METHOD FOR ADJUSTING THREE-PHASE VOLTAGE AND FREQUENCY WITH INTERMEDIATE CONVERSION OF ELECTRICAL ENERGY Russian patent published in 2004 - IPC

FIELD: converters engineering.

SUBSTANCE: method includes connecting enabling each winding of multi-winding transformer according to star circuit by means of commuting element in form of transistor key at output of three-phase diode bridge connected by its AC contacts to outputs of one of windings. For receiving three-phase feeding voltage of increased frequency, transistors of primary windings are in mode for alternating even-spaced switching with constant tact frequency. Adjustment of frequency and load voltage value may be performed by changing frequency of unlocking impulses fed onto transistor keys of secondary windings, or by phase method at power grid frequency in mode for tracking value and frequency of changing of control signal by controlling transistors of secondary windings by logical expressions in function for control impulses and unlocking impulses fed to transistors of primary windings.

EFFECT: controlled structural parts of frequency converter.

2 cl, 3 dwg