METHOD TO INCREASE POWER COEFFICIENT AND DEVICE FOR ITS REALISATION Russian patent published in 2012 - IPC H02P7/29 H02P7/292 H02P25/10 B60L9/12 B60W10/08 

FIELD: electricity.

SUBSTANCE: method to increase power coefficient of a device comprising a diode or a thyristor rectifier and a collector electric motor consists in the fact that at the moment of 0-2 ms after transition of grid voltage via zero, field suppression is started, and at the moment of 2-7 ms after transition of voltage via zero field suppression is stopped. To shunt an excitation winding, a switch may be used in a mode of width-pulse modulation. The device to realise the method comprises a transformer, a diode or a thyristor rectifying bridge, a collector electric motor comprising an anchor and an excitation winding, one or more resistors of field suppression, one or more switches. A field suppression resistor may be arranged with an intermediate lead, or as comprising two resistors, and a switch may be connected in parallel to one of the resistor parts. Switches may be IGBT transistors (modules). The device may be installed onto an AC electric locomotive.

EFFECT: higher power coefficient.

7 cl, 2 dwg