CN102348307B - LED street lamp and driving power supply circuit thereof - Google Patents
LED street lamp and driving power supply circuit thereof Download PDFInfo
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- CN102348307B CN102348307B CN201010245816.2A CN201010245816A CN102348307B CN 102348307 B CN102348307 B CN 102348307B CN 201010245816 A CN201010245816 A CN 201010245816A CN 102348307 B CN102348307 B CN 102348307B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting
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Abstract
The invention is suitable for the LED lamp field and provides a LED street lamp and a driving power supply circuit thereof. In an embodiment of the invention, the driving power supply circuit of the LED lamp comprises: an AC/DC constant voltage driving unit and more than one DC/DC constant current driving units. The each DC/DC constant current driving unit corresponds with a LED load with one kind of power and is used to provide a direct current for the corresponding LED load. In this case, when the LED load of the LED lamp is replaced, the whole driving power supply circuit does not need to be replaced and the DC/DC constant current driving unit corresponding to the LED load is only needed to be configured. Therefore, displacement costs of the LED lamp can be substantially reduced.
Description
Technical field
The invention belongs to LED field of light fittings, relate in particular to a kind of LED street lamp and driving power circuit thereof.
Background technology
Along with the LED arrival in illumination epoch, LED street lamp will be used more and more widely, LED street lamp mainly comprises the driving power circuit of LED load and driving LED loaded work piece, existing driving power circuit is an integrated circuit, for the LED load of different capacity, will configure different driving power circuits for it, like this, when displacement occurs in the LED of LED street lamp load, driving power circuit integral body also will be replaced, and can increase so undoubtedly the cost of LED street lamp.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of driving power circuit of LED street lamp, is intended to solve existing LED street lamp and when there is displacement, has the problem that cost is high.
The embodiment of the present invention is achieved in that a kind of driving power circuit of LED street lamp, is used to LED load that continuous current is provided, and described driving power circuit comprises:
Electric main is converted into the galvanic AC/DC constant voltage driver element that capable for LED load is used; And
The output of AC/DC constant voltage driver element described in input termination, LED load described in output termination, described direct current is separately converted to can be for the galvanic more than one DC/DC constant current driving unit of the LED load of different capacity;
Described AC/DC constant voltage driver element comprises:
Electromagnetic interference circuit, the first rectification circuit, low pressure high-frequency ac power conversion circuit, the second rectification circuit and LC filter circuit;
The first input end of described electromagnetic interference circuit and the second input connect respectively power input, the first output of described electromagnetic interference circuit and the second output connect respectively first input end and second input of the first rectification circuit, the second output head grounding of described the first rectification circuit;
The first output of the first rectification circuit described in the input termination of described low pressure high-frequency ac power conversion circuit, converts the direct current of described the first rectification circuit output to low pressure high-frequency alternating current;
The output of low pressure high-frequency ac power conversion circuit described in the input termination of described the second rectification circuit is high-frequency DC by the low pressure high-frequency ac electric rectification of described low pressure high-frequency ac power conversion circuit output;
The output of the second rectification circuit described in the input termination of described LC filter circuit, the output of described LC filter circuit is the output of AC/DC constant voltage driver element;
Described low pressure high-frequency ac power conversion circuit comprises:
PFC hold concurrently PWM high frequency transformer T1, switching tube, PFC hold concurrently pwm control circuit and divider resistance R1;
The hold concurrently armature winding first end of PWM high frequency transformer T1 of described PFC is the input of described low pressure high-frequency ac power conversion circuit, the hold concurrently first end of switching tube described in armature winding the second termination of PWM high frequency transformer T1 of described PFC, the second end of described switching tube is by divider resistance R1 ground connection, the PFC pwm control circuit of holding concurrently described in the control termination of described switching tube, the hold concurrently secondary winding first end of PWM high frequency transformer T1 of described PFC is the output of described low pressure high-frequency ac power conversion circuit, secondary winding the second end ground connection that described PFC holds concurrently PWM high frequency transformer T1.
Another object of the embodiment of the present invention is to provide a kind of LED street lamp that comprises above-mentioned driving power circuit.
