KR100447796B1 - A Self-Diagnois Gradual Rise Circuit For Discharge Lamp - Google Patents

Abstract

A ballast circuit in which choke coils and discharge lamps are connected in series between a first power supply terminal and a second power supply terminal, comprising: a second capacitor and a triac connected in series between a tap of the choke coil and a second power supply terminal; A second resistor and a third capacitor connected in series between an output terminal of the choke coil and a second power supply terminal; A die solution and a third resistor connected in series between the common contact of the second resistor and the third capacitor and the gate terminal of the triac; A fourth resistor connected in parallel to said third capacitor; And a fifth resistor connected between the gate end of the triac and a second power supply end; A power-supply monitoring reverse first light emitting diode connected in series between the first power supply terminal and the second power supply terminal; And a forward second light emitting diode for monitoring a ballast and a lamp between the common contact point of the second capacitor and the triac and a second power supply terminal to operate the discharge lamp more safely and to check whether the power monitoring and the ballast and the lamp have failed. By accurately monitoring, it is possible to identify and display the abnormality of the discharge lamp and ballast or power supply of the street lamp more efficiently to perform the maintenance of the street lamp more efficiently, and to check the abnormal part accurately according to the operation status of the light emitting diode. It provides self-diagnosis lighting circuit of ballasts for discharge lamps that can check, replace or repair only the failure parts without performing unnecessary parts replacement work.

Description

A Self-Diagnois Gradual Rise Circuit For Discharge Lamp}

The present invention relates to a ballast for a discharge lamp, and in particular, a self-diagnosis lighting circuit of a ballast for a discharge lamp capable of safely operating a discharge lamp through a plurality of light emitting diodes and stabilization circuits and monitoring power failure, ballast and lamp failure. It's about.

In general, in the street lamp using a high-pressure discharge lamp, such as sodium or metal halide lamp, it is well known that the components are divided into high-pressure discharge lamp, ballast and lighting circuit.

However, in the conventional case, when a failure occurs such as when the installed street light does not turn on, the cause of the exact failure cannot be found, and there is a closed stage in which the entire ballast or discharge lamp of the expensive street light is replaced. Not only was it necessary for labor and labor, but there were also uneconomical defects that required high maintenance costs.

Fig. 1 shows a ballast circuit for a discharge lamp according to the prior art, and is composed of a choke coil CC, a trigger signal generation circuit 1, a discharge lamp circuit 3 and a display circuit section 5.

In other words, in the street light in which the choke coil CC and the discharge lamp are connected in series with the power lines Ln1 and Ln2 of the AC input power source AC 220V, and the power factor improving capacitor C2 is connected in parallel with the discharge lamp, the choke The capacitor C1 and the thyristor SCR are connected in series to an arbitrary tap terminal of the primary winding L1 of the coil CC, and the resistor R1 and the diode D1 are connected to the gate terminal G of the thyristor SCR. And a display lamp (LED), a resistor (R4) and a forward diode (D2) at the same time as the connection and connection of the discharge lighting lamp (3) having the trigger signal generation circuit (1) consisting of resistors (R2, R3). The circuit part 5 was connected in parallel, but the display lamp LED was connected to the anode terminal of the thyristor SCR through the resistor R4.

In the above, the AC input power (AC 220V) is applied through the power lines (Ln1, Ln2) so that the polarity of the AC input power (AC 220V) becomes + potential at ⓐ point and-potential at ⓑ point at ⓐ point. The voltage through is charged into the capacitor C1 through the forward diode D2, the capacitor C1, the primary winding L1 and the point ⓑ of the choke coil CC.

