CN202353882U

CN202353882U - High-voltage power supply of LED (light-emitting diode) lamp

Info

Publication number: CN202353882U
Application number: CN2011204932276U
Authority: CN
Inventors: 袁舜虞
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-01
Filing date: 2011-12-01
Publication date: 2012-07-25
Anticipated expiration: 2021-12-01

Abstract

The utility model discloses a high-voltage power supply of an LED (light-emitting diode) lamp. The high-voltage power supply comprises a capacitor, a full-wave rectifier and a pi-shaped filter connected to the full-wave rectifier, wherein the capacitor has two end points which are respectively connected with one input end of the full-wave rectifier and one end of the high-voltage AC power supply; the full-wave rectifier is provided with two input ends and two output ends, wherein the two input ends are respectively connected to one end of the capacitor and one end of the high-voltage AC power supply; since the capacitor is connected on a circuit in series, and can limit current of the input end of the full-wave rectifier; and the the high-voltage AC power supply is converted into high-voltage direct-current power supply by matching with the full-wave rectifier, and the high-voltage direct-current power supply is output to the pi-shaped filter; the two output ends of the pi-shaped filter are connected with the LED lamp, the high-voltage direct-current power supply is converted into a low-frequency direct-current power supply without generating heat energy by the pi-shaped filter, so that the light emitting efficiency of the LED is improved, and the service life of the LED lamp is prolonged.

Description

The high voltage source supply of LED light fixture

Technical field

The utility model is a kind of power supply unit, refers to a kind of high voltage source supply that is applicable to various voltage LED light fixtures especially.

Background technology

An existing LED light fixture includes plural light-emitting diode; Each light-emitting diode must connect a direct current power supply could be luminous; Therefore when the LED light fixture is connected to an AC power with convenient use, this AC power need be passed through and converted DC power supply into and just can be used in light-emitting diode; Announce " the not electro-heat equipment of bulb structure " novel patent case No. 392924 like Taiwan, refer to a kind of LED of being used in unit connection line especially, it is organized by members such as shell block, insulation board, LED unit, protective resistance, bridge rectifier, electric capacity and bleeder resistances and constitutes; Wherein, this shell block bottom is provided with conductive junction point, and the shell block top is provided with insulation board and LED unit; The LED unit is connected in series on insulation board and forms two-route; In between two-route, be connected with protective resistance and bridge rectifier, wherein a route is connected in shell block, behind the electric capacity and bleeder resistance of another route serial connection one parallel connection; Be connected on the conductive junction point again; To form the structure of bulb, by bridge rectifier and protective resistance adjustment electric current, therefore not needing to connect transformer can use again; And the LED unit can not generated heat in use, and effectively reduce manufacturing cost.

Know by aforementioned; Because this bulb structure is to convert power source conversion to low-voltage dc power supply (6～36V) by high-voltage ac power (110V, 220V); But still have the problem of low-voltage, high electric current, high frequency (30kHz-100kHz) and high temperature (40～50 ℃), in addition since the common non-refractory of electronic building brick in the circuit therefore be heated and be easy to generate light decay and reduction of service life; So be only applicable to have the LED light fixture of a small amount of light-emitting diode, and the low problem with weak effect of brightness is arranged.

The utility model content

Of preceding taking off; Its power source conversion system of existing LED lamp converts high-voltage ac power to low-voltage dc power supply, but still has low-voltage, high electric current, high frequency and high temperature, and it is short useful life to be easy to generate light decay; So be only applicable to have the LED light fixture of a small amount of light-emitting diode; And the low problem with weak effect of brightness is arranged, so the utility model main purpose provide one can directly high-voltage ac power be converted into high-voltage DC power supply power supply unit, mainly be through an electric capacity, a full-wave rectifier and a pi type filter being set to export a high voltage, low current, low frequency (50Hz-60Hz), can not produce the high-voltage DC power supply of heat energy; So can not produce light decay; Applicable to the LED light fixture of volume light-emitting diode, and have brightness height, the good effect of effect, the utility model power supply unit is not owing to itself can produce heat energy in addition; Can produce temperature so the electronic building brick in LED light fixture and the circuit is neither, so can improve LED light fixture useful life.

