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http://dx.doi.org/10.6113/TKPE.2011.16.4.374

Initial Rotor Position Estimation for an Interior Permanent-Magnet Synchronous Motor using Inductance Saturation  

Park, Nae-Chun (강원대 대학원 전기전자공학부)
Lee, Yoon-Kyu (현대엘리베이터 기술연구소)
Kim, Sang-Hoon (강원대 전기전자공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.16, no.4, 2011 , pp. 374-381 More about this Journal
Abstract
This paper proposes a new method to acquire an initial rotor position for IPMSM(Interior Permanent Magnet Synchronous Motor) without a position sensor at standstill. The proposed method is based on the variation of inductance caused by the magnetic saturation of stator core. Minimum number of voltage vectors are chosen to determine the initial rotor position. By using the resultant currents in combination with the inductance variation, the north pole and the absolute position of the rotor can be easily obtained. This method also has the advantage of not requiring motor parameters and additional hardware. Its validity is verified by experiments.
Keywords
IPMSM; Initial Rotor position; Magnetic saturation; Voltage vector;
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