It is an electric motor model that has important features and functionality as an excellent start and a low-intensity starting current which, by the way, has a value of one and a half compared to the rated current.
This type of motor CR20IP1 is characterized by high touch of starting and speed control. On the other hand has need rheostat of great power, and require more maintenance than the rotor squirrel cage induction motors.
This, in turn, is very efficient and does not require many maintenance care. The question speed regulation and reversing, are carried out by moving a set of brushes, it causes a variation in the induced voltage in the rotor windings.
The three-phase induction motor is recognized by the laminate collector and is much used in situations which are necessary to give starting under heavy loads, for example, elevators, calenders.