A low end controller won't protect against overspeed, but the good news is you
don't need it. Your motor is a permanent magnet motor, so it'll want to spin
one speed. Push it faster and it'll start generating electricity (regenerative
braking) that will slow it down. On top of that the hydrostatic transmission
will provide drag. My motor is similar in that the field is provided by a
steady 12 volts, so it has a constant field like a permanent magnet motor
does.. It regens down hills and overspeed is no worry even on steep grades. A
sepex or permanent magnet motor makes a great tractor motor where you want to
use its transmission designed to work with a constant speed motor. A series
motor on a steep hill would be more prone to overspeed. -----Original
message----- Sent: Monday, 04 November 2013 at 20:15:51 From: "Michael K
Johnson" <[email protected]> To: "Electric Vehicle Discussion List"
<[email protected]> Subject: Re: [EVDL] Michael's 48V lawn tractor/mower
conversion: sa
nity check The other potential benefit of a controller I understand would be
preventing overspeed, but this motor is supposed to be self-limiting. I don't
know how that is accomplished...
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