The star-connected rotor has a standstill reactance and resistance of 2.0 N and 0.4 N per phase respectively. Determine: (a) the full-load torque if the full-load speed is 1,425 r.p.m., (b) ratio of starting torque to full-load torque, and (c) the additional rotor resistance required to give maximum torque at standstill.

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Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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The star-connected rotor has a standstill reactance and resistance of 2.0 N and 0.4 per phase
respectively. Determine: (a) the full-load torque if the full-load speed is 1,425 r.p.m., (b) ratio
of starting torque to full-load torque, and (c) the additional rotor resistance required to
give maximum torque at standstill.
Transcribed Image Text:The star-connected rotor has a standstill reactance and resistance of 2.0 N and 0.4 per phase respectively. Determine: (a) the full-load torque if the full-load speed is 1,425 r.p.m., (b) ratio of starting torque to full-load torque, and (c) the additional rotor resistance required to give maximum torque at standstill.
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