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Which of the following finds applications in speed control of a DC motor?

  • SCR finds applications in speed control of a DC motor.
  • SCRs are often used in DC motor speed control applications because they can handle high current and voltage levels, and can switch the current on and off rapidly.
  • By controlling the firing angle of the SCR, the amount of DC voltage applied to the motor can be controlled, thereby controlling the motor speed.
  • One common method of SCR-based DC motor speed control is known as phase-angle control.
  • This technique involves controlling the duration of the current flow to the motor by controlling the phase angle of the AC input voltage applied to the SCR.
  • By adjusting the phase angle, the amount of DC voltage applied to the motor can be controlled, and hence the motor speed can be varied.