposed optimisation method avoids the exploration of all possible switching sequences and has logarithmic time complexity. Combining the above two measures, the proposed M-DPTC can be achieved in a relatively shorter sample period. Simulation and experimental results for a 6-kW SPMSM are presented to validate the proposed algorithm.
Starting Page	805
Ending Page	814
Page Count	10
ISSN	17518660
Volume Number	11
e-ISSN	17518679
Issue Number	Issue 5, May (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-epa/11/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2016.0221
Journal	IET Electric Power Applications
Publisher Date	2017-05-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Computationally Efficient-multistep Direct Predictive Torque Control Control of Electric Power System Drive Dynamic Performance Exhaustive Optimisation Method Exhaustive Searching Method Exponential Time Complexity Invertors Look-up Table M-DMPC M-DPTC Algorithm Machine Control Mechanical Variables Control Motor Drive System Multistep Direct Model Predictive Control Multistep Prediction Multistep Predictive Process Optimal Control Optimisation Optimisation Method Optimisation Technique Permanent Magnet Motors Power 6 KW Predictive Control Square Root Steady Performance Surface-mounted Permanent Magnet Synchronous Motor Switching Frequency Reduction Efficiency Switching Sequence Synchronous Machine Synchronous Motor Drive Torque Control Trigonometric Function Two-level Voltage Source Inverter-fed SPMSM Drive System
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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