Ultra-High-Speed Motor With Enhanced Cooling for Cordless Vacuum Cleaners

Dianov, Anton, Woo, Hyeon-Myeong, Sun, Xiaodong, Yan, Rui, Xiang, Jiawei and Vagapov, Yuriy (2025) Ultra-High-Speed Motor With Enhanced Cooling for Cordless Vacuum Cleaners. IEEE Transactions on Industry Applications. ISSN 1939-9367

Text WURO_05_Ultra-high-speed motor with enhanced cooling.pdf - Accepted Version Available under License Creative Commons Attribution. Download (1MB)

Abstract

Recent advancements in battery materials have significantly improved their charge-to-weight ratio providing fast progress in battery-dependent technologies and expanding the market for cordless devices in particular. Cordless vacuum cleaners have become especially popular due to enhanced convenience compared to wired models. This growing demand has boosted research activity toward further size and weight reduction. As a result, motors and impellers have been considerably scaled down to just a few centimeters in diameter, while the operating frequency of ac voltage applied to energize the motors is now increased to exceed 2 kHz. However, the reduced size and mass of the motor metal components have negatively affected cooling efficiency, making heat dissipation a major challenge in the development of compact, high-speed motors. To overcome this thermal issue, this paper proposes a novel motor design having a six-pointed star-shaped stator with toroidal windings placed at its vertices. This configuration increases the stator surface area ensuring the improvement of the heat dissipation. Moreover, the enlarged spacing between windings improves cooling conditions allowing the motor to conduct higher current through the stator windings without overheating. A working prototype of the proposed motor was developed and tested to evaluate its performance and thermal characteristics. An experiment-based comparative analysis with commercial vacuum cleaner motors showed that the prototype outperformed them in both operational and thermal parameters confirming the effectiveness of the proposed concept.

Item Type:	Article
Keywords:	Motors , Stator windings , Cooling , Heat transfer , Heating systems , Iron , Windings , Impellers , Temperature dependence , Motor drives, High speed motors , Permanent magnet motors , Brushless machines , Stators , Energy effic
Depositing User:	Hayley Dennis
Date Deposited:	02 Mar 2026 14:20
Last Modified:	03 Mar 2026 02:12
URI:	https://wrexham.repository.guildhe.ac.uk/id/eprint/18410

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