CN205283421U

CN205283421U - LED lighting driver electrical power generating system to high voltage system

Info

Publication number: CN205283421U
Application number: CN201520939499.2U
Authority: CN
Inventors: 叶阳
Original assignee: Shanghai Hongyu Electric Technology Co Ltd
Current assignee: Shandong Zhongda Power Technology Co., Ltd.
Priority date: 2015-11-23
Filing date: 2015-11-23
Publication date: 2016-06-01
Anticipated expiration: 2025-11-23

Abstract

The utility model discloses a LED lighting driver electrical power generating system to high voltage system, including the three -phase AC system, the multiple -pulse vertoro, non - isolation DCDC transfer circuit, the three -phase AC system, non - isolation DCDC transfer circuit is connected with the input and the output of multiple -pulse vertoro respectively, the multiple -pulse vertoro is including exchanging side three -phase filter inductor, many impulse transformer, a plurality of three phase bridge corresponding with many impulse transformer's number of pulse, direct current side filter inductor, direct current electric capacity, it is connected with many impulse transformer's input to exchange side three -phase filter inductor, three phase bridge's AC input is connected with many impulse transformer's output, three phase bridge's DC output directly connects in parallel and connects direct current side filter inductor, direct current electric capacity. The utility model discloses a multiple -pulse vary voltage rectification technology, the reliability is high, and is efficient, and power factor is high, and harmonic content is low, and is with low costs.

Description

For the LED illumination driving power source system of high-voltage alternating system

Technical field

The utility model relates to a kind of power-supply system, particularly relates to a kind of LED illumination driving power source system for high-voltage alternating system.

Background technology

LED drive power under general application conditions has been matured product, has many types and model available. But in some particular application, general solution not necessarily can be dealt with problems. In the power system of the U.S., such as there is multiple voltage system, wherein have one more in industrial occasions application be 480V three-phase alternating current system, its phase voltage is 277V, and line voltage is 480V. Such system is generally three-phase three-wire system, therefore cannot use neutral point. When adopting LED illumination in this system, it is necessary to LED is directly received in the AC line of 480V. Conventional LED drive power, even wide input power type, its input voltage is the highest also only has 305V, cannot meet this kind of special requirement.

Use in 480V system at present LED generally adopt below two solutions:

Scheme one: voltage drop method. As shown in Figure 1,480V system first accesses a step-down transformer, voltage is reduced to 220V or 11V, so just can directly adopt common LED to drive power supply in rear class. This is the scheme that a kind of ratio is easier to expect, its shortcoming is also that comparison is obvious: the transformer added adds cost and loss.

Scheme two: high drive method. Namely buying can bear the driving power supply of 480V, as shown in Figure 2. So just can without the need to increasing additional components, directly light fixture connecting system. Its shortcoming is: 480V drives the manufacturer of power supply little, and range of choice is limited; The driving power volume weight of high input voltage is all greater than common driving power supply, and the index such as efficiency and power factor is generally all not so good as common driving power supply; The price of high drive power supply is obviously higher than the common driving power supply of same power.

Practical novel content

Technical problem to be solved in the utility model is to provide a kind of LED illumination driving power source system for high-voltage alternating system, and it adopts multipulse transformation commutation technique, reliability height, efficiency height, power factor height, and harmonic wave content is low, and cost is low.

The utility model is solved the problems of the technologies described above by following technical proposals: a kind of LED illumination driving power source system for high-voltage alternating system, comprise three-phase alternating current system, LED lamp, multipulse vertoro and non-isolation DC/DC and convert circuit, wherein:

Described three-phase alternating current system, non-isolation DC/DC convert circuit respectively input terminus and output terminal with described multipulse vertoro be connected, described multipulse vertoro comprises AC side three-phase filter inductance, multipulse transformer, some the three-phase commutation bridges corresponding with the umber of pulse of multipulse transformer, DC side filter inductance, and DC capacitor, described AC side three-phase filter inductance is connected with the input terminus of described multipulse transformer, the ac input end of described three-phase commutation bridge is connected with the output terminal of described multipulse transformer, the DC output end of described three-phase commutation bridge is directly in parallel and connects described DC side filter inductance and DC capacitor, described non-isolation DC/DC converts circuit and is also connected with described LED lamp.

