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Marine - Shipboard Synchro's, Torqsyns & Servo Motors
Description:
Synchros, Torqsyns and Servo Motors are used extensively throughout the ship in Transmission and Servo Systems to transmit ship’s parameter data to remote locations as required.
Synchro
Synchros as identified by the Armed Forces, are electromagnetic devices which have certain characteristics and are used primarily for the transfer of angular data. Synchros are in effect transformers whose primary-to- secondary coupling may be varied by physically changing the relative orientation of the two windings. Aboard ship, radar antennas, gun turrets, sonar projectors, rudder and other devices whose positions are variable can have their position data transmitted by synchro to remote control and observation points.
Torqsyn
A torqsyn’s function and application are similar to a Synchro. The torqsyn incorporates a high efficiency continuous rotation DC torque motor and a synchro control transformer mounted on a single shaft, with all necessary electronics in a compact case.
AC Servo Motor
AC servo motors are used primarily to move light loads. Most of the AC servo motors are of the two phase or split phase induction type. Fundamentally these motors are constant speed devices although their speeds can be varied within limits by varying the amplitude of the voltage to one of the stator windings.
DC Servo Motor
The control characteristics of DC servo motors are superior to those of AC servo motors. The DC servo motor is designed to control heavy loads at variable speeds.
Types:
Military Standard Synchro types are shown below:
| FUNCTIONAL CLASSIFICATION | ABBREVIATION | INPUT | OUTPUT |
Torque Transmitter |
TX |
Mechanical input to rotor (rotor energized from AC source.) |
Electrical output from stator representing angular position of rotor to TDX, TDR, or TR. |
Control Transmitter |
CX |
Same as TX |
Same as TX except it is supplied to CDX or CT. |
Torque Differential |
TDX |
Mechanical input to rotor, electrical input to stator from TX or another TDX. |
Electrical output from rotor representing algebraic sum or difference between rotor angle and angle represented by electrical input to TR, TDR, or another TDX. |
Control Differential |
CDX |
Same as TDX except electrical input is from CX or another CDX |
Same as TDX except output to CT or another CDX. |
Torque Receiver |
TR |
Electrical input to stator from TX or TDX (Rotor eneregized from AC source.) |
Mechanical output from rotor note: rotor has mechanical inertia damper. |
Torque Differential |
TDR |
Electrical input to stator from TX or TDX, another electrical input to rotor from TX or TDX.) |
Mechanical output from rotor representing algebraic sum or difference between angles represented by electrical inputs. Has inertia damper. |
Control Transformer |
CT |
Electrical input stator from CX or CDX, mechanical input to rotor. |
Electrical output from rotor proportional to the size of the angle between rotor position and angle represented by electrical input to stator. Called error signal. |
| LETTER | DEFINITION |
D |
Differential |
R |
Receiver |
T |
Transformer |
X |
Transmitter |
Prestandard Synchro Types are shown below:
| LETTER | DEFINITION |
G |
Transmitter |
F |
Flange mounted receiver (this letter is normally omitted if letters other than H or S occur in type designation. |
D |
Differential Receiver |
DG |
Differential Transmitter |
CT |
Control Transformer |
H |
High Speed Unit |
B |
Bearing Mounted Unit |
N |
Nozzle Mounted Unit |
S |
Special Unit |
| SIZE | APPROX. DIAMETER | APPROX LENGTH | APPROX WEIGHT |
1 |
2 1/4 in. |
4 in. |
2 lbs. |
3 |
3 1/10 in. |
5 3/8 in. |
3 lbs. |
5 |
3 3/8 to 3 5/8 in. |
6 1/2 in. |
5 lbs. |
6 |
4 1/2 in. |
7 in. |
8 lbs. |
7 |
5 3/4 in. |
9 in. |
18 lbs. |
Torqsyn types are shown below:
Servo Motor Manufacturer types are shown below:
Kearfott Guidance & Navigation Corp
Litton Systems Inc.
Henschel Corp
MPC products Corp
Meggitt Avionics Inc.
Synchros Examples:
Examples:
Military Standard: |
Navy Prestandard: |
Torqsyn: |
Servo Motors: |
Original Equipment Manufacturer’s (OEMs):
Kearfott Corp
Litton Corp
Clifton Precision
Vernitron
General Electric
Henschel Corp
MPC Products
Meggitt Avionics
Tachtronics