Abstract ▼ AI-Helper

Recently, it is increased to adopt inverter system to household electrical appliances, especially in ai conditioner and refrigerator. Inverter system is adopted for improving the efficiency. But Inverter system makes acoustic noise caused by switching frequency. In household electrical appliace, ...

Recently, it is increased to adopt inverter system to household electrical appliances, especially in ai conditioner and refrigerator. Inverter system is adopted for improving the efficiency. But Inverter system makes acoustic noise caused by switching frequency. In household electrical appliace, it is important to reduce acoustic noise. And in some cases it is possible to magnify the acoustic noise caused by switching, by system which may have different transfer characteristic. In this paper, random PWM method was adopted in inverter refrigerator using 8 bit microprocesso. We found useful PWM frequency and adoptation method.