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A novel twelve-stator-pole, twenty-two-rotor-pole (12/22) outer-rotor permanent-magnet flux-switching (PMFS) machine for electric propulsion in a lightweight electric vehicle is presented. Analytical equations are derived for the dimensioning of a 3-phase 5kW in-wheel motor. Optimisation techniques are employed to maximise the performance of the machine. The validity of the analytical equations is...
High-torque and low-speed electrical drives are often employed for applications where mechanical gearing cannot be accommodated. On the other hand, permanent-magnet (PM) gear has drawn significant attention from both academies and industries due to the conspicuous merits, such as reduced acoustic noise, maintenance free, improved reliability, precise peak torque transmission capability, and inherent...
Initial position is one of the key points in the permanent magnet synchronous machine (PMSM) senseless control. This paper presents a neural network method with currents difference as its inputs and the rotor position angle as its outputs. 256 different 100mus-width voltage vector pulse pairs injects into stator before position calculation. The voltage vector direction distributes symmetrically around...
An alternative motor technology for electric drive-trains, in particular in use as an in-wheel drive, is presented. The technology is based on a simple double concentric stator structure with a 'yokeless' rotor, which enables the motor to develop constant power with an extended range much closer to zero speed. A distinct feature of the new motor, which is based on switched reluctance, rests on an...
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