CN2282758Y - Ballast for fluorescent lamp - Google Patents
Ballast for fluorescent lamp Download PDFInfo
- Publication number
- CN2282758Y CN2282758Y CN 95207391 CN95207391U CN2282758Y CN 2282758 Y CN2282758 Y CN 2282758Y CN 95207391 CN95207391 CN 95207391 CN 95207391 U CN95207391 U CN 95207391U CN 2282758 Y CN2282758 Y CN 2282758Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- fluorescent tube
- fluorescent lamp
- voltage multiplying
- relay
- 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
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Abstract
The utility model relates to a ballast for a fluorescent lamp, which is composed of a voltage multiplying rectification glow starting circuit, an alternating current operation circuit, and a control circuit used for circuit switching of the two circuits, wherein, a lamp positive and negative electrode maintaining circuit in the glow starting circuit is connected in parallel with a fluorescent lamp in the operation circuit, the two circuits share one voltage multiplying capacitor and one limiting resistor, the control circuit which is connected in parallel with the limiting resistor is provided with a relay, a normally closed contact of the relay at the negative electrode end of the lamp is conducted with the glow starting circuit, and a normally open contact is connected with the operation circuit. When operated, the utility model can ensure the voltage multiplying glow starting of the fluorescent lamp under a low voltage, both electrodes of the fluorescent lamp can be transmitted by turns under an alternating current state, and thus the operation of the both electrodes is balanced, and the service life of the fluorescent lamp is extended.
Description
The utility model relates to a kind of fluorescent lamp ballast.
At present, fluorescent lamp ballast has three kinds of inductance type, electronic type and voltage multiplying rectifier formulas, wherein voltage multiplying rectifier formula ballast can overcome the shortcoming of inductance type ballast starting performance difference under low-voltage, can overcome the shortcoming that high-frequency impulse that electronic ballast produces can pollute electrical network again, but, voltage multiplying rectifier formula ballast also exists the fluorescent tube life-span short, the shortcoming that the brightness decay is fast, this is because the operating current by fluorescent tube is pulsating direct current behind the multiplication of voltage starter, thereby causes the emitter depletion of fluorescent tube due to overrunning.
The purpose of this utility model provides and a kind ofly can guarantee the fluorescent tube starter under low-voltage, can make fluorescent tube keep fluorescent lamp ballast than long service live again.
This fluorescent lamp ballast is by the voltage multiplying rectifier starting circuit, alternate current operation circuit and starting circuit are formed to the control circuit of operating circuit conversion, wherein be provided with anodal holding circuit of fluorescent tube and fluorescent tube negative pole holding circuit in the voltage multiplying rectifier starting circuit, be provided with fluorescent tube in the alternate current operation circuit, and the voltage multiplying rectifier starting circuit is with shared multiplication of voltage electric capacity of alternate current operation circuit and current-limiting resistance, starting circuit to the control circuit of operating circuit conversion with the current-limiting resistance parallel connection, and by rectification circuit, delay circuit and relay are formed, the fluorescent tube of forming by the anodal holding circuit of fluorescent tube with by fluorescent tube negative pole holding circuit just, the negative pole holding circuit is with the fluorescent tube parallel connection, at negative pole one end of the fluorescent tube normally closed interlock conducting voltage multiplying rectifier starting circuit by relay, the normally open contact of relay then connects the alternate current operation circuit.
Illustrate particular content of the present utility model below in conjunction with drawings and Examples.
Fig. 1: frame principle figure of the present utility model;
Fig. 2: the circuit theory diagrams of the utility model embodiment.
