Solar maximum power collecting circuit and solar maximum power rapid searching method

Abstract

The invention discloses a solar maximum power collecting circuit and a solar maximum power rapid searching method. The solar maximum power collecting circuit comprises an MPPT (Maximum Power Point Tracking) searching module, an MPPT control module and an MCU module; the MPPT searching module comprises a current detection unit, a MOS tube Q1, a switch SW1, a diode D1 and a digital-to-analog converter U1B; the current detection unit is connected with a solar cell panel; the diode D1 is connected with the current detection unit; the MOS tube Q1 is connected with the current detection unit; the digital-to-analog converter U1B is connected with the MOS tube Q1; the MPPT control module comprises a comparator, a digital-to-analog converter U1A, a resistor R6, a resistor R9 and a buck-boost regulator U3; the digital-to-analog converter U1A is connected with the comparator; the comparator is connected with the output end of the comparator through the resistor R6, and a connection point between the resistor R6 and the comparator is connected with the buck-boost regulator U3 through the resistor R9; the MCU module is connected with the digital-to-analog converter U1A and the digital-to-analog converter U1B. The solar maximum power collecting circuit and the solar maximum power rapid searching method can quickly search out the maximum power point of the solar panel.

Description

Technical field [0001] The invention relates to the technical field of energy harvesting of solar panels oriented to embedded systems, in particular to a solar maximum power harvesting circuit and a quick search method. Background technique [0002] With the rapid development of technologies such as semiconductors and wireless communications, embedded systems have become increasingly widely used. Many outdoor applications require batteries to power embedded devices. Due to the large number of devices, it is extremely inconvenient to replace the battery. In order to extend the working life of the equipment, energy consumption can be reduced by reducing the working cycle. However, to fundamentally solve the energy supply problem of the equipment, it is necessary to collect energy from the environment to supplement the battery power, and solar energy is currently one of the most effective methods. [0003] At present, the problem with some solar collector circuits used for low powe...

AI Technical Summary

Problems solved by technology

[0003] At present, the problem with some solar energy harvesting circuits for low power consumption is that they are slow for Maximum power point tracking (MPPT), resulting in partial power loss

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