Small-Signal Transfer Functions of the Classical Boost Converter Supplied by Ultracapacitor Banks
Ultracapacitor is an emerging device for energy storage that can replace batteries in some short-term applications. Due to the fact that the terminal voltage of an ultracapacitor varies with the level of energy stored, a power electronic converter with voltage boosting capability is usually needed at its terminals to interface with a load operating at a constant voltage. For the case of a classical boost dc-dc converter supplying a resistive load by drawing energy from a bank of ultracapacitors, the paper derives small-signal transfer functions by considering a time-varying steady-state. To reduce the complexity of resulting exact expressions of poles, highly accurate approximate expressions are also derived. Furthermore, it compares how the control characteristics change when a constant voltage source such as a battery replaces the ultracapacitor bank. A numerical example is presented to demonstrate the accuracy of the approximate values of poles and zeros and to describe how the poles and zeros vary with the duty ratio.
R.M.A.S.RAJAKARUNA
Nanyang Technological University, Singapore
国际会议
2nd IEEE Conference on Industrial Electronics and Applications(ICIEA 2007)(第二届IEEE工业电子与应用国际会议)
哈尔滨
英文
2007-05-23（万方平台首次上网日期，不代表论文的发表时间）