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Method and device for inspecting electromagnetic compatibility of switch stabilized voltage supply

A technology of switching regulated power supply and electromagnetic compatibility, which is applied to conversion equipment with intermediate conversion to AC, emergency protection circuit devices for limiting overcurrent/overvoltage, electrical components, etc., to achieve low cost and improve electromagnetic resistance The effect of interference

Inactive Publication Date: 2011-08-17
湖南崧顺科技有限公司
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0004] In the prior art, the development and design of switching power supplies generally only seek to meet the above-mentioned IEC standards, but some users need to use the power supply under harsh conditions. In order to ensure that the power supply is not affected by external electromagnetic interference, the power supply is required to have more High electromagnetic immunity, this is where the existing technology needs to be improved

Method used

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  • Method and device for inspecting electromagnetic compatibility of switch stabilized voltage supply
  • Method and device for inspecting electromagnetic compatibility of switch stabilized voltage supply
  • Method and device for inspecting electromagnetic compatibility of switch stabilized voltage supply

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Embodiment Construction

[0025] The features and technical content of the present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments. The drawings are only used to explain the invention and not to limit it.

[0026] see figure 1 , which is a schematic structural diagram of an existing switching regulated power supply circuit. After the AC voltage is rectified and filtered by the rectifying and filtering unit 11, it becomes a DC voltage with a certain pulsation component. This voltage enters the high-frequency conversion unit 12 and is converted into a square wave with the required voltage value. Finally, the square wave voltage enters the width-adjusted square wave. The rectifying and filtering unit 13 becomes the required DC voltage. The control circuit is a pulse width modulator, which is mainly composed of a sampler, a comparator, an oscillator, a pulse width modulation and a reference voltage circuit. This part of the circuit has be...

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Abstract

The invention discloses a method and a device for checking electromagnetic compatibility of a stabilized voltage power supply of a switch. The method comprises the following steps: bridge connecting an RC loop between a primary and a secondary of the power supply; checking the voltage waveform at the both ends of resistators on the RC loop; and judging the electromagnetic compatibility of the stabilized voltage power supply of the switch according to the checked voltage waveform. By the invention, the electromagnetic compatibility of the stabilized voltage power supply of the switch can be checked conveniently and rapidly in a low cost.

Description

technical field [0001] The invention relates to power supply anti-interference technology, in particular to a method and equipment for testing the electromagnetic compatibility of a switching stabilized voltage power supply. Background technique [0002] Switching regulated power supply is an electronic product that uses modern power electronics technology to maintain a stable output voltage by adjusting the duty cycle. It has been more and more widely used in computers, communications, aerospace, color TV, etc. And promote the development of switching regulated power supply in the direction of high reliability, low consumption, low noise, anti-interference and modularization. Switching regulated power supplies can be divided into two categories: AC / DC and DC / DC. AC / DC conversion is to convert AC to DC. [0003] In order to regulate the electromagnetic compatibility of electronic products, all developed countries and some developing countries have formulated electromagnetic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/28H02M3/335H02M1/14H02M1/12G05F1/10H02H9/02H02H9/04
Inventor 陈胜兵许晓喻德茂范继光
Owner 湖南崧顺科技有限公司
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