CN201206743Y - 大功率led灯 - Google Patents

大功率led灯 Download PDF

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Publication number
CN201206743Y
CN201206743Y CNU2008200926166U CN200820092616U CN201206743Y CN 201206743 Y CN201206743 Y CN 201206743Y CN U2008200926166 U CNU2008200926166 U CN U2008200926166U CN 200820092616 U CN200820092616 U CN 200820092616U CN 201206743 Y CN201206743 Y CN 201206743Y
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led
lamp
inner support
circuit
lamp holder
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易胜能
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DONGGUAN ANLI ELECTRONICS Co Ltd
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DONGGUAN ANLI ELECTRONICS Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00Globes; Bowls; Cover glasses
    • F21V3/02Globes; Bowls; Cover glasses characterised by the shape
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20Light sources comprising attachment means
    • F21K9/23Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20Light sources comprising attachment means
    • F21K9/23Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/232Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20Light sources comprising attachment means
    • F21K9/23Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/238Arrangement or mounting of circuit elements integrated in the light source
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F21V23/004Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
    • F21V23/006Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board the substrate being distinct from the light source holder
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00Globes; Bowls; Cover glasses
    • F21V3/04Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/061Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being glass
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

本实用新型公开了一种大功率LED灯,包括玻璃灯罩、LED灯泡、通线孔盖、灯座、PCB板、内支架、E27灯头等部分,LED灯泡焊接在LED铝制板中央,LED铝制板与灯座采用镶入式组装,灯座为倒圆台形,其表面设计为栅形结构;PCB板装在圆筒形的内支架空腔内,通线孔盖和内支架装在灯座空腔内;内支架通过下部的螺纹与E27灯头拧合在一起。本实用新型可以有效克服普通照明灯电能消耗大,效率低的问题,同时解决新型大功率LED所配套的开关电源电路在输出较低电压时转换效率低,电流不稳定的问题。

