MEEN 225 Lecture Notes - Lecture 21: Rotating Magnetic Field, Induction Motor, Electrical Energy
8 Jan 2018
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Document Summary
A machine is a device that convert either:: mechanical energy to electrical energy generator, electrical energy to mechanical energy motor. The conversion of energy results from the following electromagnetic phenomena:-o. When a conductor moves in a magnetic field, voltage is induced in the conductor: when a current-carrying conductor is placed in a magnetic field, the conductor experiences a mechanical force. Since any given machine can convert power in either direction, a machine can be used as either a generator or a motor. For induction machines, because the induction generators have low efficiency and many disadvantages, the machines are usually referred to as induction motors. 2 types: squirrel-cage rotor & wound rotor. Stator construction: the stator is laminated iron core with slots, coils are placed in the slots to form a three or single phase winding. Rotor is laminated iron core with slots. Metal (aluminum) bars are molded in the slots instead of a winding.
