Dynamic frequency scaling to improve converter efficiency

Author

Turner, Robert ; Duke, Richard ; Walton, Simon

Author_Institution

Dept. of Electron. & Comput. Eng., Univ. of Canterbury, Christchurch

fYear

2007

fDate

9-12 Dec. 2007

Firstpage

1

Lastpage

5

Abstract

A controller, suitable for medium to high power switching converters (1 kW to 1 MW), is proposed that dynamically changes the output PWM carrier frequency. The control objective is to optimise the choice of switching frequency so as to maximise overall converter efficiency, while providing a good transient performance. A range of control techniques which can determine when to change the PWM switching frequency are investigated. The practical limitations imposed by conventional PWM controllers and DSPs used in switching converter control are also considered.

Keywords

PWM power convertors; switching convertors; converter efficiency; dynamic frequency scaling; output PWM carrier frequency; power switching converters; switching converter control; Bandwidth; Digital control; Error correction; Frequency conversion; Pulse width modulation; Regulators; Sampling methods; Steady-state; Switching converters; Switching frequency; Converter Efficiency; Digital Controller; PWM;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Conference, 2007. AUPEC 2007. Australasian Universities

Conference_Location

Perth, WA

Print_ISBN

978-0-646-49488-3

Electronic_ISBN

978-0-646-49499-1

Type

conf

DOI

10.1109/AUPEC.2007.4548050

Filename

4548050