PWM技术主要应用在智能车舵机上，它通过变频调节电压幅值，来改变电压的有效值，从而转换成对车的控制。对智能车的控制起到决定性作用，通过对PWM技术的运用可更好的对车的控制。-Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a commonly used technique for controlling power to inertial electrical devices, made practical by modern electronic power switches.



The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast pace. The longer the switch is on compared to the off periods, the higher the power supplied to the load is.