Make the high voltage source supply of aforementioned LED light fixture include the pi type filter that an electric capacity, a full-wave rectifier and are connected with full-wave rectifier for reaching major technique means system that aforementioned purpose takes; Wherein:

This electric capacity has two end points, and this two end points is to be connected to a wherein input of full-wave rectifier and a wherein end of high-voltage ac power;

This full-wave rectifier has two inputs and two outputs, and this two input is to be connected to an end of electric capacity and a wherein end of high-voltage ac power respectively;

This pi type filter has two inputs and two outputs; This two input is two outputs that are connected to full-wave rectifier; This pi type filter includes a resistance-type fuse and two electric capacity, and this resistance-type fuse is to be connected to wherein an input and wherein an output, and wherein two ends of an electric capacity are to be connected to two inputs respectively; Two ends of another electric capacity are to be connected to two outputs respectively, and another input and another output are to interconnect again;

Utilize the high voltage source supply of the LED light fixture of aforementioned components composition; With high-voltage ac power by the step-down of electric capacity and full-wave rectifier, current limliting, filtering after, convert the high-voltage direct-current electricity that is fit to uses of LED light-emitting diode to, and by pi type filter formation low frequency, can not produce the characteristic of heat energy; So can not produce light decay; Applicable to the LED light fixture of volume light-emitting diode, and have brightness height, the good effect of effect, the utility model power supply unit itself can not produce heat energy in addition; Can produce temperature so the electronic building brick in LED light fixture and the circuit is neither, so can improve LED light fixture useful life.

Description of drawings

Fig. 1: the circuit diagram that is the preferred embodiment of one of the utility model.

Fig. 2: the LED lamp circuit figure that is the preferred embodiment of one of the utility model.

Fig. 3: the LED lamp circuit figure (parallel connection of LED unit) that is the preferred embodiment of one of the utility model.

The primary clustering symbol description

10 electric capacity

20 full-wave rectifiers, 21～24 diodes

30 pi type filters, 31 resistance-type fuses

32 first electric capacity, 33 second electric capacity

The 40LED light fixture

Embodiment

About a preferred embodiment of the utility model, see also shown in Figure 1ly, include the LED light fixture 40 that pi type filter 30 and that an electric capacity 10, a full-wave rectifier 20, is connected with full-wave rectifier 20 is connected to pi type filter 30.

This electric capacity 10 has two end points, and wherein an end points is a wherein input that is connected in full-wave rectifier 20, and another end points is a wherein end that is connected to high-voltage ac power; Because this electric capacity 10 is to be serially connected with between high-voltage ac power and the full-wave rectifier 20, when the voltage of high-voltage ac power produced change, its electric capacity 10 still can be kept the electric current of the stable of high-voltage ac power voltage and restriction high-voltage ac power.

This full-wave rectifier 20 has two inputs and two outputs; This two input is to be connected to an end of electric capacity and a wherein end of high-voltage ac power respectively, and this two output is an anodal and negative pole, in present embodiment; This full-wave rectifier 20 is made up of two pairs of diodes; Each diode has an anode and a negative electrode respectively, is connected to the cathode output end of full-wave rectifier 20 after wherein the negative electrode of pair of diodes 21,22 interconnects again, is connected to the cathode output end of full-wave rectifier 20 after another anode to diode 23,24 interconnects; The anode of aforementioned again paired diode 21,22 interconnects with another negative electrode to diode 23,24 respectively; The diode 21,23,22,24 that each positive and negative utmost point joins is connected to two inputs of full-wave rectifier 20 respectively, can convert high-voltage ac power to low-voltage dc power supply.

This pi type filter 30 has two inputs and two outputs; This two input is positive pole and the cathode output end that is connected respectively to full-wave rectifier 20; This pi type filter 30 includes a resistance-type fuse 31, one first electric capacity 32 and one second electric capacity 33; This resistance-type fuse 31 is to be serially connected with wherein an input and wherein between the output; Two ends of first electric capacity 32 are two inputs that are connected to pi type filter 30 respectively, and two ends of second electric capacity 33 are two outputs that are connected to pi type filter 30 respectively, and another input and another output are to interconnect again; This pi type filter 30 can be output as high pressure low frequency DC power supply with high-voltage DC power supply; And can not produce heat energy; Be serially connected with the resistance-type fuse on the circuit again in this pi type filter; When the voltage of high-voltage DC power supply surpasses its rated value, can damage the resistance-type fuse and the formation short circuit of cutting off the electricity supply, be connected in the LED light fixture of pi type filter 30 outputs with protection.

This LED light fixture 40 has two power ends; This two power end is two outputs that are connected to pi type filter 30 respectively; Please cooperate consult Fig. 2, shown in 3, this LED light fixture 40 is by an above LED unit 41 string and/or is formed in parallel that this LED unit 41 is to be formed by plural light-emitting diode serial connection; This LED light fixture 40 can use single LED unit 41 or by 41 parallel connections of a plurality of LED unit to increase the brightness of LED light fixture 40; For example when the voltage of power end be the conducting voltage of 110V and this light-emitting diode when being 3V, by 36 LED unit 41 that light-emitting diode forms of serial connection, can be connected directly to two outputs of pi type filter 30; Or a plurality of LED unit 41 with 36 light-emitting diodes of parallel connection, to increase the brightness of LED light fixture 40.

