working principle

1. Hybrid Stepper
Motors
Presented By:
PAVITHRAN (1200782)

2. Hybrid Stepper Motor
• Principles of the permanent magnet and variable reluctance
stepper motor.
• Rotor flux is produced by the permanent magnet and directed
by the rotor teeth to appropriate parts of the airgap.
• The permanent magnet is placed in the middle of rotor and
magnetized in axial direction.

3. Schematic Arrangement of Hybrid
Stepper Motor
construction
Working of a hybrid motor

4. PrincipleOperationof HybridStepper
Motors
• When phase A carries positive current ,stator poles 1 & 5 becomes
south and 3 & 7 become north.
• When phase A is denergized and phase B is excited, rotor will move
by one quarter of tooth pitch.
• Torque in hybrid motor is produced by interaction of the rotor &
stator fluxes.
• Rotor field remains constant as it is produced by the permanent
magnet.

5. Advantages Of The HybridStepperMotor
• Very small step angles up to 1.8º.
• Higher torque per unit volume which is more than in case of
variable reluctance motor.
• Due to the permanent magnet, the motor has some detent
torque which is absent in variable reluctance motor.