KR20080097279A - Dimming ballast for hid lamps - Google Patents

Abstract

A dimming ballast for HID lamps automatically controls illuminance according to an external environment as a natrium lamp or a metal halide lamp by coupling a communication control unit with a ballast for HID lamps. A full-wave rectification and the filter unit(110) full-wave rectifies the AC voltage inputted from an EMI filter and converts the AC voltage into the DC voltage. An active power factor improving unit(120) is composed of an inductor, a diode, and an IC for the power factor improvement and a switching element. An output circuit unit is composed of a half bridge circuit consisting of the DC-link voltage which is the output of the power factor improving unit, and a driving IC driving two switch elements of the lamp connected to an LCC resonance circuit. A counter circuit unit(180) controls the initial igniting of the lamp and stops the operation of the driving IC if the fixed time is over.

Description

Illumination adjustable electronic ballast for high-pressure discharge lamps {DIMMING BALLAST FOR HID LAMPS}

1 is an overall block diagram of the present invention.

Fig. 2: Example of a realization circuit realizing the present invention

3: Example of inverter output driver, frequency variable circuit and lamp voltage and current detector circuit in ignition state

Fig. 4: Specific circuit example of lamp current detection

Fig. 5: Specific circuit example of lamp voltage detection

Fig. 6: Example of microcontroller peripheral circuit and PLM and sensor input circuit

7: Analog for frequency variation of driving IC by lamp voltage and current

     Switch utilization circuit example

8: Counter circuit example for monitoring the ignition state of the lamp

* Explanation of symbols for the main parts of the drawings

100: ballast of the present invention

110: EMI and full wave rectifier

120: active PFC

130: half bridge inverter

140: LCC resonant circuit

141: current detection and DC conversion unit of the lamp

150: voltage detection portion of the lamp

151: Lamp voltage detection and DC converter

160: microcontroller and peripheral circuit

161: microcontroller power supply (+ 5V)

170: analog switch and peripheral circuit example

180: counter and peripheral circuit example

190: Example of half-bridge driving IC and peripheral circuit

200: circuit example for frequency variation of the drive IC

210: power line modem

220: remote control / PC / various sensor control system

The present invention relates to a ballast for a high-pressure discharge lamp (hereinafter referred to as "HID lamp") to enable a stable use for high-power HID lamp, to increase the durability and reliability and to provide a practical as well as power line The present invention relates to a ballast for a high-pressure discharge lamp that enables communication or remote control and automatically controls the illumination adjustment of a HID lamp according to an external environment.

In general, HID lamp (High Intensity Discharge Lamp) is a lamp that induces luminescence by using spark discharge (plasma phenomenon) between electrodes without filament, unlike conventional halogen bulbs. It has been developed to improve the efficiency and color rendering of mercury lamps, and has a long-life, low heat load, high-efficiency characteristics, and stabilizers for stabilizing current flow and lighting HID lamps.

At this time, the ballast for the high-pressure discharge lamp can be largely classified into magnetic and electronic.

The magnetic ballast has been used to drive HID lamps to date, but it is difficult to install or handle due to its high power loss, bulkiness, and heavy weight. There is only one way to turn off some of the lamps, which is very inefficient.

The electronic ballast is a combination of a conventional power factor correction (PFC) circuit, which is a power factor correction circuit for an inverter function, and a half bridge, an output circuit, an active PFC circuit, a buck converter, and a full bridge. (Full Bridge) and active PFC circuit, buck converter and half-bridge coupling method is adopted.

However, in the case of the conventional HID electronic ballast, there is no illuminance control function and heat loss occurs in the active PFC circuit, which is a power factor correction circuit, resulting in a large loss. There was a problem that the durability and reliability is lowered, such as efficiency is lowered to 95% or less, which is pointed out a problem that is not practical.

In addition, conventionally, even in the electronic ballast, there is no technology for easily adjusting the illuminance of the HID lamp according to the external environment, and there is no need for the technique for the illumination control of the HID lamp for energy saving.

The present invention has been made in view of the above problems and the like, and its purpose is not only to stably use for high power HID lamps, but also to increase the durability and reliability, and to provide a high-voltage discharge for practical use. It is to provide an isostatic ballast.

