Title :
Design Consideration of a Novel Digital Bidirectional Constant Current Source Used in Hybrid Electric Vehicle
Author :
Hu, Qingbo ; Lü, Zhengyu
Author_Institution :
Nat. Key Lab. of Power Electron., Zhejiang Univ., Hangzhou
Abstract :
Two novel circuit topologies dedicating to system within storage battery as standby power supply and operating as bidirectional current source used in hybrid electric vehicle (HEV) are proposed in this paper, and both advantages and disadvantages between the two proposed topologies are investigated. Functions of both discharging process with large current from battery to the relative lower voltage load end and charging process with constant current to the reverse direction are realized by the presented circuit. Meanwhile, a strategy of digital control, which implements the control of constant current for the bidirectional circuit and furthermore realization of power management for battery is achieved, is proposed as well. In addition, an opening loop control scheme base on F2407A DSP chip is adopted when inductor current is in an intermittent condition. Characteristic of excellent current source for the very digital control circuit is verified in the experiment, and these circuit topologies and control scheme can be used in HEV system
Keywords :
battery management systems; battery powered vehicles; constant current sources; digital signal processing chips; electric current control; emergency power supply; hybrid electric vehicles; microcontrollers; open loop systems; secondary cells; F2407A DSP chip control; charging process; current control; digital bidirectional constant current source; discharging process; hybrid electric vehicle; opening loop control; power management; standby power supply; storage battery; Battery management systems; Circuit topology; Digital control; Digital signal processing chips; Emergency power supplies; Energy management; Hybrid electric vehicles; Inductors; Open loop systems; Voltage; Bidirectional constant current source; full-digital control; intermittent current; storage battery;
Conference_Titel :
Power Electronics and Motion Control Conference, 2006. IPEMC 2006. CES/IEEE 5th International
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0448-7
DOI :
10.1109/IPEMC.2006.4778039