PWM technical background PWM (Pulse Width Modulation). The traditional temperature-controlled fan uses a temperature probe near the fan bearing to detect the temperature of the fan‘s air inlet, thereby adjusting the fan‘s speed. Although this kind of temperature control solves certain problems, it has rough accuracy, and the speed of temperature control can only achieve high-speed and low-speed bipolar transmission. PWM is the abbreviation of pulse width modulation circuit, which has been widely used in industrial control and single-chip microcomputers. Intel combined it with the CPU temperature detection of the motherboard, and applied it to the precise control of the speed of the radiator fan, and achieved good results.

PWM technical background PWM (Pulse Width Modulation). The traditional temperature-controlled fan uses a temperature probe near the fan bearing to detect the temperature of the fan‘s air inlet, thereby adjusting the fan‘s speed. Although this kind of temperature control solves certain problems, it has rough accuracy, and the speed of temperature control can only achieve high-speed and low-speed bipolar transmission. PWM is the abbreviation of pulse width modulation circuit, which has been widely used in industrial control and single-chip microcomputers. Intel combined it with the CPU temperature detection of the motherboard, and applied it to the precise control of the speed of the radiator fan, and achieved good results.