Therefore, the voltage charged in the capacitor C1 is combined with the AC input voltage (AC 220V) at the moment the polarity of the points ⓐ and ⓑ changes, so that twice the voltage (220V × √2 × 2) is the thyristor of the lighting circuit 3. The trigger signal generated by the trigger pulse generating circuit 1 composed of the resistor R1, the diode D1, and the resistors R2, R3 is supplied to the anode terminal of the SCR and the gate terminal G of the thyristor SCR. The thyristor (SCR) is triggered to turn on momentarily, and the double voltage applied to the capacitor (C1) and thyristor (SCR) anode terminals is passed through the secondary winding (L2) of the choke coil (CC). As a result, the high voltage required for lighting the discharge lamp is supplied by the winding ratio L1: L2 of the primary winding L1 and the secondary winding L2 of the choke coil CC, and the high pressure supplied is High voltage pulse every 16.67ms with time constant set by capacitor C1, resistor R4 and primary winding L1 of choke coil CC It is generated and continues to be supplied until the discharge lamp is turned on to perform the lighting operation of the discharge lamp, and at the same time, the display lamp LED of the display circuit 5 also has a voltage due to the ON operation of the thyristor SCR of the discharge lamp lighting circuit 3. It shows the state of supply and lighting.

In this state, when the discharge lamp is turned on, a voltage drop occurs at both ends of the discharge lamp by the impedance of the discharge lamp and the inductance value (L) of the choke coil (CC). By dropping below the breakover voltage of the discharge lamp 3, the voltage of the trigger pulse generating circuit 1 falls below the trigger voltage of the thyristor SCR, so that the thyristor SCR of the discharge lamp 3 is turned off. In this state, the display lamp LED of the display circuit 5 is turned off to display a normal point / off state of the discharge lamp.

In the conventional ballast circuit configured as described above, when a failure occurs in the ballast due to a defect of the capacitor C1 provided in the discharge lamp, the light emitting diode for indicating should be automatically turned off, but the light emitting diode is not turned off. Most of the defects of the discharge lighting circuit are the defects of the capacitor or the thyristor, but it is difficult to find the exact cause of failure because the LED is not turned off.

Therefore, in case of failure of the discharge lamp, the indicator light-emitting diode does not turn off but keeps on lighting.In the circuit, the + potential is supplied to the anode side of the thyristor through the choke coil, the light-emitting diode, and the resistor. The thyristor is turned on, and the light emitting diode is normally operated. However, the high voltage pulse voltage does not occur due to the failure of the capacitor, and the discharge lamp cannot be turned on, and the inspector also has a problem in that the discharge lamp is incorrectly replaced due to a failure of the discharge lamp because the light emitting diode is turned on.

Accordingly, an object of the present invention is to provide a self-diagnosis lighting circuit of a ballast for a discharge lamp that can safely operate a discharge lamp through a plurality of light emitting diodes and stabilization circuits, and can accurately monitor power supply, ballast and lamp failure. There is.

It is another object of the present invention to operate a discharge lamp more safely through a plurality of light emitting diodes for power monitoring, ballast, and lamp monitoring, and a stabilization circuit using a triac and a diac, and to accurately determine whether the power monitoring, ballast, and lamp are broken. The present invention provides a self-diagnosis lighting circuit of a ballast for discharge lamps that can be monitored.

1 is a circuit diagram showing a ballast for a street lamp discharge lamp according to the prior art,

2 is a circuit diagram showing a ballast for a street lamp discharge lamp according to the present invention,

3 is a circuit diagram showing a self-diagnostic ballast according to another embodiment of the present invention.

* Explanation of symbols for main parts of the drawing

10: high pressure pulse generator 20: self-diagnostic display

CC: Choke Coil TA: TRIAC

DA: DIAC LED1: First Light Emitting Diode

LED2: second light emitting diode

Technical means of the present invention for achieving the above object is a ballast circuit in which choke coils and discharge lamps are connected in series between a first power supply stage and a second power supply stage: a series between a tap of the choke coil and a second power supply stage. A second condenser and a triac connected to each other; A second resistor and a third capacitor connected in series between an output terminal of the choke coil and a second power supply terminal; A die solution and a third resistor connected in series between the common contact of the second resistor and the third capacitor and the gate terminal of the triac; A fourth resistor connected in parallel to said third capacitor; And a fifth resistor connected between the gate end of the triac and a second power supply end; A power-supply monitoring reverse first light emitting diode connected in series between the first power supply terminal and the second power supply terminal; And a forward second light emitting diode for monitoring a ballast and a lamp between a common contact point of the second capacitor and the triac and a second power supply terminal.

