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Dynamic Braking of 3-Phase DC Motor | Physics Forums
to brake a 3ph dc, the best i've come up with, apparently, is to place a pair of power fets, back-to-back across each pair of leads. i would like to manage a hard short without additional load beyond the motor winding resistance, then duty cycle to get controlled braking. as far as having the
dynamic braking is the use of an electric traction motor as a generator when slowing a vehicle such as an electric or diesel-electric locomotive. it is termed "rheostatic" if the generated electrical power is dissipated as heat in brake grid resistors, and "regenerative" if the power is returned to the supply line.
the concept of dynamic braking is totally in the realm of diesel locomotives, nothing of the sort was a remote possibility with steam power since it did not utilize any type of electrically operated equipment as a means to generate forward motion.
Dynamic Braking and EMD 'E' Units. - Trains Magazine
i was reading a book on sp passenger service. within the book there was a segment on the shasta daylight and the power that hauled it. it stated that it was originally intended that the power for the train would be emd e-7's however shortly after the train started operating the power was switched to alco pa's because the pa's had dynamic braking and the e units didn't.
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modern cars have brakes on all four wheels, operated by a hydraulic system. the brakes may be disc type or drum type. the front brakes play a greater part in stopping the car than the rear ones, because braking throws the car weight forward on to the front wheels. many cars therefore have disc