New Energy Photovoltaic Wind Power
5.2PV Inverter
Solar inverter
1. Working principle of Solar inverter
Solar inverter is a device that converts direct current (DC) generated by solar panels into alternating current (AC). The working principle of Solar inverter is as follows:
1) DC input: The DC input of the photovoltaic converter is the direct current generated by the solar panel. These solar panels are typically composed of multiple solar cells, each generating a certain voltage and current.
2) Maximum power point tracking (MPPT): The Solar inverter is equipped with a maximum power point tracking (MPPT) controller, which is used to monitor the output voltage and current of the solar panel in real time, and adjust their operating points to obtain the maximum power output.
3) DC to DC conversion: The direct current of the solar panel passes through the MPPT controller and enters the DC to DC converter. The converter adjusts the voltage and current to meet the requirements of the internal circuit of the Solar inverter.
4) Inverter: The DC power after DC to DC conversion enters the inverter. The inverter converts direct current into standardized alternating current by using AC switching devices (usually MOSFETs or IGBTs). At the same time, the inverter also adjusts the phase, frequency, and voltage according to the requirements of the power grid.
5) Network connection: The AC power output from the inverter can be connected to the power grid to provide electricity for household, industrial, or commercial use. The inverter ensures that its output is synchronized with the grid and meets the voltage, frequency, and power requirements of the grid.
6) Control and protection: The Solar inverter is also equipped with a variety of control and protection functions, such as temperature monitoring, short circuit protection, overload protection, etc. These functions focus on ensuring the safe operation of Solar inverter and improving the reliability and stability of the system.
To sum up, the Solar inverter converts the DC power of the solar panel into AC power through the maximum power tracking technology, and is connected to the power grid to achieve efficient utilization and safe operation of the solar power generation system
2. Inverter system diagram
Power switch output
Synchronous boost Anti reverse
connectio
Solar panels
3. Shanghai Leiditech Recommended MOSFET List for Inverter Systems
1) Synchronous boost
|
Part No |
VDss |
ID |
RDs-Type |
pack |
|
LMFB180N03 |
30V |
180A |
2.0mΩ |
TO220-3L |
|
LMFB120N08/ LMFZ120N08 |
65V |
120A |
4.5mΩ |
TO220-3L/TO263-3L |
|
LMMP220N10 |
100V |
220A |
2.2mΩ |
TO247-3L |
|
LMMP280N10 |
100V |
280A |
1.9mΩ |
TO247-3L |
|
LMFB190N15/ LMFZ190N15 |
150V |
190A |
6.5mΩ |
TO220-3L/TO263-3L |
|
LMMP70N20 |
200V |
70A |
30mΩ |
TO247-3L |
|
LMFB75N20/ LMFZ75N20 |
200V |
75A |
17mΩ |
TO220-3L/TO263-3L |
|
LMMP70N20 |
200V |
70A |
17mΩ |
TO247-3L |
|
LMMP130N20 |
200V |
130A |
18mΩ |
TO247-3L |
|
LMMP150N20 |
200V |
150A |
9.0mΩ |
T0247-3L |
|
LMMP60N25 |
250V |
120A |
17mΩ |
TO247-3L |
|
LMFB160N04 |
40V |
160A |
2.0mΩ |
TO220-3L |
|
LMMP50N20 |
200V |
50A |
50mΩ |
TO247-3L |
|
LMFB110N05 |
55V |
110A |
7.0mΩ |
TO220-3L |
2) Anti reverse connection
