Settler of high-strength discharge lamp

Abstract

Including a power pack and an inversion unit, the stabilizer possesses following parts: four-throw switch connected to the power pack, electric control switch of resisting voltage composed of at least a high voltage diode and a electric control switch connected each other in parallel, high-voltage ignition unit connected to electric control switch of resisting voltage, current sensing unit connected to the inversion unit and a control circuit connected to the inversion unit. High voltage insulating oil is filled into inside case of the electric control switch. Thus, the electric control switch is capable of resisting high voltage and possessing property of conducting AC electricity. The power pack, the high-voltage ignition unit and the electric control switch of resisting voltage in use for controlling operations of each unit / switch constitute architecture of parallel circuit in high voltage.

Description

technical field [0001] The present invention relates to electronic circuits, in particular to a ballast for high-intensity discharge lamps. Background technique [0002] Press, High Intensity Discharge Lamp (HID, High Intensity Discharging Lamp), is a kind of gas discharge lamp, which needs to be started with high voltage, but in the steady state after starting, because it does not have the ability of current self-control, and its luminous characteristics are easily affected by voltage or The impact of frequency changes will lead to changes in the characteristics of the HID lamp or shorten the life of the lamp. Therefore, electronic ballasts must be relied on to solve the aforementioned problems. [0003] However, the known ballasts are only suitable for general gas discharge lamps. For higher-voltage HID lamps, such as those used in projectors and car headlights, special circuits from international manufacturers are required, and the product cost is relatively high. , the ...

AI Technical Summary

Problems solved by technology

[0006] 1. The output of the flyback converter changes too much from 15-310V, making it more difficult and costly

[0007] 2. The four switches in the full-bridge converter must withstand a voltage greater than 500V. This type of component has high cost, high operating temperature and low reliability.

[0008] 3. The high-voltage ignition circuit adopts a series type. The number of turns of the secondary side coil of the transformer T3 is small, and the wire diameter is large, so the impedance will be small. However, this will make the induction between the primary side and the secondary side coil difficult, and the manufactured The stability and consistency are poor, the quality is difficult to control, and the switch (78) of T3 must handle a voltage greater than 2KV, so it is necessary to use a high unit price Spark Gap component, however, it is easy to damage, and most of the faults are Caused by Spark Gap

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