KR102260295B1 - LED module power supply converter with PCB pattern-connected surge voltage protection circuit - Google Patents

Abstract

In order to protect an LED module from a surge voltage that may be generated when the LED module is connected to an output terminal of a converter for an LED module power supply, an objective of the present invention is to allow a provided separate safety capacitor to reduce an electromagnetic wave and to reduce a deviation of an electromagnetic wave compatibility for each product. The present invention comprises: a safety part (10) that protects a converter for an LED module power supply by blocking input of an overcurrent to a commercial power; and a first rectifying part (30) for full-wave rectification of the commercial power outputted from the first electromagnetic interference (EMI) filter part (20).

Description

LED module power supply converter with PCB pattern-connected surge voltage protection circuit

The present invention relates to a converter for supplying power to an LED module, and more particularly, to a surge voltage protection circuit capable of protecting an LED module from surge voltage that may be generated when an LED module is connected to an output terminal of the converter for supplying power to an LED module. LED module power supply converter equipped with a PCB pattern-linked surge voltage protection circuit configured by printing the output terminal of the converter, the safety capacitor, and the electrical connection to the ground with a PCB pattern instead of a wire by allowing it to flow to the ground through the safety capacitor will be.

The light source of lighting fixtures is incandescent lamp and fluorescent lamp, and recently LED is used.

LED has various advantages such as high illuminance but low power consumption, semi-permanent lifespan, eco-friendly and emotional lighting, etc.

Lighting devices using LEDs as light sources have been developed in various ways, such as Open Utility Model No. 2008-0000299 "LED Lighting Device" and 2008-0001662 "Home LED Lamp Lighting".

The LED lighting device includes an LED module, a converter, and a frame.

A converter is a power supply device that receives commercial power to turn on the LED, converts it into rated power required for lighting, and supplies it.

In general, the converter for LED has a transformer and a PWM unit that switches the transformer in a PWM method to convert commercial power into rated power, and as suggested in Patent Registration No. 0910198 "Constant current type power supply for high-brightness LED lighting devices" As energy efficiency is emphasized, a converter having a power factor improving unit for improving the power factor of commercial power has been recently released.

Unlike other components, since this converter is a device that converts and supplies an external voltage suitable for driving the LED, not only generates a lot of heat in the process of converting the voltage, but also it is installed in a state exposed to the external environment. The outside of the furnace is driven while being directly or indirectly affected by dust or changing seasons.

As disclosed in Patent Publication No. 10-1600537 "LED Lighting Light Converter" among conventional LED lighting converters, it is mounted inside the casing and the casing, converts the external input voltage into a voltage suitable for driving the LED element, and supplies it to the LED lighting. It consists of an internal circuit part.

Since a plurality of LED lighting fixtures are connected to one converter in the current converter for LED lighting, when connecting the LED lighting fixtures connected to the converter in the field, the operator guesses the number of LED lighting fixtures and connects them to the converter. If the power used by the lighting equipment exceeds the capacity of the converter, the converter may be damaged, or if a surge voltage is generated due to environmental factors such as a narrow gap between the LED pattern and the structure, the LED may be damaged. Countermeasures against environmental factors are required.

Patent Document 1: Republic of Korea Public Utility Model No. 2008-0000299 Patent Document 2: Republic of Korea Public Utility Model No. 2008-0001662 Patent Document 3: Republic of Korea Patent No. 10-0910198 Patent Document 4: Republic of Korea Patent Registration No. 10-1600537

Therefore, the present invention is to solve the various disadvantages and problems of the prior art as described above, and in order to protect the LED module from the surge voltage that may be generated when the LED module is connected to the output terminal of the LED module power supply converter, a separate Equipped with safety capacitors to reduce electromagnetic waves and variations in electromagnetic compatibility for each product, and to protect the LED module by escaping the spike voltage that may occur when the gap between the LED pattern and the steel frame is narrow to the ground through the safety capacitor. The purpose of this is to provide a converter for power supply to an LED module equipped with a PCB pattern-linked surge voltage protection circuit composed by printing the output terminal of the converter, the safety capacitor, and the electrical connection to the ground in a pattern instead of a wire. will be.

