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Wide-amplitude voltage regulation and frequency modulation meter

A voltage regulation and frequency regulation, wide-range technology, applied in the direction of instruments, regulation of electrical variables, control/regulation systems, etc. problem, to achieve the effect of security assurance

Inactive Publication Date: 2009-10-07
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this kind of voltage regulator frequency regulator used in the electric power field can generate a lot of power, its frequency regulation field is not very wide, but the regulation within a few hundred hertz cannot cover the middle and high frequencies
[0006] On the other hand, signal generators and other similar devices that can have a wide frequency adjustment range cannot achieve a wide range of voltage adjustment (mostly within 100V).
To sum up, some existing voltage regulation and frequency regulation devices cannot meet the regulation of wide range voltage and frequency

Method used

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Embodiment Construction

[0024]The present invention uses a flyback transformer to generate high voltage. Flyback converter is also known as single-ended flyback or "Buck-Boost" converter. It gets its name because the output terminal obtains energy when the primary winding is disconnected from the power supply. The advantages of the flyback converter are: (1) The circuit is simple and can efficiently provide multiple DC outputs, so it is suitable for multiple sets of output requirements; (2) The conversion efficiency is high and the loss is small; (3) The transformer turns ratio is small; (4) The input voltage is large When fluctuating within the range, it can still have a relatively stable output. At present, the AC input can be realized between 85~300V; the requirement of stable output can be achieved without switching. The disadvantages of the flyback converter are: (1) there is a large ripple in the output voltage, and the load adjustment accuracy is not high, so the output power is limited, and i...

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Abstract

The invention relates to a wide-amplitude voltage regulation and frequency modulation meter which mainly comprises two large parts of a wide-amplitude voltage continuous adjustable flyback switch power circuit and a variable frequency alternating generating circuit. The two circuits are respectively controlled by a TL494 chip. The wide-amplitude voltage controllable flyback switch power generates direct current voltage with continuous adjustable value of 8V to 1000V and high alternating voltage with the continuous adjustable peak-to-peak value of 8V to 1000V; and the frequency variation range of the alternating voltage is 10Hz to 50Hz, thus covering low frequency and medium-high frequency.

Description

technical field [0001] The present invention is an alternating power supply device that can be used for research in various fields such as dielectrophoresis, electrophoresis, and dielectric wetting research. It has a wide voltage range and modulation capability in a wide frequency range. The peak-to-peak value is continuously adjustable from 8V to 1000V, and the frequency adjustment range is continuously adjustable from 10Hz to 50KHz. The DC voltage is continuously adjustable from 8V to 1000V. The maximum output power is 15W. Background technique [0002] The phenomenon of dielectrophoresis was discovered by American physical chemist H.A.Pohl in 1956. Scholar H.A.Pohl observed in experiments that particles suspended in a medium can produce directional motion under the action of a non-uniform electric field, and the direction of motion depends on the dielectric properties of the two. The size of the constant. In the late 1950s and mid-1960s, H.A. Pohl et al. made pioneering...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217H02M3/335H02M7/48
Inventor 曹真宁顾忠泽
Owner SOUTHEAST UNIV
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