Title :
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
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;
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2011 Twenty-Sixth Annual IEEE
Conference_Location :
Fort Worth, TX
Print_ISBN :
978-1-4244-8084-5
DOI :
10.1109/APEC.2011.5744776
