KR102554373B1 - Xenon lamp ballast output controlling device - Google Patents

Abstract

The present invention discloses an output control device for a xenon lamp ballast, and the ballast output control device of this embodiment includes an AC rectifier for receiving and rectifying AC power, a power factor corrector for correcting the power factor of the rectified power, and a power factor corrected power. A main power supply unit providing output power, a circuit driving power supply unit supplying DC power for circuit driving to the main power supply unit, a power factor control unit controlling the power factor of the rectified power, and the xenon lamp as power supplied from the main power supply unit. A lamp output driver that outputs a voltage for driving, a control unit that provides an output control signal of the lamp output driver, a temperature sensor that senses an internal temperature and provides data of a temperature value to the controller, and an internal heat and a heat dissipation plate for discharging to the outside, and the xenon lamp is turned on by a soft start by applying a discharge voltage applied during initial lighting as a divided pulse width divided into a plurality of widths.

Description

Xenon lamp ballast output control device {XENON LAMP BALLAST OUTPUT CONTROLLING DEVICE}

The present invention discloses a device for controlling the output of a xenon lamp ballast.

In general, a xenon lamp is a lighting device that uses xenon gas instead of mercury vapor and provides practically usable light with ultraviolet rays and visible rays generated by a discharge tube, which is a plasma generating unit inside a bulb.

Compared to other lighting devices, the xenon lamp emits light closest to natural light, is environmentally friendly because it does not use mercury, and has the advantage of being able to easily adjust the luminous intensity, so it is applied to various fields.

However, compared to lamps of other light sources, the xenon lamp requires a high initial lighting voltage and has a short lifespan. That is, the xenon lamp requires a high lighting voltage of about 23,000V at the time of initial lighting, and this high initial voltage acts as a burden on the electrode inside the discharge tube, and the life of the lamp is short, about 5,000 hours.

In addition, in most xenon lamps, the electronic ballast does not operate until the lifespan calculated at the time of design. For example, LED ballasts are designed and released with a lifespan of 50,000 hours, but in reality, failure often occurs within thousands of hours. This is due to the fundamental design and quality of the electronic ballast, but the cause can be found in the environment where the installation is vulnerable. This is because lamps and electronic ballasts, even perfectly designed products, have their lifespan shortened depending on the ambient temperature and ventilation conditions of the place where they are installed. In other words, lamps or ballasts may be damaged because they operate in much more vulnerable conditions than those considered in the design of these products in adverse conditions, such as where temperature and humidity change greatly due to weather changes in the installed area or place or where ventilation is poor. This is because it is often worn and damaged.

To solve this problem, in order to predict the installation situation and make a perfect product, it is possible to select and use the material of the product appropriately, but this is related to the manufacturing cost according to the cost of the material, which requires a lot of manufacturing cost. .

The present invention has been proposed to solve the above problems, and after power is applied to the ballast, a soft start is made when the lamp is turned on to reduce the burden on the electrode, thereby extending the life of the lamp. Output of a xenon lamp ballast It is an object to provide a control device.

In addition, an object of the present invention is to provide a device for controlling the output of a xenon lamp ballast capable of providing stable output and driving the lamp by maximally protecting the ballast even under poor environmental conditions in which the product is installed.

In addition, an object of the present invention is to provide an output control device for a xenon lamp ballast that can be installed in poor ambient conditions without causing an increase in manufacturing cost and can operate stably until the designed life.

In this embodiment for solving the above problems, in the apparatus for controlling the output of a ballast for lighting a xenon lamp, the ballast divides the discharge voltage of a single pulse applied at the time of initial lighting into multiple widths. By applying a pulse, the xenon lamp is turned on by soft start.

In addition, the ballast may be controlled to repeatedly output the applied voltage of the divided pulse multiple times when lighting is not turned on.

In addition, the ballast may include a sensor for detecting an internal temperature, and may be controlled to output a voltage inversely proportional to the internal temperature.

