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Rotor flux and EEMF observer for interior permanent magnet synchronous machine

Vyas Deepak, Morawiec Marcin, Wachowiak Daniel

Bulletin of the Polish Academy of Sciences. Technical Sciences

2024

Vol. 72, nr 4

art. no. e150327

In recent years, the use of the interior permanent magnet synchronous machine (IPMSM) in various applications has grown significantly due to numerous benefits. Sensors are used to achieve high efficiency and good dynamic response in IPMSM drives but due to their high cost and reduced overall size of the system, sensorless control techniques are preferred. Non-sinusoidal distribution of rotor flux and slot harmonics are present in the considered IPMSM. In this article, these problems are considered control system disturbances. With the above-mentioned problems, the classical observer structure based on (d-q) fails to estimate at low-speed ranges. This article proposes an observer structure based on a rotor flux vector in (α-β) stationary reference frame, which works using the adaptive control law to estimate speed and position, and a non-adaptive EEMF-based observer to estimate speed and position. Moreover, a comparative analysis between both observer structures at different speed ranges is also considered in this article. The effectiveness of the observer structure is validated by simulation tests and experimental tests using the sensorless control system with a field-oriented control scheme for a 3.5 kW IPMSM drive system.

Finite element analysis and experimental tests of a permanent magnet synchronous machine for drive train application

Roumani K., Stephan W., Schmuelling B.

Przegląd Elektrotechniczny

2017

R. 93, nr 8

138--141

This paper deals with the design and tests of an internal permanent magnet synchronous machine with 12 slots and 10 poles. The machine is analysed under no load condition to estimate the flux linkage and the electromotive force as well as under load condition to calculate the iron core losses, the permanent magnet losses and the output power by utilizing the transient finite element analysis. Several simulation results under no load condition e.g. open circuit voltage and under load condition e.g. torque are compared with those of the experiment to validate the electromagnetic simulation model and to investigate the machine’s characteristics.

W artykule opisano projekt I badania silnika synchronicznego z magnesami trwałymi z 12 szczelinami I 10 biegunami. Silnik analizowano w stanie jałowym w celu określenia strumienia magnetycznego oraz pod obciążeniem w celu określenia strat i mocy wyjściowej. Przeprowadzono symulację I wyniki porównano z danymi eksperymentalnymi.