English: This was initially actually the three phase configuration was initially introduced by Tesla, it was invented by Tesla and he had made the induction motor sometime in 1890’s or something, so induction motor design had not changed until day, it is almost remaining the same ever since 1890.
Telugu: ఈ త్రీఫేస్ ఇండక్షన్ మెషిన్ (three induction machine) ను మొదటిగా Tesla అనే సైంటిస్ట్ 1890 లో తయారు చేశాడు అప్పటినుండి ఇప్పటివరకూ ఆ డిజైన్ లో ఏ మార్పూ లేదు.