In this slide working principle of reluctance motor is described, its starting, torque and power relation are described

1. Reluctance Motor
Created By:
Bassit A. Golra
Tuesday, February 27, 2018 1

2. Synchronous Motor
Tuesday, February 27, 2018 2

3. STARTING SYNCHRONOUS MOTORS
• Development of a unidirectional torque with
syn. motor amortisseur windings
Tuesday, February 27, 2018 3

4. Induction Motor
Tuesday, February 27, 2018 4

5. Tuesday, February 27, 2018 5

6. Questions?
What is Magnetic Reluctance?
Tuesday, February 27, 2018 6

7. Reluctance Motor
• An induction motor with a modified rotor
– Single-phase or Three-phase
– rotor turns in synchronism with the rotating
magnetic flux
Tuesday, February 27, 2018 7

8. Reluctance Motor
• It is a motor which depends on reluctance
torque for its operation.
• Reluctance torque is the torque induced in an
iron object in the presence of external
magnetic field.
Tuesday, February 27, 2018 8

9. Construction..
Tuesday, February 27, 2018 9

10. Operation
• Torque applied to the rotor is proportional to
Sin2δ (δ is electrical angle between the rotor
and the stator magnetic fields)
• Maximum angle will be 45˚.
Tuesday, February 27, 2018 10

11. Operation
Tuesday, February 27, 2018 11

12. Starting
• Like a normal Synchronous motor, it has no
starting torque and will not start by itself.
• It start like an induction motor and for better
starting torque we use auxiliary windings.
Tuesday, February 27, 2018 12

13. Torque and Speed Characteristic
• It start like an induction
motor and work like a
synchronous motor.
• Therefore it is also
known “induction-
synchronous” motor.
• The starting torque is
highly dependent on
the position of the
rotor.
Tuesday, February 27, 2018 13

14. Applications
• Analog electric meters.
• Washing machine.
• Hard disk drive motor.
• Sewing Machine
motor.
Tuesday, February 27, 2018 14

15. Thanks!!!
Tuesday, February 27, 2018 15