Various Pilot Devices in Motor Control: Motor control devices may be classified as primary control devices and pilot control devices. Pilot devices control the primary control devices which in turn…
Magnetic Amplifier - Working Principle and Applications: In a magnetic amplifier, the basic component is a steel-cored coil with an additional winding energized by direct current. It is intended for…
Thyristorised Control of DC Electric Traction Motor: The modern trend is towards the use of dc motors (both separately excited and dc series motors) equipped with thyristor chopper control. The…
What is Metadyne Control? - Construction, Working and Applications: The metadyne control system is based on constant current system of speed control. In resistance control or series- parallel control a…
Series Parallel Controller with Reversing Drum: A Series Parallel Controller with Reversing Drum (with shunt transition) for two series motors is shown in Fig. 13.11. In addition to its primary…
What is Transition Method in Electric Traction? The methods of changing-over the connections from one grouping to another are known as transition method. The change-over from full series (when the…
Starting and Speed Control of DC Traction Motors: Starting and Speed Control of DC Traction Motors - As already discussed, only series and compound dc motors are suitable for traction…
Negative Booster in Electric Traction: In case of dc traction system, return current flows through the rails, to the substations. So due to this current flow through rails some voltage…