AC sychronous motors

AC synchronous motors are the workhorses of industry. With synchronous engine technology, speed is straight proportional to AC input frequency – for example, at 120 Vac, 60 Hz, an AC synchronous motor will turn at 72 rpm. This speed can be varied by varying the frequency, although most applications simply make use of gearing or a belt- or chain-drive Leaf Chain program to achieve the desired load speed.

We offer a comprehensive selection of AC synchronous electric motor products including continuous torque, high torque and hybrid choices to meet a wide range of application requirements. Our synchronous motors offer many advantages, including the ability to start within 1-1/2 cycles of the used frequency and reach full synchronous speed within 5 to 25 milliseconds. They can also stop within 5 examples of rotation and reverse equally rapidly.

We offer two groups of AC synchronous motors in the ST/SN Series and KS/SS Series. High performance motors in these series can be found in NEMA 23, 34 and 42 body sizes, with two- and three-phase models available in each size. Resistor-capacitor kits are available for operating two-phase synchronous motors from a single-phase power resource. We also provide hazardous duty AC synchronous motors, authorized to UL Course I, Division 1, Group D; UL Class 1, Division 2, Groups Electronic, F and G; and ATEX specifications.


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