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Magnetic integration apparatus for EMI wave filter and preparation method thereof

A magnetic integration and filter technology, applied in the field of filters, can solve problems such as interference, and achieve low cost, simple production, and high cost performance

Inactive Publication Date: 2009-02-18
深圳市美吉星集成科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The power cord of electrical equipment, which not only transfers electrical energy from the power source to the equipment, but also may transmit electrical interference

Method used

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  • Magnetic integration apparatus for EMI wave filter and preparation method thereof
  • Magnetic integration apparatus for EMI wave filter and preparation method thereof
  • Magnetic integration apparatus for EMI wave filter and preparation method thereof

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Experimental program
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Embodiment Construction

[0017] The technical solutions of the present invention will be further described in detail below in conjunction with the drawings and embodiments.

[0018] control figure 1 , which includes the first common-mode inductor Ly 11 / / Ly 12 with Cy 11 and Cy 11 Combined into a common-mode filter at the input; the second common-mode inductor Ly 21 / / Ly 22 with Cy 21 and Cy 22 Combined into an output common-mode filter; in the middle of the above two sets of common-mode filters, insert two unsaturated core differential-mode inductors Lx 1 and Lx 2 , with Cx 1 、Cx 2 、Cx 3 、Cx 4 Form a double π-type differential mode filter, figure 1 The advanced EMI filter can not only prevent the interference from the power supply direction from propagating to the output end, but also prevent the interference generated by electrical equipment from propagating to the input end, without causing grid interference and public hazards.

[0019] However, figure 1 Although the performance is b...

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PUM

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Abstract

Provided is a magnetic integrated device of an EMI wave filter and preparing method thereof, the device replaces a plurality of magnetic cores in EMI with one integrated magnetic core, the integrated magnetic core is obtained by that the magnetic core like Chinese character 'Tian' vertical to the upper and the lower of the middle point position of the magnetic core strip is respectively provided with interspaces delta 1 and delta 2, the magnetic core is winded with four coils which are positioned on two ends of two peripheral vertical magnetic strips and are connected with close taps positioned on the upper coil of the same magnetic strip; the preparing method comprises using a mould to produce four same E-shaped magnetic cores, combining four E-shaped magnetic cores after winding the coils. The invention has advantages of simple structure and production, low cost and high price ratio.

Description

technical field [0001] The invention relates to a filter for EMC electromagnetic compatibility and conduction interference, in particular to a magnetic integration device of an EMI filter and a preparation method thereof. Background technique [0002] The power cord of electrical equipment not only transmits electrical energy from the power source to the equipment, but also may transmit electrical interference. Electrical interference includes: interference between power lines (differential mode interference Ex); and interference between power lines and ground (GND) (common mode interference Ey); in order to block differential mode interference, differential mode inductance Lx and common mode must be used The capacitor Cx forms a differential-mode filter; in order to block common-mode interference, a common-mode inductor Ly and a common-mode capacitor Cy must be used to form a common-mode filter. Combine the differential mode filter and the common mode filter into an EMI fi...

Claims

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Application Information

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IPC IPC(8): H01F17/04H01F27/30
Inventor 申莉萌王希天
Owner 深圳市美吉星集成科技有限公司