The article presents the analysis of operational parameters and thermal analysis of the wheel hub motor during operation in the car drive. The authors proposed an analysis of the operation of the wheel hub motor mounted in a hybrid car, during Artemis driving cycles and while driving on the road with different slopes. The simulations were carried out in the Ansys Motor-CAD program. The calculations are based on coupled models of the electromagnetic circuit and thermal models of the motor. The conducted research is a proposal of an approach to the design of electric vehicle propulsion motors, which allows us to consider problems related to predicting at the motor design stage what are its possibilities and what risks during operation in a real drive. The analysis also includes the impact of the applied motor control strategy and the variation of the supply voltage. These are aspects that are extremely important in wheel hub motors, as they are weight-optimized motors with a limited volume and a relatively high power and torque density.

The paper presents the results of numerical calculations and experimental tests on reducing eddy current losses in permanent magnets by means of segmentation in a high-power fractional slot PMSM. This type of motor allows for obtaining a high value of specific power (kW/kg), but at the same time they are characterized by the problem of eddy current losses in rotor elements. Thus designed and manufactured model of motor, which is the subject of this work, has a maximum power of 50 kW (at 4800 rpm) and a mass of 10.5 kg. Reducing eddy current losses by segmentation of permanent magnets is a well-known and widely described method, but there is a lack of papers showing the results of experimental studies, in particular of high-power density motors. This article presents results of the effectiveness of reducing eddy current losses for several variants of axial and circumferential segmentation. The results of experimental studies were verified and compared with the results of numerical calculations performed in the ANSYS Motor-CAD software.

The publication presents a comparison of the effectiveness of reducing eddy current losses by segmentation of permanent magnets and Snakeline Magnet Technology. The object of the research is the Fractional Slot PMSM motor with a maximum power of 50 kW (@ 4800 rpm) and a mass of 10.5 kg. In this type of motors, due to the higher harmonics of the MMF force distribution, the phenomenon of eddy current losses in the rotor elements, including permanent magnets, cannot be omitted. This paper presents a comparison of the results of laboratory tests and numerical simulations for several variants of permanent magnet segmentation and Snakeline Magnet Technology. The experimental results were compared with the results of numerical calculations on 2D and 3D models.

The publication presents two innovative solutions of drive systems recently developed at the Łukasiewicz – Upper Silesian Institute of Technology, Center of Electric Drives and Machines. The first one is an integrated drive unit with a power of 21 kW, dedicated to floating vessels, in particular houseboats. The drive is characterized by a compact design and high energy efficiency. The second solution is a LEMoK 300 motor with a maximum power of 90 kW, dedicated to small aircraft. The motor only weighs 18 kg and has very high power density, which allowed its direct use in a prototype hybrid aircraft. Both solutions were developed in cooperation and at the request of business partners, i.e. Sun Yacht – Boating Holidays and Artus Aircraft. The paper presents the primary operational characteristics and data of the design solutions developed by the Authors.