The modified sine wave inverter has a time interval between the maximum value of the output waveform from the positive direction to the maximum value of the negative direction. The use effect has been improved, but the quasi-sine wave waveform is still composed of polylines and still belongs to the category of square waves. , The continuity is not good, and there is a dead zone. Modified sine wave inverters generally use non-isolated coupling circuits, while pure sine wave inverters are designed with isolated coupling circuits, and their prices are also quite different.
The modified sine wave inverter generally uses a non-isolated coupling circuit, while the pure sine wave inverter uses an isolated coupling circuit design(high frequency sine wave inverter). The price is also very different. Modifying the sine wave switching inverter power supply not only saves the bulky power frequency transformer but also greatly improves the inverter efficiency by 90%.
The modified sine wave switching inverter power supply uses PWM pulse width modulation to generate the modified wave output. In the inverter process, due to the use of dedicated smart circuits and high-power field effect tubes, the power loss of the system is greatly reduced. And increase the soft-start function, effectively guarantee the reliability of the inverter. If the power quality requirements are not very high, and it can meet the needs of most electrical equipment, it still has 20% harmonic distortion, which will cause problems when operating precision equipment and cause the high frequency of communication equipment. interference.
The modified sine wave is relative to the sine wave. The output waveform of the mainstream inverter is now the modified sine wave. The waveform of the inverter is mainly divided into two types, one is a sine wave inverter (that is, a pure sine wave inverter), and the other is a 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.