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

2 shows a ballast circuit according to the present invention, and FIG. 3 shows a ballast circuit for self-diagnosis according to the present invention. The ballast circuit includes a high voltage pulse generator 10 and a self-diagnosis display unit 20. .

A choke coil CC and a discharge lamp are connected in series between the first power supply terminal ⓐ and the second power supply terminal ⓑ, and between the tab of the choke coil CC and the second power supply terminal ⓑ. The second capacitor C2 and the triac TA are connected in series, and the second resistor R2 and the third capacitor C3 are connected between the output terminal of the choke coil CC and the second power supply terminal ⓑ. The die solution DA and the third resistor R3 are connected in series and between the common contact Nd1 of the second resistor R2 and the third capacitor C3 and the gate terminal G of the triac TA. ) Is connected in series, a fourth resistor R4 is connected in parallel to the third capacitor C3, and is connected between the gate terminal G and the second power supply terminal ⓑ of the triac TA. The fifth resistor R5 is connected.

In addition, a first capacitor C1 for improving power factor is connected between the first power terminal ⓐ and the second power terminal ⓑ input terminal, and a first resistor R1 is parallel to the first capacitor C1. Connected.

As described above, in the present invention, the high-pressure pulse generating unit 10 is configured by using the triac (TA) and the die solution (DA). In FIG. 1, the thyristor (SCR) and the diodes (D1, D2) are used.

In addition, the self-diagnosis display unit 20 is composed of a display means for monitoring the power, and a display means for monitoring the ballast and discharge lamp, the power supply monitoring between the second power source (ⓑ) and the first power source (ⓐ). The forward first diode D1, the forward first light emitting diode LED1, and the sixth resistor R6 are connected in series, and the second capacitor C2 and the triac TA are used for monitoring the ballast and the discharge lamp. The forward second diode D2, the forward second light emitting diode LED2, and the seventh resistor R7 are connected in series between the common contact Nd2 and the second power supply terminal ⓑ.

That is, when the input voltage AC 220V is applied to both ends of the first power supply terminal ⓐ and the second power supply terminal ⓑ in FIGS. 2 and 3, the first coil L1 and the first coil L1 of the choke coil CC are formed. The second resistor R2 is supplied to the second terminal T2 of the triac TA through the second capacitor C2 and through the first coil L1 and the second coil L2 of the choke coil CC. And the time constant of the third capacitor C3 and the fourth resistor R4, the die solution DA becomes a breakover voltage, and the trigger pulse is transmitted to the gate G of the triac TA through the third resistor R3. ) Is added.

At this time, since the triac TA is turned on by the breakover voltage applied to the gate G, the second capacitor C2 is charged. Whenever the potential of the second terminal T2 and the first terminal T1 of the triac TA changes to a predetermined period (8.33 ms), the triac TA repeats the turn-on and turn-off operations. The voltage charged in the capacitor C2 is discharged to the second coil L2 of the choke coil CC.

As a result, a high voltage pulse voltage is applied to both ends of the discharge lamp.

Here, the applied high voltage pulse voltage is generated every 8.33 ㎳ (1/120 sec) and continues to be applied until the discharge lamp is turned on.

The internal gas of the discharge lamp is ionized by the high-voltage pulse voltage generated as described above, and the discharge lamp is turned on. When the discharge lamp is turned on, the voltage and current of the discharge lamp are necessary during operation while the internal impedance of the discharge lamp is maintained at a constant low value. It is stabilized by value.

Therefore, the discharge lamp is turned on by the high voltage pulse voltage and the voltage drop occurs at both ends of the discharge lamp.

Since the voltage drop across the discharge lamp is lowered below the breakover voltage of the die solution DA, the die solution DA is not triggered and the triac TA is turned off. do.

Here, the high pressure pulse is necessary only when starting the discharge lamp.