In embodiments of the present invention, the driving power circuit of LED street lamp comprises AC/DC constant voltage driver element and more than one DC/DC constant current driving unit, the LED load of the corresponding a kind of power of each DC/DC constant current driving unit, for LED load corresponding thereto provides direct current, like this, when there is displacement in the LED of LED street lamp load, driving power circuit integral body need not be replaced, only need the configuration DC/DC constant current driving unit corresponding with LED load, greatly reduce the displacement cost of LED street lamp.
Accompanying drawing explanation
Fig. 1 is the structure chart of the driving power circuit of the LED street lamp that provides of the embodiment of the present invention;
Fig. 2 is the exemplary circuit figure of the driving power circuit of the LED street lamp that provides of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The embodiment of the present invention provides a kind of LED street lamp, and LED street lamp comprises driving power circuit, and Fig. 1 shows the structure of the driving power circuit of the LED street lamp that the embodiment of the present invention provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention.
The driving power circuit of LED street lamp, is used to LED load that continuous current is provided, and driving power circuit comprises AC/DC constant voltage driver element 100 and more than one DC/DC constant current driving unit;
AC/DC constant voltage driver element 100 is converted into by electric main the direct current that capable for LED load is used;
The output of the input termination AC/DC constant voltage driver element 100 of DC/DC constant current driving unit, output termination LED load, direct current is separately converted to can be for the direct current of the LED load of different capacity.
Illustrate below, the driving power circuit of LED street lamp comprises a DC/DC constant current driving unit 201 and the 2nd DC/DC constant current driving unit 202, certainly according to the needs of LED load, can also comprise a plurality of DC/DC constant current driving unit, the one LED load 301 is different with the power of the 2nd LED load 302, and a DC/DC constant current driving unit 201 and the 2nd DC/DC constant current driving unit 202 are separately converted to direct current can be for the direct current of a LED load 301 and the 2nd LED load 302.
Fig. 2 shows the exemplary circuit structure of the driving power circuit of the LED street lamp that the embodiment of the present invention provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention.
As one embodiment of the invention, AC/DC constant voltage driver element 100 comprises:
The first input end of electromagnetic interference circuit 101 and the second input connect respectively power input, the first output of electromagnetic interference circuit 101 and the second output connect respectively first input end and second input of the first rectification circuit 102, the second output head grounding of the first rectification circuit 102;
The first output of input termination first rectification circuit 102 of low pressure high-frequency ac power conversion circuit 103, converts the direct current of the first rectification circuit 102 outputs to low pressure high-frequency alternating current;
The output of the input termination low pressure high-frequency ac power conversion circuit 103 of the second rectification circuit 104 is high-frequency DC by the low pressure high-frequency ac electric rectification of low pressure high-frequency ac power conversion circuit 103 outputs;
The output of input termination second rectification circuit 104 of LC filter circuit 105, the output of LC filter circuit 105 is the output of AC/DC constant voltage driver element 100.
As one embodiment of the invention, low pressure high-frequency ac power conversion circuit 103 comprises:
PFC hold concurrently PWM high frequency transformer T1, switching tube 1031, PFC hold concurrently pwm control circuit 1032 and divider resistance R1;
The hold concurrently armature winding first end of PWM high frequency transformer T1 of PFC is the input of low pressure high-frequency ac power conversion circuit 103, the first end of armature winding the second termination switching tube 1031 that PFC holds concurrently PWM high frequency transformer T1, the second end of switching tube 1031 is by divider resistance R1 ground connection, the control termination PFC of switching tube 1031 pwm control circuit 1032 of holding concurrently, the hold concurrently secondary winding first end of PWM high frequency transformer T1 of PFC is the output of low pressure high-frequency ac power conversion circuit 103, secondary winding the second end ground connection that PFC holds concurrently PWM high frequency transformer T1.
As one embodiment of the invention, switching tube 1031 is metal-oxide-semiconductor Q1, and the drain electrode of metal-oxide-semiconductor Q1 is the first end of switching tube 1031, and the grid of metal-oxide-semiconductor Q1 is the control end of switching tube 1031, and the source electrode of metal-oxide-semiconductor Q1 is the second end of switching tube 1031.
