A Comprehensive Loss Model and Comparison of AC and DC Boost Converters

Abstract

DC microgrids have become a prevalent topic in research in part due to the expected superior efficiency of DC/DC converters compared to their AC/DC counterparts. Although numerous side-by-side analyses have quantified the efficiency benefits of DC power distribution, these studies all modeled converter loss based on product data that varied in component quality and operating voltage. To establish a fair efficiency comparison, this work derives a formulaic loss model of a DC/DC and an AC/DC PFC boost converter. These converters are modeled with identical components and an equivalent input and output voltage. Simulated designs with real components show AC/DC boost converters between 100 W to 500 W having up to 2.5 times more loss than DC/DC boost converters. Although boost converters represent a fraction of electronics in buildings, these loss models can eventually work toward establishing a comprehensive model-based full-building analysis.

Energy and power quality measurement for electrical distribution in AC and DC microgrid buildings

“…Later works develop more sophisticated side-by-side comparison studies and often use simulation tools to incorporate wire loss, converter efficiency curves, battery charging algorithms, and annual load profiles [6][7][8][9]. Current research examines ways in which to further improve analyses [10][11][12], which may include creating a detailed model of losses within the power converters themselves [13].…”

Adaptive Charge-Compensation-Based Variable On-Time Control to Improve Input Current Distortion for CRM Boost PFC Converter

“…Power factor correction (PFC) is increasingly required in AC-DC converters to improve the total harmonics distortion (THD) and power factor (PF) [1][2][3][4]. As a classical choice, a boost PFC converter operating in the critical conduction mode (CRM) is preferred in medium-and low-power applications, owing to its simple control and high efficiency [5,6].…”