Selaus tekijän mukaan kokoelmassa "Lindh, Pia"Tieteelliset julkaisut
Aineistot 1-20 / 21
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Analytical Evaluation of High-Efficiency Induction Motor Losses
(IEEE, 05.08.2019)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 ... -
Comparison of Commercial and Open-Source FEM Software: A Case Study
(IEEE, 11.08.2020)5 kW high-efficiency induction motor is analyzed using 2D open-source platform and the results are compared with commercial software and measurements. The importance of equivalent circuit parameters in 2D analyses is ... -
Comparison of Synchronous Reluctance Motors and Permanent Magnet Synchronous Motors with Direct Liquid Cooling Arrangement
(IEEE, 06.09.2023)A comparison of Synchronous Reluctance Motors and Permanent Magnet Synchronous Motors with a Direct Liquid Cooling system is given. Both solutions have been analyzed, designed, and optimized considering the same constraints ... -
Cost Minimization of a Permanent Magnet Eddy Current Brake by Multiobjective Particle Swarm Optimization Based on Nonlinear Reluctance Network Modeling
(IEEE, 22.11.2021)Design optimization of a permanent magnet eddy current brake (PM-ECB) is performed by applying multiobjective particle swarm optimization (MO-PSO) for cost minimization. A previously designed and patented PM-ECB is used ... -
Design of a Traction Motor With Tooth-Coil Windings and Embedded Magnets
(IEEE, 2014)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. ... -
Direct Liquid Cooling Method Verified With a Permanent-Magnet Traction Motor in a Bus
(IEEE, 01.04.2019)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 ... -
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 ... -
Inductance Calculation of Tooth-Coil Permanent-Magnet Synchronous Machines
(IEEE, 2014)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 ... -
Investigation of a Direct Liquid Cooling System in a Permanent Magnet Synchronous Machine
(IEEE, 08.10.2019)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 ... -
Loadability of Converter-fed Induction Machine
(IEEE, 02.10.2023)The main dimensioning principle of an electrical machine is the temperature rise that is directly related to losses of the machine. When PWM–supply is used, an additional high frequency switching frequency dependent loss ... -
Magneto-Thermal Analysis of an Axial-Flux Permanent-Magnet-Assisted Eddy-Current Brake at High-Temperature Working Conditions
(IEEE, 07.05.2020)This paper proposes an analytic coupled magneto-thermal analysis of an axial-flux (AF) permanent-magnet-assisted (PMA) eddy-current brake (ECB) at high-temperature working conditions. In the topology investigated, permanent ... -
Method to define induction machine efficiency map with two input parameters
Proceedings (International Conference on Electrical Machines) (IEEE, 13.10.2022)Efficiency maps of each component are often required in system simulations. One method to produce efficiency maps for induction motors is presented here. Electric motors efficiency calculations require several input ... -
Mitigating noncirculating bearing currents by a correct stator magnetic circuit and winding design
(IEEE, 06.04.2020)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, ... -
Mitigation of inverter-induced noncirculating bearing currents by introducing grounded electrodes into stator slot openings
(IEEE, 23.12.2020)Modern converter-supplied AC motors are exposed to bearing currents. Despite extensive research and development, the industry still does not have a final solution with acceptable cost and high efficiency. This paper focuses ... -
Model for Nonlinear Electric Field Control in End-Winding Region of an Electrical Machine
Proceedings (International Conference on Electrical Machines) (IEEE, 13.10.2022)The electric potential at the surface of a stress grading system (SGS) of an electrical machine is estimated analytically by means of a new one-dimensional model approach. The analytical tool is presented for electric field ... -
On the application of extended grounded slot electrodes to reduce non-circulating bearing currents
(IEEE, 11.05.2022)Power-electronic-Inverterconverter-induced motor bearing currents are a widespread problem in the field of electrical drives. Parasitic capacitances between the electrical machines parts provide a path for leakage currents, ... -
Parameter Selection Guidelines for Direct-on-Line Permanent Magnet Generators Contemplating Fault-Ride-Through Capability
(IEEE, 01.12.2022)Direct-on-line (DOL) driven permanent-magnet generators (PMSGs) are often applied in small-scale hydropower plants (< 10 MW). The Commission Regulation (EU) 2016/631 defines the boundary conditions to operate these generators ... -
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 ... -
Simulation tool for dimensioning power train of hybrid working machine
(Norwegian Society of Automatic Control, 16.12.2021)The tightening of emission standards and related regulations leads to the necessity of the hybridization of mobile machines. The working operation profile of non-road machinery differs for diverse application types and ... -
Thermal Management of an Electric Motor with Novel Materials
Proceedings (International Conference on Electrical Machines) (IEEE, 13.10.2022)A considerable improvement in the performance of electrical machines can be achieved via advances in motor thermal management. Emerging materials for electrical insulation and cooling systems of a motor demonstrate enhanced ...
