Open loop low speed control for PMSM in high dynamic applications
Author
Busca, Cristian
Term
4. term
Education
Publication year
2010
Submitted on
2010-06-02
Pages
111
Abstract
Sensorløs motorstyring betyder, at motoren styres uden fysiske positionssensorer, hvilket kan reducere omkostninger og kompleksitet. Dette projekt fokuserer på sensorløs styring af en overflademonteret permanentmagnet-synkronmotor (SMPMSM) ved lave hastigheder i høj-dynamiske applikationer. Først gennemgås litteraturen for at vælge en egnet sensorløs strategi, som derefter implementeres i MATLAB/Simulink og PLECS og testes i simuleringer. Den samme strategi valideres på et dSPACE laboratoriesetup. For at sammenligne retfærdigt testes både sensoret og sensorløs styring af SMPMSM’en, og en belastningsmaskine styres for at kunne påføre kendte momenter. Ydelsen vurderes på tværs af fem casestudier. Resultaterne i laboratoriet er lovende ved nul og lave hastigheder; fejl i estimering af rotorpositionen stiger med lastmoment og hastighed. Der opnås gode resultater op til 200 o/min.
Sensor-less motor control operates motors without physical position sensors, which can reduce cost and complexity. This project focuses on sensor-less control of a surface-mounted permanent magnet synchronous motor (SMPMSM) at low speeds in high-dynamic applications. We first reviewed the literature to select a suitable sensor-less strategy, then implemented it in MATLAB/Simulink and PLECS and evaluated it in simulations. The same strategy was validated on a dSPACE laboratory setup. To enable a fair comparison, both sensored and sensor-less control of the SMPMSM were tested, and a loading machine was controlled to apply known torques. Performance was assessed across five study cases. Laboratory results are promising at zero and low speeds; rotor position estimation error increases with load torque and speed. Good results were obtained up to 200 rpm.
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