Preferably, described non-isolation DC/DC converts circuit is a Buck circuit.

Positive progressive effect of the present utility model is:

1, the conversion of AC/DC of the present utility model adopts multipulse transformation commutation technique, and reliability height, efficiency height, power factor height, harmonic wave content is low, and cost is low.

2, the conversion of AC/DC of the present utility model adopts isolation scheme, it is possible to freely sets volts DS, when AC side voltage is very high, still volts DS can be set in a zone of reasonableness (such as 250V).

3, the DC/DC conversion of DC side can adopt non-isolated Buck circuit, reliability height, and efficiency height, cost is low.

4, the utility model reduces costs, and can automatically accomplish three-phase load balance.

5, the utility model is not only applicable to the 480V three-phase alternating current system of the U.S., is suitable for the 380V three-phase alternating current system of China simultaneously yet, and other three-phase alternating current systems all.

Accompanying drawing explanation

Fig. 1 is the schematic circuit of existing voltage drop method.

Fig. 2 is the schematic circuit of existing high drive method.

Fig. 3 is the functional block diagram of the utility model for the LED illumination driving power source system of high-voltage alternating system.

Fig. 4 is the physical circuit figure of the utility model for the LED illumination driving power source system of high-voltage alternating system.

Fig. 5 is the structural representation of winding in the utility model.

Fig. 6 is the structural representation that non-isolation DC in the utility model/DC converts circuit.

Embodiment

A better embodiment of the present utility model is provided, so that the technical solution of the utility model to be described in detail below in conjunction with accompanying drawing.

As shown in Figure 3, the utility model comprises three-phase alternating current system (such as 480V), LED lamp, multipulse vertoro and non-isolation DC/DC for the LED illumination driving power source system of high-voltage alternating system and converts circuit, wherein, described three-phase alternating current system, non-isolation DC/DC convert circuit respectively input terminus and output terminal with described multipulse vertoro be connected, the voltage of described three-phase alternating current system is first converted to a high voltage direct current system by a multipulse vertoro, such as volts DS can be set as 250V; Described non-isolation DC/DC convert circuit with LED lamp is connected, specifically, all LED lamp are connected on direct current bus (such as 250V direct current bus) by non-isolation DC/DC conversion circuit. Owing to the direct current of 250V exchanges isolation of system with 480V, therefore the non-isolation DC in LED lamp/DC converts circuit can be a Buck circuit.

As shown in Figure 4, described multipulse vertoro comprises AC side three-phase filter inductance Ldm, 18-pulse transformer T1, first three-phase commutation bridge B1, 2nd three-phase commutation bridge B2, 3rd three-phase commutation bridge B3, DC side filter inductance Ldc, and DC capacitor Cdc, described AC side three-phase filter inductance Ldm is connected with the input terminus of described 18-pulse transformer T1, the ac input end of described first three-phase commutation bridge B1, the ac input end of the 2nd three-phase commutation bridge B2, the ac input end of the 3rd three-phase commutation bridge B3 all output terminal with described 18-pulse transformer T1 be connected, the DC output end of described first three-phase commutation bridge B1, the DC output end of the 2nd three-phase commutation bridge B2, the DC output end of the 3rd three-phase commutation bridge B3 is directly in parallel and connects described DC side filter inductance Ldc and DC capacitor Cdc.

The value of each element is as follows: every phase inductance amount of AC side three-phase filter inductance Ldm is 2.6mH, the inductance amount of DC side filter inductance Ldc is 5mH, the total capacitance of DC capacitor Cdc is 550uF, and DC capacitor Cdc is formed in parallel by the thin-film capacitor of five 110uF.

