Arquivos Mensais: outubro 2017

Control of Electric Motors

In general, in some specific applications there is a need for rapid deceleration of the motor as well as the load. When the power line motor is switched off, it is important that a rotating reversing member is used while the motor is still running. The shutdown or shutdown of the mains motor is effected through a relay, preventing it from starting in the opposite direction. In the case of synchronous motors dynamic braking can be employed.

Most of the engines found, except for some types, such as single-phase motors such as shaded pole and repulsion motors, for example, have the possibility of being used in both directions of rotation, varying only from a control considered adequate. The main functions performed by the control of an electric motor are starting, stopping, direction of rotation, speed regulation, starting current limitation, mechanical protection and electrical protection, among others. An engine can only start its spin at the instant at which the moment of load to be overcome, when stopped, is less than its starting torque.