As one embodiment of the invention, the second rectification circuit 104 is high-frequency rectification diode D1, and the anode of high-frequency rectification diode D1 is the input of the second rectification circuit 104, and the negative electrode of high-frequency rectification diode D1 is the output of the second rectification circuit 104.
As one embodiment of the invention, LC filter circuit 105 comprises:
Inductance L 1 and metal film capacitor C 1;
The first end of inductance L 1 is the input of LC filter circuit 105, and the second end of inductance L 1 is the output of LC filter circuit 105 first end that connects metal film capacitor C 1, the second end ground connection of metal film capacitor C 1.
The structure of each DC/DC constant current driving unit is identical, now take a DC/DC constant current driving unit 201 as example explanation,
As one embodiment of the invention, a DC/DC constant current driving unit 201 comprises:
DC/DC constant-current driven module 2011 and output filtering module 2012;
The first input end of DC/DC constant-current driven module 2011 and the second input connect respectively output and the ground end of AC/DC constant voltage driver element 100, the first output of DC/DC constant-current driven module 2011 and the second output connect respectively first input end and second input of output filtering module 2012, and the first output of output filtering module 2012 and the second output connect respectively positive pole and the negative pole of a LED load 301.
As one embodiment of the invention, output filtering module 2012 comprises:
Inductance L 2 and capacitor C 2;
The first end of capacitor C 2 connects respectively the first output of DC/DC constant-current driven module 2011 and the positive pole of a LED load 301, the second end of capacitor C 2 connects respectively the first end of inductance L 2 and the negative pole of a LED load 301, the second output of the second termination DC/DC constant-current driven module 2011 of inductance L 2.
The one DC/DC constant current driving unit 201 also comprises and is attempted by the first output of DC/DC constant-current driven module 2011 and the diode D2 between the second output, and a DC/DC constant current driving unit 201 also comprises and is attempted by the first output of output filtering module 2012 and the resistance R 2 between the second output.
The driving power circuit of LED street lamp, according to the needs of LED load, can also comprise a plurality of DC/DC constant current driving unit, as the 2nd DC/DC constant current driving unit 202, because the structure of DC/DC constant current driving unit is the same, therefore repeats no more here.
In embodiments of the present invention, the driving power circuit of LED street lamp comprises AC/DC constant voltage driver element and more than one DC/DC constant current driving unit, the LED load of the corresponding a kind of power of each DC/DC constant current driving unit, for LED load corresponding thereto provides direct current, like this, when there is displacement in the LED of LED street lamp load, driving power circuit integral body need not be replaced, only need the configuration DC/DC constant current driving unit corresponding with LED load, greatly reduce the displacement cost of LED street lamp.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a driving power circuit for LED street lamp, is used to LED load that continuous current is provided, and it is characterized in that, described driving power circuit comprises:
Electric main is converted into the galvanic AC/DC constant voltage driver element that capable for LED load is used; And
The output of AC/DC constant voltage driver element described in input termination, LED load described in output termination, described direct current is separately converted to can be for the galvanic more than one DC/DC constant current driving unit of the LED load of different capacity;
Described AC/DC constant voltage driver element comprises:
Electromagnetic interference circuit, the first rectification circuit, low pressure high-frequency ac power conversion circuit, the second rectification circuit and LC filter circuit;
The first input end of described electromagnetic interference circuit and the second input connect respectively power input, the first output of described electromagnetic interference circuit and the second output connect respectively first input end and second input of the first rectification circuit, the second output head grounding of described the first rectification circuit;
The first output of the first rectification circuit described in the input termination of described low pressure high-frequency ac power conversion circuit, converts the direct current of described the first rectification circuit output to low pressure high-frequency alternating current;
The output of low pressure high-frequency ac power conversion circuit described in the input termination of described the second rectification circuit is high-frequency DC by the low pressure high-frequency ac electric rectification of described low pressure high-frequency ac power conversion circuit output;
The output of the second rectification circuit described in the input termination of described LC filter circuit, the output of described LC filter circuit is the output of AC/DC constant voltage driver element;
Described low pressure high-frequency ac power conversion circuit comprises:
PFC hold concurrently PWM high frequency transformer T1, switching tube, PFC hold concurrently pwm control circuit and divider resistance R1;
The hold concurrently armature winding first end of PWM high frequency transformer T1 of described PFC is the input of described low pressure high-frequency ac power conversion circuit, the hold concurrently first end of switching tube described in armature winding the second termination of PWM high frequency transformer T1 of described PFC, the second end of described switching tube is by divider resistance R1 ground connection, the PFC pwm control circuit of holding concurrently described in the control termination of described switching tube, the hold concurrently secondary winding first end of PWM high frequency transformer T1 of described PFC is the output of described low pressure high-frequency ac power conversion circuit, secondary winding the second end ground connection that described PFC holds concurrently PWM high frequency transformer T1.
