Ac Motors

AC Motors Several advantages Many types, no brushes, or commutators, or sparks Well suited, constant-speed Some, variable speed Varying casts, cheaper Aircraft electrical systems Typically, four hundred Hz AC Seven times speed of a 60 Hz aim, same pole count 6,000 to 24,000 rev Gearing can create torque Types of AC take linguistic universal take Induction motors (several) Synchronous motor Universal motors Fractional AC series motors Operate on every AC or DC Brushes, commutator Fans, portable tools Induction motor overview Most popular AC motor No connections amongst 1. motor housing 2. rotating element No brushes, commutator, slip ring Fixed rpm, depending on 1. motor design 2. frequency of AC Single-or three-phase AC Single phase induction Lower great power requirements Requires startle circuit Starter must disconnect erst motor is run ning Reversible, by start circuit Three- phase induction Self-starting High power requirement Starters, flaps, landing gear, hydraulic pumps Induction motor construction Two primary part 1. stator 2.

rotor stator construction ? Windings in expansion slot ? Around stator periphery ? Series of electromagnetic rotor coil construction ? Iron core ? make prohibited circular laminations ? Soft steel, keyed in shaft ? longitudinal slot, sinister copper or aluminum bars Stator windings contract ? Revolving magne! tic plain stitch ? voltage induced in bars 1. current flows in bars 2. adds magnetic field ? Rotor rotary motion nearly synchronous, stator field ? polished difference needed 1. produce torque 2. produce rotation ? Difference= motor slip Single-phase induction motor ? solitary(prenominal) matchless stator winding ? Field pulsates ? Expanding, collapsing field induces current...If you want to deprave off a full essay, order it on our website: OrderCustomPaper.com

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