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shorted turns

Discussion in 'Hobby Electronics' started by [email protected], Dec 18, 2007.

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  1. Guest

    I need help in designing a D.C. solenoid former. I am aware of eddy
    currents in an A.C. solenoid or transformer, & note that D.C.
    solenoids can have a metal former wich is in effect a shorted turn,
    (but as there is no alternating magnetic field there is no eddy
    currents) but I wish to pulse a solenoid at about 3 Hz. The solenoid
    current will be about 2 amps. I could slit the former & provide an air
    gap, but prefer not to. I have searched the net but can't find any
    info re shorted turns with pulsed D.C. Any constructive comments
    greatly appreciated. Davey.
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