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abs_vicky
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Actually i m new to electrical sciences, can anyone please explain me the working principle of a PWM?? and its applications , please provide any relevant links concerning it. Thanks in advance
abs_vicky said:Actually i m new to electrical sciences, can anyone please explain me the working principle of a PWM?? and its applications , please provide any relevant links concerning it. Thanks in advance
Pulse Width Modulation is a technique used to control the amount of power or voltage being supplied to a device by quickly switching between fully on and fully off states. This results in an average voltage that can be varied by changing the ratio of on and off time.
PWM works by using a pulse signal with a fixed frequency and varying the width of the pulses. A longer pulse width corresponds to a higher average voltage, while a shorter pulse width corresponds to a lower average voltage. By changing the duty cycle (ratio of on time to total time) of the pulses, the average voltage can be controlled.
PWM offers several advantages, including efficient use of power, precise control of voltage or power, and the ability to control devices that require high voltage or power. It also allows for smooth and precise motor control and reduces the amount of heat generated, making it ideal for use in electronic devices.
PWM is commonly used in electronic devices such as motor speed control, LED dimming, and power supply regulation. It is also used in audio amplifiers, DC-to-DC converters, and many other applications where precise control of voltage or power is required.
One potential drawback of PWM is that it can introduce high-frequency noise, which may interfere with other electronic components. It can also cause electromagnetic interference, which can affect sensitive electronic devices. Additionally, the switching frequency of PWM may cause audible noise in some applications.