That is, before the discharge lamp is turned on, the high voltage pulse is continuously generated every 8.33 ms, but once the discharge lamp is turned on, the high voltage pulse is automatically stopped.

In addition, power monitoring of the self-diagnosis display unit 20 includes a sixth resistor R6 and a power monitoring first light emitting diode (LED1; green LED) at both ends of the first power supply terminal (ⓐ) and the second power supply terminal (ⓑ). When the AC 220V voltage is applied between the first power supply terminal ⓐ and the second power supply terminal ⓑ by connecting the first diode D1, the first light emitting diode LED1 is turned on.

That is, when the power is supplied, the green LED which is the first light emitting diode LED1 is turned on, and when the power is cut off, the green LED is turned off, so that the power supply can be visually checked.

The ballast and discharge lamp monitoring is performed by connecting the second diode D2, the second light emitting diode LED2 (red LED), and the seventh resistor R7 to both ends of the triac TA. When operating in the off direction, the voltage charged in the second capacitor C2 turns on the second light emitting diode LED2 through the second diode D2, and when the triac TA is turned on, the second light emitting diode ( LED2) is turned off.

Here, when the discharge lamp is turned on, the triac TA is turned off because the voltage applied to the trigger die liquid DA does not reach the breakover voltage. At this time, since the second capacitor C2 is not charged, the second diode D2 is not charged. Both ends of the second light emitting diode (LED2) through) is close to the 'zero' voltage (OV), the red LED, which is the second light emitting diode (LED2) is kept off.

In other words, in the self-diagnosis identification method, if the second light emitting diode (LED2) is turned off at the time of power supply, the ballast is broken. Therefore, the ballast may be replaced. The second light emitting diode (LED2) is lit even after the power supply. If the discharge lamp does not light up, the ballast is not broken, but the discharge lamp is broken. Replace the discharge lamp.

While specific embodiments of the present invention have been described and illustrated above, it will be apparent that the present invention may be embodied in various modifications by those skilled in the art. Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, but should fall within the claims appended to the present invention.

Therefore, in the present invention, a plurality of light emitting diodes for power supply monitoring, ballast and lamp monitoring, and a stabilization circuit using a triac and a diac are used to operate the discharge lamp more safely and to accurately monitor whether the power monitoring, ballast, and lamp have failed. By accurately identifying and displaying the abnormality of the discharge lamp, ballast or power supply of the street lamp, the maintenance of the street lamp can be performed more efficiently, and the unnecessary parts can be accurately checked according to the operation state of the light emitting diode. It is possible to check, replace or repair only the failure site without performing the replacement work, so there is an advantage that the maintenance of the street lamp can be performed very economically.

Claims (2)

In a ballast circuit in which a choke coil CC and a discharge lamp are connected in series between a first power source ⓐ and a second power source ⓑ: A second capacitor C2 and a triac TA connected in series between the tab of the choke coil CC and the second power supply terminal ⓑ; A second resistor (R2) and a third capacitor (C3) connected in series between the output terminal of the choke coil (CC) and the second power supply terminal (ⓑ); A die solution DA and a third resistor R3 connected in series between the common contact Nd1 of the second resistor R2 and the third capacitor C3 and the gate terminal G of the triac TA; A reverse first light emitting diode (LED1) connected in series between the first power source (ⓐ) and the second power source (ⓑ); And a forward second light emitting diode (LED2) between the common contact (Nd2) of the second capacitor (C2) and the triac (TA) and the second power supply terminal (ⓑ). Self-diagnosis lighting circuit. The method according to claim 1, The ballast circuit is connected between the reverse first diode D1, the reverse first light emitting diode LED1 and the sixth resistor R6 in series between the first power source ⓐ and the second power source ⓑ. The power supply is monitored, and a forward second diode D2 and a forward second light emitting diode LED2 are disposed between the common contact point Nd2 of the second capacitor C2 and the triac TA and the second power supply terminal ⓑ. And a seventh resistor (R7) connected in series to monitor the ballast and the discharge lamp.