Stepper Motor

1. STEPPER
MOTOR
3/16/2018 QUEST | NAWABSHAH | PAKISTAN 1

2. A brushless DC electric
motor that divides a full
rotation into a number of
equal steps.
STEPPER
MOTOR
3/16/2018 QUEST | NAWABSHAH | PAKISTAN 15-EL-40 2

3. STEPPER
MOTOR
A brushless, synchronous
electric motor that converts
digital pulses into mechanical
shaft.
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4. STEPPER
MOTOR
It is the “digital” version of
the electric motor.
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5. STEPPER
MOTOR
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6. STEPPER
MOTOR
BASIC CONSTRUCTION
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7. STEPPER
MOTOR
OPERATION
 The unique feature of a stepper motor is that its
output shaft rotates in a series of discrete angular
intervals or steps.
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8. STEPPER
MOTOR
TYPES
Permanent Magnet Stepper
motor
Variable Reluctance Stepper
motor
Hybrid Magnet Stepper motor
3/16/2018 QUEST | NAWABSHAH | PAKISTAN 15-EL-40 8

9. STEPPER
MOTOR
PERMANENT MAGNET
STEPPER MOTOR
Magnetized rotor.
Greater resolution as pole
pairs increase or “additional
phases”.
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10. STEPPER
MOTOR
VARIABLE RELUCTANCE
STEPPER MOTOR Non-magnetic rotor.
Greater resolution as more
teeth are added.
Normally have three or five
stator windings that energized
one at a time.
3/16/2018 QUEST | NAWABSHAH | PAKISTAN 15-EL-40 10

11. STEPPER
MOTOR
HYBRID MAGNET
STEPPER MOTOR Hybrid magnet stepper motor
has the characteristics of both
permanent magnet and variable
reluctance.
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12. STEPPER
MOTOR
STEPPING SEQUENCE
Wave Drive Sequence
Full Step Sequence
Half Step Sequence
Micro Stepping Sequence
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13. STEPPER
MOTOR
STEPPER MOTOR DRIVES
Receives step and direction
signals from a control system,
typically a computer and
converts them into electronic
signals which run the stepper
motor.
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14. The speed and torque of a
stepper motor is determined by
the flow of current from the
stepping motor driver to the
stepping motor winding.
STEPPER
MOTOR
STEPPER MOTOR DRIVES
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15. Most stepper motor driver
circuits are designed to supply a
greater amount of voltage than
the stepper motor’s voltage.
STEPPER
MOTOR
STEPPER MOTOR DRIVES
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16. Provides precise positioning
and repeatability of movement.
Energized stepper motor
maintains full torque at standstill
position.
Low cost for control achieved
Simplicity of construction
STEPPER
MOTOR
ADVANTAGES
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17. Require a dedicated control
circuit
Use more current than DC
motor
Torque reduces at higher
speeds
Resonances can occur if not
properly controlled
Not easy to operate at
extremely high speeds
STEPPER
MOTOR
DISADVANTAGES
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18. Floppy disk drives
Flatbed scanners
Computer printers
Plotters
Slot machines
Image scanners
Compact disc drives
Intelligent lighting
STEPPER
MOTOR
APPLICATIONS
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19. THANK
S
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