KR100622311B1 - A self-diagnosis circuit of leakage transformer using discharge ramp - Google Patents

Abstract

According to the present invention, a transformer and a discharge lamp are connected in series between a first power supply terminal and a second power supply terminal, a thyristor and a second capacitor are connected in series between a tap of the transformer and a second power supply terminal, and a reverse thyristor is connected to the circuit. A ballast circuit in which diodes are connected in parallel, comprising: a third winding wound with a predetermined number of turns on a first annular core connected in series at a specific position between a first power supply stage and a transformer; A fourth winding wound with a predetermined number of turns on the first annular core; And a fifth resistor, a first light emitting diode, and a third diode connected in series with both ends of the fourth winding. Another embodiment of the present invention includes a transformer and a discharge lamp connected in series between a first power supply terminal and a second power supply terminal. In a ballast circuit in which a thyristor and a second capacitor are connected in series between a tap of a transformer and a second power supply terminal, a circuit in which a thyristor is connected and a reverse first diode are connected in parallel, a specific position between the first power supply terminal and the first capacitor. A fifth winding wound with a predetermined number of turns on a second annular core connected in series; A sixth winding wound with a predetermined number of turns on a second annular core; It includes a sixth resistor, a second light emitting diode, and a fourth diode connected in series at both ends of the sixth winding, and operates a discharge lamp safely through a stabilization circuit using a transformer and a light emitting diode for diagnosing a capacitor for power factor improvement. Maintenance cost is economical by accurately diagnosing the failure of capacitor and discharge lamp.

Description

A self-diagnosis circuit of leakage transformer using discharge ramp

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

Figure 2a shows a self-diagnosis circuit of the ballast for discharge lamps according to the present invention,

FIG. 2B is an excerpt of the first annular core connected to the self-diagnosis circuit of the ballast for discharge lamps according to the present invention illustrated in FIG. 2A;

Figure 3a shows a self-diagnosis circuit of the ballast for discharge lamps according to another embodiment of the present invention,

FIG. 3B is an excerpt of the second annular core connected to the self-diagnosis circuit of the ballast for discharge lamps according to the present invention illustrated in FIG.

4 is a front view of a ballast body according to the present invention.

* Description of the symbols for the main parts of the drawings *

100: lighting unit 200: self-diagnosis unit of the transformer

300: self-diagnostic portion R1 of capacitor: first resistance

400: ballast body 410: input and output lead portion

420: power display unit 430: self-diagnosis display LED of the ballast

L1: primary winding L2: secondary winding

TF: Transformer SCR: Thyristor

D1: first diode D2: second diode

TC1: first annular core TC2: second annular core

LED1: first light emitting diode LED2: second light emitting diode

C1: first capacitor C2: second capacitor

V1: first power stage V2: second power stage

The present invention relates to a ballast for a discharge lamp, and more particularly, a self-diagnosis circuit capable of stably operating a discharge lamp through a stabilization circuit using an annular core and a light emitting diode and diagnosing a failure of a ballast, a power factor improvement capacitor, and a discharge lamp. It is related with the ballast for discharge lamps containing.

Generally, high voltage sodium lamp generates 2500V ~ 3000V, metal halide lamp 800V ~ 2000V, and HQI lamp generates 3500V ~ 4500V high voltage pulse voltage every 16.67ms (or 8.33ms). It is well known that the components are roughly classified into high-pressure discharge lamps, ballasts and lighting circuits.

However, in the conventional case, when the installed streetlight fails, such as the failure of the installed streetlight, it is impossible to find the exact point of failure, and there is a discontinuity that replaces the entire ballast or discharge lamp of the expensive streetlight. Not only is this required, but there are also uneconomical defects that require high maintenance costs.

Figure 1 shows a ballast circuit for a discharge lamp according to the prior art, a street light connecting the power factor improving capacitor (C1) and the resistor (R1) in parallel with the power lines (VOL1, VOL2) of the AC input power (AC 220V) In the present invention, the high voltage pulse voltage required for lighting the discharge lamp is generated in the lighting device, and is composed of a ballast for stabilizing to a certain characteristic when the lighting lamp is turned on.

