Our article all about induction motors explains the specifications for all types of induction motors and is a good place to see all the different induction motor characteristics. This article will focus on what needs to be specified for squirrel cage induction motors, which involves phase, speed, torque, and current.

The construction of squirrel cage induction simple and rugged. Construction of slip ring induction motors needs slip rings, brushes, short-circuiting device, etc. This type of motor has less overhang and better space factor in slots. These motors have the highest overhang and poor space factor in slots. Cost and maintenance are less.

One big advantage of a squirrel cage motor is how easily you can change its speed-torque characteristics. This can be done by simply adjusting the shape of the bars in the rotor.

08/01/  · In squirrel cage induction motor starting torque is very low. The speed of the rotor will depend on the AC power, and the speed can be controlled by changing the input supply

Starting Characteristics of Squirrel Cage Induction Motors. Soft start is also available using solid-state controls. Consult manufacturer for voltage, current and torque rating. *Autotransformer magnetizing current not included. Magnetizing current is usually less than 25 percent of motor full-load current.

In a double-cage induction motor, it is assumed that the two cages develop two separate torques. Thus, the total torque developed in the double-cage induction motor is equal to the sum of the two cage torques. The torque-slip characteristics of the two cages and the total torque of the motor is shown in the figure.

The torque-speed characteristics of the outer cage, inner cage, and double cage induction motor (Resultant torque) are shown in Fig. 2 separately. Fig. 2: Torque-speed characteristics. Advantages of Double Squirrel Cage Induction Motor It reduces the starting current. It increases the starting torque.

The full-load speed is a function of the motor design and power and is usually in the range of 94–99% of the synchronous speed; the difference is the “slip.” 

Speed Control of Three Phase Squirrel Cage Induction Motor Author: Athul S Chandran, Akhil G Augustine, Alvin Valantine, Bibi Banerji Subject: IJERT.COM - International Journal of Engineering Research and Technology Keywords: Speed,Control,of,Three,Phase,Squirrel,Cage,Induction,Motor Created Date: 7/13/ 3:53:00 PM

The principal advantages of the squirrel-cage induction motor are its simplicity of design and robust construction. Its torque/speed and current/speed characteristics are such that, on

for the intended application. The speed-torque curve will allow the user to determine if the motor has enough starting torque to overcome friction, to accelerate the load to full running speed, and if it can handle the maximum overload expected. See Figure 9 for a typical speed-torque curve. Figure 9. Typical Motor Speed-Torque Curve