Control method for electronic ballast of HID light without electrolytic capacitor

Abstract

The invention provides a method for controlling an electronic ballast which is matched with a HID light and has no electrolytic capacitor, the technical proposal adopts a single chip microcomputer software, to generate a multiphase high-frequency wave pulse packet, a plurality of groups of high-frequency square wave impulse with different phases are used to respectively control the and the of a multi-phase electronic power electronic switch, and to realize an active method for restraining dc bus ripple by using active power differential electric energy to substitute the traditional method of restraining the dc bus ripple through by using passive electrolytic capacitor storage charge through realizing a multi-phase high frequency APFC (active power factor Correction) method. Bu adopting the technical proposal, the reliability of the HID light electronic ballast is greatly improved, and the performance price ratio surpasses the traditional HIG light electronic ballast with electrolytic capacitor.

Description

technical field [0001] The invention relates to the field of switching power supplies, in particular to a control method for an electronic ballast without an electrolytic capacitor specially matched to an HID lamp. Background technique [0002] Electric light sources have experienced the era of the first generation of incandescent bulbs that radiate heat from tungsten filaments to incandescent high temperature; the second generation is the era of fluorescent lamps (including straight tube fluorescent lamps and energy-saving lamps) with light efficiency several times higher than that of incandescent bulbs; the third generation is The era of point light source high-intensity discharge lamps (HID lamps) with good light control and high light efficiency; the fourth generation is the era of light-emitting diodes (LED lamps). [0003] Incandescent light bulbs have been eliminated by the tide of energy saving and emission reduction due to their low light efficiency. The world has ...

AI Technical Summary

Problems solved by technology

However, HID lamps cannot be directly connected to the power supply to light up like incandescent bulbs. They must go through the HID lamp ballast (inductive ballast or electronic ballast) that is compatible with the HID lamp before they can be connected to the power supply to light up the HID lamp. The price increase of copper and iron materials provides market space for the development of electronic ballasts for HID lamps. From various aspects of comparison, the inductive ballasts for HID lamps are in terms of power consumption, copper consumption, iron consumption, volume, weight, and abnormal protection. In terms of IT numerical control, it is far inferior to HID lamp electronic ballasts; magnetic ballasts are sensitive to AC frequency, and cannot be used for DC power supplies, while electronic ballasts can be used for DC power supplies, and are adaptable to AC frequency and voltage. The range is very wide, which is not comparable to magnetic ballasts

[0004] However, the reliability of HID lamp magnetic ballast exceeds that of HID lamp electronic ballast

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