Belgorod inventor Nikolay Samogray developed a single-phase asynchronous motor with a phase rotor, capable of creating starting torque without complex external starting systems. The main feature of the design is the use of phase-shifting elements that help the unit maintain rotational momentum throughout the entire speed range.
In traditional single-phase asynchronous motors, the problem of starting torque remains one of the key issues. Samogray's project offers two solutions.
The first uses capacitors connected to a split working stator winding. The second uses a separate phase-shifting winding with a capacitor and a modified scheme for placing part of the main winding.
The engineer claims that the scheme allows the motor not only to confidently start under load but also to maintain stable torque even at low speeds.
Tests of prototypes showed that the motor is capable of developing a starting torque of up to 2–3 kg/cm depending on the connection scheme and capacitor capacity.
The technology can be applied in adjustable electric drives, industrial equipment, and compact electromechanical systems.