That is, the transformer and the discharge lamp are connected in series, and the igniter connects the capacitor C2 and the thyristor SCR in series with an arbitrary tap terminal of the primary winding L1 of the transformer, and the gate terminal G of the thyristor SCR. A circuit composed of the resistors R2, R3, and R4 and the diode D2 generates a trigger signal, and a circuit composed of the reverse diode D1 is connected in parallel with the thyristor SCR.

In the above, the AC input voltage (AC 220V) is applied through the power lines (VOL1, VOL2) so that the voltage through the P1 point is the moment when the polarity of the AC input power becomes + potential at P1 point and-potential at P2 point. The capacitor C2 is charged through the reverse diode D1, the capacitor C2, the primary winding L1 and the point P2 of the transformer.

Therefore, the voltage charged in the capacitor (C2) is combined with the AC input voltage (AC 220V) at the moment the polarities of the P1 and P2 points are changed so that twice the voltage is supplied to the anode terminal of the thyristor (SCR) and the resistor (R4). In addition, the trigger signal by the circuit composed of the diode D2 and the resistors R2 and R3 is applied to the gate terminal G of the thyristor SCR to trigger the thyristor SCR to be in a conductive state instantaneously. ) And the double voltage applied to the thyristor (SCR) anode terminal are discharged through the secondary winding (L2) of the transformer (TF), and as a result, the winding ratio (L1 :) of the primary winding and the secondary winding of the transformer (TF) The high voltage required to light the discharge lamp is supplied by L2), and the high voltage supplied at this time generates a high voltage pulse every 16.67ms with the time constant set by the capacitor C2 and the primary winding L1 of the transformer. Continue to supply until light is on At the same time that the copper thyristor (SCR) is the conduction operation.

In other words, when the AC input voltage (AC 220V) is supplied to the circuit, a high pressure pulse is generated from the light emitter, and when the discharge lamp is applied to the discharge lamp, the discharge lamp is ionized by the gas inside the discharge lamp. When the discharge lamp is turned on, the current flowing through the circuit is limited by the internal impedance of the discharge lamp and the inductance value of the transformer, and the voltage and current of the discharge lamp are stabilized to the required values during operation while the internal impedance of the discharge lamp is kept constant.

In this state, when the discharge lamp is turned on, a voltage drop occurs between P1 and P3 at both ends of the discharge lamp by the impedance of the discharge lamp and the inductance value (L) of the transformer. By dropping below the short-circuit voltage of the circuit composed of the capacitor C2 and the thyristor SCR, the voltage of the circuit generating the trigger pulse falls below the trigger voltage of the thyristor SCR, and thus the capacitor C2 and the thyristor SCR. The thyristor SCR of the circuit constituted by is turned off.

As described above, a circuit composed of a capacitor and a thyristor is generally a defective capacitor and a thyristor, but it is difficult to find the exact cause of the failure, so the inspector has a problem in that the discharge lamp is incorrectly replaced by a failure of the discharge lamp.

SUMMARY OF THE INVENTION An object of the present invention is to provide a self-check circuit for a discharge lamp ballast that can safely operate a discharge lamp through a stabilization circuit using an annular core and a light emitting diode, and can accurately diagnose a failure of a transformer, a power factor improving capacitor, and a discharge lamp. .

The technical means of the present invention for achieving the above object is that the transformer and the discharge lamp is connected in series between the first power supply terminal and the second power supply terminal, and the thyristor and the second capacitor are in series between the tap and the second power supply terminal of the transformer. In a ballast circuit in which a thyristor and a second capacitor are connected in series, and a ballast circuit in which a reverse first diode is connected in parallel, a predetermined number of turns are wound around a first annular core connected in series at a specific position between a first power supply terminal and a transformer. A third winding; A fourth winding wound with a predetermined number of turns on the first annular core; And a fifth resistor, a forward first light emitting diode, and a forward third diode D3 connected in series with both ends of the fourth winding.

