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Power converter

A technology of power converters and capacitors, applied in the direction of electrical components, etc., can solve the problems of pollution and interference, low cost, small size, etc., and achieve the effects of good power factor, low total harmonic distortion, and small output ripple

Pending Publication Date: 2021-04-20
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, users have higher and higher requirements for LED drive power, for example, low harmonics, high PF value, no flicker, small size, high efficiency, and low cost. Because ordinary LED drive power adopts traditional bridge rectification, The capacitor filter circuit will cause severe waveform distortion of the AC input current and inject a large number of high-order harmonics into the grid, so the power factor of the grid side is not high, and a large number of high-order harmonics will cause serious harmonic pollution to the grid and other electrical equipment And interference, so that other electrical equipment can not work normally, so in order to reduce harmonic interference, a power factor correction circuit (ie PFC) is added to the LED drive power supply to improve the power factor in the LED drive power supply to reduce harmonic interference

Method used

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Embodiment Construction

[0031] The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the invention, some specific details are set forth in detail. The present invention can be fully understood by those skilled in the art without the description of these detailed parts. In order not to obscure the essence of the present invention, well-known methods, procedures, procedures, components and circuits have not been described in detail.

[0032] Additionally, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

[0033] Meanwhile, it should be understood that in the following description, "circuit" refers to a conductive loop formed by at least one element or sub-circuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "connected to" another eleme...

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Abstract

The invention discloses a power converter, which is characterized in that a passive boost circuit is arranged between a rectification circuit and a resonance circuit, so that the power converter can realize a good power factor and low total harmonic distortion, and output ripples are relatively small so as to adapt to the application occasion of an LED driving power supply.

Description

technical field [0001] The invention relates to power electronics technology, in particular to a power converter. Background technique [0002] In recent years, users have higher and higher requirements for LED drive power, for example, low harmonics, high PF value, no flicker, small size, high efficiency, and low cost. Because ordinary LED drive power adopts traditional bridge rectification, The capacitor filter circuit will cause severe waveform distortion of the AC input current and inject a large number of high-order harmonics into the grid, so the power factor of the grid side is not high, and a large number of high-order harmonics will cause serious harmonic pollution to the grid and other electrical equipment And interference, so that other electrical equipment can not work normally, so in order to reduce harmonic interference, a power factor correction circuit (ie PFC) is added to the LED drive power supply to improve the power factor in the LED drive power supply to...

Claims

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Application Information

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IPC IPC(8): H05B45/38H05B45/36
CPCH05B45/37H05B45/355H05B45/36H05B45/30
Inventor 王龙奇王建新
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD