DEVICE TO CONTROL INDUCTION MOTOR Russian patent published in 2013 - IPC H02P1/16 H02P27/08 

FIELD: electricity.

SUBSTANCE: device comprises an autonomous voltage inverter, power outputs of which are connected via current sensors to stator windings of an induction motor, a state observer, and a unit of drivers, outputs of which are connected to control inputs of the autonomous voltage inverter, at the same time power inputs of the autonomous voltage inverter are connected to outputs of a non-controlled rectifier, inputs of which are connected to a source of three-phase AC voltage, the unit of drivers is connected to outputs of a WPM-generator, besides, the state observer is a Luenberger observer, in the proposed device the interface unit is also serially connected with an input filter, the first summator, a PI controller of speed, the second summator, the first PI controller of current, the first and second converters of coordinates, the Luenberger observer, the third summator, a PI controller of flux linkage, the fourth summator, the second PI controller of current, the first converter of coordinates and the WPM generator. The interface unit is connected to the third summator. The first summator is connected to a fuzzy speed controller, the output of which is connected to the second summator. The Luenberger observer is connected with the first summator, the first and the third converters of coordinates. Outputs of the above current sensors are connected to inputs of the second converter of coordinates, and the interface unit is connected to a PC.

EFFECT: reliability improvement.

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