Transformer

Discussion in 'Homework Help' started by cpleng7, Nov 24, 2010.

  1. cpleng7

    Thread Starter Active Member

    Dec 18, 2008
    120
    0
    currently i have three phase supply, how can i take the three phase supply to the microcontroller?

    Is that I can use the transformer? what type of transformer I can use? Can someone teach me ?
     
  2. themindflayer

    Member

    Oct 29, 2010
    44
    1
    I take it you want to measure 3 phase voltages ...

    simplest would be using a resistor voltage divider and connecting it to an ADC channel ....

    a better would be using a diode and a resistor so that only +ve pulses get to the uC

    a best would be using an additional capacitor so that uC receives only a dc level ... read the dc level and co-relate using a formula / LUT to actual Vrms of the phase ...

    hope this helps ....
     
  3. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    First off never connect or tamper with 3 phase. U need to be well informed on 3 phase and it's dangers.

    Unless u explain us what ur intentions are and ur experience regarding mains voltage, this thread wil be locked
     
  4. cpleng7

    Thread Starter Active Member

    Dec 18, 2008
    120
    0
    what i need to do is controlling the three phase rectifier bridge which consist of 6 SCR. Now the power supply that i have is the three phase voltage and this three phase voltage actually have to connect to the three phase induction motor. now

    below the link is the schematic that i draw and the question that i need the help . hope you all can help me. thank you!!!

    http://picasaweb.google.com/cpleng7/DCMOTOR#5543406208143172914
     
  5. themindflayer

    Member

    Oct 29, 2010
    44
    1
    not recommended for just 1 reason: inexperience with power electronics.
     
  6. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    Wow..u need to do ur homesoek
     
  7. cpleng7

    Thread Starter Active Member

    Dec 18, 2008
    120
    0
    May I know what is this mean?
     
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