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  1. 14041972

    SMPS design

    Thank you itsmoked and IRstuff for the input. As I mentioned I’m on a holiday and this guy thinks I can do all things. He builds audio amp and very decent home-made circuits that he sells to the locals. Now he wants to do this particular ones. He 've got a couple of MOSFETS, IGBTs and coils in...
  2. 14041972

    SMPS design

    I am in a holiday and a friend of mine (owner of an automobile workshop) have asked me to assist him constract a 20KHZ boost converter running from a car battery- 10 to 14V with an adjustable output of 19 to 24v, 1A minimum. I have tried to simulate it with PSIM software but got stuck especialy...
  3. 14041972

    Why does 3-PH AC motor fry when...

    Paw 158 This is a very common fault in 3 phase electric Motors. You will have dozens of those in the future so it is important that you understand the concept clearly. Assume you are riding a tricycle; remember it is designed to run on three wheels. When on top speed you loose one wheel. You...
  4. 14041972

    Supplied Power

    Well said jtkirb, fine and clear explanation. Shaniel21, if you are still not happy try http://www.powerstudies.com/content/resources/Diane%20Power%20Factor.pdf
  5. 14041972

    System simulation vs manual calculations

    I work in an engineering department in a manufacturing plant and in two years we will be expanding our power systems to accommodate new machinery. Normally we would out-source such design work but for the obvious reasons we are planning to do it in-house. In endeavours to prepare for this...
  6. 14041972

    verifying over current protection design

    This website (www.bussmann.com/library/docs/EPR_Booklet.pdf#search) was referred to someone last week in electrical motor forum.It explains methods of calculating over current protection, short circuit protection, component protection and cable sizing in a power system. The calculations are...
  7. 14041972

    Lighting circuit design

    Good, I thought as much. But in many cities I still see street lights comming on at the same time making me think that they are operated by a centralized timer or a daylight switch. But I get the point.
  8. 14041972

    Lighting circuit design

    itsmoked Did you understand what HCBFlash explained about twist lock. A I mentioned we have normal lamp posts different from the ones they use in the city streets. Unless there is something I need to learn.
  9. 14041972

    Lighting circuit design

    Thank you for all the responses. I now know how to continue with this project. To HCBFlash thank you for the birthday comment…you are full of humour. My apologies for asking a good question in the wrong forum. This is now happening to me the second time. The first time I walked in the city for...
  10. 14041972

    Lighting circuit design

    I have been feeling lonely over the last few days until I staggered in to this site. Boy I feel great to meet brilliant professionals like you. I will have to read all the stuff you have dealt with over the years because every sentence sounds valuable. Where have you been for so long? I know...

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