CN201479420U - Special driver for LED light source of railway passenger car - Google Patents
Special driver for LED light source of railway passenger car Download PDFInfo
- Publication number
- CN201479420U CN201479420U CN2009201656953U CN200920165695U CN201479420U CN 201479420 U CN201479420 U CN 201479420U CN 2009201656953 U CN2009201656953 U CN 2009201656953U CN 200920165695 U CN200920165695 U CN 200920165695U CN 201479420 U CN201479420 U CN 201479420U
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- circuit
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- light source
- led light
- filter circuit
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Abstract
The utility model discloses a special driver for an LED light source of a railway passenger car, comprising a surge absorbing circuit, an EMT filter circuit, an input rectifying filter circuit, a DC/DC conversion unit, an output rectifying circuit, an output filter circuit, an LED, a signal feedback unit and a drive control circuit which are connected in sequence, wherein the input end and the output end of a voltage sampling unit are respectively connected with the output end of the output filter circuit and the input end of the signal feedback unit; and the output end of the drive control circuit is connected with the input end of the DC/DC conversion unit. As the topological structure of the driver is a single-ended flyback switch power supply, and the surge absorbing circuit is provided, the driver has high performance and high reliability.
Description
Technical field
The utility model relates to a kind of led driver, relates in particular to a kind of passenger train led light source special purpose driver.
Background technology
Because the train industry is a special industry, high to the electronic product instructions for use, its performance is as follows:
1, wide input voltage range: 77V～137.5V;
2, driving power must be wanted the EMC EMC test;
3, driving power must be provided with surge absorbing circuit;
4, driving power must be the power supply of isolating.
Generally use led driver aboard to be difficult to reach above-mentioned requirements at present.
Summary of the invention
The technical problems to be solved in the utility model provides the passenger train led light source special purpose driver of a kind of high-performance, high reliability.
The technical scheme that addresses the above problem is: this passenger train led light source special purpose driver comprises surge absorbing circuit, EMT filter circuit, input rectifying filter circuit, DC/DC converter unit, output rectification circuit, output filter circuit, LED, signal feedback unit, the Drive and Control Circuit that connects successively, the input of voltage sampling unit is connected with the output of output filter circuit and the input of signal feedback unit respectively with output, and the output of Drive and Control Circuit is connected with the input of DC/DC converter unit.
Because the topological structure of this driver is a single-ended reverse exciting switching voltage regulator, and is provided with surge absorbing circuit, so performance height, reliability height.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is a circuit diagram of the present utility model.
Specific embodiments
As shown in Figure 1, this passenger train led light source special purpose driver comprises surge absorbing circuit, EMT filter circuit, input rectifying filter circuit, DC/DC converter unit, output rectification circuit, output filter circuit, LED, signal feedback unit, the Drive and Control Circuit that connects successively, the input of voltage sampling unit is connected with the output of output filter circuit and the input of signal feedback unit respectively with output, and the output of Drive and Control Circuit is connected with the input of DC/DC converter unit.
Preferably, between LED and signal feedback unit, also be provided with constant-current control circuit.
Preferably, also be provided with the protective circuit of output short-circuit, open circuit, overload, it is connected to the signal feedback unit.
Preferably, also be provided with overheated, overvoltage, under-voltage protective circuit, it is connected to Drive and Control Circuit.
Preferably, described LED can be the LED of one or more serial or parallel connections.
Fig. 2 is a circuit diagram of the present utility model.Its operation principle is as follows:
The main topology of this circuit is a single-ended reverse exciting switching voltage regulator, and when switch Q1 conducting, the former limit of transformer TA induced voltage is last negative just down, and rectifier diode DQ is in cut-off state, at this moment former limit stored energy.When switching tube Q1 by the time, the energy that transformer TA is stored, time just winding and rectifier diode DQ and C9, L1, C11 etc. export to load by transformer.
The difference that this circuit and LED drive principle in the past have is: can detect ambient temperature by a NTC resistance R 2, when the ambient temperature of LED driving raises, regulate the output variable of driver, thereby guarantee the normal use of driver.In addition, be in constant current state during this circuit working, size by each road electric current on the transistor Q2 detection light source plate, by this method, can solve the uniformity of driver, can also adopt the driving power of same model when both load is in different size, thus the difficulty that driving power is safeguarded after can reducing, and this moment, the driving power carrying load ability was essential enough certainly.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is done any pro forma restriction; every foundation technical spirit of the present utility model all still belongs to the protection range of technical solutions of the utility model to any simple modification, equivalent variations and modification that above embodiment did.
Claims (5)
1. passenger train led light source special purpose driver, it is characterized in that: this driver comprises surge absorbing circuit, EMT filter circuit, input rectifying filter circuit, DC/DC converter unit, output rectification circuit, output filter circuit, LED, signal feedback unit, the Drive and Control Circuit that connects successively, the input of voltage sampling unit is connected with the output of output filter circuit and the input of signal feedback unit respectively with output, and the output of Drive and Control Circuit is connected with the input of DC/DC converter unit.
2. passenger train led light source special purpose driver according to claim 1 is characterized in that: also be provided with constant-current control circuit between LED and signal feedback unit.
3. passenger train led light source special purpose driver according to claim 1 is characterized in that: also be provided with the protective circuit of output short-circuit, open circuit, overload, it is connected to the signal feedback unit.
4. passenger train led light source special purpose driver according to claim 1 is characterized in that: also be provided with overheated, overvoltage, under-voltage protective circuit, it is connected to Drive and Control Circuit.
5. passenger train led light source special purpose driver according to claim 1 is characterized in that: described LED can be one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201656953U CN201479420U (en) | 2009-07-27 | 2009-07-27 | Special driver for LED light source of railway passenger car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201656953U CN201479420U (en) | 2009-07-27 | 2009-07-27 | Special driver for LED light source of railway passenger car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201479420U true CN201479420U (en) | 2010-05-19 |
Family
ID=42415675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201656953U Expired - Lifetime CN201479420U (en) | 2009-07-27 | 2009-07-27 | Special driver for LED light source of railway passenger car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201479420U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102740538A (en) * | 2011-04-13 | 2012-10-17 | 海洋王照明科技股份有限公司 | Led drive circuit |
-
2009
- 2009-07-27 CN CN2009201656953U patent/CN201479420U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102740538A (en) * | 2011-04-13 | 2012-10-17 | 海洋王照明科技股份有限公司 | Led drive circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: LANP ELECTRIC CO., LTD. Free format text: FORMER NAME: LANPU ELECTRIC APPLIANCE CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 325600 Yueqing Economic Development Zone, Zhejiang Patentee after: LANP Electric Co., Ltd. Address before: 325600 Yueqing Economic Development Zone, Zhejiang Patentee before: LANP Electrical Co.,Ltd |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100519 |
|
| CX01 | Expiry of patent term |