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Power factor correcting unit with electronic ballast function

A technology of power factor correction and electronic ballasts, which is applied in lighting devices, electric light sources, electrical components, etc., can solve problems such as power consumption, space occupation, and complicated circuits

Inactive Publication Date: 2007-01-31
BENQ CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the circuit of the above-mentioned structure is quite complicated, so that there are disadvantages such as power consumption, space occupation, and cost.

Method used

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  • Power factor correcting unit with electronic ballast function
  • Power factor correcting unit with electronic ballast function
  • Power factor correcting unit with electronic ballast function

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Experimental program
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Embodiment Construction

[0010] Like reference numerals refer to like elements throughout.

[0011] refer to image 3 , is a power factor correction circuit with electronic ballast function of the present invention. exist image 3 In, mainly the figure 2 The ballast circuit in the circuit is redesigned so that when it is connected with the original power factor correction circuit 22, the lighting device 25 and the lamp tube LAMP, it can have the function of the original electronic ballast but does not need the original electronic ballast. The complex circuit, thus producing the power factor correction circuit with electronic ballast function. Such as image 3 As shown, in addition to a rectifier 21 for converting alternating current (AC) into direct current (DC), a power factor correction circuit 22 for adjusting power factor, a lamp 25 for lighting a lamp tube and a lamp for lighting In addition to the lamp tube LAMP, it also includes a voltage / current control circuit 31 . Because except this ...

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PUM

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Abstract

The control circuit capable of generating the function of the electronic ballast is added to the power factor correcting circuit to provide the performances of the electricity and space saving and stability for the system. The correcting circuit comprises following parts. The light tube for lighting. The starter is serial connected to the tube for starting the light tube. The voltage / current controller is serial connected to the two ends of the cascaded tube and the starter in order to receive the voltage at the two ends of the tube as well as send the feed back signal. The power factor correcting circuit connected to the voltage / current controller is parallel adjusts the output power based on the said feed back signal in order to protect the circuit and raise the reliability of the system.

Description

technical field [0001] The present invention relates to a power factor correction device (power factor correction device, PFC), in particular, to a power factor correction device with the function of an electronic ballast, which adds an electronic ballast to a power factor correction circuit The control circuit of the converter function is used to achieve the purpose of reducing harmonic interference, saving power, saving space and stable system reliability. Background technique [0002] The power factor of the ballast is the percentage of effective power that is actually applied to the ballast by an input current. Because the electronic ballast that drives the lamp tube to emit light with high frequency has a higher light output, that is, it saves power, it has replaced traditional ballasts and starters and is widely used, for example, in various projectors superior. Traditionally, the lamp lighting circuit design of a projector usually separates the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B41/282
Inventor 陈启仁
Owner BENQ CORP