Rotor bars, caged

Fig. 6.M0 Diagram of an impact mill with hinged or fixed hammers on a horizontal rotor and discharge restriction (bar cage or screen) to avoid oversized particles in the product a) grate bars, b) cage with axially elongated holes, c) cage with round holes...

There are two types of induction motor rotor - the wound rotor and the cage rotor. The cage rotor consists of a laminated cylinder of silicon steel with copper or aluminium bars slotted in holes around the circumference and short-circuited at each end of the cylinder, as shown in Fig. 2.50. In small motors the rotor is cast in aluminium. Better starting and quieter running are achieved if the bars are slightly skewed. This type of rotor is extremely robust and since there are no... 

The rotor is squirrel cage with short-circuited copper rings at the ends. Here also, to vary the starting characteristics of the motor, the skin effect is used by providing deep bars, flat bars, tapered bars or other types of slots (discussed in Section 2.3). 

This stationary part of the motor includes the iron, coils, and magnetic circuit and is called the stator. The rotor, or squirrel cage, is a number of bars all connected together. 

Squirrel Cage Motors - This is another name for an induction motor. The motors consist of a rotor inside a stator. The rotor has laminated, thin flat steel discs, stacked with channels along the length. If the casting composed of bars and attached end rings were viewed without the laminations the casting would appear similar to a squirrel cage. 

Squirrel cage A term used to describe the construction of one type of induction motor. The rotor is made of an iron core mounted on a concentric shaft. Copper, brass, or aluminum bars run the entire length of the core in slots on the core. These bars act as conductors and are fas-... 

---