With the development of resonant switching power supply , thinking resonant converter is also used in the inverter power supply system , which constitutes a resonant inverter efficiency . 8000w high frequnency inverter The inverter is the use of a zero voltage or zero-current switching technology in the DC / DC converter , and thus can basically eliminate switching losses , even after more than 1MHz switching frequency when more power efficiency is not significantly reduced. Experiments show that : in the same operating frequency , the resonant conversion loss comparable non-resonant mode conversion was reduced by 30 % to 40 %. Currently, the resonant frequency of the power supply of up to 500kHz to 1MHz.
Also worth noting is that the study of photovoltaic systems with small power inverter is moving in the direction of the development of modular , which uses a combination of different modules , can constitute different voltage waveform conversion system .
Undoubtedly, medium power PV systems will use high-frequency inverter power conversion circuit structure. In some of the technical details , will be different from the power inverter other occasions , such as the addition to the pursuit of high reliability, high efficiency outside , but also for the photovoltaic industry, the characteristics 40A mppt charge controller of the control , the inverter effectively combined, ie PV inverter should be designed with overvoltage , undervoltage , short circuit , overheating, reverse polarity protection. This not only reduces the cost of the system, and improve the reliability of the system.
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