In addition, the ballast includes an AC rectifier for receiving and rectifying AC power, a power factor correction unit for correcting the power factor of the rectified power, a main power supply unit for providing the power factor corrected power as output power, and a DC for driving circuits in the main power unit. A circuit driving power supply unit for supplying power, a power factor control unit for controlling the power factor of rectified power, a lamp output driver outputting a voltage for driving the xenon lamp with power provided from the main power supply unit, and output control of the lamp output driver It may include a control unit that provides a signal, a temperature sensor unit that detects an internal temperature and provides temperature value data to the control unit, and a heat sink that dissipates internal heat to the outside.

The present invention is configured to divide and apply the initial lighting voltage applied from the ballast into a plurality of pulses, so that the burden on the discharge electrode can be reduced by soft-start lighting, so that it can be used until the initially designed life.

In addition, the present invention is configured to repeatedly and continuously apply the divided pulses a number of times in case of non-lighting, thereby reducing the burden on the discharge electrode and achieving stable lighting at the same time.

In addition, the present invention has the effect of extending the life of the ballast by adjusting the output voltage according to the internal temperature.

1 is a view showing the general configuration of a xenon lamp according to this embodiment;
2 is a block diagram showing a xenon lamp ballast according to this embodiment;
3 is a view showing a start pulse output from the ballast of this embodiment;
4 is a diagram showing a pulse of continuous lighting output from the ballast of this embodiment;

The technical problems achieved by the present invention and its practice will be clarified by the preferred embodiments described below. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It should be understood that the differences in the present embodiment, which will be described later, are not mutually exclusive. That is, without departing from the spirit and scope of the present invention, specific shapes, structures, and characteristics described may be implemented in relation to one embodiment in another embodiment, and the location of individual components within each disclosed embodiment. Alternatively, it should be understood that the arrangement may be changed, and similar reference numerals in the drawings indicate the same or similar functions across several aspects, and the shape, such as length, area and thickness, may be exaggerated for convenience.

1 is a view showing the general configuration of a xenon lamp according to this embodiment, Figure 2 is a block diagram showing a xenon lamp ballast according to this embodiment, Figure 3 is a view showing a start pulse output from the ballast of this embodiment And, Figure 4 is a view showing the continuous lighting pulse output from the ballast of this embodiment.

Referring to FIG. 1, the xenon lamp 20 of this embodiment is turned on by receiving an initial lighting voltage from the ballast 10 on one side. In this xenon lamp 20, a discharge tube 22 is installed inside the tube 21, and a socket part 26 for fastening to the main body (not shown) of the lighting device is coupled to the outside of the tube 21.

A pair of discharge electrodes 23 are inserted inside the discharge tube 22, and a pair of socket terminals 27 for electrical connection are provided on the outside of the socket part 26. In addition, high-pressure xenon gas is filled inside the discharge tube 22, the discharge electrode 23 is connected to a pair of electrode lines 24 penetrating the lamp base 25, and a pair of socket terminals 27 Power is supplied from the external ballast 10 through.

The xenon lamp 20 has a general lamp shape in appearance, and is configured to be electrically connected while being fastened to a plug of a main body of a lighting device such as a street light through a socket portion 26 . In addition, it is connected to the ballast 10 through a pair of socket terminals 27 and plug terminals 17 protruding outside of the socket unit 26 to receive power for driving and maintaining the lighting of the lamp.

In this embodiment, the ballast 10 minimizes damage to the electrode inside the discharge tube through continuous and repeated lighting including soft start when the lamp 20 is turned on, safely re-lights the heated lamp, and lights the lamp It is configured so that the output can be adjusted to the optimum condition according to the change in internal and external temperature even after With this configuration, the lifespan of the lamp and the ballast can be extended.

Looking at the configuration of the ballast 10 for this purpose with reference to FIG. 2, an AC rectifier 101 for receiving and rectifying AC power, a power factor correction unit 102 for correcting the power factor of the rectified power, and outputting the power factor corrected power. The main power supply unit 103 provided as power, the circuit driving power supply unit 104 supplying DC power for circuit driving to the main power supply unit, the power factor control unit 105 controlling the power factor of the rectified power, and the main power supply unit 103 A lamp output driver 110 for driving lamp output with supplied power, a control unit 107 for providing an output control signal of the lamp output driver 110, a temperature sensor unit 106 for detecting the internal temperature, and a ballast (10) A high-voltage coil unit 112 that converts DC voltage into high-voltage in the heat sink 111 and lamp output driver 110 that dissipates internal heat to the outside. And the high voltage coil unit 112 is connected to the xenon lamp 20 .

