CN202172507U - High power LED single driving power supply system - Google Patents

Abstract

The utility model relates to a high-power LED single driving power supply system, which includes an external circuit, a driving power supply and several high-power LED lamps. The driving power supply is connected in series in the external circuit, and the current in the external circuit Perform filtering, rectification, and step-down processing. The driving power is connected to the external circuit and the external circuit is isolated into a mains circuit and a light source circuit. The mains circuit is connected to the external mains, and several high-power LED lamps are connected in parallel. Connected to the light source circuit, the driving power supply includes an electromagnetic compatibility module, a rectification module, a constant voltage control module and a high frequency pulse width modulation module, the electromagnetic compatibility module, the rectification module, the constant voltage control module and the high frequency pulse width modulation module The modulation modules are sequentially connected in series.

Description

A high-power LED single drive power supply system

technical field

The utility model relates to a driving power supply system for high-power LEDs, in particular to a system which can drive several high-power LEDs to work at the same time only by setting a single driving power supply in the circuit.

Background technique

As we all know, LED, also known as light-emitting diode, is a solid-state semiconductor device that can directly convert electricity into light energy. Because the LED illuminant has the characteristics of energy saving, long service life, and no harmful substances such as mercury inside for easy recycling, LED has been widely used in people's production and life. The inherent characteristics of LED determine its It is the most ideal light source to replace the traditional light source. In actual implementation, the LED is basically a small chip encapsulated in epoxy resin, so its volume is very small and very light.

It is precisely because of the advantages of the above-mentioned LEDs that LED technology has been widely used in people's lives now, but the power of general LED light sources is relatively small. When the lighting brightness needs to be strong, a large number of LEDs need to be connected together. In order to improve the overall lighting intensity, with the advancement of technology, high-power LEDs have gradually entered people's field of vision. High-power LEDs have improved the overall lighting intensity and brightness of LEDs, so now various manufacturers are using high-power LEDs to replace Traditional LEDs.

LEDs need a constant voltage and constant current working current when they are actually performing lighting work, so LED lamps need to be equipped with relevant driving power sources. LED lights are realized with an independent LED drive power supply. As shown in Figure 1, it is a schematic diagram of the configuration of a traditional high-power LED drive power supply. There are several groups of high-power LED lights connected in parallel on the external circuit A. In each group of high-power An independent driving power supply is arranged between the LED lamp and the external circuit A, and the technical solutions thereof all adopt constant current driving. However, when this connection driving method is actually implemented, first of all, the cost of the overall product is relatively high, because each group of high-power LED lights needs to be equipped with an independent driving power supply during the specific implementation, so that the driving power accounts for the entire lighting equipment. Secondly, because each group of high-power LED lamps is equipped with an independent driving power supply, the workload of installation is relatively large during actual installation. In addition, the steps of maintaining and replacing the driving power supply are quite complicated. Cumbersome, as mentioned above, is the main shortcoming of conventional technology.

Utility model content

The utility model provides a high-power LED single-drive power supply system. Only a single drive power supply is set in the circuit to drive several high-power LEDs to work at the same time and has the characteristics of simple structure and low cost. The main purpose of the new type.

The technical solution adopted by the utility model is: a high-power LED single drive power system, which includes an external circuit, a drive power supply and several high-power LED lamps, the drive power supply is connected in series to the external circuit, and the external circuit Isolated into a mains circuit and a light source circuit, wherein the mains circuit is connected to an external mains, and several high-power LED lamps are connected in parallel to the light source circuit. The drive power includes an electromagnetic compatibility module, a rectifier module, a constant voltage control module and The high frequency pulse width modulation module, the electromagnetic compatibility module, the rectification module, the constant voltage control module and the high frequency pulse width modulation module are sequentially connected in series.

In the first preferred embodiment of the present utility model, each of the high-power LED lamps includes a high-power LED light source and a resistor, and the resistor is connected in series with the high-power LED light source.

In the second preferred embodiment of the present utility model, each of the high-power LED lamps includes a high-power LED light source and a converter, and the converter is connected in series with the high-power LED light source.

The beneficial effects of the utility model are as follows: when the utility model is working specifically, the external mains in the mains circuit first passes through the electromagnetic compatibility module for electromagnetic compatibility processing, then passes through the rectification module for rectification processing, and then passes through the constant The voltage control module performs constant voltage processing, and finally performs pulse width modulation through the high-frequency pulse width modulation module. After the external mains power in the mains circuit is processed by the driving power supply, it is transmitted to the light source circuit to serve as several high-power LED lamps. Provide working current. In the technical solution of the utility model, the only driving power supply is connected to the external circuit, and the external mains power of the external circuit is processed and transformed by the driving power supply to form a number of working currents that can be directly used by the high-power LED lamps. The effect of reducing the number of driving power sources and simplifying the overall circuit structure is achieved.

Description of drawings

Fig. 1 is a block diagram of the circuit principle of the conventional technology.

Fig. 2 is the block diagram of circuit principle of the present utility model.

Fig. 3 is a circuit principle block diagram of the driving power supply of the present invention.

Fig. 4 is a schematic block diagram of the circuit of the first preferred embodiment of the utility model.

Fig. 5 is a block diagram of the circuit principle of the second preferred embodiment of the present invention.

