KR20090131947A - Power supply for led ramp without transfromer and led ramp wiht therof - Google Patents

Abstract

PURPOSE: A device for supplying power to an LED lamp without a transformer and the LED lamp with the device are provided to simplify the structure of the LED lamp. CONSTITUTION: The first and second AC(Alternating Current) converting units(110,120) converts input AC power into AC power for driving of a rectifier(130). The rectifier converts output AC power of the first and second AC converting units into DC power. A smoothing circuit unit(140) smoothes output power of the rectifier. The smoothing circuit unit offers the output power to an LED(Light Emitting Diode) column.

Description

Transformer-supplied LED lamp power supply and LED lamp with the power supply TECHNICAL FIELD {POWER SUPPLY FOR LED RAMP WITHOUT TRANSFROMER AND LED RAMP WIHT THEROF}

The present invention relates to a power supply for an LED lamp, and to a transformer-excluded LED lamp power supply that can provide the driving power of the LED lamp without having a transformer and to the LED lamp with the power supply It is about.

LED RAMP operates at low power and can significantly reduce power consumption.In spite of low power, LED RAMP emits light with significantly higher illuminance than illuminators such as flashlights, street lamps, and discharge lamps. It is used as an illuminator in various fields in place of illuminators such as heating lamps and discharge lamps.

Figure 1 shows an example of the LED lamp of the prior art as described above, the LED lamp of the prior art, as shown in Figure 1, the power supply device 400 and the LED of the switching mode power supply (SMPS) method ( LED) array 410, the power supply 400 is a noise filter 401, a diode bridge 402, a voltage detector 403, a temperature detector 404, a power factor correction and switching circuit 405, It is composed of a transformer 406, a secondary rectifier 407, and the like after rectifying the commercial power supply to generate an LED driving power source having a suitable voltage and current for driving the LED lamp using the transformer 406 And supplies to the LED array 410 to perform illumination.

That is, the LED lamp of the prior art must be provided with a transformer 406 to generate the LED drive power.

Therefore, the LED lamp of the prior art becomes complicated due to the configuration of the transformer, thereby reducing the productivity, as well as having problems such as power consumption by the transformer 406.

Therefore, the present invention is to solve the above-mentioned problems of the prior art, it is possible to generate the LED driving power without having a transformer, thereby simplifying the structure to improve productivity, and eliminate the occurrence of power loss by the transformer It is an object of the present invention to provide a transformer-excluded LED lamp power supply device and an LED lamp having the power supply device.

The transformer-excluded LED lamp power supply device of the present invention (hereinafter referred to as "LED lamp power supply") for achieving the above object is to convert the AC power supply into an AC power source for driving the rectifier. First and second AC power conversion units connected to both sides of the input terminal; An input terminal connected to each output side of each of the first and second AC power conversion units, the rectifying unit converting the output AC power of the first and second AC power conversion units into DC power and outputting the DC power; And a smoothing circuit unit connected in parallel to the output terminals of the rectifying unit and smoothed after receiving the output power of the rectifying unit to provide an LED string.

In the above-described configuration, the first and second AC power conversion units and the smoothing circuit unit further include a capacitor string connected in parallel to form a desired AC voltage and a resistor connected in parallel with the capacitor string. In this case, the resistance determines the voltage applied to both ends of the first and second AC power converters, and when the LED lamp power supply is terminated, the electric charges charged in the capacitor rows are discharged so that the LED lamps of the LED rows remain afterimage. To prevent them. The capacitor row reduces power consumption due to heat generation in the resistor by reducing the current flowing through the resistor.

The rectifier includes, but is not limited to, a bridge diode having both ends of the input side connected to the output side of the first and second AC power conversion units, respectively, and the output side connected to the smoothing circuit unit and the LED string in parallel.

Referring to the operation of the LED lamp power supply and the LED lamp of the present invention having the above-described configuration is as follows.

