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Three‐Phase Current Control by Dynamic Reconstruction of Undetected Currents for AC Motor Drives
Author(s) -
SHINNAKA SHINJI,
ISHIDUKA TAKUMI
Publication year - 2017
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.22934
Subject(s) - current (fluid) , phase (matter) , three phase , component (thermodynamics) , control theory (sociology) , frame (networking) , reference frame , computer science , stationary reference frame , engineering , control (management) , physics , induction motor , voltage , electrical engineering , artificial intelligence , telecommunications , quantum mechanics , thermodynamics
SUMMARY This paper proposes new three‐phase current control methods for AC motor drives, which detects only a phase current from among three‐phase currents. The first proposed method first detects a phase current, and then estimates the two‐phase current in the stationary reference frame using the detected single phase current. The second proposed method first detects a phase current, then synthesizes the two‐phase quasi‐current in the dq rotating reference frame, and finally produces two‐phase current estimates by extracting the positive‐phase component from the quasi‐current. The third proposed method produces two‐phase current estimates by filtering out the negative‐phase component from the quasi‐current. This paper presents the principles and detailed characteristic analyses of the proposed methods and validates them on the basis of extensive experiments.