S Safety, Basic Electricity And Ohm's Law 1 Atomic Structure 2 Electrical Quantities And Ohm’s Law 3 Static Electricity 4 Magnetism 5 Resistors 6 Series Circuits 7 Parallel Circuits 8 Combination Circuits 9 Measuring Instruments 10 Using Wire Tables And Determining Conductor Sizes 11 Conduction In Liquids And Gases 12 Batteries And Other Sources Of Electricity 13 Magnetic Induction 14 Basic Trigonometry And Vectors 15 Alternating Current 16 Inductance In Ac Circuits 17 Resistive-inductive Series Circuits 18 Resistive-inductive Parallel Circuits 19 Capacitors 20 Capacitance In Ac Circuits 21 Resistive-capacitive Series Circuits 22 Resistive-capacitive Parallel Circuits 23 Resistive-inductive-capacitive Series Circuits 24 Resistive-inductive-capacitive Parallel Circuits 25 Surge, Spike, And Lightning Protection 26 Three-phase Circuits 27 Single-phase Transformers 28 Three-phase Transformers 29 Dc Generators 30 Dc Motors 31 Three-phase Alternators 32 Three-phase Motors 33 Single-phase Motors 34 Motor Installation 35 Harmonics 916 Chapter32: Three-phase Motors
Chapter Questions Section: Chapter Questions
Problem 1RQ: What are the three basic types of three-phase motors? Problem 2RQ: What is the principle of operation of all three-phase motors? Problem 3RQ: What is synchronous speed? Problem 4RQ: What two factors determine synchronous speed? Problem 5RQ Problem 6RQ: Name three factors that determine the torque produced by an induction motor. Problem 7RQ: Is the synchronous motor an induction motor? Problem 8RQ Problem 9RQ: Why must a synchronous motor never be started when DC excitation is applied to the rotor? Problem 10RQ: Name three characteristics that make the synchronous motor different from an induction motor. Problem 11RQ: What is the function of the field-discharge resistor? Problem 12RQ: Why can an induction motor never operate at synchronous speed? Problem 13RQ: A squirrel-cage induction motor is operating at 1175 RPM and producing a torque of 22 Ib-ft. What is... Problem 14RQ Problem 15RQ Problem 16RQ Problem 17RQ: Name three factors that determine the amount of voltage induced in the rotor of a wound-rotor motor. Problem 18RQ: Why will the rotor of a wound-rotor motor not turn if the rotor circuit is left open with no... Problem 19RQ: Why is the starting torque per A of starting current of a wound-rotor motor higher than that of a... Problem 20RQ: When is a synchronous motor a synchronous condenser? Problem 21RQ: What determines when a synchronous motor is at normal excitation? Problem 22RQ: How can a synchronous motor be made to have a leading power factor? Problem 23RQ: Is the excitation current of a synchronous motor AC or DC? Problem 24RQ Problem 25RQ Problem 1PA: You are working as a plant electrician. It is your job to install a 300-hp three-phase squirrel-cage... Problem 2PA: You have been given the task of connecting a nine-lead three-phase dual-voltage motor to a 240-V... Problem 3PA: You are an electrician working in an industrial plant. A 30-hp three-phase squirrel- cage motor... Problem 6RQ: Name three factors that determine the torque produced by an induction motor.
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Calculate the mechanical output power by the shunt-wound DC motor when the torque is 1.2 N-m and speed 1500 rpm.
Branch of science that deals with the stationary and moving bodies under the influence of forces.
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