Method for controlling start procedure of electric ballast of high-strength air discharge lamp

A technology for electronic ballasts and gas discharge lamps, which is applied in the field of start-up process control of electronic ballasts, can solve problems such as bulb deviation, achieve smooth start-up process, shorten the time of over-power operation of bulbs, and ensure accuracy and reliability. sexual effect

Active Publication Date: 2008-11-12
HAINING JIANYANG PHOTOELECTRIC TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the start-up control of high-intensity gas discharge lamps generally judges the state of the bulb through the start-up time, so as to give a corresponding control strategy. This control method will have a greater impact on different bulbs deviation

Method used

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  • Method for controlling start procedure of electric ballast of high-strength air discharge lamp
  • Method for controlling start procedure of electric ballast of high-strength air discharge lamp
  • Method for controlling start procedure of electric ballast of high-strength air discharge lamp

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Embodiment Construction

[0015] Such as figure 1 As shown, the control system of the starting process control method of the electronic ballast of the present invention includes a microcontroller and a drive chip, and the microcontroller is equipped with an analog-digital signal converter and an EEPROM. The main circuit of the ballast includes a DC-DC conversion circuit and a full-bridge inverter circuit. The DC-DC conversion circuit boosts the DC voltage to obtain a DC voltage suitable for bulb operation. This DC voltage is then converted into an AC through the full-bridge inverter circuit. Voltage is supplied to the bulb to make it work. The microcontroller is connected to the DC-DC conversion circuit and the full-bridge inverter circuit, and the drive chip is respectively connected with the microcontroller and the DC-DC conversion circuit.

[0016] The main principle of the starting process control method of the present invention is to judge the state of the lamp according to the lamp resistance. By sa...

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Abstract

The invention discloses a method for controlling the starting of an electric ballast of a high strength gas discharger lamp. Lamp resistance can be acquired by the method based on the voltage and the current of the lamp. The characteristics of a bulb can be judged and real time control can be achieved according to the lamp resistance. As the state of the lamp can be judged most effectively and correctly by the lamp resistance, the accuracy and the reliability of control can be ensured. The bulb is lighted quickly by controlling the starting of the bulb. The control method can ensure that the starting of the bulb is smooth and the bulb does not flicker. In addition, the service life of the bulb is protected by shortening the time of overpower operation of the bulb as much as possible.

Description

Technical field [0001] This article relates to a method for controlling the starting process of an electronic ballast, in particular, to a method for controlling the starting process of an electronic ballast for high-intensity gas discharge lamps. Background technique [0002] High-intensity gas discharge lamps are more and more widely used due to their high luminous efficiency and long life. However, the negative resistance characteristic of the high-intensity gas discharge lamp makes it impossible to simply connect it to the power supply. It can only be used for lighting when used in conjunction with a ballast. [0003] In some special applications, such as automotive lighting, electronic ballasts are required to ensure that the lights can be turned on quickly. This requires special control of electronic ballasts. But the lamp characteristics are very different: First, the working characteristics of high-intensity gas discharge lamps of the same specification are very different...

Claims

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Application Information

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IPC IPC(8): H05B41/36H05B41/292
CPCY02B20/204Y02B20/208Y02B20/00
Inventor 许建炳
Owner HAINING JIANYANG PHOTOELECTRIC TECH
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