The present invention for achieving the above object is electrically connected to the output side of the safety part, which protects the converter for LED module power supply by blocking the input of overcurrent to the commercial power supply, and the conductive noise contained in the commercial power supply is reduced by 1 The first EMI (Electro Magnetic Interference) filter unit that removes the difference, the first rectifier that full-wave rectifies the commercial power output from the first EMI filter unit, and outputs the rated power with improved power factor by transforming the pulsating power output from the first rectifying unit Insulation transformer, the controller unit for controlling the isolation transformer, the switching unit for turning the isolation transformer on and off according to the control of the controller unit, the second rectifying unit for directing the output power induced in the secondary side of the insulating transformer, direct current from the second rectifying unit The second EMI filter unit that removes conductive noise that may be included in the standardized rated power and supplies it to the output connection connector that is connected to the LED module and supplies the rated power, and the signal generated from the LED module connected to the output connection connector (90). A LED module surge voltage prevention unit that serves as a secondary ground when an intelligent voltage is generated, and the LED module surge voltage prevention unit is configured between the output connection connector and the primary ground (FG), and the LED module surge It provides a converter for power supply to an LED module having a PCB pattern-linked surge voltage protection circuit, characterized in that the voltage protection unit, the output connection connector, and the primary ground (FG) are printed in a pattern on the PCB.

Here, the LED module surge voltage prevention unit converts the surge voltage generated when the distance between the LED pattern and the steel structure (frame) to the primary ground (FG) when the gap between the LED pattern and the steel structure (frame) is narrow according to the miniaturization of the converter. It is characterized by outflow.

According to an embodiment of the present invention, the following effects are obtained.

First, a separate safety capacitor is provided to protect the LED module from surge voltages that may be generated when the LED module is connected to the output terminal of the converter for power supply to the LED module, thereby reducing electromagnetic waves and reducing electromagnetic wave compatibility deviations for each product.

Second, it is possible to protect the LED module by escaping the spike voltage that may occur when the gap between the LED pattern and the steel structure is narrow to the ground through the safety capacitor.

Third, since the electrical connection between the output terminal of the converter, the safety capacitor, and the ground is made of a PCB pattern instead of a wire, when it is configured with a wire, it is possible to minimize interference with various parts of the converter for power supply to the LED module. That is, in the case of a wire configuration, a problem that may occur due to interference between parts or the influence of an external environment when a wire is configured between or over parts of an existing standard can be solved by printing a pattern.

1 is a circuit diagram for explaining an embodiment of a converter for supplying power to an LED module having a PCB pattern-linked surge voltage protection circuit according to the present invention;
FIG. 2 is a diagram showing the printed circuit board pattern of the output terminal of the converter, the safety capacitor, and the electrical connection to the ground in the converter for power supply of an LED module having a PCB pattern-linked surge voltage protection circuit according to the present invention.
3 is a photograph showing the wires attached to the converter for power supply to the LED module.

The terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and the inventor can properly define the concept of the term in order to best describe his invention. Based on the principle, it should be interpreted as meaning and concept consistent with the technical spirit of the present invention, and the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention, so the technical spirit of the present invention It should not be construed as representing all of them, and it should be understood that there may be various equivalents and modifications.

Hereinafter, a preferred embodiment of a converter for supplying power to an LED module having a PCB pattern-linked surge voltage protection circuit according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a circuit diagram for explaining an embodiment of a converter for supplying power to an LED module having a PCB pattern-linked surge voltage protection circuit according to the present invention.

