<P> Because of AC 's advantages in long distance high voltage transmission , there were many inventors in the United States and Europe during the late 19th century trying to develop workable AC motors . The first person to conceive of a rotating magnetic field was Walter Baily , who gave a workable demonstration of his battery - operated polyphase motor aided by a commutator on June 28 , 1879 , to the Physical Society of London . Describing an apparatus nearly identical to Baily 's , French electrical engineer Marcel Deprez published a paper in 1880 that identified the rotating magnetic field principle and that of a two - phase AC system of currents to produce it . Never practically demonstrated , the design was flawed , as one of the two currents was `` furnished by the machine itself . '' In 1886 , English engineer Elihu Thomson built an AC motor by expanding upon the induction - repulsion principle and his wattmeter . In 1887 , American inventor Charles Schenk Bradley was the first to patent a two - phase AC power transmission with four wires . </P>
<P> Because of AC 's advantages in long distance high voltage transmission , there were many inventors in the United States and Europe during the late 19th century trying to develop workable AC motors . The first person to conceive of a rotating magnetic field was Walter Baily , who gave a workable demonstration of his battery - operated polyphase motor aided by a commutator on June 28 , 1879 , to the Physical Society of London . Describing an apparatus nearly identical to Baily 's , French electrical engineer Marcel Deprez published a paper in 1880 that identified the rotating magnetic field principle and that of a two - phase AC system of currents to produce it . Never practically demonstrated , the design was flawed , as one of the two currents was `` furnished by the machine itself . '' In 1886 , English engineer Elihu Thomson built an AC motor by expanding upon the induction - repulsion principle and his wattmeter . In 1887 , American inventor Charles Schenk Bradley was the first to patent a two - phase AC power transmission with four wires . </P>
who produced the first motor that run on ac
who produced the first motor that run on ac
Walter Baily
Walter Baily