Selsyn motors

During starting, resistance may be placed in series with the rotor windings to limit starting current. Starting wound rotor induction motors from common resistors. If one rotor is moved through an angle θ, the other selsyn shaft will . A synchro is, in effect, a transformer whose primary-to-secondary coupling may be varied by physically changing the relative orientation of the two windings. In its general physical construction, it is much like an electric motor .

A selsyn system requires the use of at least two synchro machines.

The selsyn motors resemble two synchronous motors.

They are connected to each other with three wires. The system uses the principle of electromagnetic induction. The generator and receiver are also calle a transmitter and receiver. SelsynA selsyn is an electric vehicle designed for angular displacement of the shaft of any machine in accordance with angular displacement of the shaft of the other machine, providing such motion synchronization without mechanical contact, i. The word selsyn is an abbreviation of the words self-synchronous.

Selsyn units are special ac motors used primarily in applications requiring remote control.

If the starting resistors are remove but the rotors still parallele there is no starting torque. A pair of selsyn motors looks like two synchronous motors connected to each other with three wires. The torques on both shafts are the same.

So is the angular position of the two shafts.

Slaysyn motors were used in old WWradar sets to transmit the motion of the rotating antenna to the rotating CRT display in the ship interior. Both are energized by 1volts, cycle, single-phase, alternating current. This synchro system, which develops no torque of its own, acts as the control device for the motor which moves high torque loads. The accuracy of the entire system depends on the synchro error, amplifier.

SYNCHROS ARE SELF-SYNCHRONIZING.

Selsyn type are the only ones suitable for universal applica- tion. When the DC selsyn system is used to indicate the position of the landing gear. Synchro transmitter is 400Hz, receiver is 60.

Switches located on the actual locking devices close when the locks engage. MEMBER AIEE loads, providing the ratio of breakdown to locked-rotor torque is correct. The first system uses, besides one or more prime movers, individual selsyn motors for synchronizing.