QUERETTE, L. A.; QUERETTE, Luciana Altino.
Resumo:
his work consists of a design of the drive circuits of a classic bridge for light loads, of typical industrial application and simple standard operation. The drive motors of each of these movements required in the design are: DC-series motor bridge, three-phase cage induction motor trolley, three-phase induction motor crane. The load-lowering movement subdivides into two movements of different speeds, obtained by the actuation of the ring induction motor in a permanent regenerative brake and reverse brake. All movements are triggered by remote control buttons. The drive circuits are purely open-loop, consisting of standardized and standardized devices. In any movement the operator must find a required position. The only operating limits are given by the fine-census mechanical protection system, and by the electrical protection system. And special attention has been paid to the investigation of the existence of standards and instruction that regulated the project, whose development must be in agreement with these documents.
