Solar photovoltaic pump alternating current and direct current intelligent identification and control circuit

Abstract

The present invention relates to a solar photovoltaic pump alternating current and direct current intelligent identification and control circuit. The solar photovoltaic pump alternating current and direct current intelligent identification and control circuit comprises a mode intelligent identification sub circuit, a continuous conduction mode (CCM) PFC sub circuit of a multiple-pole switch powerand a maximum power control sub circuit. The mode intelligent identification sub circuit is connected with a terminal (AV+) and a terminal (AV-) of a circuit, the continuous conduction mode (CCM) PFCsub circuit of the multiple-pole switch power is connected with a positive electrode (PV+) and a negative electrode (B-) of a rectifier bridge, a voltage detection sub circuit of the maximum power control sub circuit is connected between a positive electrode (VBUS+) and a negative electrode (GND), and the solar photovoltaic pump alternating current and direct current intelligent identification andcontrol circuit is characterized in that: the mode intelligent identification sub circuit and the continuous conduction mode (CCM) PFC sub circuit of the multiple-pole switch power are designed. Through adoption of the rectifier bridge and the continuous conduction mode (CCM) PFC sub circuit of the multiple-pole switch power, a solar-cell panel with an open circuit voltage level (80-300 VDC) or an alternating current (220VAC) voltage is boosted to a direct current (400VDC) voltage (between the positive electrode (VBUS+) and the negative electrode (GND)), and therefore, a system current is reduced, the loss is reduced, and the utilization ratio of a photovoltaic pump system is improved.

Description

technical field [0001] The invention belongs to the technical field of solar photovoltaic water pumps, and in particular relates to an AC / DC intelligent identification control circuit for solar photovoltaic water pumps. Background technique [0002] Today, with the massive increase in the consumption of conventional energy such as oil and coal, and the deteriorating ecological environment, countries around the world are forced to actively seek a new sustainable energy path. Clean energy sources such as solar energy, wind energy, and geothermal energy have gradually attracted the attention of human beings, and among them, solar energy is undoubtedly in the most prominent position. In remote areas far away from power grids such as Northwest my country, Tibet, and Inner Mongolia, many people cannot drink clean drinking water, but these areas are areas rich in solar energy resources. Therefore, solar photovoltaic water pump technology is widely used in these areas. It has obviou...

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Problems solved by technology

[0004] Through the above discussion, it can be seen that the main defects of the widely used solar photovoltaic water pump control circuit are: first, the circuit cannot automatically judge whether it is powered by a solar panel or an AC power supply, and at the same time, the solar photovoltaic DC power supply and the AC power supply cannot be used interchangeably. ; Second, in the solar panel power supply mode, the open circuit voltage provided by solar panels of different power levels is relatively large, and solar DC photovoltaic water pumps of different voltage levels need to be equipped to adapt to solar panels with different open circuit voltages. Too much, which is not conducive to the use and promotion of products. At the same time, for solar panels with low open circuit voltage, when driving high-power solar DC photovoltaic water pumps, the current is also relatively large, which will cause relatively large losses, resulting in a higher utilization rate of solar panels. Low

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