Date of Graduation

5-2014

Document Type

Thesis

Degree Name

Bachelor of Science in Electrical Engineering

Degree Level

Undergraduate

Department

Electrical Engineering

Advisor

McCann, Roy A.

Abstract

Using pulse-width modulation (PWM) to control switching converters such as a dual active bridge introduces latency into a system [1]. Latency in a switching converter decreases the effective bandwidth that the converter can be switched at and for the case of a closed loop control system decreases the effective closed loop system stability. This delay can be attributed to sampling of the control signal and calculation time for the PWM. If a prediction scheme is implemented in this calculation, the next switching time could be predicted to remove any latency. There are effectively two steps in order to achieve this prediction: 1.) analog to digital conversion of the control signal; 2.) prediction of next point of interest in the control signal [1]. In this paper, several different methods of prediction are compared in order to determine the relative effectiveness of different prediction techniques. Prediction of future data points of the control signal can reduce latency in PWM creation and thereby improve the stability and/or control bandwidth of the system.

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