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For example; a single-phase motor with 3 north and 3 south poles, having 6 poles per phase, is a 6-pole motor. A three-phase motor with 18 north and 18 south poles, having 6 poles per phase, is also a 6-pole motor. This industry standard method of counting poles results in the same synchronous speed for a given frequency regardless of polarity.
Traction motors: 16 × Fuji Electric MLR109 140 kW (188 hp) self-ventilated 3-phase AC induction motor 550V 193A 1760 r/min: Power output: 2.24 MW (3,004 hp) Transmission: Westinghouse-Natal (WN) Drive: Acceleration: 1 m/s 2 (3.3 ft/s 2) Deceleration: 1.3 m/s 2 (4.3 ft/s 2) (service) Auxiliaries: Fuji Electric auxiliary inverter with battery ...
A three-phase induction motor has a simple design, inherently high starting torque and high efficiency. Such motors are applied in industry for many applications. A three-phase motor is more compact and less costly than a single-phase motor of the same voltage class and rating, and single-phase AC motors above 10 hp (7.5 kW) are uncommon. Three ...
[34] [35] In 1888 Westinghouse also licensed Nikola Tesla's induction motor which they would eventually develop into a usable (2-phase) AC motor. The modern 3-phase system was developed by Mikhail Dolivo-Dobrovolsky and Allgemeine Elektricitäts-Gesellschaft and Charles Eugene Lancelot Brown in Europe, starting in 1889. [3] [33]
Lamme took over the stalled project of developing a practical version of Nikola Tesla's patented induction motor from Westinghouse engineer Charles F. Scott and came up with a more efficient cage winding design. [2] Over a period of several years, he designed a variety of electrical motors and generators, inventing the damper winding. [3]
The three-phase induction is now used for the vast majority of commercial applications. [51] [52] Mikhail Dolivo-Dobrovolsky claimed that Tesla's motor was not practical because of two-phase pulsations, which prompted him to persist in his three-phase work. [53] The General Electric Company began developing three-phase induction motors in 1891 ...
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