hI
I have a motro thw controlled by a PWM signal the mean poweR that absorb from
motor is Ppeak *(τ/Τ) or peak *(τ/Τ)^2 ?

thank
George

 

Hi George,
Please enlighten me:

motro?
thw?
PowerR?
Ppeak?

What is the basic setup - a motor being driven by pwm, a dynamic braking system, or something else?

 

Hi George,
Please enlighten me:

motro?
thw?
PowerR?
Ppeak?

What is the basic setup - a motor being driven by pwm, a dynamic braking system, or something else?

Hi i have a square wave kwith peak Vp duration τ and period T thia pulse appled toa resitor R waht is the mean value absorb by load ?

 

If you know the power P when the unit is 'on' (during the pulse 'on' times) then the power is the average power:
Pavg=P*tau/(T+tau)

So if your power P is 100 watts and the pulse is on for a 10 percent duty cycle, the average power is 10 watts. A 70 percent duty cycle would mean the load would see 70 watts average power.

This would be for a load that does not change over time because of heating or something else.
A motor may be different if the power requirement changes with current.


You only get into squares and square roots when you have to deal with the current or voltage not the power itself.