UNIT II: INDUCTION MOTORS (ASYNCHRONOUS) |
II-1 Three-phase induction machine
Construction characteristics. Operating principles. Electrical equivalent circuit. Powers and torques. Electrical tests. Energy balance and efficiency. T-s curve. Operation modes. Starting methods and speed control.
AC motor protection and control switchgear.
Security oriented control circuits
Security oriented protection schemes
II-2 Single-phase induction motor
Construction characteristics. Operating principles. Electrical equivalent circuit. Starting methods. |
UNIT IV: D.C. MOTORS. SPECIAL MACHINES |
IV-1 Classic D.C. motor: Construction characteristics. Operating principles. Excitation systems. Armature reaction. Commutation. Speed control. Nameplate information.
IV-2 Special machines: BLDC, Stepper Motors. |