Simplified Wide Speed-Range Sensorless Control Scheme for a Permanent Magnet Synchronous Machine

Conference: PCIM Europe 2018 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
06/05/2018 - 06/07/2018 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2018

Pages: 8Language: englishTyp: PDF

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Phung, Van Trang; Pacas, Mario (University of Siegen, Germany)

The present paper deals with a wide speed-range sensorless control for a permanent magnet synchronous machine (PMSM), where an enhanced voltage model and a signal injection technique are used to drive the machine at low- and high-speed regions, respectively. A combined angle observer is developed to obtain a smooth speed transition between the two-speed ranges. The main difference to the well-known methods is that the injection method uses a very simple algorithm based on a Fast-Fourier Transform for the extraction of the high-frequency (HF) component of the current. A phase-locked loop fed by this HF signal delivers the estimate of the rotor position.