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Vehicle electric power simulator for optimizing the electric charging system
Technical Paper
2000-05-0054
Sector:
Language:
English
Abstract
The electrical power system is the vital lifeline to most of the
control systems on modern vehicles. The demands on the system are
highly complex, and a detailed understanding of the system behavior
is necessary both to the process of systems integration and to the
economic design of a specific control system or actuator.
The vehicle electric power system, which consists of two major
components: a generator and a battery, has to provide numerous
electrical and electronic systems with enough electrical energy. A
detailed understanding of the characteristics of the electric power
system, electrical load demands, and the driving environment such
as road, season, and vehicle weight are required when the
capacities of the generator and the battery are to be determined
for a vehicle. An easy-to-use and inexpensive simulation program
may be needed to avoid the over/under design problem of the
electric power system.
A vehicle electric power simulator is developed in this study.
The simulator can be utilized to determine the optimized capacities
of generators and batteries appropriately. To improve the
expandability and easy usage of the simulation program, the program
is organized in modular structures, and is run on a PC. Empirical
electrical models of various generators and batteries, and the
structure of the simulation program are presented. For executing
the vehicle electric power simulator, data of engine speed profile
and electric loads of a vehicle are required, and these data are
obtained from real driving conditions. In order to improve the
accuracy of the simulator, numerous driving data of a vehicle are
logged and analyzed.