MULTI-ZONE RECTIFIER OF SINGLE PHASE AC VOLTAGE Russian patent published in 2018 - IPC H02M7/12 

FIELD: electrical engineering.

SUBSTANCE: multi-zone rectifier of single-phase alternating current can be used on an electric stock receiving power from an AC contact network. Multi-zone rectifier of single-phase alternating current contains a transformer whose primary winding is connected to a power source, the secondary winding is made in the form of several series-connected sections with terminals from each of them, a thyristor bridge made of parallel at least four chains, each of which contains a pair of thyristor arms, a load and a control system. Each thyristor arm contains a thyristor, a key, two resistors and two diodes. Anode and cathode of the thyristor are the same inputs of the thyristor arm. Parallel to the thyristor, a circuit of a series-connected key, first and second resistors and a first diode is connected. In this case, the cathode of the first diode is connected to the cathode of the thyristor, and the extreme terminal of the key is connected to the thyristor anode. Point of connection of the first and second resistors is connected to the anode of the second diode, the cathode of which is connected to the thyristor control electrode. Thyristor control electrode, as well as the control input of the key, are the control inputs of the thyristor arm. Outputs of each circuit are connected to the corresponding load terminals, and the inputs of these circuits are connected to the corresponding terminals of the secondary winding of the transformer, the control inputs of each thyristor arm are connected to the corresponding control channels of the control system.

EFFECT: technical result is to increase energy efficiency by increasing its efficiency coefficient through the reduction of the additional energy consumption of the control system during the creation of control signals for all thyristors of thyristor arms, as well as to maintain a high power factor.

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