Power supply circuits and inverters

Abstract

The application discloses a power supply circuit and an inverter, which relate to the field of power supply and are used to improve the service life of an energy storage module in a solar inverter. The power supply circuit includes: a first input terminal, a second input terminal, a first output terminal, a second output terminal, a first voltage conversion circuit, a rectification circuit, a second voltage conversion circuit, and an energy storage module. The input terminal of the first voltage conversion circuit is connected to the output terminal of the solar panel as the first input terminal; the first output terminal of the first voltage conversion circuit is connected to the first power supply terminal of the monitoring chip as the first output terminal of the power supply circuit; the first The second output end of the voltage conversion circuit is connected to the input end of the energy storage module; the input end of the rectification circuit is used as the second input end to connect at least one phase of alternating current of the AC grid; the output end of the rectification circuit is connected to the input end of the second voltage conversion circuit; Both the output terminals of the second voltage conversion circuit and the energy storage module are connected to the second power supply terminal of the monitoring chip as the second output terminal of the power supply circuit.

Description

technical field [0001] The present application relates to the field of power supply, in particular to a power supply circuit and an inverter. Background technique [0002] In solar power generation equipment, the inverter is used to convert the direct current generated by the solar panel into alternating current and connect it to the grid. In addition, the monitoring chip in the inverter is also used to record the power generation and operation of the solar panel. [0003] Such as figure 1 As shown, in the case of sunlight during the day, the DC voltage conversion module 21 of the inverter 20 converts the DC high voltage (such as 1000V) generated by the solar panel 10 into the working voltage (such as 3.3V) of the monitoring chip 22, so that the monitoring Chip 22 can work normally. In the case of no light at night, the solar panel 10 cannot work, so it cannot supply power for the normal operation of the monitoring chip 22. At this time, the energy storage module (such as...

AI Technical Summary

Problems solved by technology

In the case of no light at night, the solar panel 10 cannot work, so it cannot supply power for the normal operation of the monitoring chip 22. At this time, the energy storage module (such as battery or supercapacitor) 23 supplies power for the real-time clock of the monitoring chip 22. The real-time clock can only be used for timing or timing

[0004] However, generally solar panels require a long working time (for example, 25 years), and the energy storage module has a short service life due to frequent charging and discharging, and it is difficult to guarantee long-term use.

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