Sine wave and modified sine wave
Sine wave power inverter output is the same as the grid we use every day even better sine wave AC, because it does not exist power of electromagnetic pollution. Square wave inverter output power is the poor quality of the square wave AC, its positive maximum to negative almost at the same time generate the maximum, so causing severe destabilizing effects on the load and the power inverter itself. Meanwhile, the load is low, only 40-60% of the rated load, not with inductive load. As the load carried is too large, square-wave current third harmonic components contained will flow into the capacitive load current increases, severe damage to the load of the power supply filter capacitor. In response to these shortcomings, in recent years there has been quasi-sine wave (or modified sine wave, modified sine wave, sine-wave, etc.) 48v to 220v power inverter, the output waveform from the positive to the negative maximum value between the maximum value there is an intervals, using the results improved, but is still quasi-sine wave by the broken line, belonging to a square wave category, continuity is not good, and there is a dead zone. All in all, sine wave power inverter provides high-quality alternating current, can bring any kind of load, but the technical requirements and costs are high. However, some sophisticated electronic equipment and appliances must use inductive load class sine wave power inverter. Otherwise, ranging might cause related electronic device is not working properly, it caused heavy equipment and power inverter damage or shorten its expected life. Quasi-sine wave power inverters meet our daily most of the electricity demand, high efficiency, low noise.