In addition, illuminance control ballast for high-voltage discharge lamp to realize energy saving by connecting the high-voltage discharge ballast and the power line modem to control the illumination or to control and adjust the illumination of the HID lamp according to the external environment by using a remote control. To provide.

In order to achieve the above object, the sodium and metal halide lamp combined ballast of the present invention is the EMI filter unit 110 and the first inlet receiving AC power; Full-wave rectification and filter unit 110 for full-wave rectifying the AC voltage input from the EMI filter to a DC voltage;

An active power factor improving unit 120 including an inductor, a diode, a power factor improving IC, and a switching element;

The output of the active power factor correcting unit includes an output circuit unit 140 including a half bridge 130 circuit configured of a DC-link voltage and a driving IC driving two switch elements connected to an LCC resonant circuit;

A counter circuit unit 180 for controlling the initial ignition of the lamp and stopping the operation of the driving IC after a predetermined time elapses;

An analog switch circuit section 170 for using a delay circuit by RC time constant to reach a steady state in the igniter state;

An output current 141 and a voltage detector 151 for detecting and controlling the voltage and current of the lamp at all times;

A microcontroller controller 160 which detects the lamp voltage and the current and processes the lamp voltage and current into a microcontroller input signal;

In addition, the control signal transmitting unit 160 that transmits the illumination control signal received from the PLM and various sensors to the microcontroller.

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

)에 의해서 리플 섞인 DC-링크 전압(Vcc 311)을 만들어서 출력단에 공급하고, 능동 PFC용 IC(120) 및 L(T3)과 MosFET(M3)을 활용하여 승압시킨 DC-링크전압(Vcc 400)을 발생키는 회로(120)이다.2 is an electronic illuminance control ballast circuit diagram 100 of a sodium and metal halide lamp and a EMI filter 110, a full-wave rectifier circuit and a capacitor according to the present invention.

DC-link voltage (Vcc 311) ripple-mixed by the Is a circuit 120 that generates.

)과 커패시터(

)에 의해서 발진주파수가 가변된다. 또한 출력은 LCC 공진 회로(140)(

,

,

,

)를 형성하여 램프를 점화 시키고 정상 상태에 도달하게 된다.The DC-link voltage, which is the active PFC output, is used for the half bridge of FIG. The resistance applied to a predetermined terminal (pin # 7) of the driving IC 190 (

) And capacitor (

The oscillation frequency is varied by The output is also an LCC resonant circuit 140 (

,

,

,

) To ignite the lamp and reach the steady state.

(

)을 가변시키기 위해서 트랜지스터

과

을 이용하는데 점화상태에서는

가 OFF 되고

이 ON 되어서

=

가 되며 정상상태에서는

가 ON 되어

이 OFF 되므로

=

이 되어서 동작 주파수를 달리하도록 고안되었다.2 shows a resistor that is an oscillation frequency variable element of a half-bridge driver IC.

(

Transistor to vary

and

In the ignition state

Is off

Is turned ON

=

In normal condition

Is turned on

Is OFF

=

This is designed to change the operating frequency.

= 15Volt를 얻어서 카운터가 동작되도록 하여 일정한 시간 간격으로

이 ON이 되는 신호를 보내고 미리 설정된 상한치를 초과하면

가 ON되어서 카운터의 동작을 멈추고 점화동작 자체를 중단하도록 고안되었다. 그 리고 도 2에서 램프의 전압을 전류 변환기(141)로 하여

의 베이스에 공급하므로 램프전류가 정상 전류이면

가 ON되고

가 OFF이므로 카운터(180)와 아날로그스위치(160)가 동작하도록 되었으며 램프의 전류가 정상전류 전류 미만이면

가 OFF이고

가 ON되며 카운터 아날로그 스위치는 OFF된다. 도 2에서 램프 전압을 검출(151)하고 램프의 전류값을 마이크로컨트롤러의 입력으로 취하여 출력은 PWM 파형을 발생시키며 아날로그 스위치를 통하여 RC 저역통과 필터로 DC전압으로 만들어져서 전압제어 발진 구동 IC의 DC 입력으로 가해져서 하프브리지를 구동하는 주파수를 발생시킴으로 램프에 전류를 제어하여 결국 조도조절하게 된다. 또한 도 1에서는 전력선 모뎀(210) 및 각종 센서 회로에서(220)에서 얻은 신호를 마이크로컨트롤러(160)에 보내어 조도제어신호를 활용하고 주파수를 올리고 내리는 방법은 마이크로컨트롤러 입력 핀의 스위치(SW2, SW3)에 의해서 이루어진다.In the counter circuit of FIG. 2, the DC-link voltage (Vcc 311) is applied to pin 16 of the counter 180 at regular time intervals.

