Strathprints logo
Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

A new soft-switching technique using a modified PWM scheme requiring no extra hardware

Tooth, D. and McNeill, N. and Finney, S.J. and Williams, B.W. (2001) A new soft-switching technique using a modified PWM scheme requiring no extra hardware. IEEE Transactions on Power Electronics, 16 (5). pp. 686-693. ISSN 0885-8993

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

A new soft-switching PWM scheme for a three-phase, AC-DC, step-down unity power factor converter is described. The main advantage of the scheme is that it requires no additional hardware components to achieve a combination of zero current and voltage turn-off and zero and reduced voltage turn-on. The scheme relies on the repositioning of the PWM pulses within the carrier period to obtain natural commutation from one switching device to the next. The theoretical reduction in the total switching losses is mathematically shown to be 42% compared with the standard center-aligned PWM scheme used with the converter. A PSpiceTM simulation of the new scheme reveals soft-switching waveforms. Practical results are given to support the simulation results and heat-sink temperature rise results show a reduction in heat-sink temperature rise for the new scheme compared to the old

Item type: Article
ID code: 3580
Keywords: AC-DC power convertors, PWM power convertors, SPICE commutation, switching circuits, power systems, Electrical engineering. Electronics Nuclear engineering, Electrical and Electronic Engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 12 Jun 2007
    Last modified: 04 Sep 2014 10:32
    URI: http://strathprints.strath.ac.uk/id/eprint/3580

    Actions (login required)

    View Item