Electronic ballast in use for gas discharge lamp

Abstract

The invention comprises: a power network filter, a rectifying and filtering module, an oscillator. Said oscillator adopts self-exciting type oscillating circuit; the drain electrode of MOSFET in the self-exiting type oscillating circuit is connected to a high leakage reactance type oscillating transformer in series, and its source electrode is connected to a high leakage reactance type high frequency transformer; or the collector of the triode is connected to a high leakage reactance oscillating transformer, and its emitting electrode is connected to a high leakage reactance type high frequency transformer in series; the output winding of the high leakage reactance type oscillator and the high frequency transformer are respectively connected to a coupling capacitor in series and then is connected to a discharging lamp.

Description

technical field [0001] The invention belongs to the technical field of electric lamp manufacturing, in particular to an electronic ballast for a gas discharge lamp. Background technique [0002] Since the advent of gas discharge lamps for nearly half a century, after continuous development, from mercury lamps and sodium lamps to metal halide lamps in the past ten years, the luminous characteristics have been continuously improved and perfected, and the lighting device has also changed from bulky inductive ballasts to metal halide lamps. The device has developed into a lightweight electronic ballast. [0003] At present, the electronic ballasts for gas discharge lamps developed at home and abroad all use separate excitation switching circuits to achieve the purpose of outputting high-frequency power. The signal is formed by an integrated circuit, and then drives the half-bridge or full-bridge type Switching power amplifier for feeding gas discharge la...

AI Technical Summary

Problems solved by technology

However, these circuits are relatively complicated, and the integrated circuits that form signals need power supplies and peripheral supporting circuits; half-bridge or full-bridge switching amplifier circuits need two or four high-power semiconductor transistors, and provide DC power for them. Switching amplifiers need supporting peripheral circuits

The circuit is complicated and many electronic components are used

The more electronic components used in any circuit, the more faults will occur, and at the same time, it will increase the difficulty of process layout, reduce the performance of impact resistance, reduce the operating life, high cost, large volume, and put forward ±5 to the AC power supply of the grid. % high requirements, otherwise it is necessary to increase the adjustment circuit of the DC power supply, making the entire electronic ballast more complicated

To sum up, the separately excited electronic ballasts currently used are complicated, have low service life, poor impact resistance and low cost performance. Therefore, the lighting industry in various countries is constantly developing new electronic ballasts to improve the lighting performance of electronic ballasts. performance and price

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