Active Flux Based Advanced Encoderless AC Drives: A Tutorial Review

"Active flux" is an alternative unitary concept for the control of practically all ac drives. As aligned to rotor d- axis (for synchronous and flux-modulation machines) and to rotor flux axis for induction machines, "active flux" is a physical/technical concept that turns all tra...

Full description

Saved in:
Bibliographic Details
Published inIEEE transactions on power electronics Vol. 39; no. 10; pp. 13510 - 13523
Main Authors Boldea, Ion, Popa, Ana-Adela, Blaabjerg, Frede
Format Journal Article
LanguageEnglish
Published IEEE 01.10.2024
Subjects
AC drives
active flux
encoderless control systems
Magnetic flux
maximum torque per ampere (MTPA)
maximum torque per flux (MTPF)
maximumCos<named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX"> Fi</tex-math> </inline-formula> </named-content>
Observers
Rotors
Saturation magnetization
Stators
Torque
Vectors
Online AccessGet full text

Cover

More Information
Summary:"Active flux" is an alternative unitary concept for the control of practically all ac drives. As aligned to rotor d- axis (for synchronous and flux-modulation machines) and to rotor flux axis for induction machines, "active flux" is a physical/technical concept that turns all travelling field physically salient electric ac machines into a functionally nonsalient model. As its position is independent of load torque (for known machine parameters) it leads to notable simplifications in encoderless advanced control of ac drives. This tutorial review summarizes the fundamentals of the "active flux" concept as applied to practically all ac machines and the progress from 2008 to today with sample literature results. It also introduces in draft the theory of applying "active flux" to MTPA, MaxCosFi, maximum torque per flux (MTPF) integrated into smooth control of ac drives, for constant and variable magnetic saturation, with promising recent results for a reluctance synchronous motor drive. Weighting "active flux" merits and demerits and offering new workfronts in its application the article is hoped to assist in producing even better ac motor/generator drives in the future.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2024.3405073