WOUND-ROTOR SLIP RECOVERY SYSTEM Russian patent published in 2008 - IPC H02P27/06 

FIELD: electricity.

SUBSTANCE: similarly to prototypes, wound-rotor slip recovery system contains induction motor with phase rotor. Stator coil of rotor is connected to the supply line, whereas rotor coils are coupled with three-phase input bridge rectifier. Cathode outputs of the rectifier are linked with anode input of the rectifier. Three-digit inverter consists of optical triple diodes. The specific feature if this diagram is the anode group of rectifiers consists of diodes, whereas cathode group is made up with triple diodes. Diode cathode is connected to the control electrode of each triple diode, while anodes of the above three diodes are joined in the common point. The first terminal of resistor with controlled resistance is also connected to the common point and the second terminal is connected to the common cathode connection point of the other three diodes. Anodes of the said diodes are coupled with phase coil of rotor. Three-phase input of phase shifter is connected to the supply line, whereas its three-phase output is coupled with the definite terminals of the three transformer primary coils. The other terminals of the transformer coils are joined in common point. LED cathode of optical thyristor isolator is connected to the first terminal of each transformer secondary coil. LED anode is coupled with the other LED cathode having anode connected to the second terminal of each transformer secondary coil in induction motor control system with phase rotor.

EFFECT: wide range of torque moment control and high power indices due to energy transfer to supply line.

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