First, the transformer-excluded LED lamp power supply of the present invention is the AC power of 0 ° ~ 180 ° phase of the AC power source, such as 220V commercial power input for the first AC power conversion unit for driving the rectifier consisting of a bridge diode, etc. Convert to AC power with proper voltage, and convert AC power with 180 ° ~ 360 ° phase into AC power with proper voltage for driving rectifier, which is composed of bridge diode. Output to the rectifier. At this time, it is apparent that the AC power of 0 ° to 180 ° phases may be configured such that the second AC power conversion part converts the AC power of 180 ° to 360 ° phase to the first AC power conversion part of the rectifier.

Thereafter, the rectifying unit formed of a bridge diode or the like performs full-wave rectification on the converted AC power input from the first and second AC power converters to output the DC power.

The capacitors of the smoothing circuit part connected in parallel with the rectifying part are charged by the full-wave rectified DC power output from the rectifying part to compensate for the voltage drop during the voltage drop of the rectifying part to generate a stable DC power source and then drive it with the LED string connected to the smoothing circuit part. The power supply is turned on so that the LED string can be stably illuminated.

In addition, the LED lamp having the LED lamp power supply of the present invention receives the power supplied from the transformer-excluded LED lamp power supply to perform the illumination.

The present invention having the above-described configuration and operation can simplify the structure of the LED lamp by not having a transformer, which is an essential component of the LED lamp, thereby significantly reducing its size, and thus providing an effect of improving productivity. do.

In addition, the present invention provides an effect that can significantly reduce the power consumption by not having a high power consumption transformer.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

2 is a circuit diagram of an LED lamp with a transformer-excluded LED lamp power supply 100 (hereinafter referred to as "LED lamp power supply 100") according to an embodiment of the present invention.

The LED lamp power supply device 100 of the present invention as shown in FIG. 2 is the first AC power conversion unit 110 and the second AC power conversion unit 120 connected in series to both sides of the AC power source 101, respectively. ), A rectifying unit including a bridge diode in which an output terminal of the first AC power converter 110 is connected to the first input terminal 131 and an output terminal of the second AC power converter 120 is connected to the second input terminal 132. 130, and a smoothing circuit section 140 connected in parallel to the first output terminal 133 and the second output terminal 134 of the bridge diode as the output terminal of the rectifier 130.

In the above-described configuration, the first AC power conversion unit 110, the second AC power conversion unit 120, and the smoothing circuit unit 140 may each include a plurality of capacitors C1 to C6 connected in parallel to output an appropriate voltage. And a resistor connected in parallel with the capacitor string. The first AC power converting unit 110 and the second AC power converting unit 120 having such a configuration are commercially inputted by generating a voltage difference between both ends by charging the capacitor strings C1, C2, C3, and C4. It converts the voltage of AC power. In addition, the capacitor rows C1, C2, C3, and C4 prevent excessive current from flowing through the resistors R1 and R2, thereby preventing power loss caused by the resistors R1 and R2. The resistors R1 and R2 connected in parallel with the capacitor strings C1, C2, C3, and C4 discharge the electric charges charged in the capacitor string when the LED lamp power supply 100 is driven, thereby discharging the LED lamps of the LED string. Prevents afterimages.

Next, the smoothing circuit unit 140 compensates when the capacitors C5 and C6 are charged by the DC power output from the rectifying unit 130 and the voltage of the power output from the rectifying unit is reduced, thereby rectifying and outputting the rectifying unit. To smooth. That is, the output voltage of the smoothing circuit unit 140 is caused by the capacitors C5 and C6 to reduce the ripple of the DC power supply due to the periodic increase and decrease from the maximum value of the half-wave voltage having a positive output voltage to the zero voltage. By reducing it, a stable direct current power is supplied to the LED row 150.

And when the LED string 150 is connected in parallel to the smoothing circuit unit 140 of the LED lamp power supply 100 having the above-described configuration provided with a transformer-excluded LED lamp power supply according to an embodiment of the present invention LED lamp 200 (hereinafter referred to as "LED lamp 200").

