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Asymmetric waveform pulse power supply

An asymmetric waveform and pulse power supply technology, which is applied in the direction of pulse technology, pulse duration/width modulation, electrical components, etc., can solve the problems of high cost, bulky, long detection time, etc.

Inactive Publication Date: 2014-09-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing environmental detection devices have long detection time, bulky size and high cost, which are far from meeting the current daily needs

Method used

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Embodiment Construction

[0022] The specific content of the present invention will be described below in conjunction with the drawings. Unless otherwise specified, in the drawings shown in the present invention, the same reference numerals represent the same devices or components. Although the specific embodiments shown in the present invention provide the best implementation mode, those skilled in the art should understand that the specific embodiments listed herein are only to illustrate the spirit and gist of the present invention, and should not be construed as limiting the scope of the present invention. any restrictions.

[0023] In a High-field Asymmetric Waveform Ion Mobility Spectrometry (FAIMS) system, a pulsed power supply for generating high-frequency high-voltage asymmetric square-wave waveforms is crucial. An ideal asymmetric waveform such as figure 1 As shown, the areas of the upper and lower shaded parts are equal, that is:

[0024] V + ×t 2 =V - ×t 1

[0025] In order to genera...

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Abstract

An asymmetric waveform pulse power supply is used for converting input high-voltage direct currents into asymmetric pulse square waves to be output and comprises an MOSFET half-bridge circuit, a PWM circuit and an isolation drive circuit, wherein the MOSFET half-bridge circuit is formed by MOSFETs and used for inverting the input high-voltage direct currents and then outputting the pulse square waves; the PWM circuit is used for generating a positive path of PWM signals and a negative path of PWM signals; the isolation drive circuit is used for controlling connection and cutoff states of the MOSFETs in the MOSFET half-bridge circuit according to the positive path of PWM signals and the negative path of PWM signals generated by the PWM circuit; the isolation drive circuit comprises isolation transformer which is used for isolating strong current signals in the MOSFET half-bridge circuit from weak current signals in the PWM circuit.

Description

technical field [0001] The invention relates to an asymmetric waveform pulse power supply, in particular to a pulse power supply. Background technique [0002] With the development of society, people's expectations and requirements for the quality of life, especially the quality of the environment, are increasing, which makes the real-time and rapid detection of the environment very important. Existing environmental detection devices have long detection time, bulky size and high cost, which are far from meeting the current daily needs. In order to overcome the shortcomings of existing detection technologies, ion detectors based on High-field Asymmetric Waveform Ion Mobility Spectrometry (FAIMS) technology have high sensitivity, short detection time, wide range of detection substances, and small size. As well as low cost, it can be used for rapid detection of air, toxic gases, water organic pollutants, explosives, chemical warfare agents, etc., and has begun to be widely use...

Claims

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Application Information

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IPC IPC(8): H02M9/02
CPCH02M7/5395G01N27/624H01J49/025H02M1/32H03K7/08H03K17/102H03K17/691
Inventor 钟其水李辉陈达瑾李百华
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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