A FEM Analysis of BLDC Ceiling Fan with Different Slot-Pole Combinations

Usman Haider; Nazam Siddique; Muhammad Rashid; Sajjad Miran; Muhammad Wasif; Jehanzeb Irshad

Authors

Usman Haider Department of RND, Champion Fans, Gujranwala, Pakistan
Nazam Siddique Department of Electrical Engineering, University of Gujrat, Pakistan
Muhammad Rashid Department of Electrical Engineering, The University of Lahore, Pakistan
Sajjad Miran Department of Mechanical Engineering, University of Gujrat, Pakistan
Muhammad Wasif Department of Electrical Engineering, University of Gujrat, Pakistan
Jehanzeb Irshad Department of Electrical Engineering, University of Gujrat, Gujrat, Pakistan

Keywords:

Brushless DC (BLDC) Motor, Ansys Maxwell Rmxprt, Ceiling Fans, Slot to Pole Combination, Finite Element Analysis

Abstract

BLDC motors have recently made significant advancements in the automation industry. Due to their high efficiency and power density, they are widely used in everyday applications such as fans, electric bikes, rail transit, and automobiles. The slot-pole structure is a key factor influencing motor design. This research explores various slot-pole combinations to enhance performance.

For ceiling fan applications, a balanced and highly efficient stator with concentrated winding has been designed based on different slot-pole configurations. Two commonly used combinations—18-slot/16-pole and 12-slot/14-pole—were analyzed. However, these configurations result in high cogging torque and a low winding factor, reducing the efficiency of BLDC ceiling fans.

To overcome these issues, a 24-slot/22-pole combination is proposed. This design improves torque production, power efficiency, and magnetic flux density while reducing cogging torque and increasing cogging frequency. The effectiveness of this structure is evaluated using the finite element method (FEM) in Ansys Electronics Desktop software

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