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Circuit system for electronic ballast for fluorescent lamp

A technology of electronic ballast and circuit system, which is applied in the direction of electric lamp circuit arrangement, light source, electric light source, etc., to achieve the effect of EMI suppression

Inactive Publication Date: 2014-01-29
SHAANXI QIYUAN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (2) Electromagnetic noise generated by semiconductor diodes during switching

Method used

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  • Circuit system for electronic ballast for fluorescent lamp
  • Circuit system for electronic ballast for fluorescent lamp
  • Circuit system for electronic ballast for fluorescent lamp

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] As shown in the figure, the fluorescent lamp electronic ballast circuit system of the present invention is composed of an EMI filter circuit, a rectifier circuit, a filter circuit, a power factor correction circuit, a bridge inverter circuit, a starting circuit and a lamp load connected to each other, wherein The EMI filter circuit is composed of differential mode inductor L1, differential mode capacitors C01, C02 and common mode inductor L2. In this circuit, C01=330nF, C02=100nF, Ll=5.6mH, L2=60mH. It has been proved by experiments (such as figure 2 Shown), can get obvious improvement of EMI effect (+10.5dB margin).

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PUM

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Abstract

The invention relates to a ballast circuit for demagnetization, and provides a circuit system for an electronic ballast for a fluorescent lamp. The circuit system comprises an EMI filter circuit, a rectifying circuit, a filter circuit, a power-factor correction circuit, an overbridge inverter circuit, a starting circuit and a lamp load, wherein the EMI filter circuit, the rectifying circuit, the filter circuit, the power-factor correction circuit, the overbridge inverter circuit, the starting circuit and the lamp load are connected with one another; the EMI filter circuit is composed of a difference mode inductor L1, difference mode capacitors C01 and C02 and a common mode inductor L2. Experimental results show that the circuit system can effectively restrain EMI to the circuits and make conducted interference to the circuits reach an international EMC standard limiting value.

Description

technical field [0001] The invention relates to a degaussing ballast circuit. Background technique [0002] Electromagnetic pollution caused by electromagnetic interference (EMI) is the fourth largest pollution after air pollution, water pollution and noise pollution, threatening the safe operation of electronic and electrical equipment and threatening human health and social life, so EMI filtering of electronic ballasts is studied Circuit, making it conform to national standards has great practical significance and application value. [0003] The electromagnetic noise generated by the electronic ballast is transmitted to the power grid through the input power line, causing conduction interference, polluting the surrounding electromagnetic environment, and affecting the normal operation of other electronic equipment or systems in the environment. The electromagnetic interference of electronic ballasts mainly comes from the following aspects: [0004] (1) Inherent noise of ...

Claims

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Application Information

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IPC IPC(8): H05B37/02
Inventor 王梅玫
Owner SHAANXI QIYUAN TECH DEV