Q2: Table 3 reports the torque-speed characteristic of a 440-V, 60-Hz, squirrel-cage, induction machine with negligible

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Q2 Table 3 Reports The Torque Speed Characteristic Of A 440 V 60 Hz Squirrel Cage Induction Machine With Negligible 1 (250.58 KiB) Viewed 11 times

Q2: Table 3 reports the torque-speed characteristic of a 440-V, 60-Hz, squirrel-cage, induction machine with negligible stator resistance and rotational losses. Table 3: torque-speed characteristic of the induction machine n (rpm) 1800 1550 1300 1050 800 T (Nm) 0 322.5 446.6 442.8 400.4 Q2a) [12 marks] Calculate the rotor resistance r2 and the total leakage inductance Le of the machine. Show your work and list final results in Table 4. [able 4: 1₂ (9) Le (mH) 550 300 50 354.0 312.9 278.4 Table 5: n (rpm) Q2b) [8 marks] Calculate the shaft speed in rpm, if the machine drives a load whose torque-speed characteristic is expressed as T = 0.007@² while Tmax of the machine is not changing. Hint 27 max 2T, assume a very small slip such that T s. Show your work and list final results Smax max Smax in Table 5. Q2c) [10 marks] Calculate the required voltage (line-to-line, rms) for a shaft speed of 1050 rpm, under the same torque condition of part (b), i.e., T = 0.007² while the frequency still 60 Hz. Show your work and list final results in Table 6.. Table 6: Es (V) L-L