Conceptual Understanding
From a professional point of view, pure sine wave inverters generally use PWM to invert, and some even add multi-step inverters. The structure of this is complex, but the output waveform is good, and it is suitable for inductive loads and capacitive loads. Modified sine wave inverters generally use square wave inverters, and a few add step inverters. The structure is simple, but the output waveform is poor, so it is not suitable for inductive loads and capacitive loads.
How we choose the inverter?
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 modified sine 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 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.
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 the cost of a pure sine wave inverter is higher than that of a modified sine wave inverter, we still recommend choosing a pure sine wave inverter whenever possible.
