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This paper presents a technique to reduce electromagnetic torque ripple of an IPMSG with fractional-slot, concentrated-winding which is connected to a rectifier and a boost converter. Firstly, the generator was controlled using DC current control of the boost converter. The generator torque ripple with this conventional method was found as 29.7% of rated torque which is significant to cause generator...
The standard dq model of interior permanent magnet machines is based on the assumption of sinusoidal machine parameters. This assumption is flawed especially when a fractional-slot concentrated-wound stator is utilized. In order to address this deficiency, in this paper the non-sinusoidal machine parameters are modelled in the abc-system. An extended dq-model is then proposed based on the derived...
A new control approach for maximum torque per ampere control is proposed to improve the efficiency of fractional slot concentrated wound interior permanent magnet synchronous generators under light load conditions. The proposed method is compared with existing current reference trajectories (id zero, conventional maximum torque per ampere and total loss minimization) by experimentally measuring the...
The Fractional Slot Concentrated Winding (FSCW) configuration increases spatial harmonics of the magneto motive force (MMF) waveform of an electric machine. Therefore, saturation level in such machines is typically higher than that of the conventional machines with distributed windings. Since the characteristic of Interior Permanent Magnet (IPM) machine principally depends on inductances variation,...
An analytical modelling technique to calculate the generated magneto-motive force (MMF) and back-EMF of fractional slot concentrated wound (FSCW) permanent magnet synchronous machines (PMSMs) is reported. The generated MMF of a FSCW stator is analyzed and modelled using a Fourier series technique. General expressions of the harmonic winding factors for FCSW stators with different slot-pole combinations...
This paper analyzes the performance of a new fractional-slot, concentrated-winding (FSCW) Interior Permanent Magnet Synchronous Machines (IPMSM) under Field Oriented Control (FOC). The FSCW IPMSM is being developed vigorously in recent years because of its high-power density, high efficiency, wide field-weakening capability, and high fault tolerance compared to the distributed-wound IPMSMs. The major...
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