On field weakening performance of a brushless direct current motor with higher winding inductance: Why does design matter?

Ozgur Ustun, Omer Cihan Kivanc*, Seray Senol, Bekir Fincan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

This paper comprises the design, analysis, experimental verification and field weakening performance study of a brushless direct current (BLDC) motor for a light electric vehicle. The main objective is to design a BLDC motor having a higher value d-axis inductance, which implies an improved performance of field weakening and a higher constant power speed ratio (CPSR) operation. Field weakening operation of surface-mounted permanent magnet (SMPM) BLDC motors requires a large d-axis inductance, which is characteristically low for those motors due to large air gap and PM features. The design phases of the sub-fractional slot-concentrated winding structure with unequal tooth widths include the motivation and the computer aided study which is based on Finite Element Analysis using ANSYS Maxwell. A 24/20 slot–pole SMPM BLDC motor is chosen for prototyping. The designed motor is manufactured and performed at different phase-advanced currents in the field weakening region controlled by a TMS320F28335 digital signal processor. As a result of the experimental work, the feasibility and effectiveness of field weakening for BLDC motors are discussed thoroughly and the contribution of higher winding inductance is verified.

Original languageEnglish
Article number3119
JournalEnergies
Volume11
Issue number11
DOIs
Publication statusPublished - Nov 2018

Bibliographical note

Publisher Copyright:
© 2018 by the authors.

Keywords

  • Brushless dc motor
  • Field weakening
  • Periodic timer interrupt
  • Phase-advanced method
  • Sub-fractional slot-concentrated winding
  • Winding inductance

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