METHOD OF CONTROLLING MULTIPHASE RECTIFIER Russian patent published in 2008 - IPC H02M7/12 

FIELD: electricity.

SUBSTANCE: invention concerns technique of transformation the electric power of alternating current into the energy of constant current using gated transformer with a smooth regulation of rectified voltage. It's realised by changing outlet voltage of additionally inserted autonomous three-phase bridge voltage inverter with sinusoidal pulse-duration modulation. The inverter's inlets are connected to the chain of constant current of the unit, outlets are connected to the primary winding of the three-phase matching transformer, and at the same time the secondary phase windings of matching transformer are connected sequentially with the net windings of converting transformers. Changing outlet voltage of the autonomous inverter is realised by adjusting either phase or amplitude or both values of modulating sinusoidal voltage. The secondary phase windings of matching transformer are connected to the net windings of converting transformers either directly or through compensator with the fifth and seventh current harmonics in condensers. Gated windings of converting transformers are connected to the rectifying bridges' outlets of alternating current either directly or through the same compensator. Converting transformers of the unit's blocks are performed either on standalone or parallel magnetic conductors. Rectifying bridges of the unit are connected either parallel or sequentially. The invention can be used in aluminium, copper, zinc, chlorine, hydrogen, etc electrolysis plants, for electrothermics and electric transport and in other branches which use constant current.

EFFECT: simplification and increase of power factor, smooth regulation of rectified voltage of multiphase diode rectifier.

10 cl, 8 dwg