DEVICE FOR POWERING ASYNCHRONOUS ELECTRIC MOTOR Russian patent published in 2007 - IPC H02J3/38 H02J9/04 H02M7/42 

FIELD: engineering of devices for powering asynchronous electric motors with short-circuited rotor used at objects where two powering voltage network are present, of direct and alternating current, in particular for centrifugal pumps in fuel transfer system of aircrafts.

SUBSTANCE: the device consists of contactor, threshold element, constant current network enabling relay, current indicator, voltage indicator, low voltage inverter control rule generator, low voltage inverter control block, block of low voltage transistors connected in accordance to one-phased bridge circuit, transformer, semiconductor rectifier, inductance-capacitive filter, high voltage inverter control rule generator, high voltage inverter control block, block of transistors connected in accordance to three-phased bridge circuit. Device ensures provision of power to asynchronous electric motor of fuel pump either by network of three-phased alternating current of constant frequency, or by constant current network by its transformation to three-phased alternating current network with constant value of frequency to voltage ratio. Value of current consumed from constant current network is controlled additionally as well as upper limit voltage at output of device with limitation of both current and voltage when they reach limit values.

EFFECT: increased reliability of operation of fuel-feeding equipment in emergency situations with limited power resources.

2 dwg