CN2271089Y - Low harmonic electronic ballast - Google Patents
Low harmonic electronic ballast Download PDFInfo
- Publication number
- CN2271089Y CN2271089Y CN 96216616 CN96216616U CN2271089Y CN 2271089 Y CN2271089 Y CN 2271089Y CN 96216616 CN96216616 CN 96216616 CN 96216616 U CN96216616 U CN 96216616U CN 2271089 Y CN2271089 Y CN 2271089Y
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- CN
- China
- Prior art keywords
- circuit
- capacitor
- diode
- utility
- low harmonic
- 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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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model provides an electronic ballast for various gas discharge lamps, such as fluorescent lamps, etc. The utility model comprises a rectification circuit, a high frequency oscillation circuit and a special low harmonic circuit, and the low harmonic circuit is characterized in that an electrolytic capacitor is connected with the rectification circuit passing through a diode, a capacitor, and an inductance network. Thus the stored energy of the electrolytic capacitor can be used for supplying part of energy to the high frequency oscillation circuit, preventing the rectification circuit from directly being connected with an electrolytic capacitor with large capacity, and thereby, the distortion of incoming current waveform of an electronic ballast is avoided. The utility model has the advantages of low harmonic content, high power factor, simple circuit, low cost, etc.
Description
The utility model relates to the electric ballast class.
Electric ballast as main energy-conserving product has obtained increasingly extensive application, and the high performance electronic ballast must have the low characteristics of total harmonic distortion of its electric power incoming line electric current.The major measure of the harmonic content of the electric ballast of China reduction now is the filter circuit that the current follow-up circuit type is set, but its total harmonic distortion is still more than 20%.The active power filtering type electric ballast that constitutes as for current employing special integrated chip, although its superior performance, the cost height is not easy to be accepted by the open market.
The purpose of this utility model is to overcome the shortcoming of above-mentioned existing electric ballast and provides a kind of not only harmonic content low, and the also cheap electric ballast of cost.
Fig. 1 is the low harmonic circuit in the circuit of the present utility model.
Fig. 2 is the circuit diagram of a kind of embodiment of the utility model.
The purpose of this utility model reaches by following measures: this electric ballast comprises rectification circuit, high-frequency oscillating circuits, electric capacity C1And C2Be connected on after linking to each other between the positive and negative power supply behind the rectification circuit, it connects mid point and connects load, diode D3With electric capacity C3Rear and inductance L are in parallel1The series connection, two ends of this network respectively with electric capacity C1And electrochemical capacitor C5Anode link to each other diode D4With electric capacity C4Rear and inductance L are in parallel2The series connection, two ends of this network respectively with electric capacity C2And electrochemical capacitor C5Negative terminal link to each other electrochemical capacitor C5Two be connected to high-frequency oscillating circuits.
In foregoing circuit, also can contain two diode D
1, D
2, respectively with capacitor C
1And capacitor C
2Be in parallel.In addition, also can only contain a diode and capacitor C
1Or C
2Be in parallel.
Advantage of the present utility model is:
1. harmonic content is low, the power factor height.The waveform of the utility model inlet wire current is bordering on sine wave, corresponding electric current total harmonic distortion can drop to quite low numerical value, can be lower than 10%, even in production in enormous quantities, the also as easy as rolling off a log total harmonic distortion that guarantees is in the level that is lower than below 15%, and the crest of the high frequency lamp current that it provides has satisfied the requirement of related standards fully than also less than 1.7.
2. circuit is simple, and element is with low cost, and conformity of production is good.
Below in conjunction with accompanying drawing the utility model is described in further detail.
By shown in Figure 2, K
1And K
2Be the power switch pipe of high-frequency oscillating circuits, they can be bipolar transistors, also can be any power tubes such as VDMOS pipe or IGBT pipe.The control circuit of high-frequency oscillating circuits is connected to power tube K
1, K
2The control utmost point, control signal can be to be obtained by the form that swash self-excitation or its; Load can be the combination that has inductance, capacitances in series resonant circuit and fluorescent lamp, also can be the combination that has high frequency transformer circuit and high-pressure discharge lamp (as high-pressure sodium lamp, neon light etc.); Load both can be a branch road, also can be a plurality of parallel branches; Inductance component L in the low harmonic circuit
1, L
2Coiling separately also can realize around two windings on same magnetic core.
Because the unilateal conduction effect of diode, making Rectified alternating current after the rectification be pressed in each pulse period only could charge to electrochemical capacitor in the higher period at voltage, and in pulsating dc voltage drops to the period that is lower than the electrochemical capacitor both end voltage, diode is cut off, and the energy storage of electrochemical capacitor at this moment then provides energy by the hf channel that electric capacity constituted that is in parallel with diode for the higher-order of oscillation.The inductance of being connected makes high-frequency oscillating circuits energy steady operation to the smoothing effect of high-frequency current in addition.Like this, the energy storage of electrochemical capacitor can be supplied with portion of energy to high-frequency oscillating circuits, directly is not connected to big capacity electrochemical capacitor after making rectification circuit again, thereby has avoided the distortion of electric ballast inlet wire current waveform.
In addition, in the utility model, also can include circuits for triggering, the protective circuit of filament preheating circuit and load abnormal etc.
Claims (3)
1. electric ballast of mainly being made up of rectification circuit, high-frequency oscillating circuits is characterized in that:
(1) capacitor C
1And C
2Be connected on after linking to each other between the positive and negative power supply behind the rectification circuit, it connects mid point and connects load;
(2) diode D
3And capacitor C
3Back and inductance L are in parallel
1The series connection, two ends of this network respectively with capacitor C
1And electrochemical capacitor C
5Anode link to each other diode D
4And capacitor C
4Back and inductance L are in parallel
2The series connection, two ends of this network respectively with capacitor C
2And electrochemical capacitor C
5Negative terminal link to each other;
(3) electrochemical capacitor C
5Two be connected to high-frequency oscillating circuits.
2. electric ballast according to claim 1 is characterized in that: contain two diode D in the circuit
1, D
2, respectively with capacitor C
1And capacitor C
2Be in parallel.
3. electric ballast according to claim 1 is characterized in that; Contain a diode in the circuit, with capacitor C
1Or C
2Be in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96216616 CN2271089Y (en) | 1996-06-27 | 1996-06-27 | Low harmonic electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96216616 CN2271089Y (en) | 1996-06-27 | 1996-06-27 | Low harmonic electronic ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2271089Y true CN2271089Y (en) | 1997-12-17 |
Family
ID=33898044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96216616 Expired - Fee Related CN2271089Y (en) | 1996-06-27 | 1996-06-27 | Low harmonic electronic ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2271089Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103687258A (en) * | 2012-09-18 | 2014-03-26 | 陈枕流 | HID electronic ballast and lighting device with same |
-
1996
- 1996-06-27 CN CN 96216616 patent/CN2271089Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103687258A (en) * | 2012-09-18 | 2014-03-26 | 陈枕流 | HID electronic ballast and lighting device with same |
| CN103687258B (en) * | 2012-09-18 | 2016-04-20 | 陈枕流 | The lighting device of HID electronic ballast and formation thereof |
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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 |