Synchro Types

Synchro types may be classified as follows:

• Torque transmitter
• Torque receiver
• Torque differential receiver
• Torque differential transmitter
• Control transmitter
• Control transformer
• Control differential transmitter
•   Resolver

Torque Transmitter  -  TX

Used to generate an electrical signal corresponding to the angular position of a mechanical component.  The rotor is connected to the component and the stator kept stationary.  The electrical signal is derived from the position of the rotor relative to the stator.  The TX  is generally used as the transmitting element in a remote position indicating system.

 Torque Receiver  -  TR

The rotor of a torque receiver, which is free to turn, moves to a position dependent on the electrical angular information received from its connected torque transmitter or torque differential transmitter.  The TR is generally used as the receiving element (indicator) in a remote position indicating system.

Torque Differential Receiver  -  TDR

The torque differential receiver is electrically connected to two torque transmitters.  The rotor of the TDR, which is free to move, aligns with the stator field.  The position of the stator field depends on the inputs from the two transmitters, and the way in which they are interconnected.  By suitable connection, the TDR can be made to indicate the sum of the transmitter inputs, or the difference between them.

Torque Differential Transmitter  -  TDX

The torque differential transmitter has a stator that receives electrical positional information from a torque transmitter, and a rotor which is mechanically positioned.  This enables it to transmit electrical information corresponding to the sum, or difference, between the electrical input and its own rotor angle.

Control Transmitter  -  CX

Used to generate an electrical signal corresponding to the angular position of a mechanical component.  The rotor is connected to the component and the stator kept stationary.  The electrical signal is derived from the position of the rotor relative to the stator.  The TX  is generally used as the position transmitting element in a remote position control system.

 Control Transformer  -  CT

A CT is electrically connected to a CX and is used to produce an electrical signal for driving a servo system.  The electrical signal produced, is an a.c. voltage with an amplitude and phase dependent on the position of the rotor relative to the stator.

Control Differential Transmitter  -  CTX

A CTX receives electrical information from a CX and has a rotor which can be mechanically moved.  This enables it to transmit an electrical signal proportional to the sum or difference in angle between the electrical input and its own rotor position.

Resolver

A resolver has two mutually perpendicular windings on the rotor and another two on the stator (4 windings in total).  It can resolve an input signal into its sine and cosine components, perform the operations of vector addition and subtraction or convert polar to cartesian co-ordinates and vice versa.