MAXIMUM POWER POINT TRACKING CIRCUIT FOR THERMOELECTRIC GENERATORS

摘要

PURPOSE: A maximum power point driving circuit for a thermoelectric power generating device is provided to simply control the output voltage of a thermoelectric module without using a micro controller, thereby maximally using power generated in a thermoelectric module. CONSTITUTION: A half voltage sampling unit(230) samples the half voltages of both ends of a thermoelectric module at every fixed sampling period. A comparator(260) generates an output signal by comparing the half voltages of both ends with the output voltage of a thermoelectric power generating device. A DC-DC converter(270) is controlled by the output signal of the comparator. The DC-DC converter makes the output voltage of the thermoelectric power generating device to be equal to the half voltages of both ends.