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1. Why is DFIG not considered for motoring applications for speed range from zero to rated speed?

2. Equation relates stator voltage, rotor voltage, and torque. Use a spreadsheet program to develop a macro to plot a family of curves in relation to the input parameters.

Assume the following machine parameters R_s = 0.598 Ω, R_r= 0.271 Ω, L_ls = 3 m_H, L_lr = 1.2 m_H, V_s = 220 V, V_r = 10 V, p = 4, and ω_e = 377 rad/s. 11.5 Study the article by Da Silva et al.19 Propose a modern and contemporary circuit and control techniques to achieve a similar system performance for a DFIG wind- or hydro-based energy system

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