SOLAR-BATTERY EXCESS CAPACITY CONTROL DEVICE Russian patent published in 2003 - IPC

FIELD: secondary power supplies for feeding radio-electronic equipment; solar batteries as primary power supplies. SUBSTANCE: excess capacity control device has isolating diode whose cathode is connected to output buses for capacitance filter and load, one of them being common minus bus; power transistors whose collectors are connected through fuses to isolating diode anode and to battery plus terminal lead, their simulators being coupled with battery plus terminal lead and with common output minus bus; capacitor and power unit of control circuit connected in parallel with output buses; and power transistors control circuit common for all power modules that includes error amplifier incorporating input resistive divider connected to output buses, operational amplifier whose inverting input is connected to center tap of input resistive divider, capacitor and resistor series-connected in feedback circuit between inverting input and output of operational amplifier; ballast resistor with its one lead connected to power-unit output voltage plus bus and with its other lead, to cathode of reference-voltage regulator diode whose anode is connected to power-unit output voltage minus bus; signal picked off operational amplifier output arrives at input of pulse-width regulator and through preamplifier designed for forced driving of power transistors in conduction, to bases of power transistors; in addition it has integrated circuit introduced in error amplifier set up of resistor and capacitor; noninverting input of operational amplifier is connected to integrated- circuit capacitor-to-resistor junction point, other integrated-circuit capacitor lead being connected to power-unit output voltage minus bus and other lead of integrated-circuit resistor, to junction point between reference-voltage regulator diode and ballast resistor. Device also has threshold unit supplied with power from control-circuit power unit, two inputs of threshold unit being connected to output buses and its output, to preamplifier input. EFFECT: facilitated control of output voltage level. 2 dwg