ET131 Electrical Machinery and Controls 1 C-2, P-4, Cr-4



MOHAWK VALLEY COMMUNITY COLLEGEUTICA AND ROME, NEW YORKPHYSICAL SCIENCE, ENGINEERING & APPLIED TECHNOLOGIES DEPARTMENTCOURSE OUTLINEELECTRICAL MACHINERY AND CONTROLS 1ET131REVIEWED AND FOUND ACCEPTABLE BY William Judycki4/20/2017CATALOG DESCRIPTION:ET131 Electrical Machinery and Controls 1 C-2, P-4, Cr-4This introductory course investigates the construction, operation, and control of electrical equipment installed and maintained by the various electrical trades. Topics pertain to direct current equipment and include shunt, series, and compound motors and generators, manual and automatic DC controllers, stepping motors and DC meters. It emphasizes the practical aspects of magnetic flux, counter-electromotive force, armature and field currents, motor and generator loading conditions and the relationship of these electrical characteristics to specific types of mechanical, electrical and electronic controllers.Prerequisite: ET111 Electrical Systems and MA105 Technical Math I.Student learning outcomes:Upon completion of this course, the student will be able to:Construct, troubleshoot and maintain most of the D.C. and A.C. electrical motors and controls used throughout the electrical industry.Evaluate motor circuits and their diagrams.Differentiate between various motor control sensors and their applicationsDesign and debug various motor control circuits.Develop laboratory reports using data taken in experimentsIntegrate a safety plan into their laboratory experiments.DETAILED COURSE OUTLINE:1.Introduction(3 periods)General PrinciplesFractional & Integrated Manual Motor StartersMagnetic Line Voltage Starters2.Circuit Layout, Connections and symbols(4 periods)SymbolsInterpretation & Application of Simple Wiring Diagrams and Circuits3.Control Pilot Devices(5 periods)Push ButtonsRelaysContactorsTimer RelaysFloat switchesFlow SwitchesPhase Failure relaysTemperature Switches4.Basic Control Circuits(6 periods)Two Wire ControlsThree Wire ControlsAutomatic ControlsMultiple Push Button ControlsInterlocking MethodsSequence ControlJoggingTime Delays5.AC Reduced Voltage Starters(3 periods)The Motor and Starting Methods StartersPrimary Resistor Type StartersAutotransformer StartersPart Winding Motor StartersAC Solid State Controllers6.Three Phase Multispeed Controllers(3 periods)Controllers for Two Speed Two Winding MotorsTwo Speed One winding Motor ControllerFour Speed, Two Winding Motor Controller7.Wound Rotor Motor Controllers(5 periods)Wound Rotor Motors and Manual Speed ControllersPush Button Speed SelectionAutomatic AccelerationAutomatic speed ControlSolid State Speed ControlsTEST (1 Period)8.Direct Current Controllers(3 periods)About DC MotorsUse of Reduced Voltage for StartingAcross the Line startingSolid State Controls9.Methods of Deceleration(3 periods)PluggingElectric BrakesDynamic and Regenerative BrakingElectric and Electronic Braking10.Synchronous Motor Control (3 periods)Synchronous Motor OperationPush Button SynchronizingTimed Semiautomatic Syncs11.Motor Drives(3 periods)Direct DrivesGear MotorsFrequency DrivesMagnetic ClutchesDC Variable Speed Controls12.Troubleshooting(2 periods)Motor Startup and Troubleshooting BasicsTroubleshooting Techniques14) Test (1 period)LABORATORY EXPERIMENTS:Students should submit technical reports for the laboratory exercises. Appropriate graphs,tables, and subsequent analysis are expected along with proper spelling and grammar.Safety Procedures, Lab IntroductionThe AC Motor, Description and End Plate, Introduction to componentsLadder Diagrams and first wiringSingle Phase start Stop circuitSingle Phase start Stop circuit with latchingSingle Phase start Stop circuit with latching from two locations with latchTimersPhotosensors SwitchesThree Phase MotorsReversing Three Phase MotorsThree phase motor circuits from two locationsProximity SwitchesFrequency drivesAdvanced Frequency Drives ................
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