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Brushless DC Motor Drives

Brushless DC Motor Drives(Trapezoidal PMAC): The cross section of a 3-phase 2 pole Brushless DC Motor Drives is shown in Fig. 7.15. It has permanent magnet rotor with wide pole…

Closed Loop Speed Control of Multi Motor Drives

Closed Loop Speed Control of Multi Motor Drives: When mechanical part of the load is of large physical dimension it becomes desirable to share the load between several motors. For…

Closed Loop Torque Control of Drives

Closed Loop Torque Control of Drives: Closed Loop Torque Control of Drives scheme of Fig. 3.4 finds application in battery operated vehicles, rail cars and electric trains. Driver presses the…

Modes of Operation of Electrical Drive

Modes of Operation of Electrical Drive: Three types of Modes of Operation of Electrical Drive: Steady-State Acceleration including starting Deceleration including stopping As we know already, steady-state operation takes place…

Converters for Electric Motors Articles

Converters for Electric Motors Articles: Electric Converter: The speed of a dc motor can be varied by varying the armature voltage or the field current, for which a variable dc…

Control of Electric Motor Articles

Control of Electric Motor Articles: Control of DC Electric Motor: A separately excited DC Electric Motor is very versatile as a variable speed motor. Its speed can be varied by…

Characteristics of Electric Motors Articles

Characteristics of Electric Motors Articles: A Simple Electric Motor: Variable speed drives in the industry employ a simple electric motor as their drive motors mainly because they enjoy several specific…

Cranes and Hoist Drives

Cranes and Hoist Drives: The Requirements of the Cranes and Hoist Drives are The motion of the crane hook is in all three dimensions. In crane drives, the acceleration and…