ELECTRIC DRIVESThis book provides a comprehensive introduction to the fundamental concepts of electric drives and is eminently suited as a textbook for B.E./B.Tech., AMIE and diploma courses in electrical engineering. It can also be used most effectively by all those preparing for GATE and UPSC competitive examinations, as well as by practising engineers. The topics, which range from principles and techniques to industrial applications, include characteristic features of drives, methods of braking and speed control, electromagnetic and solid state control of motors, motor ratings, transients in drive systems, and operation of stepper motors. |
Contents
| 8 | |
SPEED CONTROL OF DC MOTORS | 60 |
Software for the Controller | 106 |
Problems | 116 |
5 | 138 |
Problems | 164 |
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Common terms and phrases
armature circuit armature current braking torque bridge rectifier cage induction motor capacitors chopper connected contactor converter copper loss counter current braking curve cycloconverter dc motor dc series motor dc shunt motor delay angle diagram diodes dynamic braking electric drives energy loss equation external resistance field current field resistance flux frequency full-load gear induction motor inertia inverter load torque machine magnetic maximum torque moment of inertia motor drive motor speed N₁ N₂ operation output voltage P₁ P₂ phase plugging poles power factor quadrant R₁ R₂ rad/s rated ratio regenerative braking relay reverse rheostatic rotation rotor circuit rotor resistance separately excited shaft shown in Fig single-phase slip slip-ring induction motor speed control speed-torque characteristics starter starting stator stepper motor switch synchronous motor synchronous speed T₁ T₂ temperature rise three-phase thyristor traction transistors variable waveforms x₁ zero