Affected by Russia and Ukraine, inverters become very popular

Inverters are mainly divided into two categories according to the waveform:

1. Pure sine wave inverter 2. Modified wave inverter 3. Square wave inverter.

Square-wave inverters output poor-quality square-wave alternating current, and their positive and negative peaks are generated almost simultaneously, which will damage the load and the inverter. Moreover, the load capacity of the square wave inverter is poor, only about half of the rated power, and it cannot carry an inductive load.

Compared with the square wave inverter, the output voltage waveform of the modified sine wave inverter is significantly improved, and the high harmonic content is also reduced. The traditional modified sine wave inverter is generated through the gradual superposition of opposite wave voltages. In this way, the control circuit is complicated, there are more power switch tubes for superimposing lines, and the volume and weight of the inverter are larger. In recent years, with the rapid development of power electronics technology, PWM pulse width modulation has been widely used to generate correction wave output. At present, the improved wave inverter has been widely used in user systems in remote areas, because these user systems do not have high requirements on the quality of power consumption, and the improved inverter is suitable for carrying resistance.

The pure sine wave inverter outputs high-quality AC power, which can drive a variety of loads, and basically has no damage to the load and inverter. Although pure sine wave inverters cost more than square wave and modified sine wave inverters, we still recommend choosing pure sine wave inverters whenever possible.

The output voltage waveform of the pure sine wave inverter is good, the distortion is very low, and its output waveform is basically consistent with the AC waveform of the power grid. In fact, an excellent sine wave inverter can provide higher AC power than the grid. The sine wave inverter has low interference to radio and communication equipment and precision equipment, low noise, and strong load adaptability, which can meet all AC load applications , the overall efficiency is high. Its disadvantage is that the circuit and the relative correction wave inverter transformer are complicated, require advanced control chips and maintenance technology, and are more expensive. In the case of solar grid-connected applications, a sine wave inverter must also be used to avoid electricity pollution to the public grid.