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Active anti-strong surge emi filter with magnetic integration

A magnetic integration and filter technology, which is applied in the field of active anti-strong surge EMI filter, can solve problems such as limited anti-surge ability and LED street lamp extinguishing accidents, and achieve the effect of strong anti-surge ability and enhanced filtering ability

Inactive Publication Date: 2017-02-01
深圳市美吉星集成科技有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The traditional EMI filter uses a common-mode inductor filter to filter out common-mode interference and a differential-mode inductor filter to filter out differential-mode interference. Large-scale light-off accidents are prone to occur during thunderstorm interference and surge shocks

Method used

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  • Active anti-strong surge emi filter with magnetic integration

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Embodiment Construction

[0016] Specific embodiments of the present invention will be described in detail below, but this does not constitute a limitation to the protection scope of the present invention.

[0017] Such as figure 1 As shown, the input power line ~ L is connected to the safety capacitor Cx through the fuse F, and then connected to the input power line ~ N. The safety capacitor Cx is connected in parallel with the varistor RV. This is a conventional connection. Then, the common-mode capacitor Cy1, the capacitor Cy2 and the capacitor Cy0 are star-connected, and the corresponding output terminal capacitor common-mode Cy11, the capacitor Cy22 and the capacitor Cy02 are star-connected, and the inductor L1 and the inductor L2 form a common-mode filter.

[0018] In addition, the safety capacitor Cx, the inductor L1 and the inductor L2 correspond to the output capacitor Cx2 to form a differential mode filter.

[0019] The magnetic integrated active anti-surge circuit is as follows: the seconda...

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Abstract

The invention discloses a magnetically integrated active anti-strong surge EMI filter, including a common mode filter, a differential mode filter, and a magnetically integrated active anti-surge circuit; the input power line ~ L is connected to a safety capacitor through a fuse F Cx is then connected to the input power line ~ N, the safety capacitor Cx is connected in parallel with the varistor RV, the common-mode capacitor Cy1, the capacitor Cy2 and the capacitor Cy0 are connected in star form, and the corresponding output terminal capacitor common-mode Cy11, capacitor Cy22 and capacitor Cy02 are star-shaped Connection method, with inductor L1 and inductor L2, constitutes a common-mode filter; safety capacitor Cx, inductor L1, inductor L2 and output capacitor Cx2, constitutes a differential-mode filter; magnetic integrated active anti-surge circuit adopts active trigger two-way controllable The silicon is short-circuited instantaneously, and when the AC power supply crosses zero, it will return to the normal state of breaking the circuit, so that it will actively shut down the damage of the surge in an instant, and realize the active anti-strong surge.

Description

technical field [0001] The invention belongs to the technical field of EMI filters, in particular to a magnetically integrated active anti-strong surge EMI filter. [0002] technical background [0003] The traditional EMI filter uses a common-mode inductor filter to filter out common-mode interference and a differential-mode inductor filter to filter out differential-mode interference. In the impact of thunderstorm interference and surge, it is easy to cause large-scale light-off accidents. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide an enhanced filtering capability, which can actively shut down the damage of the surge to the subsequent load when the strong surge arrives or before the strong electromagnetic field surge arrives, so as to realize active resistance to strong surges and surge resistance. Active anti-strong surge EMI filter with magnetic integration and strong surge capability. [0005] The pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/12
CPCH02M1/12H02M1/123
Inventor 李俐劼王桂光王希天王建超
Owner 深圳市美吉星集成科技有限公司
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