SUMMARY

1-65 transformers and differential units, and occasionally in torque transmitters. When used in differential units, the rotor is wound with three coils so their magnetic axes are 120 degrees apart. A SYNCHRO STATOR is a cylindrical structure of slotted lamination on which three Y-connected coils are wound with their axes 120º apart. TORQUE is simply a measure of how much load a machine can turn. In heavy machinery, it is expressed in pound-feet and in torque synchro systems, it is expressed in ounce-inches. SYNCHRO OPERATING VOLTAGES AND FREQUENCIES vary with different equipment. Synchros are designed for use on either a 115-volt or a 26-volt power source. They also operate on either a 60- or 400-Hz frequency. ELECTROMAGNETIC THEORY forms the basis for understanding all synchro operations.