Title :
Control algorithms and circuit designs for optimally flyback-charging an energy-storage capacitor (e.g. for a flash lamp)
Author :
Sokal, Nathan ; Redl, Richard
Author_Institution :
Design Autom. Inc., Lexington, MA, USA
Abstract :
Optimum flyback-charging of an energy-storage capacitor is discussed. It charges the capacitor to a specified voltage within a specified time, with minimum peak current in the transistor and a transformer. Recommended methods are hysteretic current-mode control with current sensing in both transformer windings, peak-current-commanding current-mode control with switching frequency or transistor off time varying in a prescribed way during the charging, or valley-current-commanding current-mode control with switching frequency or transistor on time varying in a prescribed way during the charging.<>
Keywords :
capacitors; electric current control; power transistors; transformers; circuit designs; control algorithms; current sensing; energy-storage capacitor; flash lamp; hysteretic current-mode control; optimum flyback charging; peak-current-commanding current-mode control; switching frequency; transformer; transformer windings; transistor; transistor off time; transistor on time; valley-current-commanding current-mode control; Algorithm design and analysis; Capacitors; Circuits; Current transformers; Inductance; MOSFETs; Optimal control; Pulse transformers; Space vector pulse width modulation; Voltage;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1990. APEC '90, Conference Proceedings 1990., Fifth Annual
Conference_Location :
Los Angeles, CA, USA
DOI :
10.1109/APEC.1990.66422
