EE3009 SPECIAL ELECTRICAL MACHINES (SEM)

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S.Santhosh (Admin)
Important questions
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UNIT -1

1.Constrcution and principle of stepper motor

2.Closed loop control of stepper motor
3.Torque equation of Stepper motor

UNIT-2

1.Construction and working principle of Switched reluctance motor(SRM)

2.Torque equation of SRM,control of SRM

3.Sensor less operation of SRM,Apps.

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UNIT-3

1.Emf & Torque equation of PMBLDC motor
2.Construction and working principle of PMBLDC motor
3.!80 &120 modes of operation

UNIT-4

1.Torque,EMF equation of PMSM

2.Construction and working principle of Permanent magnet synchronous motor

3.Microcontroller based PMSM

UNIT-5

1.Principle,Characteristics of Hysteresis motor

2.Synchronous Reluctance Motor

3.Repulsion motor RAre

**Very important questions are bolded and may be asked based on this topic

PART-C

1.Compulsory Questions {a case study where the student will have to read and analyse the subject }

mostly asked from unit (OR) a Problem given

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SYllabuS

UNIT I STEPPER MOTORS

Constructional features –Principle of operation –Types – Torque predictions – Linear Analysis – Characteristics – Drive circuits – Closed loop control – Concept of lead angle - Applications.

UNIT II SWITCHED RELUCTANCE MOTORS (SRM)

Constructional features –Principle of operation- Torque prediction–Characteristics Steady state performance prediction – Analytical Method – Power controllers – Control of SRM drive- Sensor less operation of SRM – Applications.

UNIT III PERMANENT MAGNET BRUSHLESS D.C. MOTORS

Fundamentals of Permanent Magnets- Types- Principle of operation- Magnetic circuit analysis- EMF and Torque equations- Power Converter Circuits and their controllers - Characteristics and control- Applications.

UNIT IV PERMANENT MAGNET SYNCHRONOUS MOTORS (PMSM)

Constructional features -Principle of operation – EMF and Torque equations - Sine wave motor with practical windings - Phasor diagram - Power controllers – performance characteristics -Digital controllers – Applications.

UNIT V OTHER SPECIAL MACHINES

Constructional features – Principle of operation and Characteristics of Hysteresis motor- Synchronous Reluctance Motor–Linear Induction motor-Repulsion motor- Applications.

EE3009 SPECIAL ELECTRICAL MACHINES (SEM)