CN203590040U - Power supply circuit and LED street lamp - Google Patents
Power supply circuit and LED street lamp Download PDFInfo
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- CN203590040U CN203590040U CN201320750099.8U CN201320750099U CN203590040U CN 203590040 U CN203590040 U CN 203590040U CN 201320750099 U CN201320750099 U CN 201320750099U CN 203590040 U CN203590040 U CN 203590040U
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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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model relates to a power supply circuit and an LED street lamp, belonging to the technical field of power supplies. The power supply circuit comprises a three-phase ac interface, an anti-electromagnetic-interface module, an anti-lightning surge module, a first rectification and filter module, a voltage conversion module and a second rectification and filter module which are successively connected. A three-phase ac is input from the three-phase ac interface, and the three-phase ac has relatively strong electric energy conveying capability, thereby reducing the burden of the power supply network; and the voltage conversion module comprises a switch module, a resonance module and a transformer, resonant current generated by the resonance module is used to enable current phase of a switch tube to lag behind voltage, enable the switch module to realize soft switching, reduce switch loss in the voltage conversion module, and further improve the working efficiency of the voltage conversion module.
Description
Technical field
The utility model belongs to power technique fields, particularly a kind of power circuit and LED street lamp.
Background technology
Along with the LED arrival in illumination epoch, LED street lamp is used more and more widely.The power circuit that existing LED street lamp adopts is only equipped with single phase alternating current (A.C.) electrical interface, and adopts single-phase alternating current power supply.But due to the LED street lamp enormous amount that install in a city, in the situation that adopting single-phase alternating current to be LED street lamp power supply, road lamp power supply, the power supply pressure of supply network is very large.
In addition, in existing power circuit, its voltage transformation module adopts hard switching technology, has larger switching loss, and operating efficiency is lower.
Therefore there is, voltage transformation module ineffective problem large to supply network pressure in the power circuit of existing LED street lamp.
Utility model content
The purpose of this utility model is to provide a kind of power circuit, and the power circuit that is intended to solve existing LED street lamp exists, voltage transformation module ineffective problem large to supply network pressure.
The utility model is achieved in that a kind of power circuit, comprises the commercial power interface, anti-electromagnetic interference module, anti-lightning surge module and the first rectification filtering module that connect successively;
Described commercial power interface is the three-phase alternating current electrical interface of access three-phase alternating current;
Described power circuit also comprises:
Input connects the output of described rectification filtering module, receives the first direct current of described the first rectification filtering module output, and described the first direct current is converted to the voltage transformation module of low pressure high-frequency alternating current;
First input end and the second input are connected respectively the first positive output end and second positive output end of described voltage transformation module, and described low pressure high-frequency alternating current is carried out rectifying and wave-filtering processing and generates second galvanic the second rectification filtering module;
The negative output terminal of the output of described the second rectification filtering module and described voltage transformation module is respectively positive output end and the negative output terminal of described power circuit;
Described voltage transformation module comprises switch module, resonance modules and transformer;
The input of described switch module is the input of described voltage transformation module, the input of described resonance modules connects the first output of described switch module, the output of described resonance modules connects the first end of described primary winding, the second output of described switch module connects the second end of described primary winding, and first end, the second end and the tap of the secondary winding of described transformer are respectively the first positive output end, the second positive output end and the negative output terminal of described voltage transformation module.
Another object of the present utility model is also to provide a kind of LED street lamp, comprises LED module, also comprises above-mentioned power circuit.
Power circuit provided by the utility model has comprised the three-phase alternating current electrical interface, anti-electromagnetic interference module, anti-lightning surge module, the first rectification filtering module, voltage transformation module and the second rectification filtering module that connect successively; By three-phase alternating current electrical interface access three-phase alternating current, utilize the power delivery ability that three-phase alternating current is stronger, alleviate the burden of supply network; Wherein, voltage transformation module has comprised switch module, resonance modules and transformer, the resonance current that utilizes resonance modules to produce, allow the current phase of switching tube lag behind voltage, make switch module can realize soft switch, reduce the switching loss in voltage transformation module, and then improved the operating efficiency of voltage transformation module.