As shown in FIG. 1, the converter for supplying power to an LED module having a surge voltage protection circuit according to the present invention includes a safety unit 10, a first EMI (Electro Magnetic Interference) filter unit 20, a first rectifier unit 30, Controller unit 40, switching unit 50, insulation transformer 60, second rectifying unit 70, second (Electro Magnetic Interference) filter unit 80, output connection connector 90 and LED module surge voltage prevention It is configured to include a part 100 .

Here, the safety unit 10 protects the converter for supplying power to the LED module by blocking the input of overcurrent with commercial power. The safety part 10 has one end connected to the other end of a fuse F1 having one end connected to the single-phase neutral wire N, one end connected to the neutral wire N, and the other end connected to the varistor with the other end connected to the live wire L. It may consist of (V1). Here, the neutral wire (N) and the live wire (L) are input parts.

The first EMI (Electro Magnetic Interference) filter unit 20 is connected to the output side of the safety unit 10 to primarily remove conductive noise included in the input commercial power. The first EMI (Electro Magnetic Interference) filter unit 20 includes a line filter LF1, capacitors CX1 and CX2 connected in parallel to an input side and an output side of the line filter LF1, respectively, and an output capacitor of the line filter LF1. At the output side of (CX2), there are two capacitors (CY1, CY2) connected in series with the live wire (L) and the neutral wire (N), and the middle contact of the two capacitors (CY1, CY2) is grounded (FG) to conduct noise contained in commercial power. Remove it by flushing it to the ground.

The first rectifying unit 30 full-wave rectifies the commercial power output from the first Electro Magnetic Interference (EMI) filter unit 20 . The first rectifying unit 30 is composed of bridge diodes D1 to D4 to supply a DC voltage.

The controller unit 40 controls switching so that the rated power is output from the insulation transformer 60 .

This controller unit 40 is a PWM driver (U1) that controls the switching of the switching unit 50 that switches the isolation transformer 60 on and off, and a start voltage for initial driving of the PWM driver U1. The start resistors R2 and R3 and the capacitor EC1, and the sensing resistor R10 and the capacitor C1 for sensing the current induced in the magnetic flux-coupled auxiliary coil wound on the primary side of the insulation transformer 60 and the like are included. is composed by

After power is applied from the input parts (L, N), the DC voltage rectified by the first rectifying part 30 is simultaneously connected to the 5th pin of the transformer (T1) 60 through R2 and R3 through D1 and R4 connected to EC1 and C2. It starts to drive the PWM driver (U1) through the 5th pin (Vin) of the PWM driver (U1) while charging.

Thereafter, the voltage level between R5 and R6 connected to pin 5 of the transformer (T1) 60 is sensed to determine whether the fourth pin (Vsense) of the PWM driver U1 is driven. At this time, when an appropriate voltage is detected at pin 4 (Vsense) of the PWM driver (u1), pin 1 (Isense) of the PWM driver senses the resistance values of CS1 to CS5 through R14 and VR1 and outputs (final output current) determines the quantity.

At the same time, the gate signal of the switching unit 50 is applied through R11 from the 6th pin (Drive) of the PWM driver U1 to drive the switching unit 50 , and when the switching unit 50 is driven, the entire converter circuit is operated. Pin 3 (COMP) of the PWM driver (U1) adjusts the compensation of the overall operation through the RC circuit of R10 and C1.

The switching unit 50 turns on/off the insulation transformer 60 according to the control of the controller unit 40 . This switching unit 50 is composed of a field effect transistor (Q1).

The insulation transformer 60 transforms and transforms the pulsating power output from the first rectifying unit 30 to output rated power having an improved power factor.

The second rectifying unit 70 directs the output power induced on the secondary side of the insulating transformer 60 . The second rectifying unit 70 has three diodes D3, D4, and D5 connected in parallel.

The second EMI (Electro Magnetic Interference) filter unit 80 removes conductive noise that may be included in the rated power rectified by the second rectifier 70 and supplies it to the output connection connector 90 connected to the LED module. This second EMI filter unit 20 is composed of a line filter (LF2).

The output connection connector 90 is connected to the LED module to supply rated power to the LED module.

