The difference between pure sine wave and modified sine wave inverter:
1. The modified sine wave inverter generally uses a non-isolated coupling circuit, while the pure sine wave inverter uses an isolated coupling circuit design. Prices also vary widely. Modified sine wave switching inverter power supply, not only eliminate the bulky power frequency transformer, but also greatly improve the efficiency of the inverter efficiency of 90%.
2, the modified sine wave switching inverter adopts PWM pulse width modulation to generate the modified wave output. In the inverter process, due to the use of special intelligent circuit and high-power field effect tube, the power loss of the system is greatly reduced. And add the soft start function, effectively ensure the reliability of the inverter. If the demand for electricity quality is not very high, and it can meet the needs of most electrical equipment, but it still has 20% harmonic distortion, there will be problems in the operation of precision equipment, but also cause high-frequency interference to communication equipment. The modified sine wave is relative to the sine wave, and now the output waveform of the mainstream inverter is the modified sine wave. The waveform of the inverter is mainly divided into two categories, 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 even better sine wave alternating current as the grid we use every day, because it does not exist in the grid electromagnetic pollution.