The operation of the LED lamp power supply device 100 and the LED lamp 200 of FIG. 2 having the configuration as described above will be described below.

When power is input from the AC power source 101, the first AC power converter 110 and the second AC power converter 120 are each 0 ° to 180 ° phase AC power and 180 ° to 360 ° phase (or AC power of 180 ° ~ 360 ° phase and AC power of 0 ° ~ 180 ° phase are alternately charged and discharged to generate AC power having a voltage suitable for driving the rectifier.

 When the AC power having a voltage suitable for driving the rectifier 130 is output from the first AC power converter 110 and the second AC power converter 120, the rectifier 130 formed of a bridge diode is inputted AC power. By performing full-wave rectification with respect to DC power, it converts and outputs.

The DC power output from the rectifier 130 charges the capacitors C5 and C6 of the smoothing circuit unit 140 connected in parallel with the rectifier 130 and the LED column 150, and the capacitors C5 and C6. Is the ripple of the power source that varies from the positive maximum value to zero voltage by adjusting the time constant of charge / discharge by the power supply having the maximum value positively output from the rectifier 130 and the output voltage that is increased or decreased to have zero voltage. The phenomenon is reduced to form a stable DC power supply. That is, the smoothing circuit unit 140 outputs from the rectifying unit 130 to smooth the DC power supplied to the LED column 150 so that the LED column 150 can be driven stably.

Next, when the LED string 150 is connected in parallel to both ends of the smoothing circuit unit 140 of the power supply device 100 of the LED lamp having the configuration as described above (LED lamp as an embodiment of the present invention ( 200).

3 to 5 is a picture of the LED lamp manufactured according to the circuit diagram of FIG. 2 described above, as can be seen in the picture of FIGS. 3 to 5 provided with a transformer-excluded LED lamp power supply according to the present invention. LED lamp can be seen that not only the structure is simple but also the size is significantly smaller.

1 is a circuit diagram of an LED lamp of the prior art,

2 is a circuit diagram of an LED lamp according to an embodiment of the present invention;

3 to 5 is a picture of the LED lamp produced by the present invention.

Description of the main symbols in the drawings

100: transformerless LED lamp power supply (LED lamp power supply)

110: first AC power conversion unit 120: second AC power conversion unit

130: rectifier 140: smooth circuit

150: led fever

LED1 ~ LED12: LED

Claims (4)

First and second AC power converters respectively connected to both sides of an input terminal of the AC power source to convert an input AC power source into an AC power source for driving the rectifier; An input terminal connected to each output side of each of the first and second AC power conversion units, the rectifying unit converting the output AC power of the first and second AC power conversion units into DC power and outputting the DC power; And a smoothing circuit unit connected to the output terminals of the rectifying unit in parallel and smoothed after receiving the output power of the rectifying unit to provide an LED string. The transformer-excluded LED lamp power supply comprising: The method of claim 1, wherein any one of the first AC power converter, the second AC power converter, and the smoothing circuit part comprises a capacitor string connected in parallel to form a desired AC voltage and a resistor connected in parallel with the capacitor string. Transformer-free LED lamp power supply characterized in that the. The rectifier according to any one of claims 1 to 2, wherein the rectifying section is constituted by a bridge diode whose both ends on the input side are connected to the output side of the first and second AC power conversion sections, respectively, and the output side is connected in parallel to the smoothing circuit section and the LED string. Transformer-free LED lamp power supply characterized in that the. First and second AC power converters respectively connected to both sides of an input terminal of the AC power source to convert an input AC power source into an AC power source for driving the rectifier; An input terminal connected to each output side of each of the first and second AC power conversion units, the rectifying unit converting the output AC power of the first and second AC power conversion units into DC power and outputting the DC power; A smoothing circuit unit connected to the output terminals of the rectifying unit in parallel and smoothed after receiving the output power of the rectifying unit to provide an LED string; An LED lamp having a transformer-excluded LED lamp power supply, characterized in that it comprises a; LED column connected in parallel with the smoothing circuit portion and a plurality of LED lamps are formed.

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