Which of the following best describes a squirrel-cage induction motor?

Which of the following best describes a squirrel-cage induction motor?

• A. A motor with brushes for commutation
• B. A type of AC motor with a rotor that consists of conductive bars
• C. A motor that operates on direct current
• D. A motor specifically designed for high-speed applications

Answer: (B)

A squirrel-cage induction motor is best described as a type of alternating current (AC) motor that features a rotor made up of conductive bars. This rotor design consists of aluminum or copper bars shorted at both ends by end rings, forming a structure that resembles a squirrel cage. The operation of this motor relies on electromagnetic induction; when alternating current flows through the stator winding, it creates a rotating magnetic field. This field induces a current in the conductive bars of the rotor, allowing it to turn and produce torque. This specific construction is significant because it maximizes efficiency and reduces maintenance needs. Unlike motors with brushes for commutation or designs that operate solely on direct current, squirrel-cage induction motors are known for their robustness and ability to handle various operational conditions without the wear and tear associated with brush mechanisms. Additionally, while some motors may be designed for high-speed applications, the squirrel-cage induction motor is versatile and can be used in a wide range of applications from low to medium speeds, making it a popular choice in industrial settings.

A squirrel-cage induction motor is best described as a type of alternating current (AC) motor that features a rotor made up of conductive bars. This rotor design consists of aluminum or copper bars shorted at both ends by end rings, forming a structure that resembles a squirrel cage. The operation of this motor relies on electromagnetic induction; when alternating current flows through the stator winding, it creates a rotating magnetic field. This field induces a current in the conductive bars of the rotor, allowing it to turn and produce torque.

This specific construction is significant because it maximizes efficiency and reduces maintenance needs. Unlike motors with brushes for commutation or designs that operate solely on direct current, squirrel-cage induction motors are known for their robustness and ability to handle various operational conditions without the wear and tear associated with brush mechanisms. Additionally, while some motors may be designed for high-speed applications, the squirrel-cage induction motor is versatile and can be used in a wide range of applications from low to medium speeds, making it a popular choice in industrial settings.