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Position sensorless control of IPMSMs based on a novel flux model suitable for maximum torque control
Author(s) -
Matsumoto Atsushi,
Hasegawa Masaru,
Matsui Keiju
Publication year - 2013
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.22380
Subject(s) - decoupling (probability) , control theory (sociology) , torque , ampere , inductance , position (finance) , direct torque control , vector control , computer science , control (management) , engineering , control engineering , physics , current (fluid) , induction motor , voltage , artificial intelligence , electrical engineering , finance , economics , thermodynamics
In this paper, a novel position sensorless control method for interior permanent magnet synchronous motors (IPMSMs) that is based on a novel ux model suitable for maximum torque control has been proposed. Maximum torque per ampere (MTPA) control is often utilized for driving IPMSMs with the maximum eciency. In order to implement this control, generally, the accurate motor parameters are required. However, the inductance varies dramatically because of magnetic saturation, which has been one of the most important problems in recent years. Therefore, the conventional MTPA control method fails to achieve maximum eciency for IPMSMs because of parameter mismatches. In this paper, rst, a novel ux model has been proposed for realizing the position sensorless control of IPMSMs, which is insensitive to L q . In addition, in this paper it is shown that the proposed ux model can approximately estimate the maximum torque control (MTC) frame, which is a new coordinate aligned with the current vector for MTPA control. Next, in this paper, a precise estimation method for the MTC frame has been proposed. By this method, highly accurate maximum torque control can be achieved. A decoupling control algorithm based on the proposed model is also addressed in this paper. Finally, some experimental results demonstrate the feasibility and eectiveness of the proposed method. © 2013 Wiley Periodicals, Inc. Electr Eng Jpn, 184(3): 55–66, 2013; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.22380