Title :
Analysis of the dynamic characteristics in the overcurrent limited mode of the DC-DC converter
Author :
Matsuo, Hirofumi ; Kurokawa, Fujio ; Maeda, Minoru ; Tanaka, Koichi
Author_Institution :
Dept. of Electron., Nagasaki Univ., Japan
Abstract :
The steady-rate and dynamic characteristics of the overcurrent-limited mode of the DC-DC converter are studied theoretically and experimentally. The circuit conditions are defined for the foldback-current-limiting, constant-current, and voltage-drooping characteristics, which are realized when the DC voltage gain of the overcurrent-limiting control loop is larger than, equal to, and less than unity, respectively. It is shown that the stability in the overcurrent-limited mode and the transient response from the load point in the constant voltage regulated mode to that in the current-limited one can be improved by using relatively large DC voltage gain and by appropriately adjusting the rate time and reset time in the derivative and integral compensators, respectively.<>
Keywords :
overcurrent; power convertors; DC voltage gain; DC-DC converter; constant-current characteristics; dynamic characteristics; foldback current limiting characteristics; overcurrent limited mode; stability; steady-state characteristics; voltage-drooping characteristics; Capacitors; Circuit stability; Current limiters; DC-DC power converters; Inductors; Protection; Resistors; Steady-state; Transient response; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, 1988. PESC '88 Record., 19th Annual IEEE
Conference_Location :
Kyoto, Japan
DOI :
10.1109/PESC.1988.18157