The ballast 10 configured as described above converts the input AC power into a DC voltage in the AC rectifier 101, and the AC voltage through the power factor correction driver 102 having a power factor correction circuit and the power factor control unit 105. Provides a stable DC voltage even with fluctuations in In addition, the DC voltage of about 400 volts generated by the main power supply unit 103 is applied to all components as a driving voltage of the ballast 10.

In addition, the lamp output driving unit 110 of the ballast 10 receives all signals required to control the output from the control unit 107 connected to the input terminal of the driving circuit to drive the lamp. In addition, the lamp output driving unit 110 provides an initial discharge voltage for lighting the lamp to turn on the lamp via the high voltage coil unit 112, and converts the driving voltage for normal operation after lighting the lamp to a predetermined amount of power. Provided in accordance to operate the xenon lamp (20). For example, when the rating of the electronic ballast is 150 watts, the ballast 10 operates with an output set from the beginning. At this time, the xenon lamp 20 is normally driven, and the ballast 10 continuously operates the lamp while maintaining a required output voltage.

In the ballast 10 in which these operations are performed, the role of the lamp output driver 110, which is a semiconductor device responsible for the central function of the inside, takes a large proportion. DC voltage of 400 volts, which is the main power source for driving the xenon lamp, is provided from the main power supply unit 103 through the drain terminal 108 and the source terminal 109 of the semiconductor element used in the lamp output driver 110, and the lamp output driver ( 110) transmits the provided voltage to the xenon lamp 20 so that it is turned on.

At this time, a lot of current flows in the semiconductor element of the lamp output driver 110 by the amount of power applied according to the capacity of the xenon lamp 20, which generates heat inside the semiconductor element. The lamp output driver 110 includes a heat sink 111 to dissipate heat, and the heat sink 111 is made of a metal material having excellent thermal conductivity such as aluminum.

Although the lamp output driver 110 of this embodiment uses the heat sink 111 to prevent thermal damage to the semiconductor element, the heat sink 111 has some limitations due to its size and volume, which is required by the semiconductor device. There are cases where the optimum operating temperature cannot be maintained. That is, the size and volume of the heat dissipation plate 111 should be considered in consideration of the maximum operating temperature range of the semiconductor device constituting the lamp output driver 110, which may increase manufacturing cost and thus reduce economic feasibility.

To this end, the ballast 10 of this embodiment further includes a temperature sensor unit 106, and sends a signal to the control unit 107 according to the temperature detected by the temperature sensor unit 106 to drive the lamp output (110). It is configured to control the pulse width and voltage of the circuit.

The ballast 10 having a temperature detection sensor unit 106 is a place with high ambient temperature and high humidity, for example, a place with high temperature and humidity due to poor ventilation in the tropics or a building where the temperature is always high, or where the ceiling is high. It can be operated with the designed life span even in a very poor temperature environment, such as when it is installed on the upper part of a place and has to operate in a high temperature environment. The temperature detection sensor unit 106 is connected to the driving circuit of the control unit 107 and sends normal value data to the control unit 107 when the ballast 10 operates within the normal range of the designed temperature value to the lamp output driving unit. (110) is designed to run with an initial output of 100%. In addition, when the ballast 10 operates in a high-temperature environment exceeding the designed temperature, the temperature sensor unit 106 sends data on the high temperature value to the control unit 107, and these signals are sent to the lamp output driver 110 It is designed to drive by controlling the voltage of the circuit and gradually reducing it from 100% output. At this time, the reduction ratio may be set to 5% to 50%. Therefore, when the ballast 10 is driven in a high temperature and harsh environment, the amount of current output from the circuit of the lamp output driver 110 can be reduced to reduce the burden on the semiconductor device and prevent damage to the ballast 10.

