Ac Motors

AC Motors Several advantages many an(prenominal) types, no brushes, or commutators, or sparks Well suited, constant- repair Some, variable speed change physical bodys, 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 cogwheel can create torque Types of AC travel Universal ride Induction motors (several) contemporaneous 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, nobble rings Fixed rpm, depending on 1. motor design 2. frequency of AC Single-or three-phase AC Single phase induction Lower power requirements Requires scratch circuit Starter must gulf once motor is running Reversible, by start circuit Three- phase induction Self-starting proud power requirement Starters, flaps, landing gear, hydraulic pumps Induction motor construction two primary parts 1. stator 2.

rotor stator coil construction ? Windings in slot ? Around stator periphery ? series of electromagnetic rotor coil construction ? branding iron core ? make out street arab laminations ? Soft steel, keyed in shaft ? Longitudinal slot, sinister pig or aluminum bars Stator windings contract ? Revolving magnetic field ? voltage induce in bars 1. current flows in bars 2. adds magnetic field ? Rotor rotary motion nearly synchronous, stator field ? dismiss difference needed 1. introduce 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 indispensableness to buy off a full essay, order it on our website: Orderessay

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