Accompanying drawing explanation
Fig. 1 is the modular structure figure of the power circuit that provides of the utility model one embodiment;
Fig. 2 is the exemplary circuit structure chart of the voltage transformation module that provides of the utility model one embodiment;
Fig. 3 is the exemplary circuit structure chart of the second rectification filtering module of providing of the utility model one embodiment;
Fig. 4 is the exemplary circuit structure chart of the first rectification filtering module of providing of the utility model one embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Power circuit provided by the utility model has comprised the three-phase alternating current electrical interface 10, anti-electromagnetic interference module 20, anti-lightning surge module 30, the first rectification filtering module 40, voltage transformation module 50 and the second rectification filtering module 60 that connect successively; There is, voltage transformation module ineffective problem large to supply network pressure in the power circuit that has solved existing LED street lamp.
Fig. 1 shows the modular structure of the power circuit that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant to the utility model embodiment, and details are as follows:
The power circuit that the utility model embodiment provides comprises the commercial power interface, anti-electromagnetic interference module 20, anti-lightning surge module 30 and the first rectification filtering module 40 that connect successively.
In the present embodiment, anti-electromagnetic interference module 20 can adopt the classic applications circuit of this area with anti-lightning surge module 30, or directly adopts existing Electromagnetic interference filter and surge protector, does not repeat them here.
Further, commercial power interface is the three-phase alternating current electrical interface 10 of access three-phase alternating current;
In the utility model embodiment, power circuit also comprises:
Input connects the output of rectification filtering module, receives the first direct current that the first rectification filtering module 40 is exported, and the first direct current is converted to the voltage transformation module 50 of low pressure high-frequency alternating current;
First input end and the second input are connected respectively the first positive output end and second positive output end of voltage transformation module 50, and low pressure high-frequency alternating current is carried out rectifying and wave-filtering processing and generates second galvanic the second rectification filtering module 60;
Wherein, the negative output terminal of the output of the second rectification filtering module 60 and voltage transformation module 50 is respectively positive output end and the negative output terminal of power circuit;
As the utility model one embodiment, voltage transformation module 50 can comprise switch module 501, resonance modules 502 and transformer T1;
The input of switch module 501 is inputs of voltage transformation module 50, the first output of the input connecting valve module 501 of resonance modules 502, the first end of the output connection transformer T1 armature winding of resonance modules 502, the second end of the second output connection transformer T1 armature winding of switch module 501, first end, the second end and the tap of the secondary winding of transformer T1 are respectively the first positive output end, the second positive output end and the negative output terminal of voltage transformation module 50.
The power circuit that the utility model embodiment provides has comprised the three-phase alternating current electrical interface 10, anti-electromagnetic interference module 20, the first rectification filtering module 40, voltage transformation module 50 and the second rectification filtering module 60 that connect successively; By three-phase alternating current electrical interface 10, access three-phase alternating current, utilize the power delivery ability that three-phase alternating current is stronger, alleviate the burden of supply network; Wherein, voltage transformation module 50 has comprised switch module 501, resonance modules 502 and transformer, the resonance current that utilizes resonance modules 502 to produce, allow the current phase of switch tube module lag behind voltage, make switch module 501 can realize soft switch, reduce the switching loss in voltage transformation module 50, and then improved the operating efficiency of voltage transformation module 50.
As the utility model one embodiment, switch module 501 can comprise:
The one NMOS pipe Q1, the 2nd NMOS pipe Q2 and switch control chip U1;
The drain electrode of the one NMOS pipe Q1 is the input of switch module 501, the first control end A1 of the grid connecting valve control chip U1 of the one NMOS pipe Q1, the drain electrode of the source electrode of the one NMOS pipe Q1 and the 2nd NMOS pipe Q2 connects the first output that forms switch module 501 altogether, the second control end A2 of the grid connecting valve control chip U1 of the 2nd NMOS pipe Q2, the source electrode of the 2nd NMOS pipe Q2 is the second output of switch module 501, and the 2nd NMOS pipe source electrode of Q2 and the earth terminal GND of switch control chip U1 are connected to ground altogether.
In the utility model embodiment, switch control chip U1 can be that model is the resonance oscillation semi-bridge conversion chip of L6599D or UCC25600, and according to being connected with other circuit modules its classical connection.
As the utility model one embodiment, resonance modules 502 can comprise the first inductance L 1 and the first capacitor C 1;
The first end of the first inductance L 1 is the input of resonance modules 502, and the second end of the first inductance L 1 connects the first end of the first capacitor C 1, and the second end of the first capacitor C 1 is the output of resonance modules 502.
