On-line adjustable filament voltage source circuit for magnetic deflection mass spectrometer

A magnetic deflection mass spectrometer and filament voltage technology, which is applied in the field of power electronics, can solve the problems of large volume and heavy weight of the filament power supply, which cannot meet the needs of miniaturization and light weight of the high-reliability magnetic deflection mass spectrometer, and achieve Miniaturized weight, light weight, and the effect of ensuring safety

Active Publication Date: 2014-04-02
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The filament power supply that uses an online adjustable constant current source to power the filament is large in size and heavy in weight, which cannot meet the miniaturization and light weight requirements of a highly reliable magnetic deflection mass spectrometer for portable gas composition detection and space environment detection.

Method used

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  • On-line adjustable filament voltage source circuit for magnetic deflection mass spectrometer
  • On-line adjustable filament voltage source circuit for magnetic deflection mass spectrometer

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Embodiment Construction

[0023] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings and examples. The following examples are only used to illustrate the technical solutions of the present invention more clearly, but not to limit the protection scope of the present invention.

[0024] Such as figure 1 , figure 2 As shown, the technical solution implemented in the present invention is: an online adjustable filament voltage source circuit for a magnetic deflection mass spectrometer, which is characterized in that it includes a controlled linear adjustment circuit 1, a control circuit 2, a feedback circuit 3, an isolation Power conversion circuit 4, rectification circuit 6, filter circuit 7, current telemetry circuit 8;

[0025] The controlled linear adjustment circuit 1, the isolated power conversion circuit 4, the rectifier circuit 6, and the filter circuit 7 are sequentially connected, the filter circuit 7 is also connecte...

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Abstract

The invention belongs to the technical field of power electronics, and particularly relates to an on-line adjustable filament voltage source circuit for a magnetic deflection mass spectrometer. A controlled linear regulator circuit, a current feedback remote metering circuit and a working mode that filament power supply voltage slowly raises to the required working voltage from extremely low working voltage along the action of a control signal are adopted, a method for supplying power by a voltage source replaces a method for supplying power by a constant current source needed because the cold resistance of a filament is far smaller than the hot resistance, and the on-line adjustable filament voltage source circuit has the capacity of adjusting the electron emissivity of the filament online; a power supply circuit of the filament is isolated from other circuits, so that the filament voltage source can be applied to high voltage environment. The on-line adjustable filament voltage source circuit ensures that a filament supply is adjustable online, high in reliability, miniaturized and light.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to an online adjustable filament voltage source circuit for a magnetic deflection mass spectrometer. Background technique [0002] The filament is an important component of the magnetic deflection mass spectrometer. The characteristic of the filament is that the resistance of the cold state is much smaller than that of the hot state. The current power supply of the filament of the magnetic deflection mass spectrometer is powered by a constant current source to prevent the power supply of the constant voltage source from being in the cold state. When it is small, it burns the filament. The high-performance magnetic deflection mass spectrometer requires the constant current source to be able to adjust the output current value online. The filament power supply that uses an online adjustable constant current source to power the filament is large in size and heavy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/288H05B41/36
CPCY02B20/202Y02B20/00
Inventor 郭显鑫刘克承王卫国李德全郭美如
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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