METHOD FOR DIFFERENT-PHASE CONTROL OF RECTIFIER-INVERTER CONVERTERS OF AC ELECTRIC LOCOMOTIVE Russian patent published in 2020 - IPC H02M5/297 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the electrical equipment. Disclosed is method of control of alternating-current electric locomotive with rectified-inverting converter (RIC) with diode discharge arms, by different-phase control of angle transducers α₀ and α_p with diversity in time of commutation of thyristors of arms of different converters, in which for initial opening of arms connected to secondary winding of transformer with low voltage, opening angles are formed in accordance with mathematical expression where α₀ – minimum angle of converter thyristors number 1 opening; n is number of converter; N is number of converters in electric locomotive; T_0max – maximum time of different-phase RIC control by angle α₀. Phase-adjustable angles of opening of thyristors of arms of converters connected to a secondary winding of a transformer with a higher voltage, are formed in accordance with mathematical expression where α_p is phase-controlled opening angle of converter thyristors number 1; T_pmax – maximum time of different-phase RIC control by angle α_p.

EFFECT: proposed method of electric locomotive RICs control using diode discharge arm provides increase of power factor and reduction of power supply voltage sinusoidality distortion coefficient; different direction of angle shift α₀ and α_p in this case allows to equalize average voltage on electric locomotive electric motors, changing at equal-phase control of RIC, and also to reduce pulsation of rectified current.

1 cl, 1 dwg