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Subject: motor control
Posted by: Örjan Olofsson
E-mail: keaton(at)ludd(dot)luth(dot)se(no spam)
I have model locos with 16V AC-series motors
(ie AC-commutating /universial motors)
and I need a circuit to improve slow speed
performance without pulsing (PWM or tyristor)
I have played with a circuit that controls
back-emf, and that should work fine with
DC permanent motors, where emf=rpm, but in
my case we have emf=rpm*current ...
When balancing current to keep back-emf
constant, the current isn't constant and
so the rpm isn't constant (at low speeds)
Ideas and drawings are welcome :)
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