What is the wave pattern principle in the inverter?

by:Power Kingdom     2021-06-24
Tags: What is the wave pattern principle in the inverter? There are three wave types in the inverter, one is a square wave type, one is a quasi-square wave type, and the other is a pure sine wave type. The maximum to the negative maximum occurs almost simultaneously. This will cause severe instability to 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 loads such as motors, washing machines, refrigerators, relays, and fluorescent lamps. 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. Aiming at the improvement of the above shortcomings, quasi-sine wave inverters, also known as modified sine wave inverters, have appeared in recent years. Although its use effect has been improved, the waveform of the modified sine wave is still composed of polyline, which belongs to the category of square wave, and the continuity is not good. The pure sine wave inverter does not have the problem of electromagnetic pollution in the grid, and the output is the same or better sine wave AC power as the grid we use daily. In summary, pure sine wave inverters provide high-quality alternating current, high efficiency, stable sine wave output, high-frequency technology, small size, light weight, and can drive any kind of load (including TVs, LCDs, refrigerators) Such as inductive load) without interference (such as Weng Weng sound and TV noise). However, the technical requirements and costs are relatively high.
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