1. DRIVE CHARACTERISTICS
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
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
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
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
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.
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