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Electronic ballast in use for light tunable gas discharge lamp in high intensity

A gas discharge lamp and electronic ballast technology, applied in the field of power electronics, can solve the problems of large capacitance and inductance voltage stress, large capacitance and inductance loss, and high cost, and achieve high operating frequency, increase starting voltage, and low cost. Effect

Inactive Publication Date: 2006-12-06
ZHEJIANG UNIV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0006] The traditional T-type filter can make the inverter stage of the electronic ballast realize the characteristics of a third-order low-pass filter and meet the requirements of deep dimming, but the voltage stress on the capacitor and inductor is large, and the current passing through is large, making the Large losses on capacitors and inductors, high cost

Method used

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  • Electronic ballast in use for light tunable gas discharge lamp in high intensity
  • Electronic ballast in use for light tunable gas discharge lamp in high intensity
  • Electronic ballast in use for light tunable gas discharge lamp in high intensity

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Embodiment Construction

[0014] refer to figure 1 , the present invention mainly consists of a low-pass filter rectifier circuit 2, a power factor correction circuit 3, a bridge inverter circuit 4, a T-shaped filter resonant circuit 5, an isolation drive circuit 7, a start circuit 8, a frequency adjustment circuit 9, and a start control circuit 10 and dimming signal control circuit 11. Among them, the low-pass filter rectifier circuit 2, the power factor correction circuit 3, the bridge inverter circuit 4 and the T-type filter resonance circuit 5 are sequentially connected to form the main circuit of the electronic ballast, the isolation drive circuit 7, the start circuit 8, the frequency adjustment The circuit 9, the starting control circuit 10 and the dimming signal control circuit 11 form the control loop of the electronic ballast, and complete the control functions of starting control and frequency modulation and dimming. 1 is mains electricity.

[0015] The start circuit 8 and the start control...

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Abstract

The invention comprises: a main circuit comprised of a low-pass filer rectifying circuit, a power factor calibrating circuit, a bridge type inverter circuit and a filtering resonance circuit; and a control circuit composed of an insulation drive circuit, a starting circuit, a frequency regulating circuit, a start control circuit, and a light changes controlling circuit; setting a capacitor at the output of the inductor in said filter resonance circuit in order to limit the current passing through the switch tube in the bridge type inverter circuit at the time of starting the high intensity gas discharge lamp.

Description

technical field [0001] The invention belongs to the field of power electronics, and relates to an electronic ballast for high-intensity gas discharge lamps. Background technique [0002] High-intensity discharge lamps (HID), including high-pressure mercury lamps, high-pressure sodium lamps, metal halide lamps, xenon lamps, krypton lamps, etc., have become a It is the third-generation light source after incandescent lamps and fluorescent lamps, and it is used as the main light source for green lighting projects. It has the advantages of wide working voltage range, small size, light weight, no flicker, no noise, high efficiency, high luminous efficiency, good lighting effect, long life, easy dimming and intelligent control, high power factor, etc. Electronic ballasts will gradually replace magnetic ballasts. [0003] Acoustic resonance phenomenon exists in the high frequency operation of gas discharge lamps, which will cause unstable light output,...

Claims

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Application Information

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IPC IPC(8): H05B41/14
Inventor 梁伟霞陈敏姜轶蜂钱照明
Owner ZHEJIANG UNIV
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