Detailed ways

As shown in FIGS. 2 to 5 , a high-power LED single driving power supply system includes an external circuit 10 , a driving power supply 20 and several high-power LED lamps 30 . The driving power supply 20 is connected in series to the external circuit 10 , and the current in the external circuit 10 is filtered, rectified and decompressed by the driving power supply 20 . The driving power supply 20 is connected to the external circuit 10 and isolates the external circuit 10 into a mains circuit 11 and a light source circuit 12 . Wherein, the mains circuit 11 is connected to an external mains, and several high-power LED lamps 30 are connected in parallel to the light source circuit 12 .

As shown in FIG. 3 , the drive power supply 20 includes an electromagnetic compatibility (EMC) module 21 , a rectification module 22 , a constant voltage control module 23 and a high frequency pulse width modulation (PWM) module 24 . The electromagnetic compatibility (EMC) module 21 , the rectification module 22 , the constant voltage control module 23 and the high frequency pulse width modulation (PWM) module 24 are sequentially connected in series. The external mains in the mains circuit 11 first passes through the electromagnetic compatibility (EMC) module 21 for electromagnetic compatibility processing, then through the rectification module 22 for rectification processing, then through the constant voltage control module 23 for constant voltage processing, and finally Pulse width modulation is performed via the high frequency pulse width modulation (PWM) module 24 .

The external commercial power in the commercial power circuit 11 is processed by the driving power supply 20 and then transmitted to the light source circuit 12 to provide working current for several high-power LED lamps 30 .

As mentioned above, in the technical solution of the present utility model, the only driving power supply 20 is connected to the external circuit 10, and the external mains power of the external circuit 10 is processed and transformed by the driving power supply 20 to form several high-power LED lamps 30 The operating current that can be directly used can reduce the number of driving power sources and simplify the overall circuit structure.

As shown in FIG. 4 , in the first preferred embodiment of the present invention, the mains circuit 11 of the external circuit 10 is a high-voltage current or a low-voltage current.

Specifically described as high-voltage current exceeding 220 volts, low-voltage current below 220 volts,

The current in the mains circuit 11 is converted into low-voltage current through the driving power supply 20 and transmitted to the light source circuit 12 to provide working current for several high-power LED lamps 30. At this moment, the low-voltage current voltage in the light source circuit 12 is less than Equals 220 volts.

During specific implementation, the voltage of the low-voltage current in the light source circuit 12 may be 12 volts or 24 volts.

Each high-power LED lamp 30 includes a high-power LED light source 31 and a resistor 32 .

The resistor 32 is connected in series with the high-power LED light source 31 .

As shown in FIG. 5 , in the second preferred embodiment of the present invention, the commercial power circuit 11 of the external circuit 10 is a high-voltage current.

It is specifically described as a high-voltage current exceeding or equal to 220 volts, and a low-voltage current below 220 volts.

The current in the mains circuit 11 is converted by the driving power supply 20 and then transmitted to the light source circuit 12 to provide working current for the high-power LED lamps 30. At this moment, the current in the light source circuit 12 is also a high-voltage current.

During specific implementation, the voltage of the high voltage current in the light source circuit 12 may be 220 volts.

Each of the high-power LED lamps 30 includes a high-power LED light source 31 and a converter 33 . The converter 33 is connected in series with the high-power LED light source 31 . The converter 33 converts the high-voltage current in the light source circuit 12 into a low-voltage current and performs rectification and filtering to drive the high-power LED light source 31 to emit light.

In actual implementation, since the high-power LED light source 31 is driven by low voltage, the converter 33 does not have the function of constant voltage or constant current, and the function of the converter 33 is only to convert the high-voltage current into a low-voltage current. , and then rectified and filtered, and output to the high-power LED light source 31.

It is worth noting here that the high-power LEDs mentioned in the utility model can reach 1W, 2W, or even tens of watts, and the operating current can range from tens of milliamperes to hundreds of milliamperes.

In the first preferred embodiment of the present utility model, the output of the driving power supply is a low-voltage voltage, such as 12 volts and 24 volts. On the high-power LED lamp, only a 0.5-watt resistor needs to be connected in series with the LED lamp bead, and there is no other electronic voltage. The components have a simple overall structure and low product cost.

In the second preferred embodiment of the present utility model, the drive power output is high-voltage electricity, such as 220 volts. The function of the converter in the figure is to convert the high-voltage output of the drive power into a low-voltage output to drive high-power LED lamps, because High power LED lights are low voltage. The converter in the picture can neither be constant voltage nor constant current. Its function is to change high voltage to low voltage, then rectify and filter, and output to high-power LED lights. Both of the above two implementations can realize "one driving power supply drives more than one high-power LED lamp."

The above various embodiments only express several specific implementation modes of the present utility model, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the present utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present utility model should be based on the appended claims.

Claims (3)

1. A single driving power supply system for high-power LEDs, characterized in that: it includes an external circuit, a driving power supply and a number of high-power LED lamps, the driving power supply is connected in series in the external circuit, and the external circuit is isolated into a mains supply circuit and a light source circuit, wherein the mains circuit is connected to an external mains, several high-power LED lamps are connected in parallel to the light source circuit, and the drive power includes an electromagnetic compatibility module, a rectifier module, a constant voltage control module and a high-frequency pulse width The modulation module, the electromagnetic compatibility module, the rectification module, the constant voltage control module and the high frequency pulse width modulation module are sequentially connected in series. 2. A high-power LED single driving power supply system as claimed in claim 1, wherein each high-power LED lamp includes a high-power LED light source and a resistor, and the resistor is connected in series with the high-power LED light source. 3. A high-power LED single driving power supply system as claimed in claim 1, characterized in that: each of the high-power LED lamps includes a high-power LED light source and a converter, and the converter is connected in series with the high-power LED light source connect.

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