Patent ID: 6239584
Filing Date: 2001-05-29
Classification: H02M,Y02B

Abstract:
A boost power converter driving a load comprising in combination:a voltage source having a first and a second terminal;a series connection of a first boost inductor and a first boost switch, said first boost switch connected to said first terminal of said voltage source;a series connection of a second boost inductor and a second boost switch, said second boost switch connected to said first terminal of said voltage source;an auxiliary transformer having a primary and a secondary winding, said primary winding connected between said second terminal of said voltage source and said first boost inductor of said series connection of said first boost inductor and said first boost switch, said secondary winding connected between said secondary terminal of said voltage source and said second boost inductor of said series connection of said second boost inductor and said second boost switch, said auxiliary transformer coupling the current path of said first boost inductor with the current path of said second boost inductor so that the energy in said first boost inductor and said second boost inductor increases and decreases simultaneously as said first and second boost switches are periodically open and periodically closed;a power output circuit including diodes and capacitors coupling the common node of said series connection of said first switch and said first boost inductor and the common node of said series connection of said second switch and said second boost inductor to said load;a control circuit, responsive to variations of said load and said voltage source, controlling the duration of on and off states respectively of said first and second boost switches to maintain the voltage across said load within predetermined range of values.