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  2. Electric power conversion - Wikipedia

    en.wikipedia.org/wiki/Electric_power_conversion

    Aircraft often use 400 Hz power internally, so 50 Hz or 60 Hz to 400 Hz frequency conversion is needed for use in the ground power unit used to power the airplane while it is on the ground. Conversely, internal 400 Hz internal power may be converted to 50 Hz or 60 Hz for convenience power outlets available to passengers during flight.

  3. Rotary converter - Wikipedia

    en.wikipedia.org/wiki/Rotary_converter

    1909 500 kW Westinghouse rotary converter. A rotary converter is a type of electrical machine which acts as a mechanical rectifier, inverter or frequency converter.. Rotary converters were used to convert alternating current (AC) to direct current (DC), or DC to AC power, before the advent of chemical or solid state power rectification and inverting.

  4. US Standard Light Rail Vehicle - Wikipedia

    en.wikipedia.org/wiki/US_Standard_Light_Rail_Vehicle

    Power to the traction motors is controlled through a solid state "chopper" circuit operating at a frequency ranging between 0 to 400 Hz for vehicle speeds up to 17 mph (27 km/h), allowing a continuously variable control of power from the 600 V overhead lines rather than the traditional trolley control at the time, which used a varied number of ...

  5. Constant speed drive - Wikipedia

    en.wikipedia.org/wiki/Constant_Speed_Drive

    Constant speed drive for Boeing 727, made by Sundstrand Corporation. A constant speed drive (CSD) also known as a constant speed generator, is a type of transmission that takes an input shaft rotating at a wide range of speeds, delivering this power to an output shaft that rotates at a constant speed, despite the varying input.

  6. List of railway electrification systems - Wikipedia

    en.wikipedia.org/wiki/List_of_railway...

    Incl. Deux-Montagnes line that was built by CNoR in 1918 as 2400 V DC, converted to 3000 V DC in the 1980s, converted to 25 kV 60 Hz in 1995 by ARTM, being converted to light-metro standard and 1500 V DC Ottawa: O-Train: Confederation Line only; the Trillium Line is diesel LRT. China: Beijing: Beijing Subway: Lines 6, 14 and 16: Changchun ...

  7. Armature Controlled DC Motor - Wikipedia

    en.wikipedia.org/wiki/Armature_Controlled_DC_Motor

    A motor requiring a DC power supply for operation is termed a DC motor. DC motors are widely used in control applications like robotics, tape drives, machines and many more. Separately excited DC motors are suitable for control applications because of separate field and armature circuit. [1] Two ways to control DC separately excited motors are ...

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