Supplying electric loads, such as fan or battery in vehicle from solar generator

摘要

A power supply circuit for an electric load (2) like a fan or battery in a car driven off a solar generator (1) has impedance matching between the solar generator and a DC converter (6) in front of the load. There is a switch which is open or closed according to a PWM signal from a signal generator (13) and a signal from a modulator (14) with control circuitry(20). There is a voltage test signal at the controller which is a measure of the converter output voltage and this is maximised by changing the control signal going to the modulator. No microprocessor is needed and the whole thing is built using discrete analogue components.