Optimization of permanent magnet brushless machine for biomechanical energy harvesting applications

Author

Sayyah, Arash ; Davoudi, Ali ; Chapman, Patrick L.

Author_Institution

Univ. of Illinois at Urbana-Champaign, Urbana, IL, USA

fYear

2011

fDate

6-11 March 2011

Firstpage

1405

Lastpage

1409

Abstract

Cylindrical permanent magnet brushless machines are used in the biomechanical energy conversion device, mounted in a backpack, to harvest energy from center-of-mass motion during human walking. Optimization of motor constant, indicating torque efficiency, is studied. The optimal ratio of the stator bore diameter to the stator outer diameter, the so-called split ratio, is determined analytically to maximize the motor constant per-unit volume of the machine. The influence of winding disposition, tooth-tips and end-windings are taken into account appropriately. The optimization procedure is implemented using a 40 W brushless dc machine.

Keywords

brushless machines; energy harvesting; machine windings; optimisation; permanent magnet machines; biomechanical energy conversion device; biomechanical energy harvesting application; center-of-mass motion; cylindrical permanent magnet brushless machine optimization; power 40 W; split ratio; torque efficiency; winding disposition; Brushless DC motors; Permanent magnet motors; Stator windings; Windings;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2011 Twenty-Sixth Annual IEEE

Conference_Location

Fort Worth, TX

ISSN

1048-2334

Print_ISBN

978-1-4244-8084-5

Type

conf

DOI

10.1109/APEC.2011.5744776

Filename

5744776