SINGLE-PHASE ALTERNATING CURRENT MULTI-ZONE RECTIFIER Russian patent published in 2020 - IPC H02M7/162 H02M1/08 

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 comprises a thyristor, a switch, a resistor, a diode, a step-down transformer and a capacitor. Anode and cathode of the thyristor are the same inputs of the thyristor arm. In parallel to thyristor circuit is connected from series connected key, primary winding of step-down transformer and resistor. First lead of the primary winding of the step-down transformer is connected to the thyristor anode, and the extreme lead of the capacitor is connected to the cathode of the thyristor. Between the control output and thyristor cathode a circuit is connected from series-connected diode, switch, secondary winding of step-down transformer and resistor, at that cathode of diode is connected to thyristor control electrode, and extreme lead of resistor is connected to cathode of thyristor. 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 consists in improvement of energy efficiency due to increase of its efficiency due to reduction of additional power consumption by control system during generation of control signals for all thyristor arms and reduction of losses in thyristor arms, as well as due to increase of power factor due to less phase shift between current and voltage in primary winding of transformer.

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