Technical means of another embodiment of the present invention for achieving the above object, the transformer and the discharge lamp is connected in series between the first power supply and the second power supply and the thyristor and the second power supply between the tap and the second power supply terminal of the transformer. In a ballast circuit in which a capacitor is connected in series, a circuit in which a thyristor and a second capacitor are connected in series, and a reverse first diode is connected in series, a capacitor connected in series at a specific position P4 between the first power supply terminal and the first capacitor. A fifth winding L5 wound with a predetermined number of turns on the two annular cores; A sixth winding wound with a predetermined number of turns on the second annular core; And a sixth resistor, a second forward light emitting diode, and a fourth forward diode connected in series to both ends of the sixth winding.

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

FIG. 2A illustrates a self-diagnosis circuit of the ballast for discharge lamps according to the present invention, comprising a lighting unit 100 and a self-diagnosis unit 200, and FIG. 2B is a view of the ballast for discharge lamps according to the present invention illustrated in FIG. 2A. The first annular core connected to the self-diagnosis circuit is extracted and shown.

The transformer TF and the discharge lamp are connected in series between the first power supply terminal V1 and the second power supply terminal V2, and the second capacitor is connected between the tap Tap and the second power supply terminal V2 of the transformer TF. C2 and thyristor SCR are connected in series, and a fourth resistor R4, a second diode D2, and a third resistor R3 are connected between the output terminal of the transformer TF and the gate terminal of the thyristor SCR. The second resistor R2 is connected in series between the gate terminal of the thyristor SCR and the second power supply terminal V2, and is connected between the first power supply terminal V1 and the second power supply terminal V2 input terminal. The first capacitor C1 for power factor improvement is connected to the first capacitor C1, and the first resistor R1 is connected in parallel to the first capacitor C1.

In the present invention, the lighting unit 100 uses the thyristor (SCR), the first diode (D1) and the second diode (D2).

In addition, the self-diagnosis unit 200 is connected in series with a third power winding L3 having a predetermined number of turns wound around the first annular core TC1 at a specific stage P of the first power supply terminal V1 and the transformer TF. And a power supply terminal a and b power supply terminal (b) where voltage is induced at both ends of the fourth winding L4 wound around the first annular core TC1 by winding a predetermined number of turns. The fifth resistor R5, the forward first light emitting diode D1, and the forward third diode D3 are connected in series between the b power supply terminal b.

When an input voltage is applied to both ends of the first power terminal V1 and the second power terminal V2, the thyristor SCR is supplied to the thyristor SCR through the primary winding L1 and the second capacitor C2 of the transformer TF. At the same time, the second diode D2 becomes a short-circuit voltage by the time constant of the fourth resistor R4 through the primary winding L1 and the secondary winding L2 of the transformer TF, thereby triggering a trigger pulse. Is applied to the gate terminal of the thyristor (SCR) through the third resistor (R3).

At this time, the thyristor (SCR) is conducted by the voltage of the short-circuit state is applied to the gate to charge the second capacitor (C2). Whenever the potential of the thyristor SCR and the reverse first diode D1 is changed at a constant cycle, the thyristor SCR repeats the conduction and disconnection operation, and the voltage charged in the second capacitor C2 is discharged by the transformer TF. Thus, a high voltage pulse voltage is applied to both ends of the discharge lamp.

The high voltage pulse voltage applied here is generated every 16.67 ms (or 8.33 ms) at a constant cycle in which the potentials of the thyristor SCR and the forward first diode D1 are changed, and are continuously applied until the discharge lamp is turned on.

When the internal gas of the discharge lamp is ionized by the high-voltage pulse voltage generated as described above, the discharge lamp is turned on, and when the discharge lamp is turned on, the voltage and current of the discharge lamp are stabilized to the required values during operation while maintaining the constant internal impedance of the discharge lamp.

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 generated at both ends of the discharge lamp falls below the short-circuit voltage of the second diode D2, the second diode D2 is not triggered, the thyristor SCR is blocked, and the high voltage pulse is stopped.

