ThreePhase AC machines Resource 2 Threephase Cage Rotor
- Slides: 7
Three-Phase AC machines Resource 2 Three-phase Cage Rotor Induction Motors
Three-Phase AC Machines Resource 2 Three-phase Cage Rotor Induction Motors Aims 1. To understand the principle of the operation of the motor 2. To describe the construction of a cage rotor induction commercial motor 3. To understand the factors that affect the performance of the motor
Three-Phase AC Machines Resource 2 Three-phase Cage Rotor Induction Motors Objectives end ofthe thisprinciple lesson you should be able to: • At the Describe of the rotating magnetic field • Describe the principle of rotor cage induction • Describe the construction of a commercial stator • Describe the construction of a commercial cage rotor • Explain and calculate synchronous speed • Explain and calculate fractional slip • Describe the effect upon the performance of the motor by connecting the stator in star and delta • Performance simple calculations involving electrical and mechanical parameters that describe the performance of the motor • Describe the performance curve for a cage rotor induction motor
Three-Phase AC Machines Resource 2 Three-phase Cage Rotor Induction Motors Construction of Commercial Motor 1. Motor Shaft 2. Name plate 7 2 5 6 8 3. Key and Keyway 4 4. Bearings 5. Terminal Box 9 3 6. Lifting eye 7. Laminated Rotor 8. Air flow intake 9. Cooling Fan 10 1 10. Mounting base 11. Cooling fins 12. Stator coils 11 12
Three-Phase AC Machines Resource 2 Three-phase Cage Rotor Induction Motors Rotor cage Laminated steel discs Copper age rotator bars Embedded within laminated Steel discs Copper end ring The complete rotor assembly Shaft
Three-Phase AC Machines Resource 2 Three-phase Cage Rotor Induction Motors Stator Made of laminated iron slotted rings Slots insulated with Mylar sheet Coils inserted into slots
Three-Phase AC Machines Resource 2 Three-phase Cage Rotor Induction Motors Stator coil connections 2. Construction of Commercial Motor STAR Link A’ , B’ and C’ DELTA Link A’ with B, B’ with C and C’ with A
