Determine the main dimensions, turns per phase, no. of slots, conduct…
Previous year question for Electrical Machine Design.
Question
Determine the main dimensions, turns per phase, no. of slots, conductor cross-section and slot area of a 250 h.p, 3 phase, 50 Hz, 400 volt, 1410 r.p.m slip ring induction motor. Assume $\text{B}_{\text{av}} = 0.5 \text{ Wb/m}^2$, $\text{ac} = 30000 \text{ A/m}$, efficiency = $0.9$ and power factor = $0.9$, winding factor = $0.955$, current density = $3.5 \text{ A/mm}^2$. The slot space factor is 0.4 and the ratio of core length to pole pitch is 1.2. The machine is delta connected.
- Year: 2018
- Subject: Electrical Machine Design