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

A technology for electronic ballasts and gas discharge lamps, applied in the field of electronic ballast start-up process control, can solve problems such as bulb deviation, achieve smooth start-up process, ensure accuracy and reliability, and protect life

Active Publication Date: 2012-01-25
HAINING JIANYANG PHOTOELECTRIC TECH
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  • Abstract
  • Description
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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 electronic ballast start-up process control method of the present invention includes a microcontroller and a driver chip, and the microcontroller has an analog-to-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 the bulb, and the DC voltage is converted into an AC through the full-bridge inverter circuit. Voltage is supplied to the bulb, making it work. The microcontroller is connected to the DC-DC conversion circuit and the full-bridge inverter circuit, and the drive chip is connected to the microcontroller and the DC-DC conversion circuit respectively.

[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 sampling the lamp volta...

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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 start-up process of an electronic ballast, in particular, relates to a method for controlling the start-up process of an electronic ballast for a high-intensity gas discharge lamp. Background technique [0002] High-intensity discharge lamps have been used more and more widely 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, and 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 characteristics of the lamps are very different: First, the working characteristics of the high-intensity gas discharge lamps of the sam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B41/36
CPCY02B20/208Y02B20/204Y02B20/00
Inventor 许建炳
Owner HAINING JIANYANG PHOTOELECTRIC TECH
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