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6.1 Name TWO parts of a stator with reference to induction motors - NSC Electrical Technology Power Systems - Question 6 - 2023 - Paper 1
Question 6
6.1 Name TWO parts of a stator with reference to induction motors. 6.2 FIGURE 6.2 below shows the name plate of an induction motor. Answer the questions that follow... show full transcript
Worked Solution & Example Answer:6.1 Name TWO parts of a stator with reference to induction motors - NSC Electrical Technology Power Systems - Question 6 - 2023 - Paper 1
Step 1
Name TWO parts of a stator with reference to induction motors.
Answer
The two parts of a stator in an induction motor are the
- Stator Windings: These are the coils of wire wrapped around the stator core that create a magnetic field when current flows through them.
- Stator Core: This is the laminated iron structure that houses the stator windings and helps to improve the efficiency of the motor by providing a path for the magnetic field.
Step 2
Motivate why this nameplate belongs to a three-phase motor.
Answer
The nameplate indicates that the supply voltage is 400 V, which is a standard value for three-phase systems. Moreover, three-phase motors are designed to operate with three-phase AC supply, and this voltage level suggests that it is indeed using such a system.
Step 3
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Step 6
Explain how power in a three-phase induction motor is transferred from the stator to the rotor.
Answer
In a three-phase induction motor, power transfer occurs via electromagnetic induction. When a three-phase supply is connected to the motor, it generates a rotating magnetic field in the stator. This magnetic field induces a current in the rotor's conductors, producing its own magnetic field. The interaction between the stator's rotating magnetic field and the rotor's magnetic field generates torque, which turns the rotor, thereby converting electrical energy into mechanical energy.