Mainly divided into two categories, one is sine wave inverter, and the other is square wave inverter. The output of the sine wave inverter is the same or better sine wave AC power as the grid we use daily, because it does not have electromagnetic pollution in the grid.

The square-wave inverter outputs poor-quality square-wave alternating current, and its maximum value in the positive direction to the maximum value in the negative direction are generated almost at the same time, which will cause severe and unstable effects on the load and the inverter itself.

At the same time, its load capacity is poor, only 40-60% of the rated load, and it cannot carry inductive load. If the load is too large, the third harmonic component contained in the square wave current will increase the capacitive current flowing into the load, which will damage the power filter capacitor of the load in severe cases.

In response to the above shortcomings, quasi-sine wave (or improved sine wave, modified sine wave, analog sine wave, etc.) inverters have appeared in recent years. There is a time between the output waveform from the positive maximum value to the negative maximum value. Interval, the use effect has been improved, but the waveform of the quasi-sine wave is still composed of polyline, which belongs to the category of square wave, and the continuity is not good. In conclusion, sine wave inverters provide high-quality alternating current, which can drive any kind of load, but the technical requirements and costs are high.

sine inverter