solar energy system

Abstract

The present invention discloses a solar energy system, comprising: a transducer device, an energy management device, an electrostatic driving switch, and a DC-DC converter, wherein the transducer device converts the solar energy into the electrical energy; the output end of the electrostatic driving switch is connected with the output end of the transducer device; the input end of the electrostatic driving switch is connected with a load through the DC-DC converter; the third end of the electrostatic driving switch is grounded; and the electrostatic driving switch is used to close at a first preset voltage and to disconnect at a second preset voltage so as to control the electrical energy converted by the transducer device to provide power to the load stably, wherein the first preset voltage is higher than the second preset voltage. The energy management device is connected with the output end of the transducer device and the input end of the electrostatic driving switch respectively. The system of the invention realizes the maximum power point tracking of a solar energy management system, and uses an electrostatic driving switch instead of a judging element and an executing element, simplifying the system's overall circuit.

Description

technical field [0001] The invention relates to the technical field of micro-electro-mechanical systems (MEMS) and micro-nano energy collection and storage, in particular to a solar energy system. Background technique [0002] In applications such as sensor networks and the Internet of Things that require many small, low-power electronic devices, energy supply issues have been a bottleneck limiting their development, and periodic battery replacement is constrained by both the environment and the economy. Among them, the way to replace the battery to power the sensor network is to power these small components by harvesting energy from the environment. Solar energy is the most common and easily obtained energy in the environment. The technology of solar power generation is mature, the size of solar cells is small, the energy conversion efficiency is high, and the technology maturity is high. For a traditional solar energy management circuit, except for the front-end transduce...

AI Technical Summary

Problems solved by technology

[0002] In applications such as sensor networks and the Internet of Things that require many small, low-power electronic devices, energy supply issues have been a bottleneck limiting their development, and periodic battery replacement is constrained by the environment and economy

The short-circuit current proportional coefficient method utilizes the linear relationship between the maximum power point current and the short-circuit current, but its linearity is not as good as the FOC method, and it needs to form a short-circuit loop to measure the short-circuit current, which is more complicated

The last category is the perturbation and observation method, or mountain-climbing method: an external MCU (Microcontroller Unit, micro control unit) or DSP (Digital Signal Processing, digital signal processing) is required to form a complex control circuit, and there is a contradiction between tracking accuracy and speed

In summary, the open circuit voltage proportional coefficient method is a simple and practical method for solar maximum power tracking, but it needs reference cells and additional hardware comparison circuits to assist in the work, which is undoubtedly a waste for energy harvesting

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