 
 <prompt> Wetin dey before the first alternating current motor? Based on di last question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: In 1824, di French physicist François Arago talk say rotating magnetic fields dey exist, wey dem call Arago's rotations, wey Walter Baily demonstrate for 1879 as di first small small induction motor. For di 1880s, many people dey try develop AC motors because AC get advantage for long-distance high-voltage transmission but e no fit operate motors on AC. Di first alternating-current commutatorless induction motors na Galileo Ferraris and Nikola Tesla invent independently, Ferraris show working motor model for 1885 and Tesla show im own for 1887. For 1888, Royal Academy of Science of Turin publish Ferraris' research wey explain how motor dey work but dem talk say di motor no fit make money. For di same 1888, Tesla present im paper A New System for Alternating Current Motors and Transformers to AIEE wey describe three patented two-phase four-stator-pole motor types: one with four-pole rotor wey no fit start by itself, another with wound rotor wey fit start by itself, and the third one na true synchronous motor wey need separate DC supply to rotor winding. One of di patents wey Tesla file for 1887, also describe shorted-winding-rotor induction motor. George Westinghouse quick quick buy Tesla's patents, employ Tesla to develop am, and assign C. F. Scott to help Tesla, but Tesla waka comot go do other things for 1889. The constant speed AC induction motor no work well for street cars but Westinghouse engineers manage adapt am to power mining operation for Telluride, Colorado for 1891. Mikhail Dolivo-Dobrovolsky dey promote three-phase development, e invent three-phase cage-rotor induction motor for 1889 and three-limb transformer for 1890. Dis type of motor dey used for plenty things now... 