Visualizing the Permanent Magnet Negative Impulses

The following is kindly taken from Bill's mathematical analysis of the Dragone equations, as both devices force permanent magnets to deliver the exact same brief negative impulses. This graphic illustrates how the strength of the negative impulse, decays from the moment of switch closure. This is why smaller magnets (3/4" being about optimal) work better than larger ones, and why the motor runs colder at higher rather than lower speeds. It is all about pulse width.

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