DEVICE TO CONTROL AND ENSURE DURABILITY OF DOUBLE-FED MOTOR Russian patent published in 2014 - IPC H02H7/08 H02H7/12 H02H7/122 H02P27/05 

FIELD: electricity.

SUBSTANCE: device to control and ensure durability of a double-fed motor comprises an induction motor, a frequency converter made of a controlled rectifier and an inverter, a three-phase transformer. The rectifier is made as a grid thyristor converter, and the inverter - as a rotor thyristor converter arranged in accordance with a bridge three-phase circuit. The device additionally comprises current sensors, protective elements, two reserve half-bridges, each comprising three symistors and two reserve thyristors, and a microcontroller, which is connected to all thyristors and symistors. The specified elements are connected as specified in application materials.

EFFECT: provision of durability of an electric drive arranged on the basis of a double-fed motor in case of emergency faults of a half-bridge of a rotor converter and a grid converter with faults of thyristor non-disconnection or non-connection type.

2 cl, 2 dwg