DocumentCode :
2502839
Title :
A novel pulse shift modulation technique for controlling DC-DC converters
Author :
Agnihotri, Prashant ; Kaabouch, Naima ; Salehfar, Hossein ; Hu, Wen-Chen ; Upadhyay, Akhilesh
Author_Institution :
Univ. of Manitoba, Winnipeg, MB, Canada
fYear :
2010
fDate :
20-23 Dec. 2010
Firstpage :
1
Lastpage :
5
Abstract :
Pulse Width Modulation technique (PWM) and Pulse Frequency Modulation technique (PFM) are commonly used techniques to generate pulses to control switches in DC-DC converters. However, these techniques generate various losses as well as output fluctuations when used at wide load ranges. The conduction losses and output voltage ripples are dominant in PWM at high loads, and switching losses are dominant in PFM at low loads. Therefore, this paper proposes a novel modulation technique, which dynamically changes the duty cycle and frequency of the control pulse to control these switches in DC-DC converters. The results show that the proposed technique reduces the conduction losses and ripple voltage inherent in PWM and switching losses inherent in PFM, thus improves the efficiency of the converters at wide load ranges.
Keywords :
DC-DC power convertors; PWM power convertors; frequency control; pulse frequency modulation; switching convertors; DC-DC converter control; PFM; PWM; conduction losses; control pulse frequency; pulse frequency modulation technique; pulse shift modulation technique; pulse width modulation technique; switch control; switching losses; voltage ripples; Control systems; Converters; Electrical engineering; Pulse width modulation; Switching frequency; Switching loss; DC-DC converters; FPGA; Pulse Frequency Modulation; Pulse Width Modulation; VHDL;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Electronics, Drives and Energy Systems (PEDES) & 2010 Power India, 2010 Joint International Conference on
Conference_Location :
New Delhi
Print_ISBN :
978-1-4244-7782-1
Type :
conf
DOI :
10.1109/PEDES.2010.5712426
Filename :
5712426
Link To Document :
بازگشت