Gradient power amplifier

A power amplifier and gradient technology, which is applied in the direction of power amplifiers, can solve the problems of low reliability and achieve the effects of improving reliability, improving withstand voltage, and reducing ripple current

Pending Publication Date: 2020-04-10
HUNAN MAGTECH MEDICAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004]Based on this, it is necessary to provide a gradient power amplifier for the problem of low reliability of the traditional gradient power amplifier

Method used

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Embodiment Construction

[0015] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described more comprehensively through the following embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0016] In one embodiment, see figure 1 , providing a gradient power amplifier, including a PWM sequence generator 100 and an H bridge circuit pair 200, the H bridge circuit pair 200 includes a first group of H bridges 210 and a second group of H bridges 220, and the first group of H bridges 210 includes the same structure The first half bridge and the second half bridge of the second group of H bridges 220 include the first half bridge and the second half bridge of the same structure, the first half bridge of the first group of H bridges 210, the first group of H bridges 210 The...

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Abstract

The invention relates to a gradient power amplifier, which comprises a PWM sequence generator and an H-bridge circuit pair. The H-bridge circuit pair comprises a first group of H bridges and a secondgroup of H bridges with the same structure; the first group of H bridges comprises a first half bridge and a second half bridge which have the same structure; one end of each half bridge after parallel connection is used for accessing bus voltage and the other end is grounded; the first half bridge of the first group of H bridges comprises an even number of switching tubes which are sequentially connected in series; the control end of the switching tube is connected with a PWM sequence generator; the structure of the second group of H bridges is the same as that of the first group of H bridges; the circuit midpoint of each half bridge is respectively connected with two ends of a load; and the PWM sequence accessed by the second group of H bridges is obtained by phase shifting according tothe PWM sequence accessed by the first group of H bridges. According to the gradient power amplifier, the multi-frequency multiplication technology of the switching tube frequency can be equivalentlyrealized, the power of the gradient power amplifier and the equivalent switching frequency of the switching tube are improved, the ripple current is reduced, and the use reliability of the gradient power amplifier is improved.

Description

technical field [0001] The present application relates to the technical field of electronic equipment, in particular to a gradient power amplifier. Background technique [0002] Magnetic Resonance Imaging (MRI) technology integrates modern electromagnetics, atomic physics, quantum mechanics, biochemistry and modern digital signal processing technology, and is one of the concentrated manifestations of the high development of modern science and technology and the high civilization of human society. Compared with other medical imaging methods, magnetic resonance imaging has the characteristics and advantages of high speed, high resolution, multi-parameter and multi-contrast, no invasive injury, no radiation, etc. With the continuous improvement of medical level, nuclear magnetic resonance imaging equipment has been widely used application. The gradient power amplifier is one of the core components of the magnetic resonance imaging system. With the continuous improvement of the...

Claims

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Application Information

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IPC IPC(8): H03F3/20
CPCH03F3/20
Inventor 吴继锋王鹏
Owner HUNAN MAGTECH MEDICAL TECH CO LTD
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