With the input of end of electric capacity 10 and full-wave rectifier 20 wherein an end be connected to high-voltage alternating string ripple power supply; This high-voltage alternating string ripple power source voltage can be 110V, 220V or 380V; Supply frequency can be 50Hz or 60Hz, and this electric capacity 10 all can be kept the electric current of the stable of high-voltage ac power voltage and restriction high-voltage ac power, and the voltage that converts high-voltage dc voltage when high-voltage ac power to produces change; When for example high-voltage dc voltage is 110V; When if the conducting voltage of single light-emitting diode is 3V, by 36 LED unit 41 that light-emitting diode forms of serial connection, the utility model also is applicable to that high-voltage dc voltage is that 110V increases or reduces 20% and becomes 132V to 88V; Let the usage quantity of light-emitting diode also applicable to 44 to 29; Same 220V or 380V can also this analogize can cooperate a plurality of LED of connection in series-parallel unit 41 in addition, can increase the various selection of user.

When the utility model is short-circuited when the power end of High AC voltage; But electric capacity 10 auto bypass lead back power supply to avoid damaging the LED light fixture; Also can be large and small by the capacitance that changes electric capacity 10; Decide circuit to be suitable for the high-voltage dc voltage of which kind of size; And this electric capacity 10 has high temperature resistant and low temperature resistant characteristic, so that the circuit of the utility model is applicable to the LED light-emitting diodes of various different most amounts and the LED light fixture (for example LED bulb, LED fluorescent lamp, LED street lamp, LED signboard lamp etc.) of different types.

Know by aforementioned, can convert high-voltage ac power to low-voltage dc power supply, again the high pressure low frequency direct voltage of these pi type filter 30 outputs through this electric capacity 10 and full-wave rectifier 20 are set; Low frequency is provided, can produce the characteristic of heat energy; So can not produce light decay,, also can provide the LED light fixture of full series connection or connection in series-parallel light-emitting diode to use applicable to the LED light fixture of volume light-emitting diode; And have brightness height, the good effect of effect; In addition the utility model power supply unit itself can not produce heat energy, can the generation temperature so the electronic building brick in LED light fixture and the circuit is neither, so can improve LED light fixture useful life.

The above only is the preferred embodiments of the utility model; Not being that the utility model is done any pro forma restriction, though the utility model with the preferred embodiments exposure as above, yet is not in order to limit the utility model; Anyly be familiar with the professional and technical personnel; In not breaking away from this scope of making technical scheme, make a little change or be modified to the equivalent embodiment of equivalent variations when the technology contents of above-mentioned announcement capable of using, be the content that does not break away from the utility model technical scheme in every case;, all still belong in this scope of making technical scheme any simple modification, equivalent variations and modification that above embodiment did according to the technical spirit of the utility model.

Claims

1. the high voltage source supply of a LED light fixture is characterized in that, includes the pi type filter that an electric capacity, a full-wave rectifier and are connected with full-wave rectifier; Wherein:

This full-wave rectifier has two inputs and two outputs, and this two input is to be connected to an end of electric capacity and a wherein end of high-voltage ac power;

This pi type filter has two inputs and two outputs; This two input is two outputs that are connected to full-wave rectifier; This pi type filter includes a resistance-type fuse and first, second electric capacity; This resistance-type fuse is to be connected to wherein an input and wherein between the output; Two ends of first electric capacity are two inputs that are connected to pi type filter respectively, and two ends of second electric capacity are two outputs that are connected to pi type filter respectively, and another input of pi type filter and another output are to interconnect again.

2. the high voltage source supply of LED light fixture as claimed in claim 1; It is characterized in that; This full-wave rectifier is made up of two pairs of diodes; Each diode has an anode and a negative electrode respectively, is connected to the cathode output end of full-wave rectifier after wherein the negative electrode of pair of diodes interconnects, and is connected to the cathode output end of full-wave rectifier after another anode to diode interconnects; The anode of aforementioned paired diode interconnects with another negative electrode to diode respectively again, and the diode that each positive and negative utmost point joins is connected to two inputs respectively.

3. according to claim 1 or claim 2 the high voltage source supply of LED light fixture; It is characterized in that; Two outputs of this pi type filter are connected with a LED light fixture, and this LED light fixture includes an above LED unit, and this LED unit pack contains the light-emitting diode of plural number series connection.

4. the high voltage source supply of LED light fixture as claimed in claim 3 is characterized in that, this LED unit is string and/or two power ends that are parallel to the LED light fixture.