Editing Pulse-width modulation (section)

===Electrical===
SPWM (sine–triangle pulse-width modulation) signals are used in [[solar inverter]] design. These switching signals are fed to the [[FET]]s that are used in the device. The device's efficiency depends on the harmonic content of the PWM signal. There is much research on eliminating unwanted harmonics and improving the fundamental strength, some of which involves using a modified carrier signal instead of a classic sawtooth signal<ref>Hirak Patangia, Sri Nikhil Gupta Gourisetti, "A Harmonically Superior Modulator with Wide Baseband and Real-Time Tunability", IEEE International Symposium on Electronic Design (ISED), India, Dec.11.</ref><ref>Hirak Patangia, Sri Nikhil Gupta Gourisetti, “Real Time Harmonic Elimination Using a Modified Carrier”, CONIELECOMP, Mexico, Feb 2012.</ref><ref>Hirak Patangia, Sri Nikhil Gupta Gourisetti, “A Novel Strategy for Selective Harmonic Elimination Based on a Sine-Sine PWM Model”, MWSCAS, U.S.A, Aug 2012.</ref> in order to decrease power losses and improve efficiency. Another common application is in robotics where PWM signals are used to control the speed of the robot by controlling the motors.