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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...
Park equations in a rotor reference frame are used for sinusoidal back-electromotive force (EMF) permanent magnet synchronous machines (PMSMs) to eliminate the rotor-position dependency and create time-invariant model. However, Park equations are not suitable for non-sinusoidal back EMF cases. Instead, multiple reference frames are considered individually for each harmonic, with their rotation speed...
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...
The focus of this paper is to improve self-sensing performance of interior permanent magnet synchronous machine (IPMSM) by modifying rotor configurations. Field intensified IPMSM (FIIPMSM) is designed by adding flux barriers in the rotor of an IPMSM. In comparison with IPMSMs, FIIPMSMs have the advantage of decoupling saturation-induced saliency, cross-coupling effects and also secondary saliencies,...
This paper analyzes effects of magnetic saturation, including cross-saturation and secondary saliencies, on saliency- based sensorless control of interior PM synchronous machines. These effects are mitigated by adaptively decoupling saturation induced-saliencies via a structured neural network. The paper includes identification of the dominant, saturation-induced components of the carrier signal current...
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