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DC motors were the first form of motors to be widely used, as they could be powered from existing direct-current lighting power distribution systems. A DC motor's speed can be controlled over a wide range, using either a variable supply voltage or by changing the strength of current in its field windings.
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Deputy Commissioners of Attock (erstwhile Campbellpur) district, Punjab, Pakistan. The office of a collector/DC during the British rule in Indian subcontinent held multiple responsibilities – as collector, he was the head of the revenue organization, charged with registration, alteration, and partition of holdings; the settlement of disputes ...
A brushless DC electric motor (BLDC), also known as an electronically commutated motor, is a synchronous motor using a direct current (DC) electric power supply. It uses an electronic controller to switch DC currents to the motor windings producing magnetic fields that effectively rotate in space and which the permanent magnet rotor follows.
IEC 61970 Energy management system application program interface (EMS-API) IEC TS 61973 High voltage direct current (HVDC) substation audible noise; IEC 61975 High-voltage direct current (HVDC) installations – System tests; IEC 61976 Nuclear instrumentation – Spectrometry – Characterization of the spectrum background in HPGe gamma-ray ...
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The switched reluctance motor (SRM) is a type of reluctance motor. Unlike brushed DC motors , power is delivered to windings in the stator (case) rather than the rotor . This simplifies mechanical design because power does not have to be delivered to the moving rotor, which eliminates the need for a commutator .
The key feature of the Ward Leonard control system is the ability to smoothly vary the speed of a DC motor, including reversing it, by controlling the field and hence the output voltage of a DC generator, as well as the field of the motor itself. As the speed of a DC motor is dictated by the supplied voltage, this gives simple speed control ...