An Air-Cooled YASA Motor for in-Wheel Electric Vehicle Applications
Autor: | Dave Winterborne, Nick Stannard, Lars E. Sjöberg, Glynn Atkinson |
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Rok vydání: | 2020 |
Předmět: |
business.product_category
Computer science Torque density 02 engineering and technology Thermal management of electronic devices and systems Heat sink 01 natural sciences Industrial and Manufacturing Engineering Automotive engineering law.invention Axial field law 0103 physical sciences Electric vehicle 0202 electrical engineering electronic engineering information engineering Torque Electrical and Electronic Engineering Power density Armature (electrical engineering) 010302 applied physics Computer cooling 020208 electrical & electronic engineering Axial length Control and Systems Engineering Heat transfer business |
Zdroj: | IEEE Transactions on Industry Applications. 56:6448-6455 |
ISSN: | 1939-9367 0093-9994 |
Popis: | In-wheel motors present a range of opportunities for innovation in electric vehicle design as the torque produced at each of two or four wheels can be controlled individually. A high-aspect ratio (large radius, short axial length) motor is required to fit within the wheel. Due to its location, liquid cooling of the in-wheel motor is difficult and undesirable, but a high power density is required to reduce the mass—which is particularly important as it is unsprung—and fit the space envelope. Furthermore, a high-torque density is required to eliminate the need for a gearbox. These constraints create a real challenge for the design of a machine for this application. An axial field machine using a yokeless and segmented armature (YASA) topology is designed to fit these requirements as such a machine has clear advantages when considering the high-aspect ratio. A soft magnetic composite material is utilized to carry the flux in its nonplanar path without incurring excessive losses or requiring a lamination design, which is difficult and expensive to manufacture. A novel cooling arrangement involving heat-spreading elements on each armature segment is employed to improve heat dissipation and, hence, power density. The design, analysis, manufacturing, and testing of the motor is described in this article to verify the concept against the requirements outlined earlier. |
Databáze: | OpenAIRE |
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