![]() ![]() And when the switch is off, there is no current. When the switch is made on, the voltage drop across the switch is practically zero. ![]() This frequency can be different for different applications and devices.īy imparting pulse width modulation in an application, the power loss in the switching device can be considerably reduced. ![]() The switching frequency of pulse width modulation must be higher than the rate which would affect the power device. Duty cycle is the inverse of the frequency of the waveform. The proportion of ‘on’ time to a period of time is called duty cycle. Pulse width modulation is also called pulse duration modulation. The power supplied to the load is directly proportional to the duration of the on time. The power is controlled by turning a switch on and off between the supply and load at an increased rate. Besides, it is easy to convert the PWM signals back to the analog form with the minimum use of hardware. In a simpler sense, pulse width modulation uses digital signals to control high power applications. The main use of pulse width modulation is to let the higher load electrical devices to take over the control of the power supplied to the system. Pulse width modulation is that technique by which a low-frequency signal is being generated from high-frequency pulses. ![]()
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