The favored electronics simulator is LTspice, because it's free and works well. But it won't help you much with more physical stuff.
Sigh!!!About this video, one thing that confuses me is, at the beginning (without the power supply.) why the El.magnet on the right (our right ) does not attract when power off ? , while the other one on the left does .
Mine are all 100amp!some light duty EM cranes,
Sigh!!!
I thought we had this all out in PM???
Here's a re-post of my reply to your PM
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My impressions of the video...
FWIW --The electromagnets are fashioned from shaded pole ('skeleton') motors.
Owing to the 'inverse parallel' connection of the windings, the electromagnets act in opposite 'directions'...
Thus when the yellow lead is positive the electromagnet to the viewer's left 'opposes' the PM's field with the result that there is little to no attraction, or, even, repulsion (dependent upon the relative field strengths) -- while the electromagnet to the viewer's right, owing to the 'aiding direction' of its field, more intensely attracts the PM --- The converse being the case with reversed electrical polarity...
Of course when the electromagnets are not energized the PM equally attracts each electromagnet (all else being equal) owing to ferromagnetism...
Please note that there is nothing 'fringe' about this, in point of fact this principal has been used for decades (in such applications as 'fire-door closers', 'buzz-through' security locks, some light duty EM cranes, arcade games , etc...)
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With somnolent regards
HP
I've seen crane magnets (at salvage operations) powered by DC generators the size of 55 Gal. drums! --- Of course, in so heavy an application, any reverse permanent magnetic 'bias' is merely to overcome residual magnetization and, hence, assure attainment of (effective) 'zero flux' sans reversal of electrical polarity...Mine are all 100amp!
Max.
Fair enough!yes we did, but power off confused me. i thought it must attract the other one too.. when power off. it's all good now.
Thank you. appreciatedno, the speed of switching between the two coils is determined by the switching speed of the applied voltage, so use low frequency AC., bigger voltage means bigger magnetic fields.
What exactly are you trying to do? 'Cutting to the chase', as it were, is often the best approach...what is needed for the poles to be switched from N S to S N ? hehe.. never mind that. more important , if i wan't it to switch left and right very fast , will increasing the voltage help in speeding up the switch ?
What exactly are you trying to do? 'Cutting to the chase', as it were, is often the best approach...
With friendly intent
HP
PS
FWIW I'd use an 'H-Bridge' arrangement...
by Jake Hertz
by Jake Hertz
by Aaron Carman
by Aaron Carman