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In this paper, a rotor position estimation based on a low-resolution position sensor is proposed. As vector control of an ac permanent-magnet synchronous machine requires the rotor position with sufficiently high resolution, the low-resolution sensor signal is transformed into a spatially quantized rotating vector and based on this vector, a vector-tracking observer calculates the corresponding high-resolution...
This paper presents the results obtained from testing of a direct torque controlled (DTC) field excited synchronous motor. The results obtained from testing will be compared to their equivalents obtained from simulation of the machine model using finite element method (FEM) software.
The paper presents a model of a permanent magnet motor with M sets of three phase stator windings energized from DC-DC and DC-AC converters and regulated by a control subsystem of the marine propulsion drive. The model is built up by decomposing the system into subsystems / sub-circuits which are coupled together via dependent voltage/current sources. The model takes into account the non-sinusoidal...
This paper presents a novel method in which eddy current losses in a solid rotor direct torque controlled synchronous machine are found by utilizing a combination of analytical and FEM (finite element method) simulations. The method is presented along with the results obtained. The article also briefly presents a new method in which 3D (three dimensional) current flows can be modelled using a 2D (two...
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