This ppt contains introduction to stepper motor and its types and the mode of operation of the stepper motor. This ppt consists of mainly diagrams and few theory.

1. Stepper Motor
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2. Real Images
Used in Dot Matrix Printer Used in CD-ROM Drive
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3. Types of Stepper Motor
• Variable Reluctance SM
• Permanent Magnet SM
• Hybrid SM
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4. Variable Reluctance Stepper Motor
MODES OF OPERATION
 1 Phase ON
 2 Phase ON
 Half Step Operation
 Microstepping
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5. VRSM – 1 Phase ON Mode
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6. VRSM- 2 Phase ON Mode
 2 stator energized simultaneously
 AB, BC, CA, AB
 Equilibrium position is in between
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7. VRSM – Half Step Operation
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8. VRSM- Microstepping
• 2 phase ON mode
• 2 unequal current
• Very fine Resolution
• Used for smooth low speed operation with
high resolution
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9. Permanent Magnet Stepper Motor
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10. Hybrid Stepper Motor
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11. APPLICATION
• Printers, Plotters
• Robotics
• Automotive
• Commercial
• Military
• Medical Applications

12. THANK YOU
References:
Textbook of Electrical Technology, BL Theraja, AK Theraja; S Chand
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