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Old 04-21-2009, 08:26 AM
hondo hondo is offline
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Default New mosfet controller idea

OK guys, I had this idea and I would like to know if it might work or if it is not possible. I understand the power end of a controller with the mosfets, free wheeling diodes and capacitors but, is it possible to drive the mosfets with a mechanical switch? What I was thinking was kind of like a set of points on an old distributor. A v8 motor that was running at 5000 rpm opened and closed the points 20,000 times per minute (5,000rpm = 2,500 rpm distributor shaft x 8 cylinders = 20,000). Is this fast enough for the mosfets? If this would work, you could construct a multi-lobed cam driven by a small dc motor with a movable switch that varied the duration (dwell) time. Any thoughts?

Hondo
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