Principle of photovoltaic transformer

First, the principle of photovoltaic AC transformer:

1, the original side voltage of the transformer is equal, but the current is not equal.

2. When the voltage of the primary side is zero, the current of the secondary side is zero;

3, when the voltage difference between the original and the secondary side is greater than 70% of the rated working voltage, the transformer is operated with three-phase load;

4, in the case of overload, the current flowing through the transformer will increase sharply to more than 10 times the original, then if the power supply is disconnected, there will be a dangerous situation.

Two, the main role of the transformer:

1, the single phase or two relative ground voltage rise into the same frequency of sinusoidal waveform;

2, the three-phase sine waveform rise into a rectangular waveform;

3, the sine wave of different frequencies through the rectifier to get a variety of amplitude and phase of the required AC electrical signal output;

4, the direct current can be converted into adjustable AC electric energy.

Photovoltaic (PV) inverter isolation transformer is a technology which can convert light energy directly into electric energy by using the photo-generated volt effect of semiconductor interface. A key component of this technology is the solar cell. The solar cell can form a large area of solar cell module after series package protection. Combined with the power controller and other components to form a photovoltaic power generation device. Photovoltaic transformer is generally used for solar inverter. Because the photovoltaic transformer itself photoelectric efficiency is low. Therefore, high efficiency of transformer is especially required.

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