07 Basic Concepts of A Machine

07 Basic Concepts of A Machine - Basic Concepts of A...

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Basic Concepts of A Machine
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Basic Concepts of A Machine (1) Stator: stationary portion of the machine Rotor: rotating portion of the machine Shaft: the stiff rod that the rotor is mounted on Air gap (Gap): between stator and rotor
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Basic Concepts of A Machine (2) Load current: the current that varies with load Magnetizing current: provide magnetic field and independent of load Armature: the winding that carries only load current Field: the winding that carries only magnetizing current dc machine: the input/output current is dc machine: the input/output current is ac; ac machine: the input/output current is ac; two categories: synchronous machine induction machine (no field winding, i l tt f ) similar to transformer)
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Basic Concepts of A Machine (3)
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Basic Concepts of A Machine (4) round rotor salient pole rotor
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Electrical vs Mechanical Frequency N N N S S N SS At steady state m e f P f 2
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Slots and Coils (1) ottom Double Layer Lap Winding top bottom tooth slot p top bottom
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Slots and Coils (2) coil end coil side coil side il end coil end coil leads N c turns, 2 N c conductors
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Slots and Coils (3)
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07 Basic Concepts of A Machine - Basic Concepts of A...

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