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Recent content by samEEEf

  1. S

    H-Bridge Converter and Inverter

    I agree with you. But I want to go ahead skipping H-Bridge part for the time being. - - - Updated - - - Thanks for your feedback. Could you please elaborate it about symmetrical drive?
  2. S

    H-Bridge Converter and Inverter

    I want to test my concept of full bridge converter (12v DC to 400v DC) by generating 50kHz signal from arduino/other MCU. It will look like DC12vBatt--->H-Bridge---->FerriteTransformer(step up, say for example getting 400v)----->Rectifier-->Filter (400v DC) Major challenges are in making...
  3. S

    Way forward of H-Bridge inverter/converter common issues

    Bootstrap part of the IR2110 is the main issue. Is there any driver having high current rating similar to motor controller?
  4. S

    Way forward of H-Bridge inverter/converter common issues

    To make inverter/converter with H-bridge configuration, we have to face difficulties with Hi-low side MOSFET/IGBT driver. IR2110 is commonly used driver for this which has issue with heating up and being damaged found in this forum. Does anyone have any good alternative chip/IC to the H-Bridge...
  5. S

    Lead Acid Battery charge controller using already available power supply unit

    Thanks Warpspeed for the clarification. You chose the wattage of filament lamp using trial and error method. 18w fits with your battery capacity. But what is the math of getting right lamp for the required Battery capacity. Also need to know what technique is used in professional design for...
  6. S

    Lead Acid Battery charge controller using already available power supply unit

    Similar design except the bulb in series with the battery. The bulb is equivalent to 8ohm resistance. If battery internal resistance is 4-5 ohm or less, will the battery be charged? There will be significant voltage drop in resistance compared to the battery whose internal resistance is much...
  7. S

    Lead Acid Battery charge controller using already available power supply unit

    My plan is to make a charge controller to auto charge a 12v Lead Acid battery. Here is the idea - 1. Power supply will be adjusted to deliver a safe voltage above 12 volt. Say 14v. Note that ampare rating of the power supply is 20A (safe for a 120AH battery) 2. Power supply will be connected...
  8. S

    [SOLVED] charging li-ion battery safely

    Thanks for clarifying li ion battery. Is it ok for Lead Acid battery?
  9. S

    [SOLVED] charging li-ion battery safely

    I think primary concern is the current while charging li ion battery. While charging the battery, my understanding is current can be controlled ony by controlling voltage across the battery. Charging current can only be increased if terminal voltage is increased.
  10. S

    What algorithm Qualcomm quick charge 2.0, 3.0

    So, it will start charging with 5.0v then increase to 5.2v after some time then again it will increase voltage to 5.4v ad so on?
  11. S

    What algorithm Qualcomm quick charge 2.0, 3.0

    Need technical explanation of the quick charging technique of Qualcomm's Quick charge 2.0, 3.0.
  12. S

    Experiment with electric ballast powered fluorescent tube

    I'm experimenting the tube light used in my house. I found the following results - Line voltage, Vl: 228.7 v Voltage across the ballast, Vb=172.7 v Voltage across the tube, Vt= 120.6 v All the voltages are measured in rms value. My question is why it is not satisfying the following? Vl=Vb+Vt...
  13. S

    Basic SMPS power supply design

    PI expert uses their own chip. Actually I wanted to learn to design it myself using some power semiconductors (mosfet, igbt ) generating gate signal from microcontroller.
  14. S

    Basic SMPS power supply design

    I want to design a basic power supply using flyback or bridge converter topology. It seems okay from my understanding point of view if the input voltage is low (say 12 or 24). But what usually do in the practical design when the input voltage is the line voltage (230v ac)? As we will have to...
  15. S

    Experimenting single phase induction motor from basic

    I want to know more on induction motor. Don't know whether this is the right place to do so. I want to know about the stator winding. How many turns should it have per coil? It should be same for all motor havong same terminal voltage rating. e.g, each 230v single phase motor should have same...

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