For which of the following applications is the three-phase induction NOT suitable?

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MPPGCL JE Electrical 28 April 2023 Shift 1 Official Paper
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  1. To drive a conveyor belt
  2. To drive a compressor
  3. To drive a turbine
  4. To drive a pump

Answer (Detailed Solution Below)

Option 3 : To drive a turbine
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Detailed Solution

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Three-Phase Induction Motors:

  • These motors operate based on electromagnetic induction, where the rotating magnetic field in the stator induces a current in the rotor, causing rotation.
  • They provide constant speed (synchronous speed minus slip) and high starting torque, making them ideal for loads like conveyor belts, compressors, and pumps.
  • A three-phase induction motor is widely used in applications requiring constant speed and high torque, such as conveyor belts, compressors, and pumps.
  • Turbines are usually prime movers, not driven loads. However, turbines are generally driven by high-speed steam, gas, or water flow, rather than by electric motors. Instead, turbines are often used to generate electricity rather than being driven by an electric motor.


Applications of Three-Phase Induction Motors:

  • Conveyor belts → Require constant-speed operation and good torque control.
  • Compressors → Used in HVAC systems, industrial air supply, and refrigeration.
  • Pumps → Common in water supply, oil refineries, and chemical industries.
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