Abstract
An improved estimation scheme for disturbance due to the dead time and inverter nonlinearity in an inverter-fed permanent magnet synchronous motor (PMSM) drive is presented. The proposed scheme is based on a signal processing and harmonic component extraction and does not require any additional circuits nor parameter information. Furthermore, it is faster to estimate the disturbance as compared with the conventional method based on harmonic analysis. The effectiveness of the proposed scheme is verified through comparative simulations.
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