CONVERTER OF THREE-PHASE VOLTAGE INTO DC VOLTAGE Russian patent published in 2009 - IPC H02M7/10 

FIELD: electricity.

SUBSTANCE: converter of three-phase voltage into DC voltage is intended for supply of DC loads with increased requirements to reliability of converter. Suggested converter ar p-multiple frequency of rectified voltage pulsation comprises p/6 three-phase sources of power supply, identical voltages of which are serially shifted by phase by 2 π/p electric degrees, and n=(p/6)+1 serially located valve groups, extreme of which comprises three valves combined into anode and cathode valve stars, common points of which create outlet leads of device, and other groups represent six valve rings with three pairs of diametrically installed points of identical valve electrodes connection, extreme valve groups are connected to adjacent groups in three units, every of which is created by free electrode of anode (cathode) valve star and free point of connection of valve electrodes in adjacent valve ring, created by electrodes of another name, adjacent valve rings are connected in three units, every of which is created by free pair of connection points of valve electrodes in adjacent rings, besides in these units electrodes of valves in one adjacent ring have one name, and valve electrodes of the second ring - another one, moreover, one of phases of one of three-phase sources of supply is connected to each unit of adjacent valve groups connection, besides each of phases of any supply source is connected via valves of rings only with phases of adjacent sources of supply, having phase shifts electric degrees, relative to this phase. Overvoltage protection device is connected to each pair of diametral points of six valve rings. Overvoltage protection devices may comprises asymmetrical limiters of voltage, electrodes of which are connected with identical electrodes of ring valves.

EFFECT: suggested converter of three-phase voltage into DC voltage has higher reliability.

2 cl, 8 dwg