Refinement of Outer Rotor Permanent Magnet Flux Switching Machine for Downhole Application

Authors

  • Muhammad Fadhlan Hazim Khairul Fadzilah Universiti Tun Hussein Onn Malaysia
  • Erwan Sulaiman Universiti Tun Hussein Onn Malaysia

Keywords:

PMFSM, Downhole motor, Outer rotor, Deterministic optimization, Torque enhancement, High-temperature, High-pressure, JMAG

Abstract

Electric machinery in downhole oilfield environments endure severe high-pressure, high-temperature (HPHT) conditions. This study examines a 12-slot/22-pole outer rotor Permanent Magnet Flux Switching Machine (PMFSM) optimized for these applications. JMAG Designer software was employed to model and simulate diverse combinations. A deterministic optimization method was utilized to enhance the design parameters, including rotor geometry, permanent magnet size, and coil turn quantity. The optimized model demonstrated a 102.6% augmentation in torque (from 16.58 Nm to 33.57 Nm), a diminution in cogging torque (from 3.2 Nm to 1.76 Nm), and a 37.3% reduction in magnet weight. These improvements validate the suitability of outer rotor PMFSMs for efficient and reliable downhole operations.

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Published

28-10-2025

Issue

Vol. 6 No. 2 (2025): EEEE

Section

Electrical and Power Electronics

How to Cite

Khairul Fadzilah, M. F. H., & Sulaiman, E. (2025). Refinement of Outer Rotor Permanent Magnet Flux Switching Machine for Downhole Application. Evolution in Electrical and Electronic Engineering, 6(2), 255-262. https://publisher.uthm.edu.my/periodicals/index.php/eeee/article/view/21100