TRANSFORMER BLOCK - SYNCHRONOUS MOTOR Russian patent published in 2009 - IPC H02P1/50 H02K19/12 

FIELD: electricity.

SUBSTANCE: proposed transformer block - synchronous motor has a power transformer, the secondary coil of which has two three-phase leads for different voltage, and a synchronous motor connected to it, which has a main and an auxiliary three-phase coil on its stator. The main coil is star-connected and is connected to low voltage leads of the secondary coil of the transformer. The beginning of the auxiliary coil is connected through a switching device to high voltage leads of the secondary coil of the transformer while the end is connected to the input of the first three-phase rectifier, to the side of rectified current of which is connected a device for actuating the motor. The transformer block-synchronous motor is distinguished by that, it has a non-contact device for actuating the motor in form of a reverse synchronous generator, with two actuating coils on common fixed poles, and auxiliary rectifiers. One of the actuation coils is connected to the output of the first rectifier, and the other, through the second rectifier, is connected to two starting terminals of one phase of the stator coil of the motor. On the common rotating rotor of the motor and the synchronous generator there is a multiphase coil of the synchronous generator, a third rectifier and an actuating coil of the synchronous motor, connected in series. The actuator coil is connected to the side of the rectified current of the rectifier.

EFFECT: reduced power losses, improvement of weight and size properties and easier operation of the transformer block-synchronous motor.

1 dwg