Transformer for improving the precision of output voltage

An output voltage and accuracy technology, applied in the field of new switching power supply transformers, can solve the problems of increasing the volume and loss of the transformer, large voltage errors, and complicated circuits, and achieves the effect of strong reliability and improved accuracy.

Inactive Publication Date: 2009-10-07
上海力申科学仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the secondary winding is rounded on the result of theoretical calculation, the output voltage error is very large. In order to obtain an accurate voltage, a linear regulator, swi

Method used

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  • Transformer for improving the precision of output voltage
  • Transformer for improving the precision of output voltage
  • Transformer for improving the precision of output voltage

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with accompanying drawing:

[0012] like figure 1 , figure 2 , image 3 As shown, a transformer that improves the accuracy of the output voltage includes a magnetic core 10 and a skeleton 20 matching the magnetic core. The magnetic core includes several side columns (not marked in the figure), a central column 10D, and the several Two side columns are respectively arranged around the central column 10D, the cross-sectional areas of the several side columns are respectively equal and the sum of the cross-sectional areas of the several side columns is equal to the cross-sectional area of ​​the central column 10D, and each side column and the central column 10D The cross-sectional area of ​​the connection part is equal to the cross-sectional area of ​​each side column, the central column 10D is provided with a primary winding and a secondary integer multiple winding, and the several side columns are re...

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Abstract

The invention provides a transformer for improving the precision of output voltage. The transformer comprises a magnetic core and a framework matched with the magnetic core. The magnetic core comprises a plurality of side columns and a central column. The side columns are respectively arranged around the central column. The sectional areas of the side columns are respectively equal and the sum of the sectional areas is equal to the sectional area of the central column, and the sectional area of the connecting part between each side column and the central column is equal to that of each side column. The central column is provided with a primary winding and a secondary integral multiple winding. The side columns are respectively provided with a secondary winding with less than one coil and the secondary winding with less than one coil is evenly distributed on the side columns according to output current. Without the addition of extra linear voltage stabilizing circuits or magnetic amplifiers, the transformer can realize low-voltage and high-current multiplexed output and improves the precision of the output voltage thereof. The transformer is strong in reliability without the increase of volume and consumption.

Description

technical field [0001] The invention relates to a novel switching power supply transformer, in particular to a switching power supply transformer with ultra-low voltage, high current, multi-channel output and no need for linear voltage stabilization in the subsequent stage. Background technique [0002] In order to adapt to the backup power (battery) power supply, modern integrated circuits have lower and lower operating voltages. Many chips now use ultra-low operating voltages, such as 1.8 volts, or even 1.2 volts. However, in order to reduce the size of the current switching power supply, the operating frequency is getting higher and higher. Now the operating frequency of most switching power supplies exceeds 100KHz, and some manufacturers even use the operating frequency of 1MHz. In this way, the number of winding turns of the transformer becomes very small. For the secondary of low voltage output, it is more than one turn, or less than one turn. If it is rounded, the vol...

Claims

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Application Information

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IPC IPC(8): H01F27/24H01F27/30H01F27/28H01F41/02
Inventor 蒲文旭
Owner 上海力申科学仪器有限公司
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