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Gradient amplifier power unit, gradient amplifier and magnetic resonance imaging system

A gradient amplifier and power unit technology, applied to output power conversion devices, AC power input conversion to DC power output, electrical components, etc., can solve the problems of different output currents, power module damage, and power module heat generation. , to achieve cost reduction, small footprint and low cost

Active Publication Date: 2016-06-22
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the factory parameters of each power module cannot be completely consistent, so the output current of two parallel-connected power modules will also be different
In actual use, a power module with a large output current generates more heat, which may eventually lead to damage to the power module

Method used

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  • Gradient amplifier power unit, gradient amplifier and magnetic resonance imaging system
  • Gradient amplifier power unit, gradient amplifier and magnetic resonance imaging system
  • Gradient amplifier power unit, gradient amplifier and magnetic resonance imaging system

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Embodiment Construction

[0037] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0038] An embodiment of the present invention provides a power unit of a gradient amplifier, referring to Figure 1-5 ,include:

[0039] The cooling plate 10 takes away the heat generated by each device in the power unit by means of cooling liquid (such as water), so that each device can work in a safe temperature range and ensure the working safety of the power unit;

[0040] Four power modules 20 are arranged on the cooling plate 10 to form an H-bridge structure, and each half bridge of the H-bridge structure includes two power modules 20 . Specifically, four power modules 20 are arranged side by side, which can save space;

[0041] The driving board 30 is located on the other side of the power module 20 relative to the cooling plate 1...

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Abstract

The invention relates to a gradient amplifier power unit. The gradient amplifier power unit includes a plurality of power modules, a cooling plate and busbars; the plurality of power modules form an H-bridge structure; each half bridge of the H-bridge structure comprises at least two power modules; the power modules are arranged on the cooling plate; the busbars are connected with the output ends of the half bridges; and current in the same half bridge is outputted through the corresponding busbar in a unified manner. According to the gradient amplifier power unit, the current equalizing characteristic of the busbars is utilized, and the problem of inconsistency of the magnitude of the output current of different power modules can be well solved.

Description

technical field [0001] The invention relates to a gradient amplifier power unit, a gradient amplifier and a magnetic resonance imaging system. Background technique [0002] Nuclear magnetic resonance imaging (Nuclear Magnetic Resonance Imaging, referred to as NMRI) is the application of nuclear magnetic resonance in the medical field, and the system using this technology is called nuclear magnetic resonance imaging system. [0003] The human body is rich in water, and different tissues have different water contents. If the distribution information of these waters can be detected, a relatively complete image of the internal structure of the human body can be drawn. Nuclear Magnetic Resonance Imaging technology is a technology that infers the distribution of water molecules in the human body by identifying the distribution of hydrogen atom signals in water molecules, and then detects the internal structure of the human body. The basic principle of MRI system imaging is: put t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/00H05K7/20
Inventor 李小亮刘慧芳
Owner SHANGHAI UNITED IMAGING HEALTHCARE