In particular, when the temperature inside and around the electronic ballast rises during operation, convulsive changes may occur in the parts used inside the ballast due to the high temperature, and this causes the operation of the ballast to become unstable. Entering, abnormal operation phenomena caused by changes in these circuits provide the cause of damage to the ballast. Therefore, the ballast of this embodiment maintains the temperature rise inside the electronic ballast at a certain level while continuously detecting the internal temperature during operation of the ballast and controlling the output, thereby preventing damage caused by heat and stably maintaining the function. .

In addition, the ballast of the present embodiment is configured such that a soft start is performed when the lamp is initially turned on, and the lifetime is stably maintained by minimizing damage to electrodes inside the discharge tube through continuous and repeated lighting.

That is, in the ballast of this embodiment, in order to maximize the lamp lighting characteristics of the xenon gas used together with argon gas, as shown in FIG. The pulse width T (301) is divided into a plurality of divided pulse widths T' (302) and provided. The output voltage of such a split pulse width T' (302) shortens the time applied to the discharge electrode 23 inside the discharge tube 22 at the time of initial discharge, thereby relieving the burden on the electrode at the time of lighting, and safe lighting. make it happen In particular, each pulse within each divided pulse width T' (302) is designed to sequentially increase in width, minimizing the burden on the electrode.

In addition, the ballast 10 of this embodiment is configured to continuously output voltage until lighting is achieved in the lamp output driver 110 when the lighting fails. That is, as shown in FIG. 4, the lamp output driver 110 continuously outputs a re-lighting signal having a divided pulse width T' (303) several times until the lighting is stably achieved when the initial lighting fails, so that the lighting is smoothly performed. make it happen For example, the re-lighting signal of the divided pulse width T′ 303 may be designed to be continuously output 5 to 6 times. Stable and reliable lighting can be provided from the xenon lamp 20 by dividing and continuously outputting the lighting pulse as described above, and the designed lifespan can be stably maintained.

Although exemplary embodiments of the present invention have been shown and described as described above, various modifications and other embodiments may be made by those skilled in the art. All of these modifications and other embodiments are to be considered and included in the appended claims without departing from the true spirit and scope of the present invention.

10 : Stabilizer
20: Xenon lamp
21: tube 22: discharge tube
23: discharge electrode 24: electrode line
26: socket part
101: AC rectifier 102: power factor correction drive unit
103: main power supply unit 104: circuit driving power supply unit
105: power factor control unit 106: temperature detection sensor unit
107: control unit 108: drain terminal
109: source terminal 110: lamp output driver
111: heat sink 112: high voltage coil unit

Claims (4)

A device for controlling the output of a ballast for lighting a xenon lamp,
The stabilizer,
The discharge voltage of a single pulse applied at the time of initial lighting is applied as divided pulses divided into a plurality of widths, and each pulse within each divided pulse width is sequentially applied so that the width increases, so that the xenon lamp is lit by soft start. An output regulating device of a xenon lamp ballast, configured to The method of claim 1, wherein the stabilizer,
An output control device of a xenon lamp ballast, which is controlled to continuously output the applied voltage of the divided pulse multiple times when the lighting is not turned on. The method of claim 1, wherein the stabilizer,
An output control device for a xenon lamp ballast having a sensor for detecting an internal temperature and controlled to output a voltage inversely proportional to the internal temperature. The method of claim 3, wherein the stabilizer,
AC rectifier for receiving and rectifying AC power;
A power factor correction unit for correcting the power factor of the rectified power;
a main power supply unit providing power factor corrected power as output power;
a circuit driving power supply unit supplying DC power for circuit driving to the main power supply unit;
a power factor control unit for controlling the power factor of the rectified power;
a lamp output driving unit outputting a voltage for driving the xenon lamp with power provided from the main power supply unit;
a control unit providing an output control signal of the lamp output driver;
a temperature sensor unit that detects an internal temperature and provides temperature value data to the control unit; and,
An output control device of a xenon lamp ballast including; a heat sink for dissipating internal heat to the outside.

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