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A new unified analysis of estimate errors by model‐matching phase‐estimation methods for sensorless drive of permanent‐magnet synchronous motors and new trajectory‐oriented vector control, Part II
Author(s) -
Shinnaka Shinji
Publication year - 2009
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.20802
Subject(s) - universality (dynamical systems) , control theory (sociology) , vector control , trajectory , permanent magnet synchronous motor , computer science , matching (statistics) , control engineering , magnet , voltage , mathematics , engineering , control (management) , physics , artificial intelligence , induction motor , mechanical engineering , statistics , quantum mechanics , astronomy , electrical engineering
This paper presents a new unified analysis of estimate errors by model‐matching extended‐back‐EMF estimation methods for sensorless drive of permanent‐magnet synchronous motors. Analytical solutions for estimate errors, whose validity is confirmed by numerical experiments, are rich in universality and applicability. As an example of their universality and applicability, a new trajectory‐oriented vector control method is proposed, which can realize directly a quasi‐optimal strategy minimizing total losses with no additional computational loads by simply orienting one of the vector‐control coordinates to the associated quasi‐optimal trajectory. The coordinate orientation rule, which is analytically derived, is surprisingly simple. Consequently, the trajectory‐oriented vector control method can be applied to a number of conventional vector control systems using model‐matching extended‐back‐EMF estimation methods. © 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 168(1): 66–78, 2009; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20802