Method for starting HID lamp randomly and control device thereof

Abstract

The invention provides a method for starting HID lamps randomly and a control device thereof. By using a random number seed generated by a singlechip built-in clock to generate a true random number, the invention controls the random start of HIP lamps on the same circuit, thereby greatly improving the reliability and the service life of the existing electronic ballast, and creating favorable conditions for replacing the inductive ballast on a large scale.

Description

Technical field [0001] The invention relates to a method for randomly starting an HID lamp and a control device thereof, belonging to the field of electronic applications. Background technique [0002] High-pressure gas discharge lamps (HID lamps) have excellent electric light source properties such as small size, good spectrum, high luminous efficiency, and long service life, and have become the main light source for lighting roads, stations, docks and other public places. At present, most of the supporting ballasts are high-power magnetic ballasts with poor performance. This kind of ballast has no constant power control, low efficiency, low power factor, and a large surge current at the moment of turning on the light. Because there is no random lighting function, one box transformer can only control 40 magnetic ballasts; the current HID electronic ballasts do not have the function of randomly lighting lights when starting, although the HID lights when starting The surge c...

AI Technical Summary

Problems solved by technology

At present, most of the supporting ballasts are high-power magnetic ballasts with poor performance. This kind of ballast has no constant power control, low efficiency, low power factor, and a large surge current at the moment of turning on the light. Because there is no random lighting function, one box transformer can only control 40 magnetic ballasts; the current HID electronic ballasts do not have the function of randomly lighting lights when starting, although the HID lights when starting The surge current is much smaller than that of magnetic ballasts, but there is also an interference signal at the moment of turning on, and when this interference occurs at the same time, it will cause some electronic ballasts to fail to start normally. In order to overcome this shortcoming, the present invention will The principle of random number is applied to the single-chip microcomputer control system of electronic ballast, and the principle of uncertainty of the single-chip system clock chip in each reading time is used in the starting process of electronic ballast, so as not to increase In the case of the hardware cost of the line control, it not only ensures the reliable start of each HID lamp, but also prolongs the life of the HID lamp and the corresponding control device

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