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High intensity discharge lamp ballast apparatus

A technology for lighting devices and discharge lamps, applied in the use of discharge lamps and gas discharge lamps, lighting devices, etc., which can solve the problems that hinder the small size and low cost of high-intensity discharge lamp devices, increase the price of circuit components, transformers and capacitors, etc.

Inactive Publication Date: 2005-03-09
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the transformer and the capacitor are large and expensive, and circuit elements are increased, which hinders the miniaturization and low cost of the high-intensity discharge lamp device.

Method used

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  • High intensity discharge lamp ballast apparatus
  • High intensity discharge lamp ballast apparatus
  • High intensity discharge lamp ballast apparatus

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Embodiment Construction

[0023] Embodiments of the present invention will be described below.

[0024] Embodiment 1

[0025] FIG. 1 is a circuit diagram showing the configuration of a metal halide lamp lighting device 100 (high intensity discharge lamp lighting device) according to Embodiment 1. As shown in FIG. As shown in the figure, the metal halide lamp lighting device 100 includes a DC power source 10 such as a storage battery, a smoothing capacitor 20, a DC / AC step-up circuit 30 (DC / AC inverter), a first resonance circuit 40, a high-voltage pulse generator 50, The second resonant circuit 60 and the lighting control circuit 70 .

[0026] The DC / AC step-up circuit 30 includes FETs (Field Effect Transistors) 31 and FETs 32 (switching elements), and a DC / AC converter transformer 33 (transformer). The FET31 and FET32 are alternately turned on and off by a pulse signal input to the gate from the lighting control circuit 70 . As a result, the current flowing through the primary winding 34 of the DC / ...

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PUM

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Abstract

A compact, low cost high intensity discharge lamp ballast apparatus which can carry out normal ballasting without extinction at discharge start includes a DC-AC inverting booster circuit, a first resonance circuit, and a second resonance circuit. The DC-AC inverting booster circuit includes a DC-AC converter transformer for converting a DC voltage fed from a DC power supply to an AC voltage in response to switching on and off of FETs, boosting the voltage. The first resonance circuit includes a leakage inductance connected in series with the secondary winding of the DC-AC converter transformer, and a first resonant capacitor connected in parallel with the secondary winding. The second resonance circuit includes a metal halide lamp, an ignitor transformer for producing a voltage to start lighting of the metal halide lamp, and a second resonant capacitor.

Description

technical field [0001] The present invention relates to a high intensity discharge lamp lighting device. Background technique [0002] In recent years, metal halide lamps have been used instead of halogen lamps in automobile front lighting and the like. Metal halide lamps are a type of HID (high intensity discharge) bulbs. Compared with halogen lamps, they have the characteristics of high luminous efficiency, high color temperature and long life. Inside the luminous tube of the metal halide lamp, metal halides that combine various metals such as sodium and scandium with halogens such as iodine, and high-pressure xenon and mercury used as starting gases are sealed. In the light emission of the metal halide lamp, the gas xenon first discharges at room temperature, and if the inside of the luminous tube becomes high temperature due to the arc discharge of xenon, the arc discharge is achieved by the mercury evaporated with the temperature rise, and then the inside of the tube b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/24H05B41/288H05B41/38
CPCH05B41/2886Y10S315/07Y02B20/202Y02B20/204H05B41/2881H05B41/388Y02B20/00
Inventor 泉喜久夫原田茂树岩田明彦大泽孝
Owner MITSUBISHI ELECTRIC CORP
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