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  1. pirulo

    Smear on the rotor surface (electric motor)

    Dear all Can somebody explain me the meaning of the term smear, I am dealing with some document that speak about the smear is caused by the cutting tool when the diameter of the rotor is finished. Any picture? Thanks in advance
  2. pirulo

    Winding Generator

    Hello Wolf Thanks for the interest, we are a motor repair shop and we was receive the two attached drawings for quote 80 Coils.No more Information.The Alternator is in France But I hope speaking with the costumer we can get the information. Regards Pirulo
  3. pirulo

    Winding Generator

    Hello all Attached you will find all coil specs, maybe the coil drawing will tell more , sorry all in french the costumer request 80 coils for this generator with 144 Slots. Thanks Pirulo http://files.engineering.com/getfile.aspx?folder=2e7aacbe-e4db-428a-b14d-82f64521d10b&file=Sketch.doc
  4. pirulo

    Winding Generator

    Hello pete, Can´t be double layer because the coils = slots/2, for 12 poles x 3 phases =36 groups and 72 coils/36 = 2 coils per group. The span is 1-10 so the winding could be done. Usually in one double layer you will have two active coils in each slot but in a single layer we will have...
  5. pirulo

    Winding Generator

    Dear Muthu Here a New Attachment Pirulo http://files.engineering.com/getfile.aspx?folder=b41a5c65-0f25-42fc-8e9e-e59f9e0f6591&file=Generator¦s_Coil.pdf
  6. pirulo

    Resin Rich Coil Test

    Dear All I am interesting in to know how to made test in resin rich coils, I want to use the guide lines of IEEE 522 but I am confused, we are going to use a Surge comparison tester manufactured by Baker, wich voltages levels we have to use? Is this instrument a marx generator? wich rise time...
  7. pirulo

    Winding Generator

    Hello All We was requested in order to make a new winding for one generator the name plate is : 3.5 MVA 5.5 KV 367.4 Amps Cos Phi 0.9 12 Poles 50 Hz 500 RPM. The slot numbers are 144 and the winding have 72 coils. So only one coil side in each slot single layer windind. The attached...
  8. pirulo

    Amount of tape to manufacture form coils

    Thanks for the answer pete, I will suggest add 10 % to allow for greater lapping around the the leads and knuckles So the Pete´s formula is converted to : Tape Length per coil = 2.2*DP*NL * CP / W where DP = Diamond coil perimeter travelling all the way along both slots and both...
  9. pirulo

    Amount of tape to manufacture form coils

    Dear All We are trying to develop a good procedure to calculate the amount of tape (in length) necessary for one form coil, so if you have some good guide lines about it will be good. Thanks for the Inputs and best regards Pirulo
  10. pirulo

    WRIM Induction Motor working like a Wind generator

    Hello I am new at this forum and I want to know how works one WRIM like wind generator. Thanks and best regards Pirulo

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