alexa Electrical Engineering

OMICS International organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Electrical Engineering

Controlling DC-DC Converters in Portable Devices: A Dynamic FPGABased Pulse Shift Modulation Technique

In portable devices, conventional modulation techniques, such as Pulse Width Modulation (PWM) and Pulse Frequency Modulation (PFM), have been proposed and used to control switches in DC-DC converters. These techniques are not efficient at wide load ranges and lead to converters that suffer from high conduction losses, switching losses, and ripple voltages. This paper proposes a novel modulation technique that increases the efficiency of DC-DC converters by reducing these losses and ripple voltages. The technique, Pulse Shift Modulation (PSM), dynamically changes the duty cycle and the switching frequency of the control signal with any change in load conditions. The proposed modulation technique produces lower losses and ripple voltages compared to those found in converters controlled by conventional techniques. Further, the proposed technique is implemented in a Field Programmable Gate Array (FPGA) device, which is faster and cheaper and consumes less power than processor-based implementations do. READ

 
  • Share this page
  • Facebook
  • Twitter
  • LinkedIn
  • Google+
  • Pinterest
  • Blogger