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http://dx.doi.org/10.6113/TKPE.2014.19.5.463

Maximum Torque Operating Strategy based on Stator Flux Analysis for Direct Torque and Flux Control of a SPMSM  

Kim, Sang-Hoon (Dept. of Electric & Electrical Engineering, Kangwon Nat'l Univ.)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.19, no.5, 2014 , pp. 463-469 More about this Journal
Abstract
This paper proposes a maximum torque operation strategy for the direct torque control of a surface-mounted permanent-magnet synchronous motor (SPMSM). The proposed method analyzes the available operation region of the stator flux of the SPMSM under voltage and current constraints. Based on this analysis, the optimal stator flux trajectory that yields the maximum torque is obtained across the entire operation region, including constant torque and constant power regions. The proposed strategy is also applicable in the flux-weakening region II operation of the SPMSM, which has no speed limit. The validity of the proposed method is verified through experiments conducted on an 800 W SPMSM drive system.
Keywords
SPMSM; Direct torque control; Optimal stator flux trajectory; Flux weakening region;
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