Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being maximum power point tracking.
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 rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load. Wikipedia, Pulse Width
See Also
compound concordant impulses
impulse
impulse frequency
Impulse Response
Interaction of Intense Laser Pulses with Atomic Clusters - Measurements of Ion Emission Simulations and Applications
Introductory Impulse
sympathetic impulse
triple impulses
triple sympathetic vibratory impulse
12.02 - Universal Energy Unit Constant or Impulse
3.11 - Introductory Impulse