amr mohamed
Occupation: : 369
Date of Birth : 1994-09-29
Join Date : 2010-11-12
Age : 29
 |  Subject: PWM  Mon 14 Mar 2011, 11:46 am | |
| PWM The definition of PWM
Abbreviation for Pulse Width Modulation. Is intended to send a wave of square or rectangular
sqare wave of this wave is a hi and low, as is well known, for example, if we have a source of AC voltage wave, and we did it through Almaekerokntrulr example, this wave may make
Average output voltage is less than five volts (4 volts or 3 or 2.4 or as we want ..), and
Important information for dc motor that lower voltage inside him whenever I
Speed
PWM wave form
As you see that the PWM is a pulse or Puls has a beginning and her end of the pulse
Consists of the following
Ton & Toff & TtotalInterest PWM Is to control the values of analog values by digital means I can control the volts on Duty
cycle
Duty cycle definition
Is responsible for the voltage output from the process of PWM, which is a percentage. For example, if
We had a five volt voltage source and made the duty cycle of fifty percent 50% of the
Voltage output rate would be 2.5 volts. If we made the duty cycle of twenty-five in
25% percent, the rate of output voltage will be 1.25 volts, and so on
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