+ Post New Thread
Results 1 to 2 of 2
  1. #1
    Full Member level 1
    Points: 2,610, Level: 11

    Join Date
    Feb 2008
    Posts
    98
    Helped
    3 / 3
    Points
    2,610
    Level
    11

    i want to help in controlling sine wave inverter

    Hello friends
    I developed single phase sinewave inverter usin PIC 16F886 micro controller.I have used sinusoidal PWM technique to generate Sinusoidal pulses.I am getting sinewave at out of transformer this sinewave is maintaining at buld loads very nicely and aslo voltage is controlling nicely.at low battery of 10.5 volts also i am able to maintain sinewave with output voltage of 205 to 210 volts.But problem is when i put tubelights, fan or even computer sinewave is not maintaing and also output volatge is droping to 190 volts.I am not able to understand what hapening and how to control output voltage.

    can any one help me to get out of this situation....................

    •   Alt15th December 2009, 05:55

      advertising

        
       

  2. #2
    Newbie level 4
    Points: 902, Level: 6
    espirit's Avatar
    Join Date
    Feb 2008
    Location
    The Netherlands
    Posts
    6
    Helped
    2 / 2
    Points
    902
    Level
    6

    i want to help in controlling sine wave inverter

    Hello praveen,
    Without more detailed information, it is difficult to answer. However, since you use a PIC controller, you do not have much computational power. I can assume that you use a sine-pwm lookup table to drive your output.
    In that case, you will probably do calculate the PWM value each (pwm)cycle. So your feedback is not used during the 50Hz cycle, only afterwards.
    Is that a correct assumption?
    That would explain that you don't see a regulation within 1 50Hz cycle.



--[[ ]]--