Crane has an electro-mechanical emergency brake, which holds the load in the event of a power failure. But our customer wants increased passive safety similar to autoexcited DC motors passive braking (not hold, but slow the load).
We have to make some electrical engineering changes in a portal crane. The best solution in terms of efficiency, manteinance, etc, involves using AC motors. The question is, is there any commercial AC system capable to provide dynamic braking (to dissipating resistors) in the event of a complete...
