METHOD FOR WEAKENING THE FIELD OF TRACTION COLLECTOR MOTOR OF AC ELECTRIC LOCOMOTIVE AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2022 - IPC B60L9/08 B60L15/08 H02P7/282 

FIELD: electric motors.

SUBSTANCE: inventions group relates to the control of DC electric motors of an electric locomotive. The method for weakening the field of the collector traction motor of an AC electric locomotive consists in the fact that part of the energy of the excitation winding is transmitted and accumulated in an inductance connected in series with the power switch. In this case, the power switch is closed in the time interval from 0 ms to 1 ms after the mains voltage passes through zero and is opened in the interval from 9 ms to 10 ms of the mains voltage half-cycle after the mains voltage passes through zero at a mains frequency of 50 Hz. In this case, during the opening of the key, the energy accumulated in the inductance is transferred to the output of the rectifier-inverter converter. A device for implementing said method is also claimed, which consists of an input diode, a power switch, an inductance, an output diode, a shunt diode, and a power switch control system.

EFFECT: increasing the efficiency and power factor of the electric locomotive.

4 cl, 2 dwg