HID electronic ballast and lighting device with same

Abstract

The invention provides an improved HID electronic ballast and a lighting device with the same. The HID electronic ballast provides the energy required for turning on an HID lamp by using serially-connected high-capacity electrolytic capacitors which serve as energy storage elements, and ensures that the current provided increases correspondingly with the load power, that is, the capacities of the capacitors increase with the load power, and besides, the voltage and current are increased, so as to achieve the effect of turning on the HID lamp.

Description

technical field [0001] The invention relates to an electronic ballast used in a high-pressure gas discharge lamp (HID), in particular to an electronic ballast used in a metal halide lamp belonging to the HID lamp and a metal halide arc tube lighting device using the ballast. Background technique [0002] High-pressure gas discharge lamps (such as metal halide lamps) are often used as light sources for large-area lighting, especially flood lighting, such as lighting for stations, docks, squares, high-rise factories, mines and roads. In principle, it is not only possible but also preferred to use this type of metal halide lamp for daily (such as daily household) lighting. This is because, compared with energy-saving lamps and even LEDs that are widely used at present, metal halide lamps are smaller in size, and are superior to current popular energy-saving lamps in terms of luminous flux, luminous efficiency and color rendering index. Light is even better than the filament of...

AI Technical Summary

Problems solved by technology

Therefore, extremely complex DC / DC conversion, DC / AC full-bridge inverter, PWM control and other circuits are used here to control the acoustic oscillation; due to the start-up process of the metal halide lamp, the electronic ballast is required to provide a sufficiently high driving voltage to generate The arc breaks down to make the mixed gas in the lamp tube glow discharge, and can provide enough energy to convert the glow discharge into arc discharge. It adopts LC series / parallel resonant high voltage pulse ignition circuit and multi-stage in the above circuit Circuits such as DC / DC conversion, DC / AC conversion, and PWM control, as high-pressure gas discharge lamps, have extremely strong electromagnetic interference. Therefore, electromagnetic interference to their own circuits, such as directly affecting the stability of the PWM control system, And EMC, EMI electromagnetic interference to the environment

[0012] The above-mentioned defects have hindered the progress of low-power (such as about 10W) ​​metal halide lamps entering household consumption.

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