The photovoltaic power generation system mainly includes inverters, controllers, photovoltaic cell arrays, energy storage devices, etc. Photovoltaic inverter, also known as photovoltaic inverter power supply, has a complex working principle. Its main function is to convert direct current energy (DC energy) into alternating current energy (AC energy) through semiconductor power switches, meeting the needs of AC loads, equipment power supply, and grid connected power generation. So PCB is the circuit board for photovoltaic inverters, as well as the circuit board for solar inverters.
According to the frequency of the AC power output by the inverter, the photovoltaic inverter PCB board can be divided into power frequency inverters (values 50-60Hz), medium frequency inverters (values 400HZ to XNUMX, XNUMXkHz), and high-frequency inverters (values XNUMX, XNUMXkHz to MHz).
According to the number of phases of the output AC power supply, photovoltaic inverter PCB boards can be classified into single-phase inverters, three-phase inverters, and multi-phase inverters by type; According to the direction of electrical energy, it can be divided into active inverters and passive inverters.
According to the main circuit structure, the PCB circuit of photovoltaic inverters can be divided into single ended inverters, half bridge inverters, full bridge inverters, and push-pull inverters.
According to the power level, photovoltaic inverter PCB circuits can be divided into low-power inverters (below 1kW), medium power inverters (1-10kW), and high-power inverters (above 10kW).
Photovoltaic inverters are mainly composed of semiconductor power devices, inverter drivers, control circuits, etc. Among them, high-power semiconductor switching devices include insulated gate transistors (IGBT), power field-effect transistors (VMOSFETT), turn off transistors (GTO), MOS control transistors (MCT), electrostatic induction transistors (EIT), electrostatic induction thyristors (SIT), intelligent power modules (IPM), etc.
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