The LED module surge voltage prevention unit 100 is configured between the primary ground (FG) and the second rectifying unit 70 to serve as a secondary ground, thereby reducing electromagnetic waves and reducing electromagnetic compatibility (CE, RE) deviations by product. In general, when the distance between the LED pattern and the steel structure (frame) is narrow according to the miniaturization of the converter, a spike-like voltage may be generated. It flows out to the primary ground FG through the voltage prevention unit 100 . When installing the LED connected to the converter output, it is possible to protect the LED module from surge voltage caused by environmental factors. In addition, even when a spike voltage is generated from the LED module, it can be discharged through the LED module surge voltage prevention unit 100 . This LED module surge voltage prevention unit 100 is composed of a capacitor (CY4).

On the other hand, for the secondary grounding role of the LED module surge voltage prevention unit 100, the primary ground (FG) constitutes a separate ground terminal unit 110 in a steel structure constituting the converter, and the corresponding ground terminal unit 110 ) may be connected to one terminal of the capacitor CY2 constituting the LED module surge voltage prevention unit 100 .

And a third EMI filter unit 120 is configured between the first rectifying unit 30 and the controller unit 50 to remove conductive noise included in the commercial power input connected to the output side of the first rectifying unit 30 . can do. The third EMI filter unit 120 includes a choke coil L1 and a capacitor CX3 to filter EMI noise that may be generated at the output side of the first rectifier 30 .

Also, on the output side of the third EMI filter unit 120 , a second safety unit 130 including a varistor VA2 is further configured to protect the peripheral circuit from overcurrent caused by EMI noise of the third EMI filter unit 120 .

On the other hand, the output side of the second safety unit 130 is connected to the input side of the controller unit 40 and the insulation transformer 60, the peak between the controller unit 40 and the insulation transformer 60 on the output side of the second safety unit 130 A first peak voltage (noise) removing unit 140 for removing the noise is further configured. The first peak voltage (noise) removing unit 140 has one end connected to the output side of the second safety unit 130 and the other end of the capacitor C4 connected in series to the resistor R7, and the anode is an insulating transformer. On the input side of (60), a diode (D2) whose cathode is connected to a resistor (R7), and a resistor (R7) and a capacitor (C4) in parallel between the cathode of the diode (D2) and one end of the resistor (R7) It consists of two resistors (RS1, RS2).

In addition, a fourth EMI filter unit 150 is configured between the input side of the first peak voltage (noise) removing unit 140 and the insulating transformer 60 and the switching unit 50, so that the first peak voltage (noise) Conductive noise that may be generated between the removal unit 140 and the insulating transformer 60 is removed.

In addition, a second peak voltage (noise) removing unit 160 for removing peak noise that may be generated at the output side of the insulating transformer 60 is configured on the input side and the output side of the second rectifying unit 70 . In the second peak voltage (noise) removing unit 160 , two capacitors C5 and C5A are connected in parallel, and a resistor R8 is disposed between the output side of the capacitors C5 and C5A and the secondary rectifying unit 70 . connected in series

Meanwhile, the ripple reduction unit 170 using the electrolytic capacitor EC2 is configured at the input end of the second EMI (Electro Magnetic Interference) filter unit 80 , and the discharge resistor 180 is configured at the output end.

And between the ground side of the ground side of the primary side coil of the insulation transformer 60 and the ground side of the secondary side coil, the noise removing unit 190 for removing the primary and secondary side noises was configured using the capacitor CY3.

FIG. 2 is a view showing that the output terminal of the converter, the safety capacitor, and the electrical connection to the ground are printed in a PCB pattern in the converter for power supply for an LED module having a PCB pattern-linked surge voltage protection circuit according to the present invention, FIG. is a picture showing the wires attached to the converter for power supply to the LED module.

