EE 1351 SOLID STATE DRIVES 3 0 0 100

AIM

To study and understand the operation of electric drives controlled from a power

electronic converter and to introduce the design concepts of controllers.

OBJECTIVES

i. To understand the stable steady-state operation and transient dynamics of a motor-load system.

ii. To study and analyze the operation of the converter / chopper fed dc drive and to solve simple problems.

iii. To study and understand the operation of both classical and modern induction motor drives.

iv. To understand the differences between synchronous motor drive and

induction motor drive and to learn the basics of permanent magnet synchronous motor drives.

v. To analyze and design the current and speed controllers for a closed loop solid-state d.c motor drive.

1. DRIVE CHARACTERISTICS 9

Equations governing motor load dynamics - Equilibrium operating point and its steady state stability - Mathematical condition for steady state stability and problems - Multi quadrant dynamics in the speed torque plane - Basics of regenerative braking - Typical load torque characteristics - Acceleration, deceleration, starting and stopping.

2. CONVERTER / CHOPPER FED DC MOTOR DRIVE 9

Steady state analysis of the single and three phase fully controlled converter fed separately excited D.C motor drive: Continuous and discontinuous conduction mode - Chopper fed D.C drive: Time ratio control and current limit control - Operation of four quadrant chopper.

3. INDUCTION MOTOR DRIVES 9

Stator voltage control - Slip-power recovery drives - Adjustable frequency drives: v/f control, constant slip-speed control and constant air-gap flux control – Basics of voltage/current fed inverters - Block diagram of closed loop drive.

4. SYNCHRONOUS MOTOR DRIVES 9

Open loop volts/hertz control and self-control of synchronous motor: Marginal angle control and power factor control - Permanent magnet synchronous motor.

5. DESIGN OF CONTROLLERS FOR DRIVES 9

Transfer function for dc motor, load and converter – Closed loop control with current and speed feedback - Armature voltage control and field weakening mode control - Design of controllers: Current controller and speed controller - Converter selection and characteristics.

TEXT BOOKS

1. R. Krishnan, ‘Electric Motor & Drives: Modelling, Analysis and Control’, Prentice Hall of India, 2001.

2. Bimal K. Bose. ‘Modern Power Electronics and AC Drives’, Pearson Education, 2002.

REFERENCE BOOKS

1. G.K. Dubey, ‘Power Semi-conductor Controlled Drives’, Prentice Hall of India, 1989.

2. S.K. Pillai, ‘A First Course on Electrical Drives’, Wiley Eastern Limited, 1993.

AIM

To study and understand the operation of electric drives controlled from a power

electronic converter and to introduce the design concepts of controllers.

OBJECTIVES

i. To understand the stable steady-state operation and transient dynamics of a motor-load system.

ii. To study and analyze the operation of the converter / chopper fed dc drive and to solve simple problems.

iii. To study and understand the operation of both classical and modern induction motor drives.

iv. To understand the differences between synchronous motor drive and

induction motor drive and to learn the basics of permanent magnet synchronous motor drives.

v. To analyze and design the current and speed controllers for a closed loop solid-state d.c motor drive.

1. DRIVE CHARACTERISTICS 9

Equations governing motor load dynamics - Equilibrium operating point and its steady state stability - Mathematical condition for steady state stability and problems - Multi quadrant dynamics in the speed torque plane - Basics of regenerative braking - Typical load torque characteristics - Acceleration, deceleration, starting and stopping.

2. CONVERTER / CHOPPER FED DC MOTOR DRIVE 9

Steady state analysis of the single and three phase fully controlled converter fed separately excited D.C motor drive: Continuous and discontinuous conduction mode - Chopper fed D.C drive: Time ratio control and current limit control - Operation of four quadrant chopper.

3. INDUCTION MOTOR DRIVES 9

Stator voltage control - Slip-power recovery drives - Adjustable frequency drives: v/f control, constant slip-speed control and constant air-gap flux control – Basics of voltage/current fed inverters - Block diagram of closed loop drive.

4. SYNCHRONOUS MOTOR DRIVES 9

Open loop volts/hertz control and self-control of synchronous motor: Marginal angle control and power factor control - Permanent magnet synchronous motor.

5. DESIGN OF CONTROLLERS FOR DRIVES 9

Transfer function for dc motor, load and converter – Closed loop control with current and speed feedback - Armature voltage control and field weakening mode control - Design of controllers: Current controller and speed controller - Converter selection and characteristics.

TEXT BOOKS

1. R. Krishnan, ‘Electric Motor & Drives: Modelling, Analysis and Control’, Prentice Hall of India, 2001.

2. Bimal K. Bose. ‘Modern Power Electronics and AC Drives’, Pearson Education, 2002.

REFERENCE BOOKS

1. G.K. Dubey, ‘Power Semi-conductor Controlled Drives’, Prentice Hall of India, 1989.

2. S.K. Pillai, ‘A First Course on Electrical Drives’, Wiley Eastern Limited, 1993.

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