ELECTRICAL REACTOR WITH MAGNETIC BIASING Russian patent published in 2008 - IPC H01F29/14 H01F21/08 

FIELD: electrical engineering.

SUBSTANCE: electrical reactor includes laminated core system with upper, lower, middle, and two side yokes, with co-axial upper and lower rods, with upper and lower windings placed on said rods, as well as with two lead-ins, two semiconductor diodes, and two resistors. Starting points of windings are connected to the first lead-in. The first diode has its anode connected to the end of the first winding, while the second diode has its cathode connected to the end of the second winding. The first diode has its cathode connected to the second lead-in. The second diode has its anode connected to the second lead-in. The first and the second resistors are connected in parallel with said diodes. The third resistor is connected to the end of the first winding and to the end of the second winding. The fourth resistor is connected to the end of the first winding and to the cathode of a thyristor, while anode of said thyristor is connected to the end of the second winding. Resistance values of the first and the second resistors are selected in the range of (0.01÷1.0)×R_xx. The third resistor has its resistance value in the range of (R÷R_xx). The fourth resistor has its resistance value equal to (1÷100) ×R, where R_хх=U² /Р_хх is loss resistance of the reactor in open-circuit mode, U is voltage over the reactor, Р_хх is loss in open-circuit mode, and R is reactor winding resistance.

EFFECT: improvement of reliability, lowering of loss in steel, reduction of required amount of steel and copper, labour cost when manufacturing the device, lower power of resistors.

2 cl, 4 dwg