CN204090210U - A kind of LED drive circuit of adaptive ballast and light fixture - Google Patents
A kind of LED drive circuit of adaptive ballast and light fixture Download PDFInfo
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- CN204090210U CN204090210U CN201420350881.5U CN201420350881U CN204090210U CN 204090210 U CN204090210 U CN 204090210U CN 201420350881 U CN201420350881 U CN 201420350881U CN 204090210 U CN204090210 U CN 204090210U
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Abstract
The utility model is applicable to light fixture and drives field, particularly relates to a kind of LED drive circuit and light fixture of adaptive ballast.In the utility model; the LED drive circuit of adaptive ballast comprises high frequency voltage descending electric capacity C1, high frequency voltage descending electric capacity C2, rectifier bridge D, isolating diode D1, zero load and overvoltage crowbar, high-frequency filter capacitor CX1, high-frequency filter capacitor CX2; what ballast exported is high-frequency and high-voltage alternating current; by current limliting rectification output dc voltage supply LED lamp tube after high frequency capacitance step-down; this LED drive circuit ballast of must arranging in pairs or groups could work; adopt this drive circuit direct LED lamp tube can replace fluorescent tube; without the need to changing ballast, greatly reduce fluorescent tube cost.
Description
Technical field
The utility model belongs to light fixture and drives field, particularly relates to a kind of LED drive circuit and light fixture of adaptive ballast.
Background technology
Present fluorescent lamp, as a kind of conventional lighting, is widely used in the middle of daily life.
But, fluorescent-lamp tube light efficiency is low, contain hazardous substance inside fluorescent tube mercury, along with the requirement of energy-conserving and environment-protective, substituting traditional fluorescent tube by LED lamp tube is a kind of trend, but because fluorescent-lamp tube is necessary and electric ballast collocation uses, if replace traditional fluorescent tube by LED lamp tube, then need to change ballast, greatly can increase the cost of fluorescent tube like this.
Utility model content
The object of the utility model embodiment is the LED drive circuit providing a kind of adaptive ballast, is intended to solve adopt now LED lamp tube to replace fluorescent tube, need change ballast, greatly increase the problem of fluorescent tube cost.
The utility model embodiment is achieved in that a kind of LED drive circuit of adaptive ballast, connects LED lamp tube, and the LED drive circuit of described adaptive ballast comprises:
High frequency voltage descending electric capacity C1, high frequency voltage descending electric capacity C2, rectifier bridge D, isolating diode D1, zero load and overvoltage crowbar, high-frequency filter capacitor CX1, high-frequency filter capacitor CX2;
Described high frequency voltage descending electric capacity C1 and high frequency voltage descending electric capacity C2 is serially connected in and exchanges between live wire and first ac input end of rectifier bridge D; second ac input end of described rectifier bridge D connects interchange ground wire; the anode of isolating diode D1 described in the output termination of described rectifier bridge D; the negative electrode of described isolating diode D1 connects the positive pole of described LED lamp tube; between the negative electrode that described high-frequency filter capacitor CX1 and high-frequency filter capacitor CX2 is connected in parallel on described isolating diode D1 and ground, described zero load and overvoltage crowbar are connected with the anode of described isolating diode D1, negative electrode and ground respectively.
In said structure, described zero load and overvoltage crowbar comprise:
Resistance R1, resistance R2, resistance R3, voltage-stabiliser tube Z1, voltage-stabiliser tube Z2, electric capacity C4 and controllable silicon Q1;
The anode of described controllable silicon Q1 connects the anode of described isolating diode D1, the minus earth of described controllable silicon Q1, the anode of voltage-stabiliser tube Z2 described in the controlled termination of described controllable silicon Q1, the negative electrode of described voltage-stabiliser tube Z2 connects the anode of described voltage-stabiliser tube Z1, the negative electrode of described voltage-stabiliser tube Z1 connects the negative electrode of described isolating diode D1, between the controlled end that described resistance R3 and electric capacity C4 is connected in parallel on described controllable silicon Q1 and ground by the resistance R1 of series connection and resistance R2.
