Tri Safrizal, Adi Sastra P. Tarigan, and Siti Annisah. 2025. “Analysis of the Effect Rotation Speed Control on Three Phase Induction Motor Using VFD Powtech”. International Journal of Economic, Technology and Social Sciences (Injects) 6 (1):55-68. https://doi.org/10.53695/injects.v6i1.1283.