Design considerations in an indirectly coupled multilevel motor controller


Autoria(s): Pierce, Jordan; Walker, Geoff; Finn, David; Sernia, Paul
Data(s)

2004

Resumo

Permanent magnet (PM) motors utilising ironless stator structures have been incorporated into a wide variety of applications where high efficiency and stringent torque control are required. With recent developments in magnetic materials, improved design strategies, and power outputs of up to 40kW, PM motors have become an attractive candidate for traction drives in electric and hybrid electric vehicles. However, due to their large air gaps and ironless stators these motors can have inductances as low as 2μH, imposing increased requirements on the converter to minimise current ripple. Multilevel converters with n cells can effectively increase the motor inductance by a factor of n2 and are an excellent approach to minimise the motor ripple current. Furthermore by indirectly coupling the outputs of each cell, improvements in converter input and cell ripple current can also be realised. This paper examines the issues in designing a high current indirectly coupled multilevel motor controller for an ironless BLDC traction drive and highlights the limitations of the common ladder core structure.

Formato

application/pdf

Identificador

http://eprints.qut.edu.au/63561/

Publicador

AUPEC

Relação

http://eprints.qut.edu.au/63561/1/PaperID165_pierce.pdf

Pierce, Jordan, Walker, Geoff, Finn, David, & Sernia, Paul (2004) Design considerations in an indirectly coupled multilevel motor controller. In Australasian Universities Power Engineering Conference (AUPEC 2004), 26-29 September 2004, University of Queensland, Brisbane, Australia.

Direitos

Copyright 2004 [please consult the authors]

Fonte

School of Electrical Engineering & Computer Science; Science & Engineering Faculty

Tipo

Conference Paper