EE8353 – NOTES & QP
EE8353 – SYLLABUS
UNIT I INTRODUCTION
Basic Elements — Types of Electric Drives — factors influencing the choice of electrical drives — heating and cooling curves — Loading conditions and classes of duty — Selection of power rating for drive motors with regard to thermal overloading and Load variation factors
UNIT II DRIVE MOTOR CHARACTERISTICS
Mechanical characteristics — Speed-Torque characteristics of various types of load and drive motors — Braking of Electrical motors — DC motors: Shunt, series and compound — single phase and three phase induction motors.
UNIT III STARTING METHODS
Types of D.C Motor starters — Typical control circuits for shunt and series motors — Three phase squirrel cage and slip ring induction motors.
UNIT IV CONVENTIONAL AND SOLID STATE SPEED CONTROL OF D.C. DRIVES
Speed control of DC series and shunt motors — Armature and field control, Ward-Leonard control system — Using controlled rectifiers and DC choppers –applications.
UNIT V CONVENTIONAL AND SOLID STATE SPEED CONTROL OF A.C. DRIVES
Speed control of three phase induction motor — Voltage control, voltage / frequency control, slip power recovery scheme — Using inverters and AC voltage regulators — applications.