In the utility model embodiment, the first capacitor C 1 can be thin-film capacitor or leaded multilayer ceramic capacitor;
Concrete, the material of thin-film capacitor can be poly-ethyl ester, polypropylene, polystyrene or poly-carbonic acid.
As the utility model one embodiment, the second rectification filtering module 60 can comprise:
The first diode D1, the second diode D2, the second inductance L 2 and the second capacitor C 2;
The anode of the first diode D1 is the first input end of the second rectification filtering module 60, the anode of the second diode D2 is the second input of the second rectification filtering module 60, the negative electrode of the negative electrode of the first diode D1 and the second diode D2 is connected to the first end of the second inductance L 2 altogether, the second end of the second inductance L 2 and the first end of the second capacitor C 2 connect the output that forms the second rectification filtering module 60, the second end ground connection of the second capacitor C 2 altogether.
In the utility model embodiment, the second capacitor C 2 can be thin-film capacitor or leaded multilayer ceramic capacitor;
Concrete, the material of thin-film capacitor can be poly-ethyl ester, polypropylene, polystyrene or poly-carbonic acid.
As the utility model one embodiment, the first rectification filtering module 40 can comprise:
The 3rd diode D3, the 4th diode D4, the 5th diode D5, the 6th diode D6, the 7th diode D7, the 8th diode D8, the 3rd inductance L 3 and the 3rd capacitor C 3;
The negative electrode of the anode of the 3rd diode D3 and the 4th diode D4 connects the first input end that forms the first rectification filtering module 40 altogether, the negative electrode of the anode of the 5th diode D5 and the 6th diode D6 connects the second input that forms the first rectification filtering module 40 altogether, the negative electrode of the anode of the 7th diode D7 and the 8th diode D8 connects the 3rd input that forms the first rectification filtering module 40 altogether, the negative electrode of the 3rd diode D3, the negative electrode of the negative electrode of the 5th diode D5 and the 7th diode D7 is connected to the first end of the 3rd inductance L 3 altogether, the second end of the 3rd inductance L 3 and the first end of the 3rd capacitor C 3 connect the output that forms the first rectification filtering module 40 altogether, the anode of the 4th diode D4, the anode of the 6th diode D6, the second end of the anode of the 8th diode D8 and the 3rd capacitor C 3 is connected to ground altogether.
In the utility model embodiment, the 3rd capacitor C 3 can be thin-film capacitor or leaded multilayer ceramic capacitor;
Concrete, the material of thin-film capacitor can be poly-ethyl ester, polypropylene, polystyrene or poly-carbonic acid.
In the utility model embodiment, owing to adopting three-phase alternating current power supply, reduced the load pressure of every phase, thereby made power circuit can adopt the non-electrolytic capacitor of low capacity to substitute jumbo electrochemical capacitor.Avoid electrochemical capacitor to have input current phase lag problem, further improved the power factor of power circuit.Also avoided easily aging problem of electrochemical capacitor, the useful life of having improved power circuit simultaneously.In addition, the raising of power factor, the harmonic pollution electrical network of also having avoided power circuit to produce.
Below in conjunction with Fig. 1, to Fig. 4, further illustrate the operation principle of the power circuit that the present embodiment provides:
Power circuit accesses three-phase alternating current by three-phase alternating current electrical interface 10; by anti-electromagnetic interference module 20, three-phase alternating current is carried out to electromagnetic interference inhibition; anti-lightning surge module 30 is carried out surging prevention to power circuit; the first rectification filtering module 40 is by three-phase alternating current electric rectification and carry out filtering; generate the first direct current, then convert direct current to low pressure high-frequency alternating current by voltage transformation module 50.Switch control chip U1 output pulse frequency modulation signal is given a NMOS pipe Q1 and the 2nd NMOS pipe Q2, and a NMOS pipe Q1 and the 2nd NMOS pipe Q2, under the control of switch control chip U1, become direct current into high-frequency alternating current.Wherein, the first inductance L 1 and the first capacitor C 1 produce resonance current, and a NMOS pipe Q1 and the 2nd NMOS pipe Q2 are only at the near zero-crossing point switch of resonance current, thereby realize, no-voltage is opened and zero-current switching, i.e. soft switch technique.Transformer T1 mainly plays step-down, power transmission and insulation isolation.Finally, then by the second current rectifying and wave filtering circuit low pressure high-frequency alternating current is converted to needed the second direct current of user.
