A nine-level inverter
An inverter, nine-level technology, applied in electrical components, AC power input into DC power output, output power conversion devices, etc., can solve the problem of damage to output power quality, low efficiency, and reduce inverter work efficiency And other issues
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[0094] When the inverter is working, there may be a power frequency or high frequency jump voltage of the DC power supply relative to the output negative pole (equal potential with the ground), and due to the existence of the parasitic capacitance of the DC power supply (such as a solar panel) to the ground, it may cause There will be a leakage current problem. The leakage current problem will not only damage the output power quality and reduce the working efficiency of the inverter, but also cause harm to the human body and reduce the reliability of the inverter. For example, figure 1 It is an existing five-level inverter. When the inverter is working, there will be a power frequency jump at the DC power supply DC relative to the output negative pole, that is, at point C. It can also be said to be at the midpoint of the bus, that is, the capacitor There is a power frequency jump between the common terminal of C1 and capacitor C2, or the DC negative pole of the DC power suppl...
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