Patent ID: 9000737
Filing Date: 2015-04-07
Classification: H02J,H02M,Y02B,Y02E

Abstract:
1. A maximum power extraction device comprising: a battery; a voltage control unit adjusting a size of a first power outputted from the battery according to a resistor selected from a plurality of resistors, and generating a compare signal according to a size difference between an operating voltage adjusting the size of the first power depending on the selected resistor and a reference voltage; a switching unit connected between the battery and a load and adjusting a size of the operating voltage according to a size difference of the compare signal in response to first and second switching control signals; a switching control unit generating the first and second switching control signals to allow a size between the operating voltage according to the compare signal and the reference voltage to be within an error range; and a maximum power control unit measuring the number of first operations obtained by counting the occurrence number of the first or second switching control signals for a predetermined time, when the compare signal is within the error range, wherein the maximum power control unit compares the number of the first operations with the number of second operations obtained by counting a size of a maximum power in the load according to the internally stored operating voltage, and then, generates a select signal for changing a selection on the plurality of resistors on the basis of a comparison result to adjust the size of the first power.