EXCITATION SYSTEM OF ASYNCHRONIZED ELECTRIC MACHINE Russian patent published in 2018 - IPC H02P9/14 H02P9/30 

FIELD: electricity.

SUBSTANCE: longitudinal excitation winding (1) and transverse excitation winding (2), located on the rotor of the asynchronized machine, are connected in series and fed by a three-phase transformer (3) through two back-to-back three-phase controlled rectifier. The first rectifier is formed by thyristor groups (4) and (5), the second one - by thyristor groups (6) and (7). The rectifiers are controlled by an automatic excitation controller (8), influencing their thyristor groups (4-7). The common point (9) of the windings (1) and (2) is galvanically connected to the neutral (10) of the secondary windings of the transformer (3) by the circuit (11). A rejection filter from parallel inductance (12) and capacitor (13) is introduced in the circuit (11) and is tuned to the third harmonic of the mains frequency. The secondary windings of the transformer (3) are made of semi-windings and are connected in a zigzag.

EFFECT: simplification of the excitation system and reduction of energy losses in its elements.

3 cl, 2 dwg