6 kW Axial Flux Motor Based on Soft Magnetic Composites for Hand Held Power Tools

Cristofaro Pompermaier
Primary Concept and Features Electric, Husqvarna Group

Abstract

The supremacy of radial flux motors is ubiquitous and there are several reasons for that. As most of motors are made from thin laminations, radial motors are the natural choice due to the simplicity and performance. A study has been performed with the help of JMAG and its 3D capabilities to evaluate an Axial Flux Motor (AFM) made of Soft Magnetic Composites (SMC). The motor consists of 12 slots, 14 poles with a rated output power of 6 kW. Husqvarna Construction division has a motor named Prime which is used in several products like Drill Machine, Power Cutter, Wall Saw among others. The efficiency, weight and reliability are crucial for these professional tools. Power dense motors are achieved by usage of external cooling fluid as water and internal cooling as oil for heat transfer/distribution. The analysis and results are fully automated by scripts in Microsoft Excel, SolidWorks and JMAG. The proposed AFM should provide the desired performance with a simple and intuitive assembly process.

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