Electric Motors and Drives

Part 1 Electric motors: producing rotation; magnetic circuits; torque production; specific loadings and specific output; motional EMF; general properties of electric motors. Part 2 Power electronic converters for motor drives: voltage control - DC output from DC supply; DC from AC - controlled rectification; AC from DC inversion; converter waveforms and acoustic noise; cooling of power switching devices. Part 3 Conventional DC motors: torque production; DC motor - steady-state characteristics; transient behaviour - current surges; shunt, series and compound motors; four quadrant operation and regenerative braking. Part 4 DC motor drives: thyristor DC drives; control arrangements for DC drives; chopper-fed DC motor drives; developments in industrial DC drives; DC servo drives. Part 5 induction motors - rotating field, slip and torque: the rotating magnetic field; torque production; influence of rotor current on flux; stator current-speed characteristics. Part 6 Operating characteristics of induction motors: methods of starting cage motors; run-up stable operating regions; torque-speed curves - influence of rotor parameters; influence of supply voltage on torque-speed curve; generating and braking; speed control; power-faced control and energy optimisation; single-phase induction motors. Part 7 Inverter-fed induction motor drives: torque-speed characteristics - constant V/f operation; control arrangements for inverter-fed drives. Part 8 Stepping motor systems: principle of motor operation; motor characteristics; drive circuits and steady-state characteristics; transient performance. Part 9 Synchronous, switched reluctance and brushless DC drives: synchronous motors; controlled-speed synchronous motor drives; switched reluctance motor drives; brushless DC motors. Part 10 Motor/drive selection: power range for motors and drives; load requirements - torque-speed characteristics; general application considerations.