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Recent content by nikhilmahasvar

  1. N

    Need help to identify Thermistor part number.

    Thanks Brian. I will check the datasheet.
  2. N

    Need help to identify Thermistor part number.

    Hi All, Can anyone help me in identifying this part ? It is a thermistor. On package it is written as 'V2GE'. But unable to locate the part or the proper part number. Thanks.
  3. N

    Reason for Voltage Level for Off Grid Inverter System

    If you compare 2 nos 50AH battery and 1 number 100AH battery always 2 numbers will have higher cost. The cost of the control circuit and driver section also increases as you increase the voltage. Even the MOSFET's DC caps are also costly as the voltage is higher. Better efficiency and lesser...
  4. N

    problem about inverter

    For your output LC filter where is the L ?
  5. N

    1.5kva pure sine wave inverter

    7.2V Per 12V battery will be sufficient. You may need to go for a split bobbin transformer to achieve required leakage inductance if your switching frequency is less than 40Khz.
  6. N

    Inverter displaying "short circuit"

    Please check the Power and Driver section.
  7. N

    [SOLVED] A relay coil rated 24V- (is this 24Vac or 24Vdc ?)

    Normally Ac relay coils will be of more than 100Volt. It should be DC. If you still have doubt you can use a DC power supply and slowly increase the voltage from 0-24V and check the coil current.
  8. N

    role of 1N4007 and reverse current

    It is to ground the reverse current. 1N4007 will be sufficient for almost all relays. For fast switching relays i use a BA159.
  9. N

    H-bridge Mosfet protection

    Why did you place a reverse diode across the gate resistor will it not make your turn turn OFF very fast ? It will increase your dv/dt substantially and reduce the short circuit withstanding capacity.
  10. N

    [SOLVED] Detection of power failure for ups

    You could use LM358 or LM324.
  11. N

    Harmonic in UPS (The contactors shake)

    The contactors are useed for what purpose exactly ? And what is the purpose of this inverter ?
  12. N

    [SOLVED] Detection of power failure for ups

    Why don't you use a differential amplifier with few mega ohms resistor series to the input ? You could avoid the transformer and the hardware will support even if you want to do phase synchronization with the mains. Also the signals will be highly linear and you don't require a second pin. I use...
  13. N

    [SOLVED] Detection of power failure for ups

    I have seen a commercial inverter with RC filter but the c value was 0.47MFD. They were claiming computer compatibility but the changeover delay was up to 30MS when i checked with my DSO. Why don't you use one more pin and feed the rectified DC directly and then sense from there ? What is your...
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    Voltage rating for MOSFET in full bridge?

    I would suggest double of the nominal voltage as a thumb rule. But i have seen many designs with 1.5 times also.
  15. N

    The mosfet configuration of this meind inverter is some thing i never seen ever

    Was it a working unit ?
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