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- Pulse-width_modulation abstract "Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique that conforms the width of the pulse, formally the pulse duration, based on modulator signal information. 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 MPPT.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.The PWM switching frequency has to be much faster than what would affect the load, which is to say the device that uses the power. Typically switchings have to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.".
- Pulse-width_modulation thumbnail PWM,_3-level.svg?width=300.
- Pulse-width_modulation wikiPageExternalLink DeltaSigma.html.
- Pulse-width_modulation wikiPageExternalLink Motor_Interface.html.
- Pulse-width_modulation wikiPageExternalLink pulse-width-modulation-pwm-555-timer-ic.html.
- Pulse-width_modulation wikiPageExternalLink pwm-demo.
- Pulse-width_modulation wikiPageExternalLink synthsecrets47.asp.
- Pulse-width_modulation wikiPageID "81242".
- Pulse-width_modulation wikiPageRevisionID "606169276".
- Pulse-width_modulation hasPhotoCollection Pulse-width_modulation.
- Pulse-width_modulation subject Category:Electronics.
- Pulse-width_modulation comment "Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique that conforms the width of the pulse, formally the pulse duration, based on modulator signal information. 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.".
- Pulse-width_modulation label "Modulación por ancho de pulsos".
- Pulse-width_modulation label "Modulacja szerokości impulsów".
- Pulse-width_modulation label "Modulation de largeur d'impulsion".
- Pulse-width_modulation label "Modulação por largura de pulso".
- Pulse-width_modulation label "Pulsbreedtemodulatie".
- Pulse-width_modulation label "Pulse-width modulation".
- Pulse-width_modulation label "Pulse-width modulation".
- Pulse-width_modulation label "Pulsweitenmodulation".
- Pulse-width_modulation label "Широтно-импульсная модуляция".
- Pulse-width_modulation label "تماثل عرضي النبضة".
- Pulse-width_modulation label "パルス幅変調".
- Pulse-width_modulation label "脈衝寬度調變".
- Pulse-width_modulation sameAs Pulzně_šířková_modulace.
- Pulse-width_modulation sameAs Pulsweitenmodulation.
- Pulse-width_modulation sameAs Modulación_por_ancho_de_pulsos.
- Pulse-width_modulation sameAs Modulation_de_largeur_d'impulsion.
- Pulse-width_modulation sameAs Pulse-width_modulation.
- Pulse-width_modulation sameAs パルス幅変調.
- Pulse-width_modulation sameAs Pulsbreedtemodulatie.
- Pulse-width_modulation sameAs Modulacja_szerokości_impulsów.
- Pulse-width_modulation sameAs Modulação_por_largura_de_pulso.
- Pulse-width_modulation sameAs m.0kz6g.
- Pulse-width_modulation sameAs Q585184.
- Pulse-width_modulation sameAs Q585184.
- Pulse-width_modulation wasDerivedFrom Pulse-width_modulation?oldid=606169276.
- Pulse-width_modulation depiction PWM,_3-level.svg.
- Pulse-width_modulation isPrimaryTopicOf Pulse-width_modulation.
