Rotating Electrical Machines: Poynting Flow

Donaghy-Spargo, C.M.

Abstract

This paper presents a complementary approach to the traditional Lorentz and Faraday approaches that are typically adopted in the classroom when teaching the fundamentals of electrical machines - motors and generators. The approach adopted is based upon the Poynting Vector which illustrates the 'flow' of electromagnetic energy. It is shown through simple vector analysis that the energy-flux density flow approach can provide insight into the operation of electrical machines and it is also shown that the results are in agreement with conventional Maxwell Stress based theory. The advantage of this approach is its complementary completion of the physical picture regarding the electromechanical energy conversion process - it is also a means of maintaining student interest in this subject and as an unconventional application of the Poynting vector during normal study of electromagnetism.

Citation

Donaghy-Spargo, C. (2017). Rotating Electrical Machines: Poynting Flow. European Journal of Physics, 38(5), Article 055204. https://doi.org/10.1088/1361-6404/aa7dcc

• Journal Article Type: Article
• Acceptance Date: Jul 5, 2017
• Online Publication Date: Aug 14, 2017
• Publication Date: Sep 1, 2017
• Deposit Date: Jun 13, 2017
• Publicly Available Date: Aug 14, 2018
• Journal: European Journal of Physics
• Print ISSN: 0143-0807
• Electronic ISSN: 1361-6404
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 38
• Issue: 5
• Article Number: 055204
• DOI: https://doi.org/10.1088/1361-6404/aa7dcc
• Public URL: https://durham-repository.worktribe.com/output/1357470