For what purpose is the variable resistance...

Question 1 / 2707066636ef128f7522a1c523157

Question 1 of 2707066636ef128f7522a1c523157

For what purpose is the variable resistance placed in the rotor circuit of a wound-rotor induction motor provided?

Question 1 of 27070

For what purpose is the variable resistance placed in the rotor circuit of a wound-rotor induction motor provided?

🔍 Key Concepts

• Wound-rotor induction motor basics: how the rotor circuit affects performance • Effect of adding resistance in the rotor circuit on torque–speed characteristics • Which electrical quantity (speed, voltage, frequency, vibration) is directly influenced by rotor resistance

💭 Think About

• If you increase resistance in the rotor circuit, what happens to the slip and the operating speed of the motor under load? • Does changing rotor resistance directly change supply voltage or supply frequency, or does it mainly change how the motor operates at a given supply? • Which of the options is commonly adjusted in industrial wound-rotor motors by inserting external resistors in the rotor circuit?

✅ Before You Answer

• Remember that supply frequency is set by the power system, not by the rotor circuit. • Ask yourself which parameter’s control method is traditionally tied to external resistors in wound-rotor motors. • Be sure you know the definition of slip and how rotor resistance alters the slip at which maximum torque occurs.

Question 1 of 27070

For what purpose is the variable resistance placed in the rotor circuit of a wound-rotor induction motor provided?

vibration control

frequency control

voltage control

speed control