[Oral Presentation]Influence of Keybar-slot on Torque Characteristics of Direct-Drive Permanent-Magnet Brushless Machines

Influence of Keybar-slot on Torque Characteristics of Direct-Drive Permanent-Magnet Brushless Machines

ID：179 View Protection：ATTENDEE Updated Time：2022-11-02 17:38:41 Hits：313 Oral Presentation

Start Time：2022-11-04 17:00 （Asia/Shanghai）

Duration：20min

Session：[M] Electric Machine Design and Control » [OS14] Oral Session 14

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Abstract

The keybar-slots are inevitable and necessary for the installation of torque motor used for CMG (Control moment gyro) for the satellite This paper investigates the influence of keybar-slot on torque characteristics of direct-drive permanent-magnet brushless DC (PM BLDC) motor. The model and specification are illustrated. Then the keybar-slot effects on torque characteristics are analyzed through finite element analysis (FEA). It shows that high localized magnetic saturation due to stator asymmetry can significantly increase cogging torque and torque ripple. An effective method has been proposed to improve the asymmetry by applying five uniformed distributed keybar-slots in the stator yoke.

Keywords

Speaker

Wenqi Fu

Engineer Beijing Institute of Aerospace Control Devices

Wenqi Fu received the B.E. degree in automation from the North China University of Technology, Beijing, China, in 2018, and the M. Sc degree in Control Engineering from the School of Automation, Beijing Institute of Technology, Beijing. She is currently an engineer in Beijing Institute of Aerospce Control Devices, Beijing, China. Her research interests include modeling and design of PM machines and new permanent magnet motor systems.