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This paper presents a Space-Vector Modulated (SVM) Direct-Torque-Control (DTC) scheme for a direct-drive permanent magnet synchronous generator (PMSG) and a gird converter for wind energy without any position sensor. Direct control of the rotating velocity and amplitude of the stator flux vector allows very fast torque response of the PMSG according to the generator speed. Fixed switching frequency...
The paper presents a direct-torque-control scheme for a direct drive variable-speed permanent magnet synchronous generator (PMSG) for wind energy without any position sensor. Direct control of the rotating velocity and amplitude of the stator flux vector allows very fast torque response of PMSG according to the generator speed. Fixed switching frequency and very low torque ripple are obtained with...
The accuracy of the open-loop estimation of the stator flux and speed for direct torque controlled (DTC) IPM synchronous motor drives drops as the mechanical speed reduces. At lower speed, inaccurately estimated stator flux and stator resistance mismatch have significant influence on the steady state and transient performance of the drive system. The robustness against parameter detuning and signal...
This work focuses on performance improvements of the stator flux estimation for a direct torque controlled interior permanent magnet (IPM) synchronous motor drive. In this paper, an adaptive sliding observer is presented to estimate the stator flux linkage based on the motor current model. The observer has better dynamic behavior, disturbance resistance and high accuracy estimation ability. The experimental...
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