Another object of the utility model embodiment is to provide a kind of light fixture, comprises the LED drive circuit of the adaptive ballast be connected with LED lamp tube, and the LED drive circuit of described adaptive ballast comprises:
High frequency voltage descending electric capacity C1, high frequency voltage descending electric capacity C2, rectifier bridge D, isolating diode D1, zero load and overvoltage crowbar, high-frequency filter capacitor CX1, high-frequency filter capacitor CX2;
Described high frequency voltage descending electric capacity C1 and high frequency voltage descending electric capacity C2 is serially connected in and exchanges between live wire and first ac input end of rectifier bridge D; second ac input end of described rectifier bridge D connects interchange ground wire; the anode of isolating diode D1 described in the output termination of described rectifier bridge D; the negative electrode of described isolating diode D1 connects the positive pole of described LED lamp tube; between the negative electrode that described high-frequency filter capacitor CX1 and high-frequency filter capacitor CX2 is connected in parallel on described isolating diode D1 and ground, described zero load and overvoltage crowbar are connected with the anode of described isolating diode D1, negative electrode and ground respectively.
In said structure, described zero load and overvoltage crowbar comprise:
Resistance R1, resistance R2, resistance R3, voltage-stabiliser tube Z1, voltage-stabiliser tube Z2, electric capacity C4 and controllable silicon Q1;
The anode of described controllable silicon Q1 connects the anode of described isolating diode D1, the minus earth of described controllable silicon Q1, the anode of voltage-stabiliser tube Z2 described in the controlled termination of described controllable silicon Q1, the negative electrode of described voltage-stabiliser tube Z2 connects the anode of described voltage-stabiliser tube Z1, the negative electrode of described voltage-stabiliser tube Z1 connects the negative electrode of described isolating diode D1, between the controlled end that described resistance R3 and electric capacity C4 is connected in parallel on described controllable silicon Q1 and ground by the resistance R1 of series connection and resistance R2.
In the utility model embodiment, the LED drive circuit of adaptive ballast comprises high frequency voltage descending electric capacity C1, high frequency voltage descending electric capacity C2, rectifier bridge D, isolating diode D1, zero load and overvoltage crowbar, high-frequency filter capacitor CX1, high-frequency filter capacitor CX2, what ballast exported is high-frequency and high-voltage alternating current, by current limliting rectification output dc voltage supply LED lamp tube after high frequency capacitance step-down, this LED drive circuit ballast of must arranging in pairs or groups could work, adopt this drive circuit direct LED lamp tube can replace fluorescent tube, without the need to changing ballast, greatly reduce fluorescent tube cost.
Accompanying drawing explanation
Fig. 1 is the structure chart of the LED drive circuit of the adaptive ballast that the utility model embodiment provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 shows the structure of the LED drive circuit of the adaptive ballast that the utility model embodiment provides, and for convenience of explanation, illustrate only the part relevant to the utility model embodiment.
A LED drive circuit for adaptive ballast, connects LED lamp tube, and the LED drive circuit of described adaptive ballast comprises:
High frequency voltage descending electric capacity C1, high frequency voltage descending electric capacity C2, rectifier bridge D, isolating diode D1, zero load and overvoltage crowbar 1, high-frequency filter capacitor CX1, high-frequency filter capacitor CX2;
Described high frequency voltage descending electric capacity C1 and high frequency voltage descending electric capacity C2 is serially connected in and exchanges between live wire and first ac input end of rectifier bridge D; second ac input end of described rectifier bridge D connects interchange ground wire; the anode of isolating diode D1 described in the output termination of described rectifier bridge D; the negative electrode of described isolating diode D1 connects the positive pole of described LED lamp tube; between the negative electrode that described high-frequency filter capacitor CX1 and high-frequency filter capacitor CX2 is connected in parallel on described isolating diode D1 and ground, described zero load and overvoltage crowbar 1 are connected with the anode of described isolating diode D1, negative electrode and ground respectively.
As the utility model one embodiment, described zero load and overvoltage crowbar 1 comprise:
Resistance R1, resistance R2, resistance R3, voltage-stabiliser tube Z1, voltage-stabiliser tube Z2, electric capacity C4 and controllable silicon Q1;
The anode of described controllable silicon Q1 connects the anode of described isolating diode D1, the minus earth of described controllable silicon Q1, the anode of voltage-stabiliser tube Z2 described in the controlled termination of described controllable silicon Q1, the negative electrode of described voltage-stabiliser tube Z2 connects the anode of described voltage-stabiliser tube Z1, the negative electrode of described voltage-stabiliser tube Z1 connects the negative electrode of described isolating diode D1, between the controlled end that described resistance R3 and electric capacity C4 is connected in parallel on described controllable silicon Q1 and ground by the resistance R1 of series connection and resistance R2.
