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2. Great Northern Z-1 - Wikipedia

   en.wikipedia.org/wiki/Great_Northern_Z-1

   Regenerative braking had been used from the outset on the 3-phase boxcabs, although this had been dissipated by a load bank at the power station; with the single phase electrification, it could now be re-used by another train or fed into the supply network. [7]

3. Industrial fan - Wikipedia

   en.wikipedia.org/wiki/Industrial_fan

   Industrial fans and blowers are machines whose primary function is to provide and accommodate a large flow of air or gas to various parts of a building or other structures. This is achieved by rotating a number of blades, connected to a hub and shaft, and driven by a motor or turbine .

4. DR Class 250 - Wikipedia

   en.wikipedia.org/wiki/DR_Class_250

   Each axle is powered by a single-phase, series-wound, AC traction motor. The torque is transferred by a double-sided spur gear to a hollow shaft, and by an elastic rubber cone flange to the wheels. Each motor has an own cooling blower. Two scissor-shaped pantographs collect the current of 15 kV / 16.7 Hz from the catenary.

5. Three-phase AC railway electrification - Wikipedia

   en.wikipedia.org/wiki/Three-phase_AC_railway...

   Two Italian three-phase locomotives Class E.432 In some places in Italy, three-phase catenary was reconfigured to work on the standard 3000 V DC electrification scheme in Italy, as seen here at the defunct San Lorenzo al Mare station in Liguria in 1991 (closed 2001). Regular DC catenary is on the left while reconfigured three-phase catenary is ...

6. Variable-frequency drive - Wikipedia

   en.wikipedia.org/wiki/Variable-frequency_drive

   Small variable-frequency drive Chassis of above VFD (cover removed). A variable-frequency drive (VFD, or adjustable-frequency drive, adjustable-speed drive, variable-speed drive, AC drive, micro drive, inverter drive, variable voltage variable frequency drive, or drive) is a type of AC motor drive (system incorporating a motor) that controls speed and torque by varying the frequency of the ...

7. Traction motor - Wikipedia

   en.wikipedia.org/wiki/Traction_motor

   A ZQDR-410 traction motor (the large, dark component on the axle with small ventilation holes) A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives, electric or hydrogen vehicles, or electric multiple unit trains.