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Dual/multi-energy control method for LCC resonant high-voltage power supply

A technology of high-voltage power supply and control method, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of slow switching speed, increased adverse effects, motion blur, etc.

Active Publication Date: 2021-09-14
ZHEJIANG UNIV +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, a dual-energy high-voltage power supply for a dual-energy system based on a single bulb and a single power supply is very important. Dual (multiple) energy irradiation can be completed in a short time, which places extremely high requirements on the switching speed of the high-voltage power supply. Slow switching speed will not only increase the adverse effect of motion blur on the actual effect, but also increase the impact of useless rays on shooting object damage

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  • Dual/multi-energy control method for LCC resonant high-voltage power supply
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  • Dual/multi-energy control method for LCC resonant high-voltage power supply

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[0065] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0066] Such as figure 1 As shown, the X-ray system includes at least the general controller, high-voltage power supply, and X-ray tube. Depending on the function, it may also include moving parts such as the boom, and photoelectric panel receiving parts. The required dual-energy mode output voltage is as follows: figure 2 As shown, the required multi-energy mode output voltage is as follows image 3 As shown, the following implementations are in accordance with image 3 The multi-energy mode (boost-buck hybrid) output level in the example is described as an example.

[0067] The structure and principle of the whole control circuit are as follows: Figure 4 As shown, first the converter works in the normal output mode, the output voltage changes from 0...

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Abstract

The invention discloses a dual / multi-energy control method of an LCC resonant high-voltage power supply. A power supply is required to output two or more different voltages in one output process, and switching among different output voltage modes should be completed as soon as possible. According to the invention, a steady-state working point of a target voltage mode is obtained through a table look-up method, and the switching requirement is completed based on the calculation of a trajectory control formula, so that dual (multi)-energy output of a single power supply is realized within the shortest time; and meanwhile, the power supply does not have voltage and current stress which has adverse effects on the quality of output voltage and the safety of the power supply.

Description

technical field [0001] The invention belongs to the technical field of power electronic control, and in particular relates to a dual / multi-energy control method of an LCC resonant high-voltage power supply. Background technique [0002] As the core component of the X-ray system, LCC resonant high-voltage power supply is widely used in medical imaging inspection, industrial non-destructive inspection, security inspection industry and other occasions. The dual (multiple) energy mode is an important function of the X-ray system. The system uses rays of different voltage levels to irradiate the same part two (multiple) times, and calculates the relevant information of the object according to the results of the two (multiple) groups of rays. Or perform imaging without relying on the accuracy of pre-specified parameters like traditional X-ray systems. This mode has been widely used in dual-energy CT, bone densitometer and material identification. [0003] In the application proce...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/02H05G1/32
CPCG05B13/024H05G1/32
Inventor 陈国柱赵钧伍梁林弘毅吴世杰
Owner ZHEJIANG UNIV
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