Description

大功率LED灯
技术领域
本实用新型涉及一种照明装置,尤其涉及一种使用高效开关电源驱动的大功率LED照明装置。
背景技术
普通白炽灯照明时由于发热大,电能转换效率低,造成电能极大损耗,不符合节能要求。这要求人们使用更加高效节能的新型大功率LED照明装置用来照明。
但新型大功率LED驱动电压较低,仅有3.5V左右,所以电流也较大。公知的TNY266系列开关电源厂商推荐电路由于高频变压器转换效率较低,输出部分整流及电流检测元件压降大,大约有1V,在用于5V及以上电压较小电流输出时高频变压器及元件压降影响小,效率可达70%以上;但在用于3.5V低电压并且大电流输出时,效率还不到50%,而且大电流输出时输出部分元件发热严重,造成电能较大消耗,电源寿命很短。而且新型大功率LED对电流稳定精度要求极高,必须在700mA时才能达到最稳定工作状态,光能转换效率也最高。公知的普通开关电源常用电流检测电路使用普通三极管侦测,由于三极管受温度影响大,侦测电阻阻值也必须很大,约在1欧左右,耗电大,所以误差极大,造成电流过大或过小,使LED工作不稳定,光能转化效率低。
实用新型内容
本实用新型的目的是针对上述技术问题的不足,提供一种大功率LED灯,它有效克服普通照明灯电能消耗大,效率低的问题,同时解决新型大功率LED所配套的开关电源电路在输出较低电压转换时效率低,电流不稳定的问题。
本实用新型的技术方案是,一种大功率LED灯,包括玻璃灯罩、LED灯泡、通线孔盖、灯座、PCB板、内支架、E27灯头等部分,其特征是,LED灯泡焊接在LED铝制板中央,LED铝制板与灯座采用镶入式组装,灯座为倒圆台形,其表面设计为栅形结构;PCB板装在圆筒形的内支架空腔内,通线孔盖和内支架装在灯座空腔内;内支架通过下部的螺纹与E27灯头拧合在一起。
铝制板与灯座接触面之间贴合有导热硅酮胶。
E27灯头的电极接开关电源板输入端,输出端依极性焊接于LED灯泡正负引脚焊盘。
所述PCB板上带有开关电源电路,电路中所用变压器为高频变压器。
所述开关电源电路由初级整流滤波电路,开关及PWM控制电路,次级整流滤波电路,恒流电路,反馈电路组成。
所述高频变压器采用EE16磁芯,有三组线圈,共四个绕组;初级线圈分内外两组紧密包住输出绕组;输出绕组采用粗铜线密绕;反馈绕组在最外层,绕组之间绕三层绝缘胶纸隔离,变压器浸绝缘漆绝缘。
本实用新型与以往技术相比的有益效果是:
1.光能输出效率高:本实用新型所使用2W700mA大功率LED灯芯在其朝向的发光强度相当于30W白炽灯的发光强度。
2.开关电源输出效率高。由于本实用新型使用最新设计高效高频变压器,输出整流采用IR公司优质肖特基双二极管12CWQ06FN,并采用ESR电容等技术,所以效率极高。接220V市电,此实用新型的开关电源驱动工作电压为3.5V的大功率LED灯芯时输出功率与输入功率之比,即输出效率达到70%以上。TNY266系列开关电源IC厂商推荐的开关电源电路驱动此LED时效率还不到50%。
3.此实用新型的大功率LED电流稳定在700mA±30mA,电流始终恒定。公知的开关电源使用普通三极管侦测电流的误差范围是700mA±300mA,电流变化很大,不稳定。
4.散热效果良好。开关电源电路和LED工作稳定,因为温度不会过高,所以产品使用寿命较长,实际长时间通电老化测试也验证了这个新产品可长期稳定工作。
附图说明
图1为本实用新型整体结构图。
图2是图1的A—A剖视图。
图3是图1的B—B剖视图。
图4是本实用新型结构分解图。
图5是图4的局部放大图。
图6是本实用新型内支架图。
图7是本实用新型通线孔盖图。
图8是本实用新型开关电源电路结构方框图。
图9是本实用新型高频变压器原理图。
图10是本实用新型高频变压器绕组结构图。
图11是本实用新型开关电源板电路图。
在图中,1.灯罩,2.LED灯泡,3.通线孔盖,4.灯座,5.PCB板,6.内支架,7.E27灯头,8.高频变压器,9.正、负极连接线,10.电源线,11.LED铝制板。
具体实施方式
本实用新型安装于E27灯头,接220VAC市电即可作为照明灯使用,安全高效,使用方便。整体图如附图1所示,主要由玻璃灯罩1、灯座4、E27灯头7等结构组成,玻璃灯罩1为雾状白色,光线柔和。为了使LED灯泡具有良好的散热效果,避免其由于温度过高而烧坏,本实用新型结构设计采用以下三个方案:a.灯座4采用具有良好散热作用的铝合金压铸,整体式压铸成型,其导热性能更加优越,不会出现局部温度高等现象;b.灯座杯体设计为栅形散热结构,便于空气流通,同时也增加了铝杯的散热面积,散热效果更加良好;c.大功率LED焊接于圆型铝制板,有印刷线路,绝缘良好,圆型铝制板与铝杯采用镶入式组装,使其接触面积增大,并且接触面之间用导热硅酮胶紧密贴合,加强其散热效果。
如图2、图4、图5、图6及图7所示,LED灯泡2焊接在LED铝制板11中央,LED灯泡使用3.5V700mA大功率LED灯芯,节能高效;LED铝制板为圆型白色,有印刷线路,绝缘良好。LED铝制板11与灯座4采用镶入式组装,铝制板用导热硅酮胶粘接于灯座,有高效散热功能的灯座能将LED的热量迅速传导出去,使LED温度恒定在合理的范围内。PCB板5装在圆筒形的内支架6的空腔内,通线孔盖3和内支架6装在灯座4空腔内;内支架6通过下部的螺纹与E27灯头7拧合在一起。
PCB板5上带有开关电源电路,开关电源输入端接E27灯口的电极,输出端依极性焊接于LED正负引脚焊盘,如图3所示。开关电源板对初次级有严格绝缘,耐压达5000V以上。如附图8所示本实用新型开关电源电路结构方框图,图11本实用新型开关电源板电路图。电路由初级整流滤波电路,开关及PWM控制电路,次级整流滤波电路,恒流电路,反馈电路组成。初级开关电源IC采用TNY266,内设PWM电路,外围电路结构简单。开关电源输出整流二极管D1采用双肖特基二极管12CWQ06FN,内阻极低,压降仅0.1V,耗能极少,发热很小;而普通肖特基二极管如SR240,FR260等均在0.5V以上,耗能大,发热严重。使用此二极管对提升开关电源效率影响极大。测试表明有减低约10%的损耗。输出滤波电容C3采用470uF 10V ESR高频低内阻电解电容,能对整流后的高频脉冲电压有效滤波,高频内阻极小,小于80毫欧,所以滤波电容发热小,寿命长,提高了输出效率。普通电解电容内阻大于0.3欧,发热严重,内部电解液会烤干,寿命短,且效率低。开关电源使用双431精密电流侦测和恒流电路。U4提供2.5V精密基准电压,并由R9和R10分压产生2.33V电压供给U3。当经过小阻值精密电阻R7的电流未达到700mA时,U3不工作。当经过小阻值精密电阻R7的电流达到700mA时,R7和R10的电压和就达到2.5V,这时U3开始工作,UC1光耦也开始工作,从而达到精密控制电流稳定在700mA的作用。反馈电路由UC1 PC817构成,在输出过压过流时均能灵敏保护,使电路稳定工作。
开关电源电路中所用变压器为高频变压器8,如附图9和附图10所示为高频变压器原理图和变压器绕组结构图。高频变压器采用EE16磁芯,体积较小。有三组线圈,共四个绕组;初级线圈分内4脚→抽头密绕60圈2层外抽头→1脚密绕30圈1层两组紧密包住输出绕组,漏感极小;输出绕组6脚→5脚采用0.6mm粗铜线密绕12圈1层,内阻极小;反馈绕组3脚→2脚在最外层疏绕12圈,1层,用于向开关电源IC提供电源,使IC工作于最高转换效率。绕组之间绕三层绝缘胶纸隔离,变压器浸绝缘漆绝缘。所以此实用新型的高频变压器比公知的常用高频变压器效率高10%以上。
本实用新型使用低压大电流LED,并使用高效率开关电源驱动,同时先进的散热结构保证产品能长期稳定工作,整机结构简单合理,方便测试和使用。

