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http://dx.doi.org/10.6113/TKPE.2015.20.5.402

A Novel Rotor Position Error Calculation Method using a Rotation Matrix for a Switching Frequency Signal Injected Sensorless Control in IPMSM  

Kim, Sang-Il (Dept. of Electrical Eng., EECS Lab., Hanyang University)
Kim, Rae-Young (Dept. of Electrical and Biomedical Eng., Hanyang Univeristy)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.20, no.5, 2015 , pp. 402-409 More about this Journal
Abstract
This paper proposes a novel rotor position error calculation method for high-frequency signal-injected sensorless control. The rotor position error using the conventional modulation method can be only measured up to ${\pm}45^{\circ}$. In addition, when the rotor position estimation error is not sufficiently small, the small angle approximation in no longer valid. To overcome these problems, this study introduces a new rotor position error calculation method using the rotating matrix. In this study, the position error measurement range of the proposed method is extended from ${\pm}45^{\circ}$ to ${\pm}90^{\circ}$. The linearity between the real rotor position error and the estimated error is maintained by nearly $90^{\circ}$. These features of the proposed method improve the performance of the sensorless control. The validity of the proposed method is verified by simulations and experiments.
Keywords
Sensor-less control; IPMSM(Interior Permanent Magnet Synchronous Machine); Signal injection; Rotation matrix;
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