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Electric circuit device for driving high voltage discharge lamp

A technology of high-pressure discharge lamps and circuit devices, applied in the use of gas discharge lamps, output power conversion devices, lighting devices, etc., can solve the problems of difficult miniaturization and cost reduction, complex structure, etc., and achieve simplified structure, Effects of improving reliability and reducing costs

Inactive Publication Date: 2007-03-21
任文华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The structure of this circuit device is complicated, and it is difficult to realize miniaturization and cost reduction

Method used

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  • Electric circuit device for driving high voltage discharge lamp
  • Electric circuit device for driving high voltage discharge lamp

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Embodiment Construction

[0019] Describe below in conjunction with embodiment and accompanying drawing:

[0020] FIG. 1 shows a block diagram representation of an embodiment of a circuit arrangement according to the invention. The DC power supply 1 is a DC voltage source, for example, a DC voltage source obtained by bridge rectification of a 50Hz or 60Hz public AC power supply, or a DC voltage source obtained by input filtering, bridge rectification and power factor conversion, Or a DC voltage source obtained by boosting a low-voltage DC power supply (for example, a 12V DC power supply). The DC-AC bridge device 2 is a bridge converter circuit device well known to those skilled in the art, such as a full bridge converter circuit device mainly composed of four power switching elements, or a bridge converter circuit device mainly composed of two A half-bridge converter circuit device composed of power switching elements. The coupled ignition device 3 is also well known to those skilled in the art. For ...

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Abstract

A circuit device used for driving high voltage discharge lamp consists of DC power supply; DC-AC bridged unit; coupled ignition unit and control circuit including low frequency oscillator, PWN controller and driving circuit.

Description

technical field [0001] The invention relates to a control device for a high-pressure discharge lamp. Background technique [0002] High-pressure discharge lamps, such as high-pressure sodium lamps and metal halide lamps, are a commonly used class of high-efficiency light sources. In recent years, the use of high-frequency circuit devices (working frequency greater than 20KHz) to ignite and control the work of high-pressure discharge lamps has become more and more popular, because high-frequency operation greatly reduces the size and weight of circuit devices. [0003] However, when operating at high frequencies, high-pressure discharge lamps are prone to audio frequency resonance, resulting in annoying arc flicker and power instability. The Chinese patent No. 95192614.4 authorized and announced on December 25, 2002 discloses a circuit device that changes the operating frequency of its bridge circuit by detecting relevant circuit parameters to avoid audio frequency resonance...

Claims

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Application Information

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IPC IPC(8): H05B41/288H02M7/537
CPCY02B20/204Y02B20/00
Inventor 任文华
Owner 任文华