At another embodiment of the present utility model, power circuit can also comprise:
Single phase alternating current (A.C.) electrical interface, the second anti-electromagnetic interference module and the 3rd rectification filtering module;
Single phase alternating current (A.C.) electrical interface access single-phase alternating current, the input of the second anti-electromagnetic interference module connects the output of single phase alternating current (A.C.) electrical interface, the input of the 3rd rectification filtering module connects the output of the second anti-electromagnetic interference module, and the output of the 3rd rectification filtering module connects the input of voltage transformation module 50.
In the situation that power circuit is provided with three-phase alternating current electrical interface 10, set up single phase alternating current (A.C.) electrical interface, be convenient to the actual conditions according to supply network, select access three-phase alternating current or single-phase alternating current.Wherein, three-phase alternating current electrical interface 10 all can adopt the mode of flexible connection to be connected with the input of voltage transformation module 50 with single phase alternating current (A.C.) electrical interface, and installs according to the actual requirements.Concrete, can a connector be set at the input of voltage transformation module 50, for connecting two-way commercial power interface.
Another object of the utility model embodiment is also to provide a kind of LED street lamp, comprises LED module, also comprises above-mentioned power circuit.
Wherein, LED module is connected with power circuit, and the electric energy that utilizes power circuit to export is luminous.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (10)
1. a power circuit, comprises the commercial power interface, anti-electromagnetic interference module, anti-lightning surge module and the first rectification filtering module that connect successively, it is characterized in that:
Described commercial power interface is the three-phase alternating current electrical interface of access three-phase alternating current;
Described power circuit also comprises:
Input connects the output of described rectification filtering module, receives the first direct current of described the first rectification filtering module output, and described the first direct current is converted to the voltage transformation module of low pressure high-frequency alternating current;
First input end and the second input are connected respectively the first positive output end and second positive output end of described voltage transformation module, and described low pressure high-frequency alternating current is carried out rectifying and wave-filtering processing and generates second galvanic the second rectification filtering module;
The negative output terminal of the output of described the second rectification filtering module and described voltage transformation module is respectively positive output end and the negative output terminal of described power circuit;
Described voltage transformation module comprises switch module, resonance modules and transformer;
The input of described switch module is the input of described voltage transformation module, the input of described resonance modules connects the first output of described switch module, the output of described resonance modules connects the first end of described primary winding, the second output of described switch module connects the second end of described primary winding, and first end, the second end and the tap of the secondary winding of described transformer are respectively the first positive output end, the second positive output end and the negative output terminal of described voltage transformation module.
2. power circuit as claimed in claim 1, is characterized in that, described switch module comprises:
The one NMOS pipe, the 2nd NMOS pipe and switch control chip;
The drain electrode of a described NMOS pipe is the input of described switch module, the grid of a described NMOS pipe connects the first control end of described switch control chip, the drain electrode of the source electrode of a described NMOS pipe and described the 2nd NMOS pipe connects the first output that forms described switch module altogether, the grid of described the 2nd NMOS pipe connects the second control end of described switch control chip, the source electrode of described the 2nd NMOS pipe is the second output of described switch module, and described the 2nd source electrode of NMOS pipe and the earth terminal of described switch control chip are connected to ground altogether.
3. power circuit as claimed in claim 1, is characterized in that, described resonance modules comprises the first inductance and the first electric capacity;
The first end of described the first inductance is the input of described resonance modules, and the second end of described the first inductance connects the first end of described the first electric capacity, and the second end of described the first electric capacity is the output of described resonance modules.
4. power circuit as claimed in claim 1, is characterized in that, described the second rectification filtering module comprises:
The first diode, the second diode, the second inductance and the second electric capacity;
The anode of described the first diode is the first input end of described the second rectification filtering module, the anode of described the second diode is the second input of described the second rectification filtering module, the negative electrode of the negative electrode of described the first diode and described the second diode is connected to the first end of described the second inductance altogether, the second end of described the second inductance and the first end of described the second electric capacity connect the output that forms described the second rectification filtering module, the second end ground connection of described the second electric capacity altogether.
