2015年5月25日星期一

The various components of the solar inverter efficiency impact assessment

The use of solar PV systems more widely, not only in industry, but also began to slowly into the family. How to improve the efficiency of solar power is solar energy development has been plagued by reason. Solar cells and solar inverter itself is connected with the public grid or solar energy efficiency distribution power, solar technology is the key to success.
Solar systems, the solar cell power regulator enables work to maximum efficiency. Whether to adopt 4000w charge inverter transformer, it will directly affect the efficiency of the system. Using a transformer system efficiency will directly lead to decline 1-2%, while solar inverter DC component must be avoided, current requirements must be less than 5mA. The output filter may weaken from the output of the 4000w inverter charger stage generates a current ripple is inversely proportional to the size of the switching frequency of the filter and the costs associated with the inverter. The higher the switching frequency, the smaller the filter size, the cheaper the price. However, the higher the switching frequency, the greater the loss, the lower the efficiency, in order to take compromise, 16KHZ-20KHZ switching frequency, with low noise and high efficiency audio, meet the requirements of the solar inverter.
DC / DC converter is running at 100KHZ switching frequency states or more, the converter operating in continuous mode, which means that the boost inductor current is within the rated conditions will produce a continuous waveform. When the transistor is turned off, the diode is used as a freewheeling diode, the transistor can charge the inductor. That is, when the transistor is turned on again, the diode can automatically shut down.

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