Ac Motors

AC Motors Several advantages some(prenominal) types, no brushes, or commutators, or sparks Well suited, constant- amphetamine Some, variable speed change arranges, cheaper Aircraft electrical systems Typically, 400 Hz AC Seven times speed of a 60 Hz aim, same pole count 6,000 to 24,000 rpm railroad train can create torque Types of AC push back Universal ride Induction motors (several) coexisting motor Universal motors Fractional AC series motors Operate on either AC or DC Brushes, commutator Fans, portable tools Induction motor overview Most popular AC motor No connections between 1. motor housing 2. rotating element No brushes, commutator, slip rings Fixed rpm, depending on 1. motor design 2. frequency of AC Single-or three-phase AC Single phase induction Lower power requirements Requires bug out circuit Starter must disconnect once motor is running Reversible, by start circuit Three- phase induction Self-starting graduate(prenominal) power requirement Starters, flaps, landing gear, hydraulic pumps Induction motor construction both primary parts 1. stator 2.

rotor stator construction ? Windings in slot ? Around stator periphery ? serial of electromagnetic rotor coil construction ? adjure core ? make out pecker laminations ? Soft steel, keyed in shaft ? Longitudinal slot, sinister hog or aluminum bars Stator windings contract ? Revolving magnetic field ? voltage induce in bars 1. current flows in bars 2. adds magnetic field ? Rotor revolution nearly synchronous, stator field ? sparse difference needed 1. baffle torque 2. produce rotation ? Difference= motor slip Single-phase induction motor ? solitary(prenominal) one stator winding ? Field pulsates ? Expanding, collapsing field induces current...If you requisite to buy off a full essay, order it on our website: Ordercustompaper.com

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