= 15 Volt to get the counter to operate at regular intervals

When this signal is turned ON and the preset upper limit value is exceeded

Is designed to stop the counter and stop the ignition itself. In FIG. 2, the voltage of the lamp is set as the current converter 141.

Is supplied to the base of the

Is ON

Is OFF, so the counter 180 and the analog switch 160 are operated. If the lamp current is less than the normal current,

Is OFF

Is turned on and the counter analog switch is turned off. In Figure 2, the lamp voltage is detected (151) and the current value of the lamp is taken as the input of the microcontroller, and the output generates a PWM waveform. The DC voltage of the voltage controlled oscillation driving IC is made by the RC low pass filter through the analog switch. It is applied to the input to generate a frequency that drives the half bridge, thereby controlling the current in the lamp and eventually adjusting the dimming. In addition, in FIG. 1, the signal obtained from the power line modem 210 and the various sensor circuits 220 is transmitted to the microcontroller 160 to utilize the illumination control signal and to raise and lower the frequency of the switch SW2 and SW3 of the microcontroller input pin. )

On the other hand, the present invention is to describe by adding a technology that can control the illumination of the HID lamp by combining a communication control means such as a high voltage discharge ballast or ballast for a high voltage discharge lamp and a power line modem according to the present invention as described above. do.

3 and 4, the illumination control technology for the high-pressure discharge lamp according to the embodiment of the present invention is connected to the ballast 100 for the high-pressure discharge lamp of the present invention described above, the power line modem connected to the central control PC 220 The signal obtained from (210) is transmitted to the lamp driving drive circuit of the ballast 100, and the state of the lamp is checked, and programming control is performed by time zone or according to external environmental conditions of light quantity or temperature, so that sodium or metal halide The microcontroller 160 for controlling the illuminance of the lamp and the microcontroller 160 and the central control PC 220 are enabled.

In this case, the ground fault detector 220 is connected to the power line PL to which the power line modem 210 is connected, and the ground fault detection signal is transmitted to the microcontroller 160, and the ballast 100 or the HID lamp is configured. The switch is configured to be OFF, but by providing the circuit breaker blocking function by providing the ground fault detection information, the energy saving and the protection of the ballast and the lamp are obtained.

In addition, the microcontroller 160 is configured to receive a signal from a variety of sensors, such as light sensors, temperature sensors and vehicle detection sensors for illumination control of the HID lamp according to the external environment.

According to the illuminance control system of the present invention as described above, it is possible to control to maintain 100% illuminance at a time when there are a lot of people or vehicle communication or a lot of work in the factory, and it is not necessary to have a high illuminance such as dawn or less communication. With or without, control can be made to maintain 50% illuminance.

In addition to controlling the illumination according to light quantity, temperature, and season, the vehicle or person can transmit the signal to the ballast in the direction of entry of the vehicle or person through a modem that can recognize the communication between the vehicle and the person. It can also be controlled to maintain 100% of the lamp illumination in the surrounding environment.

Therefore, it is possible to achieve energy savings of more than 30% compared to the conventional one by automatically controlling and adjusting the illumination of the sodium and metal halide lamps by the power line communication control means and various sensors.

On the other hand, the ballast and illuminance control system for a high-pressure discharge lamp according to the present invention has been described with reference to the specific embodiments and the accompanying drawings as described above, but can not be limited to this in particular, within the similar category for the technical idea of the present invention It will be apparent that various substitutions, modifications, and modifications can be made in the above, and this can be attributed to the present invention.

As described above, according to the ballast and illuminance control system for a high pressure discharge lamp according to the present invention, it is possible to increase durability and reliability, and in particular, to provide a high pressure discharge ballast for a sodium lamp and a metal halide lamp having practicality that can be practically applied. Can be.

