Electronic ballast and controlling apparatus and method for high-performance gas discharging light

Abstract

The invention provides the different control approaches in non-triggering stage, startup stage and steady-state stage for high-strength gas-discharging lamp. In non-triggering stage, to adapt the electronic ballast to the dispersity of triggering voltage of high strength gas-discharging lamp, a automatic scan is used t o gradually increase the triggering voltage until the high strength gas discharging lamp is triggered. In start up stage, a real-time control approach is used. In steady-state stage, to adapt the parameter dispersity of the high strength gas discharging lamp, a constant power control approach is used.

Description

technical field [0001] The present invention relates to the field of electronic equipment and its control technology, in particular to an electronic ballast and a high-intensity gas discharge lamp control device and method in the field of lighting technology and the field of electric energy control and conversion technology. Background technique [0002] High-intensity gas discharge lamps (including high-pressure sodium lamps and metal halide lamps, hereinafter referred to as HID lamps) are an important member of electric light source products. Compared with incandescent lamps, HID lamps have greatly improved their luminous efficiency. However, it is not so easy to maintain the stability and consistency of light color quality. HID lamps have a wide range of applications, such as store lighting, display lighting, commercial street lighting, billboard lighting, and film and television lighting. Due to their large luminous flux and excellent light color performance, they can cr...

AI Technical Summary

Problems solved by technology

[0022] 2. For the same type of HID lamp produced by different manufacturers, the distance between the two electrodes will be quite different, that is, the distance between the two electrodes of the same type of lamp produced by the same manufacturer also has a certain dispersion

[0023] 3. As the use time of the lamp increases, the distance between the two electrodes increases continuously, so the tube pressure also increases

The active power factor correction circuit is used to improve the power factor of the input terminal, reduce the high-order harmonics of the input current, and provide a constant voltage of about 400V for the BUCK converter; the BUCK converter acts as a current and power regulator to make its output current , The voltage and power match the electrical characteristics of the lamp; the inverter converts the output of the BUCK converter into the AC signal required by the HID lamp, so this electronic ballast has the following disadvantages: many links, resulting in low efficiency, electromagnetic Great interference

[0026] One of the modulation techniques is an intermediate frequency modulation technique. Electronic ballasts work in a certain frequency band greater than 20kHz and less than 100kHz, using frequency modulation, angle modulation and amplitude modulation. Electronic ballasts use this intermediate frequency modulation technology. The purpose is to distribute the spectrum of the output power in a certain frequency band, so as to avoid the "acoustic resonance" phenomenon of the HID lamp due to the excessive concentration of the power spectrum. The main disadvantages of the electronic ballast using this intermediate frequency modulation technology include: control circuit Complicated and not universally applicable to HID lamps of various specifications, types and models. (Reference is: United States Patent, US, 6,184,633B1)

The main disadvantages of electronic ballasts using this high-frequency modulation technology are: low efficiency, large electromagnetic interference, and it is difficult to meet the requirements of relevant international and national standards

[0028] Currently commonly used control technology, when the output power of the electronic ballast is small, this control technology can basically meet the requirements of the high-intensity discharge lamp and make the system work stably, but the experimental results show that when the output power of the electronic ballast is large , this control technology cannot meet the requirements of high-intensity discharge lamps and the system is difficult to work stably

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