EX-802 (B) · Special Machine/Official Syllabus
Special Machine (EX-802 (B)) - Official Syllabus
1
Unit 1
Stepper Motors
- Discretisation of angular position by stepper structures
- stepping angle and frequency of excitation
- VR and PM rotor structures and their torque production
- torque angle characteristics
- The hybrid structure and torque production by permanent magnet and excitation fluxes
- Power electronic converters for stepper motors
- control by load angle
2
Unit 2
Switched reluctance motor
- static torque production
- partition of energy and the effects of saturation
- Dynamic torque production
- torque speed characteristics
- shaft position sensing
- solid rotors
3
Unit 3
BrushLess DC Motor
- BrushLess DC Motor construction and principle
- speed control
- basic concept of torque
- outer and inner rotor
- magnetic circuit concept
- electrical analogy
- winding pattern series and parallel
- Thermal consideration
4
Unit 4
Permanent magnet materials and circuits
- Permanent magnet materials and circuits
- Characteristics, parameters, properties
- classification and calculations
- Permanent magnet motors, D.C. brushed motors
- design analysis and control and applications
5
Unit 5
PM synchronous motors
- rotor construction
- theory, operation
- control and applications
- PM step motors, hybrid step motors
- sensorless control
- reduction of torque pulsations
- Case studies such electric vehicles, industrial drives, PV fed water pumping
Reference Books
- Brushless Permanent Magnet & Reluctance Motor Drives — T. J. E. Miller
- Principles of Electric Machines & Power Electronics — P. C. Sen
- Electric Drives — G. K. Dubey
- Permanent magnet synchronous & brushless DC motor drives — R. Krishnan
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