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