Patent ID: 8564979

Claim:
A high-voltage (HV) power supply intended to be connected, by a network input (E 1 , E 2 , E 3 ), to an alternating current (AC) network of frequency Fr, with n phases (P 1 , P 2 , . . . Pi, . . . Pn), n being an integer greater than or equal to 2, i being a rank of the phase ranging between 1 and n, and providing HV high direct current (DC) output voltages (Vk 1 , Vk 2 , Vk 3 ) at at least three HV outputs (Sk 1 , Sk 2 , Sk 3 ), the high-voltage power supply comprising: a single-phase high-voltage conversion module (Mi) per phase Pi of the AC network having a current rectification circuit connected, by a single-phase input (Em) of the single-phase high-voltage conversion module (Mi), to a respective phase Pi of the AC network and, by a rectified-current output (s 1 , s 2 ), to a switching circuit having at least one switching transistor (Trd) for switching said rectified current output at a switching frequency Fd and p secondary HV circuits (S 1 , S 2 , . . . Sj, . . . Sp), each providing respective secondary high voltages (HVs) (Vc 1 , Vc 2 , Vcj, . . . Vcp), p being an integer greater than or equal to 2, j being a rank of the secondary HV circuit ranging between 1 and p; a control and regulation unit UC for the high-voltage power supply comprising one or more control circuits (CCM 1 , CCM 2 , . . . CCMi, . . . , CCMn) per each of single-phase high-voltage conversion modules (M 1 , M 2 , . . . Mi, . . . Mn) providing respective control signals (Cd 1 , Cd 2 , . . . Cdi, . . . Cdn) so as to place the switching transistor (Trd) either in an on state during a first time period t 1 i or in an off state during a following second time period t 2 i at the switching frequency Fd, t 1 i being a duration of the on state of the switching transistor (Trd) of the single-phase high-voltage conversion module (Mi), t 2 i being a duration of the off state of the switching transistor (Trd) of the single-phase high-voltage conversion module (Mi), Td=t 1 i +t 2 i being a switching period with Td=1/Fd, wherein, out of the p secondary HV circuits Sj, n secondary HV circuits Sj of rank j of the single-phase high-voltage conversion modules (M 1 , M 2 , . . . Mi, . . . , Mn) are connected in series with n out of p secondary HV circuits Sj+1 of rank j+1 of the single-phase high-voltage conversion modules (M 1 , M 2 , . . . Mi, . . . Mn) so as to provide the HV high DC output voltages (Vk 1 , Vk 2 , Vk 3 ) which are a sum of the secondary high-voltages (Vc 1 , Vc 2 , . . . Vcj, . . . , Vcp) of the secondary HV circuits in series, expressed as Vk 3 =3.Vc 1 +3.Vc 2 +3.Vc 3 .