Diagnosis of the transformer and the discharge lamp is performed between the first power source terminal V1 and the transformer TF by connecting a third winding L3 wound with a predetermined number of turns to the first annular core TC1 in series, and performing a first annular core TC1. The predetermined voltage of the high voltage pulse voltage generated from the transformer TF is induced at both ends of the fourth winding L4 wound around the predetermined number of turns, so that the fifth resistor R5, the first light emitting diode LED1 for self-diagnosis, and the third diode are This is achieved by visually confirming that a voltage flows in D3 to turn on the yellow light emitting diode LED, which is the first light emitting diode LED1.

For example, when the discharge lamp and the transformer are normal, the AC input voltage AC 220V flowing in the first voltage terminal V1 flows through the third winding L3 of the first annular core TC1 to the discharge lamp.

As a result, a predetermined voltage of the AC input voltage AC 220V flowing in the third winding L3 is induced in the fourth winding L4, and voltage a and voltage b of the fourth winding L4 are a A voltage flows through the fifth resistor R5 connected in series between stages (b), the first light emitting diode LED1 and the third diode D3 for self-diagnosis.

In this case, the AC input voltage AC 220V flowing through the third winding L3 is a low voltage, and thus the voltage induced in the fourth winding L4 is a predetermined voltage, so that the yellow light emitting diode LED1 is the first light emitting diode LED1. ) Goes out.

On the other hand, if the cause of the extinction of the discharge lamp is a failure of the transformer, when the AC input voltage (AC 220V) is applied from the first power supply terminal (V1), it must flow into the lighting unit 100 to generate a high voltage pulse voltage to turn on the discharge lamp. Due to the failure of the transformer TF, the discharge lamp is turned off and the high voltage pulse voltage is continuously charged in the second capacitor C2. The charged voltage is discharged to the third winding L3.

As a result, the high voltage pulse voltage charged in the second capacitor C2 is induced with a predetermined voltage to the fourth winding L4 of the first annular core TC1, so that a voltage terminal a of the fourth winding L4 is a. A yellow light emitting diode, which is a first light emitting diode LED1, is supplied with a voltage through a fifth resistor R5 connected in series between a and b voltage terminals b and a first light emitting diode LED1 and a third diode D3 for self-diagnosis. LED) lights up.

The self-diagnosis unit 200 is a case in which the ballast is broken when the first light emitting diode LED1 is turned on when power is supplied. Therefore, the first light emitting diode LED1 is turned off and the discharge lamp is not turned on even after the transformer is replaced. If not, the lighting unit 100 is a case of failure, so the lighting unit 100 may be replaced.

3A illustrates a self-diagnosis circuit of a ballast for a discharge lamp according to another embodiment, and includes a lighting unit 100 and a self-diagnosis unit 300, and FIG. 3B is a ballast for a discharge lamp according to the present invention illustrated in FIG. 3A. The second annular core connected to the magnetic circuit of Fig. 2 is extracted and shown.

The transformer TF and the discharge lamp are connected in series between the first power supply terminal V1 and the second power supply terminal V2, and the second capacitor is connected between the tap Tap and the second power supply terminal V2 of the transformer TF. C2 and thyristor SCR are connected in series, and a fourth resistor R4, a second diode D2, and a third resistor R3 are connected between the output terminal of the transformer TF and the gate terminal of the thyristor SCR. The second resistor R2 is connected in series between the gate terminal of the thyristor SCR and the second power supply terminal V2, and is connected between the first power supply terminal V1 and the second power supply terminal V2 input terminal. The first capacitor C1 for power factor improvement is connected, and the first resistor R1 is connected in parallel to the first capacitor C1.

Here, the power factor correction capacitor is installed to supply reactive power to the discharge lamp, and is shorted when the voltage is larger than the set value and is opened when the voltage is smaller, and the first resistor suppresses only the high current when a large current flows or an abnormal voltage occurs. Used to

In the present invention, the lighting unit 100 uses the thyristor (SCR), the first diode (D1) and the second diode (D2), the self-diagnostic unit 300 is the first power source (V1) and the second power source. The sixth winding L6 in which the first capacitor C1 and the second annular core TC2, which are power factor improvement capacitors, connected in series between the lines V2, are connected, and the predetermined number of turns are wound around the second annular core TC2. C power stage (c) and d power stage (d) where voltage is induced at both ends, and between the c power stage (c) and d power stage (d), the sixth resistor (L6) and the forward second light emission. The diode LED2 and the forward fourth diode D4 are connected in series.