The utility model embodiment also provides a kind of light fixture, comprises the LED drive circuit of the adaptive ballast be connected with LED lamp tube, and the LED drive circuit of described adaptive ballast comprises:
High frequency voltage descending electric capacity C1, high frequency voltage descending electric capacity C2, rectifier bridge D, isolating diode D1, zero load and overvoltage crowbar 1, high-frequency filter capacitor CX1, high-frequency filter capacitor CX2;
Described high frequency voltage descending electric capacity C1 and high frequency voltage descending electric capacity C2 is serially connected in and exchanges between live wire and first ac input end of rectifier bridge D; second ac input end of described rectifier bridge D connects interchange ground wire; the anode of isolating diode D1 described in the output termination of described rectifier bridge D; the negative electrode of described isolating diode D1 connects the positive pole of described LED lamp tube; between the negative electrode that described high-frequency filter capacitor CX1 and high-frequency filter capacitor CX2 is connected in parallel on described isolating diode D1 and ground, described zero load and overvoltage crowbar 1 are connected with the anode of described isolating diode D1, negative electrode and ground respectively.
As the utility model one embodiment, described zero load and overvoltage crowbar 1 comprise:
Resistance R1, resistance R2, resistance R3, voltage-stabiliser tube Z1, voltage-stabiliser tube Z2, electric capacity C4 and controllable silicon Q1;
The anode of described controllable silicon Q1 connects the anode of described isolating diode D1, the minus earth of described controllable silicon Q1, the anode of voltage-stabiliser tube Z2 described in the controlled termination of described controllable silicon Q1, the negative electrode of described voltage-stabiliser tube Z2 connects the anode of described voltage-stabiliser tube Z1, the negative electrode of described voltage-stabiliser tube Z1 connects the negative electrode of described isolating diode D1, between the controlled end that described resistance R3 and electric capacity C4 is connected in parallel on described controllable silicon Q1 and ground by the resistance R1 of series connection and resistance R2.
Ballast exports high-frequency and high-voltage alternating current and is added in AC-AC two ends, by high frequency voltage descending electric capacity C1 and C2 step-down, by rectifier bridge D, high-frequency alternating current is become direct current supply LED lamp tube again, the size of LED lamp tube electric current depends on the size of high frequency voltage descending electric capacity C1 and C2 series capacitance, the electric capacity larger LED lamp tube electric current that high frequency voltage descending electric capacity C1 and C2 connects is larger, high frequency voltage descending electric capacity C1 and C2 connect after total capacity computational methods be: ballast output voltage deduct LED lamp tube voltage again divided by LED lamp tube output current draw be high frequency voltage descending electric capacity C1 and C2 connect capacitive reactance, high frequency voltage descending electric capacity C1 and C2 series connection total capacity is calculated again according to Xc=1/2 π fc, calculate high frequency voltage descending electric capacity C1 and C2 capacity again.
In the utility model embodiment, the LED drive circuit of adaptive ballast comprises high frequency voltage descending electric capacity C1, high frequency voltage descending electric capacity C2, rectifier bridge D, isolating diode D1, zero load and overvoltage crowbar, high-frequency filter capacitor CX1, high-frequency filter capacitor CX2, what ballast exported is high-frequency and high-voltage alternating current, by current limliting rectification output dc voltage supply LED lamp tube after high frequency capacitance step-down, this LED drive circuit ballast of must arranging in pairs or groups could work, adopt this drive circuit direct LED lamp tube can replace fluorescent tube, without the need to changing ballast, greatly reduce fluorescent tube cost.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (4)
1. a LED drive circuit for adaptive ballast, connects LED lamp tube, it is characterized in that, the LED drive circuit of described adaptive ballast comprises:
High frequency voltage descending electric capacity C1, high frequency voltage descending electric capacity C2, rectifier bridge D, isolating diode D1, zero load and overvoltage crowbar, high-frequency filter capacitor CX1, high-frequency filter capacitor CX2;
Described high frequency voltage descending electric capacity C1 and high frequency voltage descending electric capacity C2 is serially connected in and exchanges between live wire and first ac input end of rectifier bridge D; second ac input end of described rectifier bridge D connects interchange ground wire; the anode of isolating diode D1 described in the output termination of described rectifier bridge D; the negative electrode of described isolating diode D1 connects the positive pole of described LED lamp tube; between the negative electrode that described high-frequency filter capacitor CX1 and high-frequency filter capacitor CX2 is connected in parallel on described isolating diode D1 and ground, described zero load and overvoltage crowbar are connected with the anode of described isolating diode D1, negative electrode and ground respectively.
