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Frequency converter structure with built-in EMI circuit

A frequency converter and circuit technology, applied in electrical components, output power conversion devices, cooling/ventilation/heating transformation, etc., can solve the problems of low common-mode suppression ability, heat dissipation, and high temperature in the middle and high frequency bands, and achieve enhanced filtering of noise ability, improved ease of use, and strong filtering capabilities

Active Publication Date: 2017-05-24
DELTA ELECTRONICS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the structure of the above frequency converter has the following disadvantages. First, it is difficult for the fan to dissipate heat from the common-mode inductor, causing its temperature to be too high; Reduced common-mode rejection in mid and high bands

Method used

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  • Frequency converter structure with built-in EMI circuit
  • Frequency converter structure with built-in EMI circuit
  • Frequency converter structure with built-in EMI circuit

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Embodiment Construction

[0064] The detailed description and technical content of the present invention will be described as follows with the accompanying drawings, but the attached drawings are only for illustration purposes and are not intended to limit the present invention.

[0065] Please refer to Figure 1 to Figure 8 As shown, the present invention provides an inverter structure with built-in EMI circuit. The inverter structure 10 mainly includes a box 1 , a fan 2 , a power supply circuit board 3 and an EMI circuit board 4 .

[0066] like Figure 1 to Figure 3 As shown, the box body 1 has a relative top plate 11 and a bottom plate 12, and a partition plate 13 is arranged between the top plate 11 and the bottom plate 12. The partition plate 13 separates the box body 1 into an upper chamber 14 and a lower chamber. The chamber 15 and the bottom plate 12 are made of conductive material. The partition plate 13 is connected with a heat dissipation fin set 131 , and the heat dissipation fin set 131 i...

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Abstract

The embodiment of the invention relates to a frequency converter structure with a built-in EMI circuit. The frequency converter structure comprises a box body, a fan, a power supply circuit board, and an EMI circuit board. The box body has a top plate and a bottom plate opposite to the top plate. A partition plate is arranged between the top plate and the bottom plate. The box body is divided into an upper chamber and a lower chamber by the partition plate. The bottom plate is made of a conductive material. The partition plate is connected to a heat radiation fin group arranged in the lower chamber. The fan is configured and is corresponding to the lower chamber. The power supply circuit board is fixedly connected to the partition plate and is arranged in the upper chamber. The EMI circuit board is attached to the bottom plate and is arranged in the lower chamber. The power supply circuit board is electrically connected to the EMI circuit board. Therefore, the heat radiation efficiency of the frequency converter structure is improved, a ground contact area is increased, and the common mode suppression ability of middle and high frequency bands is effectively improved.

Description

technical field [0001] The invention relates to a frequency converter structure, in particular to a frequency converter structure with a built-in EMI circuit. Background technique [0002] Background technical content. In the industrial industry, the inverter structure is often used to control the motor circuit. Because the switching of the power circuit itself is also a source of interference, in order not to affect the mains, an EMI (Electro Magnetic Interference) filter is added between the power circuit and the input of the mains. So as not to transmit its own interference to the public grid. The connection relationship of the EMI filter should be between the mains and the power circuit, so that the EMI filter can filter out the interference from both directions. [0003] The structure of the traditional inverter mainly includes a plastic shell, a power circuit board, an EMI circuit board, a cooling fin set and a fan. A common-mode inductor, multiple capacitors, multi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00H02M1/44H05K7/20
Inventor 卢弘达杨清奇
Owner DELTA ELECTRONICS INC
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