Multi-Source Boost Converter
Original Publication Date: 1984-Dec-01
Included in the Prior Art Database: 2005-Feb-06
This article describes a circuit arrangement wherein a switching power system front end accepts 70-240 volts alternating current (AC) inputs or 36-300 volts direct current (DC) battery backup inputs and converts to a regulated high voltage DC (HVDC) value. This arrangement eliminates the need for separate power supplies or power supply wiring for different AC line voltages. It also yields limited power factor correction and provides direct operation from 36 to 48 volts DC, thereby solving the sensitivity problem to momentary power line outages. Referring to Fig. 1, L1, Q1, D1 and L2, Q2, D2 along with C1 and C2 are configured to form a dual boost inverter, with AC voltage input converted to DC via the bridge rectifier B1.