An example in which the output terminal of the converter, the safety capacitor, and the electrical connection to the ground are printed as a PCB pattern in the converter for supplying power to an LED module having a PCB pattern-linked surge voltage protection circuit according to the present invention is printed on the PCB as shown in FIG. The LED module surge voltage prevention unit 100, which is a safety capacitor of the present invention, is mounted in the configured LED module power supply converter, and this LED module surge voltage prevention unit 100 is connected to the output connection connector 90 It occurs in the LED module For the surge voltage (spiking voltage) to be used, the ground terminal unit 110, which is the primary side ground, and the pattern printed example are shown. In this case, compared to the case of using the wire attached to the converter for power supply to the LED module as in FIG. 3, the problem that may occur due to interference between parts or the influence of the external environment is printed in a pattern to minimize or solve the problem. .

Although the present invention has been described with the above examples, the present invention is not necessarily limited to these examples, and various modifications may be made without departing from the technical spirit of the present invention. Therefore, the examples disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these examples. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10: first safety unit 20: first EMI filter unit
30: first rectifying unit 40: controller unit
50: switching unit 60: insulation transformer
70: second rectifying unit 80: second EMI filter unit
90: output connection connector 100: LED module surge voltage prevention part
110: ground terminal unit 120: third EMI filter unit
130: second safety unit 140: first peak voltage removal unit
150: fourth EMI filter unit 160: second peak voltage removing unit
170: ripple reduction unit 180: discharge resistance unit
190: 1-2 vehicle noise reduction part

Claims (2)

a safety unit (10) for protecting the converter for supplying power to the LED module by blocking the input of overcurrent to commercial power;
a first EMI (Electro Magnetic Interference) filter unit 20 electrically connected to the output side of the safety unit 10 to primarily remove conductive noise included in commercial power;
a first rectifying unit 30 for full-wave rectification of commercial power output from the first EMI (Electro Magnetic Interference) filter unit 20;
an insulation transformer 60 for outputting rated power having an improved power factor by transforming the pulsating power output from the first rectifying unit 30;
a controller unit 40 for controlling the isolation transformer 60;
a switching unit 50 for turning on/off the insulation transformer 60 according to the control of the controller unit 40;
a second rectifying unit 70 for directing the output power induced on the secondary side of the insulating transformer 60;
a second EMI filter unit 80 that removes conductive noise that may be included in the rated power rectified by the second rectifier 70 and supplies it to the output connection connector 90 that is connected to the LED module and supplies the rated power; and
an LED module surge voltage prevention unit 100 serving as a secondary ground by leaking a surge voltage to a primary ground (FG) when a surge voltage generated in the LED module connected to the output connection connector 90 is generated;
A third EMI filter unit 120 configured between the first rectifying unit 30 and the controller unit 40 and connected to the output side of the first rectifying unit 30 to filter EMI noise included in the input commercial power. );
a second safety unit 130 configured on the output side of the third EMI filter unit 120 and configured as a varistor (VA2) for protecting peripheral circuits from overcurrent caused by EMI noise of the third EMI filter unit 120;
a first peak voltage (noise) removing unit 140 configured between the controller unit 40 on the output side of the second safety unit 130 and the insulating transformer 60 to remove peak noise;
The first peak voltage (noise) removing unit 140 is configured between the input side of the insulating transformer 60 and the switching unit 50 and the first peak voltage (noise) removing unit 140 . and a fourth EMI filter unit 150 for removing conductive noise that may be generated between the insulation transformer 60 and the insulation transformer 60; and
a second peak voltage (noise) removal unit 160 configured on the input side and the output side of the second rectifying unit 70 to remove peak noise that may be generated at the output side of the insulating transformer 60; is composed by
The LED module surge voltage prevention unit 100 is configured between the output connection connector 90 and the primary ground (FG), and the LED module surge voltage prevention unit 100 and the output connection connector 90 and 1 A converter for LED module power supply with a PCB pattern-linked surge voltage protection circuit, characterized in that the primary ground (FG) is printed as a pattern on the PCB. delete

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