When an AC input voltage AC 220V is applied to both ends of the first power supply terminal V1 and the second power supply terminal V2, the thyristor is formed through the primary winding L1 and the second capacitor C2 of the transformer TF. The second diode D2 is short-circuited by the time constant of the fourth resistor R4 through the primary winding L1 and the secondary winding L2 of the transformer TF while being supplied to the SCR. The voltage is applied to the gate terminal of the thyristor SCR through the third resistor R3.

At this time, the thyristor (SCR) is conducted by the voltage of the short-circuit state is applied to the gate to charge the second capacitor (C2). Whenever the potential of the thyristor SCR and the reverse first diode D1 is changed at a constant cycle, the thyristor SCR repeats the conduction and disconnection operation, and the voltage charged in the second capacitor C2 is discharged by the transformer TF. A high voltage pull voltage is applied to both ends of the discharge lamp.

The high voltage pulse voltage applied here is generated every 16.67 ms (or 8.33 ms) at a constant period during which the potentials of the thyristor SCR and the reverse first diode D1 are changed, and are continuously applied until the discharge lamp is turned on.

When the internal gas of the discharge lamp is ionized by the high-voltage pulse voltage generated as described above, when the discharge lamp is turned on and the discharge lamp is turned on, the internal impedance of the discharge lamp is maintained at a constant value while the voltage and current of the discharge lamp are stabilized to required values during operation. The lamp is turned on by the pulse voltage and the voltage drop occurs at both ends of the discharge lamp.

Since the voltage drop generated at both ends of the discharge lamp falls below the short-circuit voltage of the second diode D2, the second diode D2 is not triggered, the thyristor SCR is blocked, and the high voltage pulse is stopped.

The diagnosis of the power factor capacitor C1 and the discharge lamp includes the fifth winding L5 wound with a predetermined number of turns wound on the second annular core TC2 between the first power supply terminal V1 and the specific terminal P4 of the first capacitor. The voltage is induced across the sixth winding L6 having a predetermined number of turns wound on the second annular core TC2, and the sixth resistor R6, the second light emitting diode LED2 for self-diagnosis, and the fourth diode ( This is achieved by visually confirming that voltage flows to D4) and the red light emitting diode LED, which is the second light emitting diode LED2, is turned on.

For example, if the cause of the extinguishing of the discharge lamp is a failure of the power factor improving capacitor C1, the capacitor is opened and flows to the resistor R1 connected in parallel to the first capacitor C1, and the fifth winding L5 receives an AC input. The sixth resistor R6 connected to the voltage terminal c and the voltage terminal d in series of the sixth winding L6 is induced in the sixth winding L6 by a predetermined voltage of the voltage AC 220V. And a minute voltage flows to the second light emitting diode LED2 and the fourth diode D4 for self-diagnosis, and the red light emitting diode LED, which is the second light emitting diode LED2, is turned off.

On the other hand, if the power factor improving capacitor C1 is normal, when an AC input voltage is applied from the first power supply terminal V1, the first capacitor C1 reduces the line current and a voltage drop occurs at both ends. At this point, as the potential changes, the voltage changes discontinuously, a high current flows to generate a high voltage, and the generated voltage is charged to the capacitor C1 and discharged to the fifth winding L5.

As a result, the voltage charged in the first condenser C1 is induced with a predetermined voltage to the sixth winding L6 of the second annular core TC2, so that the c voltage terminals c and d of the sixth winding L6 are d. A voltage flows through the sixth resistor R6 connected in series between the voltage d, the second light emitting diode LED2 and the fourth diode D4 for self-diagnosis to turn on the red light emitting diode LED as the second light emitting diode.

