A model to estimate the effect of DC bus voltage on HEV powertrain efficiency

Document Type

Conference Proceeding

Publication Date


Publication Title

Vehicle Power and Propulsion Conference (VPPC), 2010 IEEE

Conference Name

Vehicle Power and Propulsion Conference (VPPC)


The efficiency of the electric drive system in a Hybrid Electric Vehicle plays a significant role in overall hybrid propulsion system efficiency and influences design choices for other mechanical components in the system. Increasing the DC bus voltage is thought to improve overall powertrain efficiency. In this paper, models are developed to predict the effect of DC bus voltage on the power loss in a PWM inverter motor drive and a brushless DC electric machine. The models indicate that a higher bus voltage will improve powertrain efficiency in some, but not all, operating conditions.

Rights Statement

© 2010 IEEE (Electrical and Electronics Engineers), all rights reserved.