PWM Abbreviation

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Popular abbreviations of PWM:

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What does PWM mean?

The full form of PWM is Pulse Width Modulation. For running any electrical device, moderating in the appropriate power is significant. And that’s what PWM helps us with. Suppose from an electrical bulb you want to adjust the brightness. For that approaching your electrician or changing the power supply voltage is a long process. But on the contrary, if you use PWM for the purpose, it will help you a lot.

From this article, know what does PWM stands for, its advantages and how it works, and more.

What does PWM stand for?

The term PWM stands for Pulse Width Modulation. It is an instrument helpful in regulating the velocity of the dc motor. It controls the analog circuit with the help of microcontroller digital output.

It functions mainly by chopping into parts an average power-delivered electric signal. PWM essentially is used for loading power motors which get little affected by discrete switching due to slow reaction by inertia. The other name of Pulse width Modulation is Pulse Duration Modulation.

The technique to generate PWM signals

The signal for Pulse Width Modulation (PWM) is generated from the comparator. There are two parts of input for the comparator.

The one part of the comparator input comes from the modulating signals. The second form of comparator input is from the sawtooth waveform. And once it receives two input parts it usually compares both. And once the comparison is done, it generates a PWM signal in the form of the out waveform. In case, the sawtooth signal is maxed than the modulating signal, then the output signal is in the high state.

What are the determinants of PWM signal behavior?

The method Pulse Width Modulation (PWM) helps in generating digital pulses for operating on the analog circuits. The consistency of signal behavior for PWM is dependent on two variants-

1. Frequency of PWM.

The frequency of an electrical application usually means the rate of the reputation of the object for a particular point in time. In simple terms, it’s the rate of repeated vibration, sound, and light waves for each second. The frequency of PWM is approximate to operating a specific servo. Altogether, PWM as a technique helps in creating a lower frequency of output signals out of higher pulses frequency.

2. The PWM duty cycle.

The duty cycle is the fraction of a particular period when the signal remains active. The final expression of a duty cycle occurs in the form of either ratio or percentage. Since the duty cycle is the fraction of a period, therefore you should also know what a period is. In common terms, a period is a sum of time it consumes for concluding a signal to on and off the cycle. The high signal time is referred to as on state. And duty cycle is referred to the total time the duty cycle is in the state.

Therefore, both duty cycle and frequency impacts the PWM’s capacity of application control.

Benefits from Pulse Width Modulation.

There are multiple plus points of using Pulse Width Modulation in controlling the speed of a motor. Some of the major benefits are –

• The composition price is not much high.
• It’s an energy-efficient technique of converting voltage for the light bulbs.
• There are limited noise interventions.
• The battery consumption is also low.
• It can tackle a very high voltage of power.
• Both frequency as well as amplitude and independent variables. And hence can be operated free from each other.
• When it works a very limited amount of heat is consumed.
• It has its importance in chopping the THD load of current.

All these eight points are fair enough to convince you about the efficient functioning of the Pulse Width Modulation(PWM)

Cons of using PWM.

Some of the critical aspects of using PWM are listed below-

• Some people have experienced voltage spikes while using PWM.
• Though noise interference is less still there is electromagnetic noise is present.
• The circuit through which it operates is in complex character.
• For communication purposes, the bandwidth it uses must be larger.
• And lastly, for high usage of PWM frequency, there are higher switching losses

Conclusion

Through this article, you get to know, what does PWM stand for! Its pros, cons, and how it functions. To sum up, Pulse Width modulation keeps a check on the power amount transmitted to a load. It controls the amount of power from getting wasted.