4 is a front view of the main body 400 of the ballast according to the present invention, an input / output lead line unit 410 for connecting to a specific measuring instrument, a power display light emitting diode 420 indicating whether power is supplied, and a light emitting diode indicating whether a ballast is broken (430), the first light emitting diode (LED1) for diagnosing transformer failure and the second light emitting diode (LED2) for diagnosing power factor correction capacitor (LED2) are installed in the ballast body (400) to light each of the diagnostic light emitting diodes of the ballast body when the discharge lamp is off. By visually confirming, the cause of the discharging of the discharge lamp can be known.

For example, if the yellow light emitting diode (LED), which is the first light emitting diode, is turned on when the discharge lamp is turned off, the transformer is malfunctioning, and if the red light emitting diode (LED), which is the second light emitting diode, is turned off, the power factor improving capacitor is 1 The capacitor is broken.

On the other hand, when the discharge lamp is normally lit, the yellow light emitting diode LED which is the first light emitting diode of the ballast body is turned off, and the red light emitting diode LED which is the second light emitting diode is lit.

The present invention is not limited to the above-described embodiments, and various changes can be made by those skilled in the art without departing from the gist of the present invention as claimed in the following claims.

As described in detail above, the present invention operates the discharge lamp more safely through a stabilization circuit using a light emitting diode and a thyristor for diagnosing the transformer and the power factor improving capacitor, and accurately diagnoses the failure of the transformer and the power factor improving capacitor and the discharge lamp. By accurately identifying and displaying the abnormality of the discharge lamp of the street lamp and the transformer or the power factor improving capacitor, 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 (4)

A transformer and a discharge lamp are connected in series between the first power supply terminal and the second power supply terminal, and a thyristor and a second capacitor are connected in series between the tap of the first winding L1 of the transformer and the second power supply terminal. A ballast circuit in which a thyristor and a second capacitor are connected in series and a reverse first diode is connected in parallel, A predetermined number of turns are wound around the first annular core TC1 connected in series at a specific position between the first power supply terminal V1 and the specific terminal P of the first primary winding L1 of the transformer TF. Third winding L3; A fourth primary winding L4 wound around the first annular core TC1 by a predetermined number of turns; And And a fifth resistor (R5) connected in series with both ends of the fourth winding, and a forward first light emitting diode (LED1) and a forward third diode (D3). The self-diagnosis circuit of the ballast for discharge lamps, The third winding L3 wound a predetermined number of turns on the first annular core TC1 between the first power supply terminal V1 and a specific terminal P of the first winding L1 of the transformer TF. ) Is connected in series, and the fifth resistor R5 and the forward first light emitting diode LED1 and the forward direction are connected between both ends of the fourth winding L4 wound with a predetermined number of turns on the first annular core TC1. A self-diagnosis circuit for a ballast for discharge lamps, characterized in that the third diode (D3) is connected in series to diagnose a transformer and a discharge lamp. A transformer and a discharge lamp are connected in series between the first power supply terminal and the second power supply terminal, and a thyristor and a second capacitor are connected in series between the tap of the first winding L1 of the transformer and the second power supply terminal. A ballast circuit in which a thyristor and a second capacitor are connected in series and a reverse first diode is connected in parallel, A fifth winding (L5) wound with a predetermined number of turns on the second annular core (TC2) connected in series between the first power supply terminal (V1) and the specific stage (P4) of the first capacitor (C1); A sixth winding L6 wound around the second annular core TC2 by a predetermined number of turns; And And a sixth resistor (R6), a forward second light emitting diode (LED2), and a forward fourth diode (D4) connected in series with both ends of the sixth winding. The self-diagnosis circuit of the ballast for discharge lamps, The fifth power winding wound in a predetermined number of turns on the second annular core TC2 is connected in series to the first power supply terminal V1 and a specific stage P4 of the first capacitor C1, and the second annular core is connected in series. The sixth winding L6 and the forward second light emitting diode LED2 and the forward fourth diode D4 are connected in series between both ends of the sixth winding L6 wound with a predetermined number of turns on (TC2). And diagnosing the primary capacitor (C1) and the discharge lamp.

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