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THREE-PHASE INDUCTION MOTOR

INDUCTION Machines - 1 THREE-PHASE INDUCTION MOTOR March 2007 A. PREPARATION 1. Introduction 2. The Rotating Field 3. Rotor Currents 4. INDUCTION MOTOR Equivalent Circuit 5. Torque and Power Characteristics 6. Operation Beyond the Range 0 < s < 1 7. Determination of MOTOR Constants 8. Bibliography B. EXPERIMENT 1 . Equipment List 2. Speed and Direction of Rotation 3. Starting Current 4. No Load Test 5. Locked Rotor Test C. REPORT INDUCTION Machines - 2 INDUCTION Machines - 3 INDUCTION Machines - 4 INDUCTION Machines - 5 INDUCTION Machines - 6 INDUCTION Machines - 7 INDUCTION Machines - 8 INDUCTION Machines - 9 INDUCTION Machines - 10 INDUCTION Machines - 11 INDUCTION Machines - 12 INDUCTION Machines - 13 INDUCTION Machines - 14 Rather than the equivalent circuit of Fig.

applied to the motor shaft and to measure both rpm and torque. The rpm sensor operates on a Hall effect principle and consists of a disk bearing on its periphery two magnetic pole-pairs and a detector that pulses once each time a pole-pair is rotated past it. Observe that, by counting the output of the detector, you will get

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