CN201904939U - Direct-current power supply system for indoor LED lamps - Google Patents

Abstract

The utility model relates to a DC power supply system for indoor LED lamps, which belongs to the category of LED lighting lamps; its main feature is that a single AC-DC power conversion module drives multiple indoor LED lamps, and its structure includes an AC-DC power conversion module; at least one indoor LED lamps; and at least one LED lamp driver module; the advantages are: by reducing electronic components, the cost is effectively reduced; no need to use a built-in power supply, which not only reduces the influence of power heating on the LED lamps, but also greatly improves the safety of the LED lamps; Multiple LED lamps can be powered on and off at the same time through the switch, and the LED lamps can also be individually adjusted for brightness through the LED lamp driver module; modular assembly makes it very convenient to replace each module.

Description

A DC power supply system for indoor LED lamps

technical field

The utility model relates to a DC power supply system for indoor LED lamps, in particular to an indoor LED lighting lamp, especially suitable for LED fluorescent lamps, LED downlights, and LED spotlights. Due to the introduction of the DC power supply system, the indoor LED lighting lamps No need to use the built-in power supply, which not only reduces the influence of power supply heat on LED lamps, but also greatly improves the safety of LED lamps; it is not only convenient for the replacement of spare parts, but also convenient for centralized control and management of indoor LED lamps.

Background technique

Light Emitting Diode (LED, Light Emitting Diode) is a PN-type semiconductor diode that uses current to emit light. When a forward voltage is applied, electrons flow into the P-type semiconductor, holes enter the N-type semiconductor, and the electrons and holes recombine to emit light. The light-emitting tube made by using this principle is a light-emitting diode, and indoor LED lighting fixtures are composed of many light-emitting diodes.

The main function of the LED lighting power supply is to convert the AC voltage into a constant current output. There are mainly two types: isolated type and non-isolated type. The isolated type power supply uses an isolation transformer to isolate the AC input from the LED driver and protect the LED from the impact of the external power supply. And to avoid the risk of electric shock, but due to its large size and low efficiency, most power supplies are now non-isolated and built-in, that is, the power supply is assembled inside the LED lamp housing together with the LED and the aluminum substrate, so that the power supply Heat generation adds an additional burden to the heat dissipation structure of LED lamps. In order to dissipate heat, the housing of LED lamps is usually made of aluminum. If the power supply is not well packaged, it will easily cause leakage. In addition, this independent driving method is usually not easy to control centrally.

Utility model content

In view of the shortcomings of the above-mentioned commonly used LED lighting fixtures, the purpose of this utility model is to provide a DC power supply system for indoor LED lighting fixtures. The DC power supply system can be used to form a distributed LED lighting system, and all LED lighting fixtures in the system can be powered centrally. Its structure includes an AC and DC power conversion module; at least one indoor LED lamp; and at least one LED lamp driver module.

The utility model has the advantages that: by reducing the electronic components, the cost is effectively reduced; no need to use a built-in power supply, which not only reduces the influence of power supply heating on the LED lamp, but also greatly improves the safety of the LED lamp; The lamps are powered on and off at the same time, and the LED lamps can also be managed through the LED lamp driver module to adjust the brightness of the LED lamps independently; the modular assembly makes it very convenient to replace each module.

Description of drawings

Figure 1 is a schematic diagram of a commonly used LED lighting fixture power drive;

Fig. 2 is the schematic diagram of the DC power supply system of the present utility model;

Among them: 11 LED drive power supply; 12 more LEDs; 13 circuit substrate; 14 cooling bottom case; 21 AC and DC power conversion module;

Detailed ways

In order to facilitate the understanding of the purpose, function and effect of the present utility model, the embodiment is described as follows in conjunction with the accompanying drawings: The circuit substrate 13 and the heat dissipation bottom case 14, the LED drive power supply 11 converts the AC 220V into a constant current output, usually built-in, and is connected with the circuit on the circuit substrate 13, and a plurality of LEDs 12 are welded on the circuit substrate 13, and the heat dissipation bottom case 14 Generally made of aluminum alloy, the heat of the circuit substrate 13 is conducted to the outside. Since the built-in power supply also generates heat, and the outer shell is sealed, there is a lot of heat that cannot be dissipated, resulting in an increase in the junction temperature of the LED, which greatly affects the performance and life of the LED. In addition, capacitor filtering must be used for AC-DC conversion. Even the life of electrolytic capacitors is less than 5000 hours. The entire LED lighting fixture is disassembled. Moreover, each lamp needs to be converted from AC to DC, which wastes a lot of components, and the structure of AC 220V, driver and LED packaged together also has a lot of leakage and electric shock. Security risks.

As shown in Figure 2, the DC power supply system of the present invention is shown. The system includes an AC-DC power conversion module 21, a plurality of LED lamp driving modules 22 and a plurality of indoor LED lamps 23, wherein the AC-DC power conversion module 21 is isolated from Transformer, EMC filtering (filtering interference signal and noise), full bridge rectification, passive power factor compensation and step-down voltage stabilization and other circuits, the input and output terminals have plug connectors, the input mains AC is 220V, and the output DC voltage is 20-30V , to supply power to the LED lamp driving module 22; the LED lamp driving module 22 is composed of a drive chip, pulse width modulation, current sampling, constant current output and other circuits, and the input and output terminals have plug connectors. Current requirements, the size of the output current can be adjusted by adjusting the parameters of the internal components, and a brightness dimming circuit can also be added as needed; the indoor LED lamp 23 can be an LED fluorescent lamp, LED downlight, LED spotlight, LED ceiling lamp, etc.; It can be seen from the above description that one AC-DC power conversion module 21 supplies power to multiple LED lamp driving modules 22, which saves many components than the original single power supply driving a single lamp; and the isolation transformer separates the external circuit from the LED driving circuit. , effectively avoiding the damage to the LED caused by voltage fluctuations such as mains peak voltage and surge voltage. At the same time, low-voltage and modules with plug connectors can also effectively prevent the danger of electric shock and leakage; if the AC-DC power conversion module 21 or Individual damages to the LED lamp driving module 22 can be disassembled directly for replacement and maintenance without causing damage to the entire lamp; there is no power supply inside the indoor LED lamp 23, which not only reduces heat generation, but also increases the internal space. It is also convenient for the shape design of the lamp; considering the loss of the transmission wire, a wire with low impedance is used, and the number of indoor LED lamps 23 that can be driven by the AC-DC power conversion module 21 and the driving transmission distance are determined on the basis of considering the loss.

Claims (5)

1. the DC power-supply system of an indoor LED light fixture is characterized in that: comprise

One power of alterating and direct current modular converter;

At least one indoor LED light fixture;

And at least one LED light fixture driver module;

2. the DC power-supply system of a kind of indoor LED light fixture according to claim 1 is characterized in that: the power of alterating and direct current modular converter that is adopted can be given a plurality of LED light fixture driver module power supplies.

3. the DC power-supply system of a kind of indoor LED light fixture according to claim 1 is characterized in that: the LED light fixture driver module that is adopted is the driving LED lamp luminescence directly.

4. the DC power-supply system of a kind of indoor LED light fixture according to claim 1 is characterized in that: the LED light fixture that is adopted need not built-in power, is connected by lead with LED light fixture driver module.

5. the DC power-supply system of a kind of indoor LED light fixture according to claim 1 is characterized in that: power of alterating and direct current modular converter that is adopted and LED light fixture driver module all are the modularization assemblings.

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