Semiconductor cooler impedance matching circuit for supplying power for photovoltaic cell

Abstract

The invention discloses a semiconductor cooler impedance matching circuit for supplying power for a photovoltaic cell, comprising a sampling module and an impedance matching module, wherein the impedance matching module is composed of an analog / digital signal conversion unit, a signal processing and controlling unit and an impedance conversion unit connected with the semiconductor cooler in series; the sampling module samples the output voltage and output current of the photovoltaic cell, and sends the sampled analog signal to the impedance matching module; the analog / digital signal conversion unit in the impedance matching module converts the received analog signal into the digital signal; the signal processing and controlling unit processes the digital signal and outputs a PWM control signal to the impedance conversion unit; and equivalent load composed of the impedance conversion unit and the semiconductor cooler realizes impendence matching with the photovoltaic cell under the control of the PWM control signal. The invention has simple structure and can cause the semiconductor cooler of which the power is supplied by the photovoltaic cell to work at the best operating point.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to an impedance matching circuit of a semiconductor refrigerator powered by photovoltaic cells. Background technique [0002] As a new type of refrigeration device, the semiconductor refrigerator has the characteristics of energy saving, environmental protection and simple equipment. The semiconductor refrigerator has good resistive characteristics, so it brings certain convenience to the drive. However, when the semiconductor cooler is powered by a photovoltaic cell, since the output voltage of the photovoltaic cell is related to the load and the voltage fluctuates greatly, it cannot be guaranteed that the photovoltaic cell and the semiconductor cooler will always work at the optimal operating point, making the semiconductor cooler The utilization efficiency is not high. [0003] The traditional solution is to add a battery as an intermediary between the semiconductor...

AI Technical Summary

Problems solved by technology

In this way, it is necessary to increase the battery and power management module, which not only increases the volume and weight, but also increases the complexity of the circuit.

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