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Speed estimation of induction motor drive using d ‐axis slot harmonics and parameter identification method
Author(s) -
Noguchi Toshihiko,
Onaka Masahito
Publication year - 2010
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.20901
Subject(s) - harmonics , control theory (sociology) , rotor (electric) , controller (irrigation) , induction motor , permeance , air gap (plumbing) , filter (signal processing) , dimension (graph theory) , engineering , computer science , mathematics , electrical engineering , materials science , control (management) , agronomy , permeation , pure mathematics , composite material , biology , genetics , voltage , artificial intelligence , membrane
This paper describes a rotor speed estimation technique of an induction motor, which utlizes slot harmonics on the d ‐axis caused by permeance variation across the air gap. The frequency of the slot harmonics is a multiple of the actual rotor speed, and is proportional to the number of rotor slots. In order to extract the slot harmonics, a novel adaptive bandpass filter incorporating coordinate transformation is proposed, which is effective to estimate the rotor speed from 400 to 2000 rpm. This rotor speed estimation is applied to a field‐oriented controller as well as a speed controller. In addition, performance improvement is carried out by compensating a motor parameter mismatch. Feasibility of the proposed technique is confirmed through several tests, using a prototype experimental setup. © 2010 Wiley Periodicals, Inc. Electr Eng Jpn, 171(2): 50–58, 2010; Published online in Wiley InterScience ( www. interscience.wiley.com ). DOI 10.1002/eej.20901