Question

Secondary of the linear induction motor consists of a:
1. flat aluminium conductor with a ferromagnetic core
2. flat copper conductor with a ferromagnetic core
3. flat copper conductor
4. flat iron conductor

Answer 1

Correct Answer - Option 1 : flat aluminium conductor with a ferromagnetic core

Linear Induction Motor:

• A Linear Induction Motor (LIM) is an advanced version of rotary induction motor which gives a linear translational motion instead of rotational motion.
• The stator is cut axially and spread out flat. In this type of motor, the stator and rotor are called primary and secondary respectively.
• The secondary of the linear induction motor consists of a flat aluminium conductor with a ferromagnetic core.
• If a rotary induction motor is compared with the linear induction motor, the LIM requires a larger air gap and hence, the magnetizing current is greater and the power factor and efficiency of the motor are lower.

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​Applications of the Linear Induction Motor:

• The main application of the LIM is in transportation and in the electric traction system. The primary is mounted on the vehicle and the secondary is laid on the track.
• It is used in the cranes
• Pumping of liquid metals
• Actuators for the movement of doors
• Used in High voltage circuit breakers and also in accelerators.