As shown in the figure, fluorescent lamp edge stream device described in the utility model is made up of to the control circuit of operating circuit conversion voltage multiplying rectifier starting circuit, alternate current operation circuit and starting circuit, wherein be provided with anodal holding circuit of fluorescent tube and fluorescent tube negative pole holding circuit in the voltage multiplying rectifier starting circuit, be provided with fluorescent tube R in the alternate current operation circuit, and the voltage multiplying rectifier starting circuit is with the shared multiplication of voltage capacitor C of alternate current operation circuit
1With current-limiting resistance R
1, starting circuit to the control circuit of operating circuit conversion with current-limiting resistance R
1Parallel connection, and be made up of rectification circuit, delay circuit and relay J, the fluorescent tube positive and negative electrode holding circuit of forming by the anodal holding circuit of fluorescent tube with by fluorescent tube negative pole holding circuit be with fluorescent tube R parallel connection, at negative pole one end of the fluorescent tube normally closed interlock J by relay J
1Conducting voltage multiplying rectifier starting circuit, the normally open contact J of relay J
2Then connect the alternate current operation circuit.In the present embodiment, the voltage multiplying rectifier starting circuit is by the multiplication of voltage capacitor C
1, current-limiting resistance R
1, the anodal holding circuit of fluorescent tube and fluorescent tube negative pole holding circuit form, wherein the anodal holding circuit of fluorescent tube is by diode D
5And capacitor C
5Form; Fluorescent tube negative pole holding circuit is by diode D
3, D
4And capacitor C
4Form.The alternate current operation circuit is by the multiplication of voltage capacitor C
1, current-limiting resistance R
1Form with fluorescent tube R; Starting circuit to the control circuit of operating circuit conversion by rectification circuit D
1, R
2, C
2, delay circuit R
3, R
4, C
3, T and relay J form.In ignition stage, because the multiplication of voltage capacitor C
1With the effect of delay circuit, make fluorescent tube R two ends set up the starting voltage and the conducting starter of two multiplication of voltages, the fluorescent tube R operating current of this moment is pulsating direct current.After the circuit conversion, the multiplication of voltage capacitor C
1Only play metering function, but be alternating current by the electric current of fluorescent tube R.In addition, according to technique known, current-limiting resistance R
1Available current-limiting inductance L substitutes, and reaches energy-saving effect, also can adopt resistance R simultaneously
1Come current limliting with inductance L.
The fluorescent lamp ballast of said structure adopts the voltage multiplying rectifier starter, can guarantee fluorescent tube starter under low-voltage, is converted to alternating current work behind the starter again, makes the emission in turn of fluorescent tube the two poles of the earth, and like this, fluorescent tube can keep long working life.
Claims (2)
1, a kind of fluorescent lamp ballast, it is characterized in that: form to the control circuit of operating circuit conversion by voltage multiplying rectifier starting circuit, alternate current operation circuit and starting circuit, wherein be provided with anodal holding circuit of fluorescent tube and fluorescent tube negative pole holding circuit in the voltage multiplying rectifier starting circuit, be provided with fluorescent tube (R) in the alternate current operation circuit, and the voltage multiplying rectifier starting circuit is with the shared multiplication of voltage electric capacity (C of alternate current operation circuit
1) and current-limiting resistance (R
1), starting circuit is to the same current-limiting resistance (R of control circuit of operating circuit conversion
1) parallel connection, and form by rectification circuit, delay circuit and relay (J), by anodal holding circuit of fluorescent tube and the same fluorescent tube of fluorescent tube positive and negative electrode holding circuit (R) parallel connection formed by fluorescent tube negative pole holding circuit, at negative pole one end of fluorescent tube normally closed interlock (J by relay (J)
1) conducting voltage multiplying rectifier starting circuit, the normally open contact (J of relay (J)
2) then connect the alternate current operation circuit.
2, fluorescent lamp ballast according to claim 1 is characterized in that: the anodal holding circuit of described fluorescent tube is by diode (D
5) and electric capacity (C
5) form, described fluorescent tube negative pole holding circuit is by diode (D
3, D
4) and electric capacity (C
4) form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95207391 CN2282758Y (en) | 1995-04-25 | 1995-04-25 | Ballast for fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95207391 CN2282758Y (en) | 1995-04-25 | 1995-04-25 | Ballast for fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2282758Y true CN2282758Y (en) | 1998-05-27 |
Family
ID=33859045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95207391 Expired - Fee Related CN2282758Y (en) | 1995-04-25 | 1995-04-25 | Ballast for fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2282758Y (en) |
-
1995
- 1995-04-25 CN CN 95207391 patent/CN2282758Y/en not_active Expired - Fee Related
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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 |