Impact of Slim DC Capacitance on Floating Capacitor H-bridge Motor Drive

Leng, S. and Muyeen, S. and Al-Durra, A. and Blaabjerg, F. 2018. Impact of Slim DC Capacitance on Floating Capacitor H-bridge Motor Drive. IEEE Transactions on Power Electronics. 33 (4): pp. 3302-3314.

Source Title

IEEE Transactions on Power Electronics

DOI

10.1109/TPEL.2017.2710882

ISSN

0885-8993

School

School of Electrical Engineering, Computing and Mathematical Science (EECMS)

Remarks

© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

URI

http://hdl.handle.net/20.500.11937/67746

Collection

Curtin Research Publications

Abstract

This paper discusses the impact of small dc capacitance in a motor drive using a floating capacitor H-bridge topology. The proposed topology is intended for applications where variable frequency control is not required. Special attention is paid on investigating the second-order dc capacitor voltage ripples, whose influence on the induction motor as well as on the motor drive itself is of importance. This issue is addressed in this paper through rigorous mathematical formulations. It is found that by inverting the second-order dc ripple voltage using the conventional SVPWM, no harmful harmonics will be generated in the motor line voltage. This demonstrates the possibility of drastically reducing the dc capacitance of the proposed system. Induction motor as well as H-bridge performance with respect to different dc capacitance values is demonstrated by experiments, which lays the foundation for cost reduction and reliability enhancement of the proposed system.