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Report of Lappeenranta city bus cycle: Lappeenranta Route 1
(Lappeenranta Univesity of Technology, 2013)
Replacing Copper with New Carbon Nanomaterials in Electrical Machine Windings
(Praise Worthy Prize, 2015)
Electrical machines have significant improvement potential. Nevertheless, the field is characterized by incremental innovations. Admittedly, steady improvement has been achieved, but no breakthrough development. Radical ...
Inductance Calculation of Tooth-Coil Permanent-Magnet Synchronous Machines
Analytical calculation methods for all the major components of the synchronous inductance of tooth-coil permanentmagnet synchronous machines are reevaluated in this paper. The inductance estimation is different in the ...
Design of a Traction Motor With Tooth-Coil Windings and Embedded Magnets
Traction motor design significantly differs from industrial machine design. The starting point is the load cycle instead of the steady-state rated operation point. The speed of the motor varies from zero to very high speeds. ...
Toward including the effect of manufacturing processes in the pre-estimated losses of the switched reluctance motor
The estimation of losses plays a key role in the process of building any electrical machine. How to estimate those losses while designing any machine; by obtaining the characteristic of the electrical steel from the catalogue ...
Heat-transfer improvements in an axial-flux permanent-magnet synchronous machine
(Pergamon Press, 2014)
Axial-flux machines tend to have cooling difficulties since it is difficult to arrange continuous heat path between the stator stack and the frame. One important reason for this is that no shrink fitting of the stator is ...
Investigation of a Direct Liquid Cooling System in a Permanent Magnet Synchronous Machine
A high demand for electrification of the transport sector has resulted in a need to provide compact and reliable electric power trains where the electric machine is a key element. The cooling system has a strong impact on ...
Direct Liquid Cooling Method Verified With a Permanent-Magnet Traction Motor in a Bus
Direct liquid cooling (DLC) of electrical machine windings is a clearly effectual cooling method for high-torque and high-power-density applications needed, especially, in heavy vehicles. Usually, in electric vehicles, the ...
Mitigating noncirculating bearing currents by a correct stator magnetic circuit and winding design
Different mechanisms by which bearing currents flow inside the electrical machine are well studied. In contrast, investigation and development of different techniques to mitigate these currents remain a field for improvement, ...
Analytical Evaluation of High-Efficiency Induction Motor Losses
An analytical motor design-based approach is used to evaluate the major loss components of a premium-efficiency (IE3)four-pole squirrel-cage induction machine. In the analytical approach, the geometry of the machine and ...