5. power circuit as claimed in claim 1, is characterized in that, described the first rectification filtering module comprises:
The 3rd diode, the 4th diode, the 5th diode, the 6th diode, the 7th diode, the 8th diode, the 3rd inductance and the 3rd electric capacity;
The negative electrode of the anode of described the 3rd diode and described the 4th diode connects the first input end that forms described the first rectification filtering module altogether, the negative electrode of the anode of described the 5th diode and described the 6th diode connects the second input that forms described the first rectification filtering module altogether, the negative electrode of the anode of described the 7th diode and described the 8th diode connects the 3rd input that forms described the first rectification filtering module altogether, the negative electrode of described the 3rd diode, the negative electrode of the negative electrode of described the 5th diode and described the 7th diode is connected to the first end of described the 3rd inductance altogether, the second end of described the 3rd inductance and the first end of described the 3rd electric capacity connect the output that forms described the first rectification filtering module altogether, the anode of described the 4th diode, the anode of described the 6th diode, the second end of the anode of described the 8th diode and described the 3rd electric capacity is connected to ground altogether.
6. power circuit as claimed in claim 1, is characterized in that, described power circuit also comprises:
Single phase alternating current (A.C.) electrical interface, the second anti-electromagnetic interference module and the 3rd rectification filtering module;
Described single phase alternating current (A.C.) electrical interface access single-phase alternating current, the input of described the second anti-electromagnetic interference module connects the output of described single phase alternating current (A.C.) electrical interface, the input of described the 3rd rectification filtering module connects the output of described the second anti-electromagnetic interference module, and the output of described the 3rd rectification filtering module connects the input of described voltage transformation module.
7. power circuit as claimed in claim 3, is characterized in that, described the first electric capacity is perhaps leaded multilayer ceramic capacitor of thin-film electro;
The material of described thin-film capacitor is poly-ethyl ester, polypropylene, polystyrene or poly-carbonic acid.
8. power circuit as claimed in claim 4, is characterized in that, described the second electric capacity is perhaps leaded multilayer ceramic capacitor of thin-film electro;
The material of described thin-film capacitor is poly-ethyl ester, polypropylene, polystyrene or poly-carbonic acid.
9. power circuit as claimed in claim 5, is characterized in that, described the 3rd electric capacity is perhaps leaded multilayer ceramic capacitor of thin-film electro;
The material of described thin-film capacitor is poly-ethyl ester, polypropylene, polystyrene or poly-carbonic acid.
10. a LED street lamp, comprises LED module, it is characterized in that, described LED street lamp also comprises the power circuit as described in claim 1 to 8 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320750099.8U CN203590040U (en) | 2013-11-22 | 2013-11-22 | Power supply circuit and LED street lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320750099.8U CN203590040U (en) | 2013-11-22 | 2013-11-22 | Power supply circuit and LED street lamp |
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| Publication Number | Publication Date |
|---|---|
| CN203590040U true CN203590040U (en) | 2014-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320750099.8U Expired - Fee Related CN203590040U (en) | 2013-11-22 | 2013-11-22 | Power supply circuit and LED street lamp |
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| CN (1) | CN203590040U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105183125A (en) * | 2015-10-26 | 2015-12-23 | 刘勇 | Case control circuit and case |
| CN108696143A (en) * | 2018-07-03 | 2018-10-23 | 浙江中创天成科技有限公司 | A kind of method of online real-time optimization wireless charging system inverter frequency and system power |
| CN108767956A (en) * | 2018-07-03 | 2018-11-06 | 浙江中创天成科技有限公司 | A kind of dynamic radio electric energy Transmission system and its passive control method |
-
2013
- 2013-11-22 CN CN201320750099.8U patent/CN203590040U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105183125A (en) * | 2015-10-26 | 2015-12-23 | 刘勇 | Case control circuit and case |
| CN108696143A (en) * | 2018-07-03 | 2018-10-23 | 浙江中创天成科技有限公司 | A kind of method of online real-time optimization wireless charging system inverter frequency and system power |
| CN108767956A (en) * | 2018-07-03 | 2018-11-06 | 浙江中创天成科技有限公司 | A kind of dynamic radio electric energy Transmission system and its passive control method |
| CN108767956B (en) * | 2018-07-03 | 2020-05-29 | 浙江中创天成科技有限公司 | Dynamic wireless power transmission system and passive control method thereof |
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Denomination of utility model: Power supply circuit and LED street lamp Effective date of registration: 20150609 Granted publication date: 20140507 Pledgee: Shenzhen high tech investment and financing Company limited by guarantee Pledgor: Shenzhen Technology Co., Ltd.|Shenzhen Haitian force Technology Co., Ltd. Registration number: 2015990000457 |
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