Slip Ring Rotor Construction

The slip ring induction motor is shown in the figure below.

Slip ring rotor construction.

Instead of bars in this motor three windings are used. The another name of the squirrel cage motor is cage motor. However the rotor construction of the slip ring motor is quite interesting. Slip ring rotor or wound rotor or phase wound rotor.

The working principles and stator construction of the slip ring induction motor are exactly the same as that of the squirrel cage motor. In this article we shall discuss this motor s construction working speed control advantages disadvantages and applications. The main difference between slip ring induction motor is in rotor construction and usage. The stator has three phase winding on it.

The below diagram shows a squirrel cage. Because of various advantages like low initial current high starting torque and improved power factor it is used in applications that require high torque cranes and elevators. The phase wound rotor is also called as slip ring rotor. Slip ring induction motor is one of the types of 3 phase induction motor and is a wound rotor motor type.

The main difference in a slip ring induction motor is on the rotor construction and usage. It consists of a cylindrical core which is laminated. The rotor windings are connected in star. Every motor has main two parts.

The construction of slip ring induction motor is same as other induction motors. The slip ring motor is also called phase wound rotor. These motors have the advantage of adopting any number of pole pairs. The construction of the slip ring motor is complicated because it consists slip ring and brushes whereas the construction of the squirrel cage motor is simple.

This rings attached with high resistance acts as an external circuit for the rotor. The stator of slip ring induction motor is very much the same as that of the squirrel cage induction motor but the construction of its rotor is very much different stator winding can be either star or delta connected depending upon the design. The absence of slip ring and brushes make the construction of squirrel cage three phase induction motor very simple and robust and hence widely used three phase induction motor. Some changes in the stator may be encountered when a slip ring motor is used in a cascaded system as the supply for the slave motor is controlled by the supply from the rotor of the other slip ring motor with external resistance mounted on its rotor.

The outer periphery of the rotor has a semi closed slot which carries a 3 phase insulated windings. Slip ring induction motor construction. What is slip ring induction motor. To overcome this problem the slip ring induction motor comes into the picture.