AC synchronous motors will be the workhorses of industry. With synchronous motor technology, speed is straight proportional to AC input frequency – for example, at 120 Vac, 60 Hz, an AC synchronous electric motor will turn at 72 rpm. This speed can be varied by various the frequency, although most 
applications Transmission Chain simply make use of gearing or a belt- or chain-drive system to achieve the desired load speed.
We offer a comprehensive selection of AC synchronous motor products including continuous torque, high torque and hybrid options to meet an array of app requirements. Our synchronous motors provide many advantages, like the ability to begin within 1-1/2 cycles of the applied frequency and reach full synchronous acceleration within 5 to 25 milliseconds. They are able to also stop within 5 degrees of rotation and reverse similarly rapidly.
We offer two groups of AC synchronous motors in the ST/SN Series and KS/SS Series. Powerful motors in these series can be found in NEMA 23, 34 and 42 body sizes, with two- and three-phase models obtainable in each size. Resistor-capacitor kits are available for operating two-stage synchronous motors from a single-phase power resource. We also offer hazardous duty AC synchronous motors, authorized to UL Course I, Division 1, Group D; UL Class 1, Division 2, Groups E, F and G; and ATEX criteria.