In addition, the present invention by combining the ballast and communication control means for the high-pressure discharge lamp combined with sodium lamp and metal halide lamp can be automatically controlled by controlling the illumination of the combination of sodium lamp and metal halide lamp according to the external environment to save energy The effect can of course be provided with an illumination control system that allows for very efficient operation.

Claims (8)

In the configuration of the dimmable electronic ballast, which is a combination of a sodium lamp and a metal halide lamp, in the IC 100 generating the driving frequency of the half bridge 130, the IC may be changed by a DC voltage and is simply a peripheral resistance of the driving IC 190. (

) And capacitor (

Oscillation frequency can be varied by varying the value of; A circuit for distinguishing the initial ignition state from the normal state by using the counter circuit 180 and stopping the operation when the lamp cannot be turned on even after a predetermined time elapses; A system for converting a signal received from the counter 180 and the microcontroller 160 into a control signal using the analog switch 170; A circuit for supplying the voltage and current of the lamp using the LCC resonant circuit 140 and circuits 141 and 151 for detecting the voltage and current of the lamp using a transformer; A circuit having a function of detecting a voltage and a current of a lamp and inputting the value to a microcontroller to determine the lighting and steady state of the lamp; Ballast can stop the operation by the earth leakage detection function 220 and the illumination control by the power line modem 210 and the illumination control is possible by the external environment. In order to change the output frequency of the driver IC in claim 1, the IC peripheral resistor (

Two transistors to change the value

In normal operation with)

Is ON

To turn off the oscillation frequency control resistor.

In the initial state that only the lamp is used

Is off

Is ON, the oscillation frequency control resistor

The technique of changing the half-bridge driving frequency by the value of. The method of claim 2, in order to increase the half-bridge driving frequency in the initial ignition state.

The signal to turn ON the signal at the counter

To be; Also, the current detected by the lamp in the normal state

ON

Turn off the pull-up resistor

If the counter is reset by using the reset terminal of the counter and the lamp current is

Is off

When is turned on, the counter is operated and the drive IC generates the drive frequency up to a predetermined time, but if it is not ignited for a predetermined time due to a lamp failure, the counter is operated from the counter to stop the operation of the drive IC. To stop the operation of the counter itself.

And the circuit for stopping the operation of the counter by grounding the operation stop pin of the counter IC of the embodiment. The analog switch of claim 1 does not operate before the lamp is turned on as in the embodiment 170, but after the lamp is turned on by the DC supply power of the counter, the RC time constant circuit is repeated three times to vary the half bridge driving frequency. Signal for

By applying to the base of

ON

OFF to increase the oscillation frequency control resistance of the driver IC.

A circuit designed to lower the oscillation frequency by leaving only it; Using the current and voltage of the lamp as a microcontroller input, obtain a PWM signal for illuminance control from the microcontroller output, convert it to DC, operate an analog switch, and apply a half-bridge drive frequency to a DC input to a specified pin of the oscillation frequency drive IC. Means for controlling the power of the lamp by changing. In claim 1, the lamp current is detected by a small transformer, rectified to DC, and a part of the voltage is applied to the microcontroller input.

,

Method of controlling the illumination by calculating the power by the microcontroller internal program by using the detection (150) as a microcontroller input signal through the transformer (T1). The ballast 100 is connected to the ballast 100 for the high-pressure discharge lamp according to claim 1 or the electronic ballast for general high-pressure discharge lamp, the signal obtained from the power line modem 210 connected to the central control PC 220, the ballast (100) A microcontroller 160 for controlling the illuminance of the HID lamp by transmitting to the lamp driving drive circuit and checking the state of the lamp and performing programming control for each time zone or according to external environmental conditions such as light quantity or temperature; The power line modem (210) is connected to the power line (PL) is connected to the illumination control system for a high-pressure discharge lamp, characterized in that the maximum transmission when transmitting a signal from the microcontroller 160 to the central control PC (220). The method of claim 6, A ground fault detector 220 is connected to a power line PL to which the power line modem 210 is connected, and a ground fault detection signal is transmitted to the microcontroller 160, and the ballast 100 or the HID lamp is turned off. Illumination control system for a high-pressure discharge lamp, characterized in that the switch configuration. According to claim 1, a simple resistance (190) without modifying the circuit to drive a sodium lamp using a metal halide ballast or a metal halide lamp using a sodium lamp ballast.

The ballast which can be used simultaneously by converting the value with a switch.

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