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39 Cards in this Set
- Front
- Back
What is the name given to a variety of rotary electromechanical, position sensing devices?
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The Synchro
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What is the primary purpose of a synchro system?
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Precise and rapid transmission of data between equipment and stations
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Name the two general classifications of synchro systems.
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Torque and control
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What is the difference between a torque synchro and a control synchro?
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A torque synchro is used for light loads and a control system is used for heavy loads.
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Name the two synchros that provide a mechanical output
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The torque receiver (TR) and the torque differential receiver (TDR)
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What does the code 26V-11TX4D mean ona synchro nameplate?
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It is the third modification of a 26-volt-400-hertz (torque) synchro transmitter who's diameter is between 1.01 and 1.10 inches.
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Which of the two synchro designation codes is indicated by 5DG on a synchro nameplate?
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The Navy prestandard designation code.
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On the synchro scematic symbol, what indicates the angular displaceent of the rotor?
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The position of the arrow.
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What are the two major components of a synchro?
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The rotor and the stator.
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Which of the two main types of rotors can have either a single winding or three Y-connected windings?
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The drum or wound rotor
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How does the stator receive its voltage?
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By the magnetic coupling form the rotor.
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Where are the external connections made on standard synchros?
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At the terminal board.
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What major factors determine the load capacity of a torque-synchro transmitter?
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The number and typeof synchro receivers, the mechanical loads on these receivers and the operating temperatures of both the transmitter and receivers.
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Define the term "torque"
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A measure of how much load a maching can turn.
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What unit of measurement refers to the torque of a synchro transmitter?
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Ounce-inches.
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What type of equipment normally uses 26-volt-400 hertz synchros?
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Aircraft.
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When will a synchro generate more heat than it is designed to handle?
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When it is overloaded.
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How do synchros differ form conventional transformers?
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Synchros have one primary winding that can be turned through 360 degrees and three secondary windings spaced 120 degrees apart.
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Describe the zero-position of a synchro transmitter.
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The transmitter is in its zero-position when the rotor is aligned with the S2 stator winding.
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When is the maximum voltage induced into a stator coil?
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When the rotor coil is aligned with the stator coil.
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What three factors determine the amplitude of the voltage induced into a stator winding?
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The amplitude of the primary voltage, the turns ratio and the angular displacement between the rotor and the stator winding.
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What is the physical difference between a sychro transmitter and a synchro receiver?
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A synchro receiver uses some form of damping to retard excessive oscillations or spinning.
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What method is used to prevent oscillations in large synchro units?
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Mechanical damping.
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What two components make up a simple synchro transmission system?
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A synchro transmitter and asynchro receiver.
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What leads in a simple synchro system are connected to the ac power line?
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The rotor leads.
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What is the relationship between the transmitter and receiver stator voltages when thief rotors are in correspondence?
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The voltages are equal and oppose each other.
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What is the name given to the angle through which a transmitter's rotor is mechanically rotated?
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Signal
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What two receiver leads are reversed to reverse the rotor's direction of rotation?
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1 and S3
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What is the most likely problem i fthe transmitter shaft reads 0 degrees when the receiver shaft indicates 180 degrees?
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The rotor leads on either the transmitter or the receiver are reversed.
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What is the purpose of using differential synchros instead of regualr synchros?
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Differential synchros can handle more signals then regular synchros and also perform addition and subtraction functions.
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What are the two types of differential synchros?
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The TDX and the TDR
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Other than their physical differences, what is the major difference between a TDX and a TDR?
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their application: a TDX has one electrical and one mechanical input with an electrical output.
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What deterines whether a differential synchro adds or subtracts?
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The way the differential synchro is connected in a system is the deciding factor on whether the unit adds or subtracts its inputs.
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In a TDX system, when does the TR rotor follow the TX rotor exactly?
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When the TDX rotor is on 0 degrees
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What is the angular position of a TX rotor when it is pointing toward the S1 winding?
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240 degrees
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In a TDX system with standard synchro connections, the TX rotor is at 120 degrees and the TDX rotor is at 40 degrees. What position will the TR indicate?
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80 degrees.
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What connections in a TDX system are reversed to set up the system for addition?
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The S1 and S3 l3eads are reversed between the TX and the TDX, and the R1 and R3 leads are reversed between the TDX rotor and the TR.
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What connections in a TDR system are reversed to set up the system for addition?
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The R1 and R3 leads between the TDR rotor and the TX to which it is connected.
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In a TDR system connected for addition in what direction will the TDR rotor field turn whe the TX rotor to which it is connected turns counterclockwise?
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Clockwise
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