2. the driving power circuit of LED street lamp as claimed in claim 1, it is characterized in that, described switching tube is metal-oxide-semiconductor, the first end that the drain electrode of described metal-oxide-semiconductor is switching tube, the grid of described metal-oxide-semiconductor is the control end of switching tube, the second end that the source electrode of described metal-oxide-semiconductor is switching tube.
3. the driving power circuit of LED street lamp as claimed in claim 1, it is characterized in that, described the second rectification circuit is high-frequency rectification diode D1, the anode of described high-frequency rectification diode D1 is the input of the second rectification circuit, and the negative electrode of described high-frequency rectification diode D1 is the output of the second rectification circuit.
4. the driving power circuit of LED street lamp as claimed in claim 1, is characterized in that, described LC filter circuit comprises:
Inductance L 1 and metal film capacitor C 1;
The first end of described inductance L 1 is the input of LC filter circuit, and the second end of described inductance L 1 is the output of LC filter circuit the first end that connects metal film capacitor C 1, the second end ground connection of described metal film capacitor C 1.
5. the driving power circuit of LED street lamp as claimed in claim 1, is characterized in that, described DC/DC constant current driving unit comprises:
DC/DC constant-current driven module and output filtering module;
The first input end of described DC/DC constant-current driven module and the second input connect respectively output and the ground end of described AC/DC constant voltage driver element, the first output of described DC/DC constant-current driven module and the second output connect respectively first input end and second input of described output filtering module, and the first output of described output filtering module and the second output connect respectively positive pole and the negative pole of described LED load.
6. the driving power circuit of LED street lamp as claimed in claim 5, is characterized in that, described output filtering module comprises:
Inductance L 2 and capacitor C 2;
The first end of described capacitor C 2 connects respectively the first output of described DC/DC constant-current driven module and the positive pole of described LED load, the second end of described capacitor C 2 connects respectively the first end of described inductance L 2 and the negative pole of described LED load, the second output of DC/DC constant-current driven module described in the second termination of described inductance L 2.
7. a LED street lamp, is characterized in that, described LED street lamp comprises the driving power circuit as described in claim 1--6 any one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010245816.2A CN102348307B (en) | 2010-07-30 | 2010-07-30 | LED street lamp and driving power supply circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010245816.2A CN102348307B (en) | 2010-07-30 | 2010-07-30 | LED street lamp and driving power supply circuit thereof |
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| CN102348307A CN102348307A (en) | 2012-02-08 |
| CN102348307B true CN102348307B (en) | 2014-04-09 |
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| CN103687216A (en) * | 2013-11-29 | 2014-03-26 | 广西玖典电子新材料有限公司 | High-brightness LED lamp |
| CN104302070A (en) * | 2014-11-11 | 2015-01-21 | 杭州华普永明光电股份有限公司 | Direct-drive LED (Light Emitting Diode) illuminating system controlled by integrated control circuit |
| CN105025631A (en) * | 2015-07-28 | 2015-11-04 | 无锡畅欧光电科技有限公司 | Passive intelligent induction LED control device |
| CN106707903B (en) * | 2017-03-16 | 2023-05-16 | 扬州新概念电气有限公司 | Novel permanent magnet mechanism controller of high-voltage circuit breaker |
| CN106993354A (en) * | 2017-03-31 | 2017-07-28 | 苏州市霜地节能科技有限公司 | Capacitance decompression inductance anti-surge circuit |
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