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High-voltage generator for an X-ray device

A high-voltage generator and X-ray technology, which is applied in X-ray equipment, instruments, output power conversion devices, etc., can solve the problems of difficult adjustment and achieve the effect of shortening the falling time and reducing the output capacitance

Active Publication Date: 2018-03-06
SIEMENS HEALTHCARE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This complicates regulation and disadvantageously necessitates measuring the current zero crossing of the inverter current

Method used

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  • High-voltage generator for an X-ray device
  • High-voltage generator for an X-ray device
  • High-voltage generator for an X-ray device

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Embodiment Construction

[0046] in figure 1 The high-voltage generator 1 shown in FIG. 1 includes an inverter unit 2 on the input side, a rectifier unit 3 on the output side, and a transformer unit 4 connected in between.

[0047] The inverter unit 2 consists of two inverters 5 and 6, which have a constant input voltage U of, for example, 800 volts. i In series.

[0048] The inverter 5 is composed of two half bridges 7 and 8, which are connected in parallel with the (intermediate circuit) capacitor 10 to form a (DC voltage) intermediate circuit 9. In each of the two half bridges 7 and 8, the inverter 5 respectively has two active semiconductor switches connected in series (especially in the form of insulated gate bipolar transistors, abbreviated as IGBT), the active semiconductor The switches each have a freewheeling diode connected in parallel.

[0049] Similarly, the inverter 6 also has two half-bridges 11 and 12, which are connected in parallel with the (intermediate circuit) capacitor 14 to form a (dire...

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Abstract

A high-voltage generator (1) for an X-ray device includes an input-side inverter unit (2), an output-side rectifier unit (3) and a transformer (4) connected between the inverter unit and the rectifierunit. The inverter unit (2) is configured to generate two inverter voltages (ui1, ui2) that are phase-shifted with respect to each other. These inverter voltages (ui1, ui2) are transformed by the transformer (4) into two rectifier voltages (ur1, ur2) that are fed to the rectifier unit (3) such that in no-load operation, one of the two rectifier voltages (ur1, ur2) is proportional to the sum of the inverter voltages (ui1, ui2) while the other of the two rectifier voltages (ur1, ur2) is proportional to the difference between the inverter voltages.

Description

Technical field [0001] The invention relates to a high-voltage generator for X-ray equipment. Background technique [0002] In a common structure, a high-voltage generator used to supply power to X-ray equipment has an inverter on the input side, a rectifier on the output side, and a transformer connected in between. The inverter here feeds the inverter voltage to the primary winding of the transformer, and the transformer transforms the inverter voltage into the rectifier voltage that is delivered to the rectifier. The rectifier voltage is then converted by the rectifier into an output voltage to be delivered to the X-ray equipment. A rectifier as such a high-voltage generator generally uses a passive rectifier, that is, a rectifier equipped only with diodes. [0003] High-voltage generators for X-ray equipment must generally be designed not only for high output voltages up to 150 kV but also for high peak powers up to 100 kW. Transformers used for high voltage generation usual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/337
CPCH02M3/3376H02M1/0077H02M3/33573H02M3/01H05G1/12H05G1/32
Inventor M.莱布尔
Owner SIEMENS HEALTHCARE GMBH