A New Harmonic Current Injection Technique to Reduce Cogging Torque in Axial Flux Permanent Magnet Motors

Girgin M. T., Guven M. K., Aydin M.

IEEE TRANSACTIONS ON MAGNETICS, vol.58, no.2, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 58 Issue: 2
  • Publication Date: 2022
  • Doi Number: 10.1109/tmag.2021.3087460
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Business Source Elite, Business Source Premier, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: Torque, Forging, Harmonic analysis, Permanent magnet motors, Reluctance motors, Torque measurement, Rotors, Axial flux permanent magnet (AFPM) motor, cogging torque, harmonic current injection, servo motor drives, RIPPLE, MINIMIZATION
  • Kocaeli University Affiliated: Yes


In this article, a new two-stage harmonic current injection (TSHCI) technique is proposed for permanent magnet (PM) synchronous machines to reduce the cogging torque and torque ripple components at low speeds. The developed algorithm is validated for two different axial flux PM (AFPM) motors experimentally. It has been shown that the proposed technique help reduce the cogging components of axial gap disk motors significantly especially at very low speeds.