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Recent content by lalgpt

  1. L

    [PIC] DC motor soft start pwm with pic ccs c

    Which type of control, field control or armature voltage control ?
  2. L

    How to read this I-V characteristic curve which represents the device breakdown

    In this graph see the change of current when the voltage is increasing the region 5v to 40v current is almost linear
  3. L

    Difference between MPCB and MCB

    Motor type load is entirely different from any other type load so it requires special attention while loading
  4. L

    [SOLVED] How to modify Sine wave table according to the input ADC

    Can you give that idea to correct the sine table with PI
  5. L

    Sinewave Inverter When adding ADC read in program lowers the switching frequecy

    Thank you steveelliott, i will try this. after that I will be back here. one more problem is there with this program while changing the above sine table in to float sintable [10]= {0.1,0.2,0.3,..............} etc it aslo reducing the switching frequency
  6. L

    Sinewave Inverter When adding ADC read in program lowers the switching frequecy

    Please help me i am very weak in c programming...................................................... I am Using PIC18F452 with 20MHz crystal
  7. L

    Sinewave Inverter When adding ADC read in program lowers the switching frequecy

    Hi all this the program that i have tried to generate sine wave PWM but has a problem when without adding the ADC it works fine but when adding ADC read it lowers the switching frequency const unsigned char sinetable[123]={0,6,13,19,25,32,38,44,51,57,63,69,75,81,88,93,99,105,111,117,122,128...
  8. L

    [SOLVED] Specification of adapter.

    This transformer can deliver a power of V x I x power factor = watts if your load is a resistor, the power taken by the resistor = 5 x 0.5 x 1 = 2.5 watts (max)
  9. L

    Using interrupts in PIC18F452

    My aim is to generate 80uS PWM using interrupt I don't know how to use interrupt in PICs.
  10. L

    please explain what is average power ?

    Try to under stand average value of a time dependent quantity instead of average power Then from that try to understand Instantaneous value,average and max. value of current and voltage then u can calculate Average power
  11. L

    DC Causes Transformer to Wear out??why?

    Over current is responsible for the burning of the winding. DC supply I=V/R Current is by only the winding resistance AC Supply I=V/Z Current is by winding resistance and Inductance Z=Sqrt. R^2+XL^2 So when applying DC supply, resistance only there to oppose the flow of...
  12. L

    how to determine current parameters

    At the maximum power point (example) Input voltage 230V Output voltage 115V regulation (230=115)/230*100 Only 50% Oh my *** is it true ?
  13. L

    how to determine current parameters

    Transformer core materials is always not be the same ( silicon steel with iron content high ). Then how the weight can compared ?. - - - Updated - - - Absolutely right BradtheRad - - - Updated - - - Efficiency % =Output/input * 100 Output + losses = Input power losses = Copper loss +...
  14. L

    Solar Mobile phone charger

    More care about the wattage rating. You can't extract power above 5W from this single panel.
  15. L

    how to determine current parameters

    I think ."By monitoring the temperature and take a decision from that" It is not a good practice. Your transformer insulation property will be lost. In smaller KVA rating transformers it is the actually happening with this test.

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