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Earliest commercial Tesla motor developed by Westinghouse in 1895

Earliest commercial Tesla motor developed by Westinghouse in 1895

Earliest commercial Tesla type motor developed by Westinghouse engineers is pictured above. Introduced about 1985, this two-phase 200-volt wound-rotor machine had resistances attached to ends of each stator bar. Manually operated multiple-contact (32) rotary rig was used to short resistances when motor attained full operating speed.