CN2205091Y - Electronic ballast with high power factor - Google Patents

Electronic ballast with high power factor Download PDF

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Publication number
CN2205091Y
CN2205091Y CN 93220137 CN93220137U CN2205091Y CN 2205091 Y CN2205091 Y CN 2205091Y CN 93220137 CN93220137 CN 93220137 CN 93220137 U CN93220137 U CN 93220137U CN 2205091 Y CN2205091 Y CN 2205091Y
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CN
China
Prior art keywords
electronic ballast
power factor
capacitor
high power
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 93220137
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Chinese (zh)
Inventor
江皓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN 93220137 priority Critical patent/CN2205091Y/en
Application granted granted Critical
Publication of CN2205091Y publication Critical patent/CN2205091Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to an electronic ballast with a high power factor, which relates to the improvement of an electronic ballast. A filtering capacitor is removed in the existing electronic ballast, and a tank circuit network is connected with the output end of a rectification circuit, which is composed of a capacitor and a diode. The blocking time of a line current is reduced when the tank circuit network is used by the electronic ballast, and consequently, the power factor is increased. The utility model has the advantages of simple structure and low cost.

Description

Electronic ballast with high power factor
The utility model relates to a kind of electric ballast.
Present at the electric ballast that uses, by rectification circuit, filter capacitor, inverter circuit, current limiting element is formed, and the power frequency civil power is supplied with tube load again through rectification, filtering after inverter circuit is reverse into high frequency, and this electric ballast remains the low problem of power factor.
In view of above-mentioned, the purpose of this utility model aims to provide a kind of high power factor electronic ballast with low cost.
Technical solution of the present utility model is that the filter capacitor in the primary electron ballast is removed, and the accumulator network of being made up of electric capacity and diode in the output connection of rectification circuit forms.Utilize high frequency that the accumulator network is charged and reduce the deadline of line current, realize improving the purpose of power factor.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is a kind of physical circuit figure of the present utility model.
Thick black line partly is the accumulator network among the figure, and it is by the capacitor C that is in series 41, C 42, the diode D that is in series 42, capacitor C 43With the diode D that is connected to two series circuit mid points 41The H type circuit network that constitutes, this network links to each other with rectification circuit output end A, B, and C, D are electronic ballast output end among the figure, connect tube load.
The power frequency civil power is through rectification circuit D 1~D 4After being rectified into direct current, be reverse into high-frequency electrical,, supply with fluorescent tube again through current limiting element L by inverter circuit, and the C in the accumulator 41, C 42Be the capacitance of fluorescent tube, again to capacitor C 43Play the effect of charging dividing potential drop, when the power frequency supply instantaneous voltage was higher, high-frequency current was at C 41With C 42Mid point is introduced accumulator, passes through D 41To C 43The charging energy storage, when the power frequency supply instantaneous voltage is low, C 43Pass through D 42Release energy, provide DC power supply, make inverter continue operate as normal, guarantee lamp luminescence to inverter.For guaranteeing the fluorescent tube stable start, be preferably in capacitor C 41Two end parallel resistance R 41(as shown in Figure 1).Usually, can be at D 41Seal in voltage stabilizing didoe or resistance in the branch road, so that to playing the fine setting effect deadline of line current.
Because the capacitor C in the accumulator network 43Charging voltage be the high frequency voltage of taking after inversion, when the current potential of accumulator input D is lower than C 43The time, because of D 41Existence, can not be to C 43Charging, institute is so that C 43Charging interval elongate, reduce the deadline of line current, thereby improved power factor.This electric ballast is simple in structure, and is with low cost.

Claims (3)

1, a kind of high power factor electronic ballast contains rectification circuit, inverter circuit, and current limiting element is characterized in that also containing accumulator, this accumulator is by the capacitor C that is in series 41, C 42, the diode D that is in series 42, capacitor C 43With the diode D that is connected to the series circuit mid point 41The H type circuit network that constitutes, itself and rectification circuit output end [A, B] link to each other.
2, by the described electric ballast of claim 1, it is characterized in that resistance R is arranged 41With capacitor C 41In parallel.
3, by the described electric ballast of claim 1, it is characterized in that D at H type circuit network 41Seal in voltage stabilizing didoe or resistance in the branch road.
CN 93220137 1993-08-04 1993-08-04 Electronic ballast with high power factor Expired - Fee Related CN2205091Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 93220137 CN2205091Y (en) 1993-08-04 1993-08-04 Electronic ballast with high power factor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 93220137 CN2205091Y (en) 1993-08-04 1993-08-04 Electronic ballast with high power factor

Publications (1)

Publication Number Publication Date
CN2205091Y true CN2205091Y (en) 1995-08-09

Family

ID=33799359

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 93220137 Expired - Fee Related CN2205091Y (en) 1993-08-04 1993-08-04 Electronic ballast with high power factor

Country Status (1)

Country Link
CN (1) CN2205091Y (en)

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee