Patent ID: 6385062
Filing Date: 2002-05-07
Classification: H02M

Abstract:
A direct current-supplying circuit for inductances in the form of a bridge circuit including a rectifier (G) with a smoothing capacitor over a first bridge diagonal (1, 2) and an inductive load (L) over a second bridge diagonal (3, 4), wherein the first bridge diagonal and the second bridge diagonal form two half-bridge branches lying between a positive pole and a negative pole of the smoothing capacitor and comprising a series connection of a first controllable rectifier cell (V1) and a first diode (D1) lying in a non-conducting direction with respect to a direction of current flow; and at least one of a second rectifier cell (V2) and a second diode (D2) lying in the non-conducting direction with respect to the current flow, whereina connecting node (1) of the first bridge diagonal, connected with the positive pole of a rectifier (G), is interrupted and a decoupling diode (D3), poled in the nonconducting direction in relation to a current-flowing direction, from the positive to the negative direct current pole of the rectifier, is connected between the two half-bridge branches and wherein the smoothing capacitor is divided into two separate capacitances (K1, K2), a first of said separate capacitances (K1), a smoothing capacitor, bridges the direct current side of the rectifier (G) and a second of said separate capacitances (K2), is connected over the second half-bridge branch formed by the series connection of the second diode (D2) and the second controllable rectifier cell (V2) and serves as a capacitor for at least partially absorbing the demagnetizing energy of the inductive load (1) to reduce electrical network reactions.