EE6703 Special Electrical Machines | Impotent  Questions
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OBJECTIVES: 

• To impart knowledge on Construction, principle of operation and performance of synchronous
reluctance motors.
• To impart knowledge on the Construction, principle of operation, control and performance of
stepping motors.
• To impart knowledge on the Construction, principle of operation, control and performance of
switched reluctance motors.
• To impart knowledge on the Construction, principle of operation, control and performance of
permanent magnet brushless D.C. motors.
• To impart knowledge on the Construction, principle of operation and performance of
permanent magnet synchronous motors.

UNIT I SYNCHRONOUS RELUCTANCE MOTORS 

Constructional features – Types – Axial and Radial flux motors – Operating principles – Variable
Reluctance Motors – Voltage and Torque Equations – Phasor diagram – performance characteristics – Applications.

UNIT II STEPPER MOTORS 

Constructional features – Principle of operation – Variable reluctance motor – Hybrid motor – Single
and multi stack configurations – Torque equations – Modes of excitation – Characteristics – Drive
circuits – Microprocessor control of stepper motors – Closed loop control-Concept of lead angle– Applications.

UNIT III SWITCHED RELUCTANCE MOTORS (SRM)

Constructional features – Rotary and Linear SRM – Principle of operation – Torque production – Steady state performance prediction- Analytical method -Power Converters and their controllers – Methods of Rotor position sensing – Sensor less operation – Characteristics and Closed loop control – Applications.

UNIT IV PERMANENT MAGNET BRUSHLESS D.C. MOTORS

Permanent Magnet materials – Minor hysteresis loop and recoil line-Magnetic Characteristics – Permeance coefficient -Principle of operation – Types – Magnetic circuit analysis – EMF and torque
equations –Commutation – Power Converter Circuits and their controllers – Motor characteristics and
control– Applications.

UNIT V PERMANENT MAGNET SYNCHRONOUS MOTORS (PMSM)

Principle of operation – Ideal PMSM – EMF and Torque equations – Armature MMF – Synchronous
Reactance – Sine wave motor with practical windings – Phasor diagram – Torque/speed

characteristics – Power controllers – Converter Volt-ampere requirements– Applications.

TOTAL : 45 PERIODS

Also check :

EE6703 Special Electrical Machines Notes – Click here to Download 

EE6703 Special Electrical Machines Questions Papers – Click here to Download 

EE6703 Special Electrical Machines 2 marks with answers – Click here to Download 

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