Title:
【発明の名称】X線管
Document Type and Number:
Japanese Patent JPH0673291
Kind Code:
B2
Abstract:
An alternating-current voltage of a commercial power supply is converted to a direct-current voltage by a rectifier and the output direct-current voltage of the rectifier is converted to an alternating-current voltage again by a DC/AC inverter. The alternating-current voltage is boosted by a transformer up to an intermediate voltage (e.g., 1-20 KV). The output voltage of the transformer is supplied through the slip-ring provided between a frame stationary section and a frame rotating section of a voltage multiplier provided within the rotating section to be multiplied to a high voltage (e.g., +/-60-+/-70 KV). Outputs of the voltage multiplier are supplied to the anode and cathode of an X-ray tube. A voltage multiplier for producing an anode supply voltage and a voltage multiplier for producing a cathode supply voltage are constructed in separate units. The two voltage multiplier units and the X-ray tube unit are disposed within a housing of the rotating section shaped like a ring at equal angular intervals of 120 DEG . The X-ray tube unit contains a protective resistor. The protective resistor is connected in at least one of positions between the anode of the X-ray tube and an anode voltage supply terminal, between a center metal of the X-ray tube and a center metal terminal and between the cathode of the X-ray tube and a cathode voltage supply terminal.
Inventors:
Shigeru Tanaka
Application Number:
JP9431288A
Publication Date:
September 14, 1994
Filing Date:
April 16, 1988
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
H05G1/54; A61B6/00; A61B6/03; H01J35/00; H01J35/04; H02M3/28; H02M7/10; H05G1/06; H05G1/10; (IPC1-7): H01J35/00; H05G1/54
Domestic Patent References:
| JP62188148A | ||||
| JP5894800A |
Attorney, Agent or Firm:
Masayoshi Misawa