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  1. shagooo

    wound rotors

    Electricpete - I think they had three, can't be 100%positive. Typically these motors were used for the high torque applications (high duty cycle, short burst usage)and usually were screamin hot. I would imagine the most durable motors made. I have also seen the eddy current brakes used with...
  2. shagooo

    Cable

    Try using RG style coaxial cable, RG-220. We use it at 100kHz and run up to 15kV on it. I don't think the losses change much at 500kHz. You cannot use standard wire to transmit the 500kHz (skin effect)
  3. shagooo

    wound rotors

    Just a quick addition to this thread, if it's still going. Years back I encountered wound rotor motors with the rotor being connected to a series of large wattage resistors. There were also from one to four contactors across banks of these resistors that when energized, would short out the...
  4. shagooo

    Resevoir Sizing

    I have a small 1/2 hp centrifugal pump feeding a heat exchanger and heat load with a flow of 15 gpm. The heat load is fairly constant (no big cycling). I am curious if there is a general rule of thumb for sizing a resevoir tank. Thanks
  5. shagooo

    Steel Angle Iron to Concrete Achoring

    I am going to install a cement test pad for equipment which will have access troughs formed in. I will be using 1-1/4" carbon steel angle iron to use as an edge and am looking for the proper way or item that can be used to anchor the corner angle into the cement when it is poured, such as a "J"...

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