REACTIVE POWER CORRECTING DEVICE Russian patent published in 2005 - IPC

FIELD: electrical engineering; power factor correction for ac electric locomotive.

SUBSTANCE: reactive power correcting device has traction transformer, electric-locomotive rectifying converter with traction motor connected thereto, two reactive-power sources, supply-mains mode sensor, and switching unit; newly introduced are also two switching members, each incorporating thyristor switch, voltage sensor built around thyristors, and thyristor-switch control pulse shaper, as well as two resistors; thyristor switches are connected in series with first and second reactive power sources and resistors are connected in parallel with capacitors of respective reactive-power sources.

EFFECT: enhanced power factor due to improved waveform of output current and more complete correction of input-current reactive component under various operating conditions.

1 cl, 1 dwg