Abstract
Series hybrid electric systems are thought to be suitable power systems for motor vehicles in urban traffic. It is important for this system to improve the comprehensive energy efficiency when components are combined, and to evaluate it appropriately. In this report, the technique to grasp energy loss in detail that occurs when electric power flows complicatedly in the series hybrid power system has been examined. And, the energy efficiency of the series hybrid power system on urban driving has also been evaluated for a trial.