2. the LED drive circuit of adaptive ballast as claimed in claim 1, is characterized in that, described zero load and overvoltage crowbar comprise:
Resistance R1, resistance R2, resistance R3, voltage-stabiliser tube Z1, voltage-stabiliser tube Z2, electric capacity C4 and controllable silicon Q1;
The anode of described controllable silicon Q1 connects the anode of described isolating diode D1, the minus earth of described controllable silicon Q1, the anode of voltage-stabiliser tube Z2 described in the controlled termination of described controllable silicon Q1, the negative electrode of described voltage-stabiliser tube Z2 connects the anode of described voltage-stabiliser tube Z1, the negative electrode of described voltage-stabiliser tube Z1 connects the negative electrode of described isolating diode D1, between the controlled end that described resistance R3 and electric capacity C4 is connected in parallel on described controllable silicon Q1 and ground by the resistance R1 of series connection and resistance R2.
3. a light fixture, is characterized in that, comprises the LED drive circuit of the adaptive ballast be connected with LED lamp tube, and the LED drive circuit of described adaptive ballast comprises:
High frequency voltage descending electric capacity C1, high frequency voltage descending electric capacity C2, rectifier bridge D, isolating diode D1, zero load and overvoltage crowbar, high-frequency filter capacitor CX1, high-frequency filter capacitor CX2;
Described high frequency voltage descending electric capacity C1 and high frequency voltage descending electric capacity C2 is serially connected in and exchanges between live wire and first ac input end of rectifier bridge D; second ac input end of described rectifier bridge D connects interchange ground wire; the anode of isolating diode D1 described in the output termination of described rectifier bridge D; the negative electrode of described isolating diode D1 connects the positive pole of described LED lamp tube; between the negative electrode that described high-frequency filter capacitor CX1 and high-frequency filter capacitor CX2 is connected in parallel on described isolating diode D1 and ground, described zero load and overvoltage crowbar are connected with the anode of described isolating diode D1, negative electrode and ground respectively.
4. light fixture as claimed in claim 3, it is characterized in that, described zero load and overvoltage crowbar comprise:
Resistance R1, resistance R2, resistance R3, voltage-stabiliser tube Z1, voltage-stabiliser tube Z2, electric capacity C4 and controllable silicon Q1;
The anode of described controllable silicon Q1 connects the anode of described isolating diode D1, the minus earth of described controllable silicon Q1, the anode of voltage-stabiliser tube Z2 described in the controlled termination of described controllable silicon Q1, the negative electrode of described voltage-stabiliser tube Z2 connects the anode of described voltage-stabiliser tube Z1, the negative electrode of described voltage-stabiliser tube Z1 connects the negative electrode of described isolating diode D1, between the controlled end that described resistance R3 and electric capacity C4 is connected in parallel on described controllable silicon Q1 and ground by the resistance R1 of series connection and resistance R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420350881.5U CN204090210U (en) | 2014-06-26 | 2014-06-26 | A kind of LED drive circuit of adaptive ballast and light fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420350881.5U CN204090210U (en) | 2014-06-26 | 2014-06-26 | A kind of LED drive circuit of adaptive ballast and light fixture |
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| Publication Number | Publication Date |
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| CN204090210U true CN204090210U (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420350881.5U Expired - Fee Related CN204090210U (en) | 2014-06-26 | 2014-06-26 | A kind of LED drive circuit of adaptive ballast and light fixture |
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| CN (1) | CN204090210U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106793338A (en) * | 2017-01-25 | 2017-05-31 | 浙江东元照明有限公司 | The LED drive circuit of compatible various ballasts |
| CN110557868A (en) * | 2019-09-19 | 2019-12-10 | 横店集团得邦照明股份有限公司 | lamp tube compatible with high frequency and power frequency and implementation method thereof |
-
2014
- 2014-06-26 CN CN201420350881.5U patent/CN204090210U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106793338A (en) * | 2017-01-25 | 2017-05-31 | 浙江东元照明有限公司 | The LED drive circuit of compatible various ballasts |
| CN110557868A (en) * | 2019-09-19 | 2019-12-10 | 横店集团得邦照明股份有限公司 | lamp tube compatible with high frequency and power frequency and implementation method thereof |
| CN110557868B (en) * | 2019-09-19 | 2024-04-05 | 横店集团得邦照明股份有限公司 | Lamp tube compatible with high frequency and power frequency and implementation method thereof |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20150626 |
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| EXPY | Termination of patent right or utility model |