Claims (6)

1、一种大功率LED灯,包括玻璃灯罩、LED灯泡、通线孔盖、灯座、PCB板、内支架、E27灯头等部分,其特征在于:LED灯泡(2)焊接在LED铝制板(11)中央,LED铝制板(11)与灯座(4)采用镶入式组装,灯座(4)为倒圆台形,其表面设计为栅形结构;PCB板(5)装在圆筒形的内支架(6)空腔内,通线孔盖(3)和内支架(6)装在灯座(4)空腔内;内支架(6)通过下部的螺纹与E27灯头(7)拧合在一起。
2、根据权利要求1所述的一种大功率LED灯,其特征在于:铝制板(11)与灯座(4)接触面之间贴合有导热硅酮胶。
3、根据权利要求1所述的一种大功率LED灯,其特征在于:E27灯头(7)的电极接开关电源板输入端,输出端依极性焊接于LED灯泡(2)正负引脚焊盘。
4、根据权利要求1所述的一种大功率LED灯,其特征在于:所述PCB板(5)上带有开关电源电路,电路中所用变压器为高频变压器(8)。
5、根据权利要求4所述的一种大功率LED灯,其特征在于:所述开关电源电路由初级整流滤波电路,开关及PWM控制电路,次级整流滤波电路,恒流电路,反馈电路组成。
6、根据权利要求4所述的一种大功率LED灯,其特征在于:所述高频变压器采用EE16磁芯,有三组线圈,共四个绕组;初级线圈分内外两组紧密包住输出绕组;输出绕组采用粗铜线密绕;反馈绕组在最外层,绕组之间绕三层绝缘胶纸隔离,变压器浸绝缘漆绝缘。
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102221144A (zh) * 2010-04-19 2011-10-19 日立空调·家用电器株式会社 Led灯泡
WO2012167731A1 (zh) * 2011-06-10 2012-12-13 漳州灿坤实业有限公司 一种led灯
US9212801B2 (en) 2011-11-23 2015-12-15 Huizhou Light Engine Ltd. Electrical connections for a light-emitting diode lamp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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