In this example, multipulse transformer T1 is a 18-pulse transformer. In practical application, multipulse transformer T1 can be multiple the umber of pulse of six pulse transformers, twelve-pulse transformer, 18-pulse transformer, 24 pulse transformers etc. six, can adjusting as required, the rectification bridge number corresponding with pulse transformer is one, two, three, four. Being described for 18-pulse transformer below, the design variable of this 18-pulse transformer is as follows:

(1) magnetic core: silicon steel material, E-type magnetic core.

(2) air gap: pad 0.1mm.

(3) winding: three cover windings are respectively around, on three posts, for wherein a set of, its structure is as shown in Figure 5. Winding is divided into six layers, and every layer of end of the same name is consistent, and the inside is the first layer. From the inside to surface, 1,2,3,4,5,6 windings it are respectively. Wherein winding 1 is former limit winding, 557 circles; Winding 2��5 is vice-side winding. Winding 2 is secondary first winding, 205 circles; Winding 3,4 is second and third winding of secondary, each 152 circles; Winding 5,6 is secondary fourth, fifth winding, each 81 circles. Footpath, former sideline is AWG18, and all secondary wire diameters are AWG16.

(4) outlet: all outlet length 20cm.

(5) temperature grade: 155 degree.

(6) insulate: between the first layer and magnetic core: 3750Vdc; Between the first layer and the second layer: 3750Vdc; Between all the other each layers: 2000Vdc; Between 6th layer and magnetic core: 3750Vdc.

In this example, the non-isolation DC on light fixture/DC converts circuit and adopts Buck circuit, thus realizes high-level efficiency, high reliability, and low cost. Buck circuit is as shown in Figure 6. Its input Vin is 250V volts DS, an input terminus input capacitance Cin in parallel. MOS pipe MOS1 and diode D1 connects, and the negative electrode of diode D1 is connected on input capacitance and just holds, and the source electrode of MOS pipe MOS1 is connected on input capacitance negative terminal, and the anode of diode D1 is connected with the drain electrode of MOS pipe MOS1. The anode of diode D1 connects an inductance L 1, the negative terminal of another termination output capacitance of inductance. Output capacitance just holds the negative electrode connecting diode D1. The function of this Buck circuit is exactly the control by the grid to MOS pipe MOS1, and the 250V volts DS of input is converted to direct current constant current output, and current value is Iout.

When adopting the AC/DC scheme of isolation, the voltage of DC side freely can be set by transformer voltage ratio, when being set in below 300V, selects protection element and design back circuit than being easier to. When adopting isolation scheme, the efficiency of AC/DC conversion part will reduce two to three percentage points than non-isolated scheme; And rear end DC/DC conversion part will obtain very big simplification, the DC/DC of non-isolated adopts Buck circuit, and efficiency can up to 97��98%, and the DC/DC isolated is when the LLC circuit that employing is most effective, and most effective also can only be 95��96%. Comprehensive front and back stages, adopts isolation or the AC/DC scheme of non-isolated, and efficiency aspect does not have difference substantially, and when adopting the AC/DC of isolation, owing to DC voltage is lower, realizes the engineering particular problems such as route protection than being easier to.

Above-described specific embodiment; the technical problem of solution of the present utility model, technical scheme and useful effect have been further described; it is it should be understood that; the foregoing is only specific embodiment of the utility model; it is not limited to the utility model; all within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims

1. the LED illumination driving power source system for high-voltage alternating system, it is characterised in that, it comprises three-phase alternating current system, LED lamp, multipulse vertoro and non-isolation DC/DC and converts circuit, wherein:

2. as claimed in claim 1 for the LED illumination driving power source system of high-voltage alternating system, it is characterised in that, it is a Buck circuit that described non-isolation DC/DC converts circuit.