Type of traction motors used in Delhi metro?

Delhi Metro uses two types of traction motors in its trains:

* Three-phase induction motors: These are the most common type of traction motor used in electric trains around the world. They are relatively simple and reliable, and can provide a high level of torque.

* Permanent magnet synchronous motors: These are a more recent type of traction motor that is becoming increasingly popular due to their high efficiency and reliability. They use permanent magnets instead of electromagnets to generate torque, which eliminates the need for a separate excitation system.

The Delhi Metro uses both three-phase induction motors and permanent magnet synchronous motors in its trains, depending on the train type and the route it is used on.