公开(公告)号：US10863609B2

公开(公告)日：2020-12-08

申请号：US16542743

申请日：2019-08-16

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Fumio Ishiyama

IPC: H05G1/20 ,  H02M5/458 ,  H05G1/12 ,  H02M1/44 ,  G01N23/04 ,  H02M3/158

Abstract: According to one embodiment, an X-ray high voltage apparatus includes an AC/DC converter, an inverter circuit, a high voltage generator, a power storage device, and the DC/DC converter. The AC/DC converter converts an AC voltage into a DC voltage. The inverter circuit converts the DC voltage into an AC voltage. The high voltage generator externally outputs a power obtained by boosting and rectifying the AC voltage outputted by the inverter circuit. The DC/DC converter receives the DC voltage, and charges and discharges the power storage device. The DC/DC converter is a multi-phase converter including DC/DC converter blocks. Each of the DC/DC converter blocks includes a choke coil. The choke coil is provided with a correction winding for correcting a deviation of a magnetic flux caused by a DC current superimposed on the corresponding choke coil. The correction windings are applied with a summed current based on the DC/DC converter.

公开(公告)号：US11438993B2

公开(公告)日：2022-09-06

申请号：US16842865

申请日：2020-04-08

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Fumio Ishiyama

IPC: H05G1/18 ,  H05G1/12 ,  H02M7/219 ,  H02M1/42

Abstract: According to one embodiment, the X-ray high voltage apparatus includes a plurality of converters and control circuitry. The plurality of converters converts AC power to DC power. Each converter includes choke coils and three-phase rectifier circuits. Each choke coil has a main winding and is provided on each phase line of three-phase AC power supply lines. Each three-phase rectifier circuit includes a switching device. The control circuitry is configured to interleave the plurality of converters. Each choke coil of the each converter has the single main winding and two correction windings of a first correction winding and a second correction winding. Each of currents flowing through the respective two correction windings is a sum of currents flowing through the plurality of converters performing interleaving operation, and flows so as to cancel a magnetic flux generated in the main winding.

公开(公告)号：US10660189B2

公开(公告)日：2020-05-19

申请号：US15987434

申请日：2018-05-23

Applicant: Canon Medical Systems Corporation

Inventor： Fumio Ishiyama

IPC: H05G1/18 ,  H05G1/56 ,  H01J35/10 ,  H05G1/70 ,  H05G1/58 ,  A61B6/00 ,  A61B6/04

Abstract: An X-ray diagnosis system comprises an inter-capacitor terminal, a first inter-switching-element terminal, a second inter-switching-element terminal, and a third inter-switching-element terminal, wherein the first inter-switching-element terminal, the second inter-switching-element terminal, and the third inter-switching-element terminal are configured to supply three-phase alternating current power, and the inter-capacitor terminal and two of the first inter-switching-element terminal, the second inter-switching-element terminal, and the third inter-switching-element terminal are configured to supply two-phase alternating current power.