| 1. |
- Acquaviva, Alessandro, 1987
(författare)
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Analytical Electromagnetic Sizing of Inner Rotor Brushless PM Machines Based on Split Ratio Optimization
- 2018
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Ingår i: 2018 XIII International Conference on Electrical Machines (ICEM). - 2381-4802. - 9781538624777 ; , s. 576-582
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Konferensbidrag (refereegranskat)abstract
- This paper presents an analytical procedure to size brushless PM Machines from a set of required performance specifications. The sizing is obtained by optimizing the machine's split ratio, defined as the ratio of the stator inner to outer diameter. This ratio is key in the design of the machine and it is a compromise among several performance factors, and in particular it is shown to be a trade-off between efficiency and torque density. The split ratio also affects the volume of each material and in turn the cost of the machine. The algorithm outputs the machine performance and cost curves as a function of the split ratio, giving the possibility to the user to decide the best compromise for a certain application. The analytical sizing procedure is built and integrated with a 2D FEM simulator for refinement and verification of the design. A case study is presented and validated to prove the effectiveness of the sizing procedure.
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| 2. |
- Lundmark, Sonja, 1966, et al.
(författare)
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Coupled 3-D Thermal and Electromagnetic Modelling of a Liquid-cooled Transverse Flux Traction Motor
- 2018
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Ingår i: Proceedings - 2018 23rd International Conference on Electrical Machines, ICEM 2018. - 9781538624777 ; , s. 2640-2646
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Konferensbidrag (refereegranskat)abstract
- Modelling of electrical machines is constantly refined and it is now possible to couple CFD thermal models with FEM electromagnetic models, thereby considering the thermal effects on motor materials. Usually, the models are reduced as much as possible (i.e. 2-D instead of 3-D or using symmetry conditions) in order to reduce calculation time and computer resources. However, in this paper it is shown how to model an interior permanent magnet transverse flux (TF -IPM) motor in 3-D so to be able to include magnet, core and copper loss and the effect of air and liquid cooling. The simulation results are compared with results of a comparably sized liquid-cooled radial flux IPM (RF-IPM) motor. It is shown that the TF-motor cooling is very efficient due to the lack of end-windings.
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| 3. |
- Skoog, Stefan, 1985, et al.
(författare)
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Pole-Slot Selection Considerations for Double Layer Three-phase Tooth-Coil Wound Electrical Machines
- 2018
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Ingår i: 2018 XIII International Conference on Electrical Machines (ICEM). - 9781538624777 ; , s. 934-940
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Konferensbidrag (refereegranskat)abstract
- This work presents a combination of top-down and bottom-up design procedures to select a suitable pole-slot combination for a tooth-coil wound machine (TCWM), also known as non-overlapped fractional slot concentrated winding synchronous machine. Top-down features such as size and speed are determined by the intended application and affect the selection of slot and pole number. Bottom-up properties are quantified through key performance indicators (KPI) such as fundamental winding factor, periodicity, cogging multiplier and MMF harmonic leakage factor (HLF). Furthermore a compact and intuitive graphical way of presenting the properties of the double layer TCWMs is shown in this paper for slot number up to 39, highlighting the similarities among machines through the key winding factor concept. Analytical formulas for KPls are presented and the results are compared and visualized with FEM simulations.
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