Abstract: An externally commutated compensation-type converter system comprises a control unit which connects a main and an additional bridge, each built around controlled semiconductor rectifiers. Shunt capacitors are coupled in parallel with respective a-c terminals of the main bridge and series capacitors are placed between respective a-c terminals of the main and the additional bridge. A smoothing reactor connects respective d-c terminals of the main and the additional bridge, said d-c terminals being arranged to interconnect one another. Terminals of the series capacitors, the a-c terminals of the main bridge and terminals of two respective shunt capacitors, which interconnect one another, are used to form common a-c terminals coupled to an a-c mains. According to the proposed method providing for forced commutation and blocking of the rectifiers of the converter system, the shunt and series capacitors, after they have been charged, are coupled to the rectifiers being blocked.

Abstract: Disclosure is made of a self-optimizing control system for an object with a unimodal quality function. The system comprises an object, a divider, a band-pass filter, an averaging filter, a multiplier, a final control element and an adder which are all placed in series to form a closed loop. The system further includes a search signal generator connected to a second input of the adder. The object's input is also connected to a second input of the divider. Second and third inputs of the final control element are connected to an input and output, respectively, of the band-pass filter. An output of the final control element is connected to a second input of the multiplier.

Abstract: A method of dividing direct current among parallel circuits, whereby the direct current in each parallel circuit is converted into an alternating current at equipotential sections of each parallel circuit, a compensating voltage equal to half the difference between the voltage drops across two neighboring parallel circuits under steady-state conditions and at equality of the direct current therein is produced at each equipotential section, and the compensating voltage is introduced into each parallel circuit in opposition to or in accordance with the circuit e.m.f. The device contains current-equalizing units equal in number to the number of parallel circuits, each having a bridge circuit made up four controlled switches; and capacitors coupled to the points of connection of the controlled switches so as to close the circuit.