41. Bearing currents can be interrupted by installation of insulated bearings and specially designed electrostatic-shielded induction motors . 42. Induction motors may be further divided into Squirrel Cage Induction Motors and Wound Rotor Induction Motors . 43. This is commonly used for controlling the speed of induction motors , dimming lamps, and controlling electric heaters. 44. The electric motors utilize permanent magnets which have a higher efficiency than standard high speed induction motors . 45. The company was the first to use Linear Induction Motors ( LIMs ) on their roller coasters. 46. Launch lift hills use mostly linear synchronous motors or linear induction motors but sometimes use drive tires. 47. The original motors were Allis-Chalmers induction motors . 48. A single phase induction motor requires separate starting circuitry to provide a rotating field to the motor. 49. This maglev line specifically utilizes electromagnetic suspension ( EMS ) and linear induction motor ( LIM ) propulsion. 50. See Linear induction motor # Uses.
