JPH0589991A - Discharge lamp lighting device - Google Patents

Abstract

PURPOSE:To provide a discharge lamp lighting device capable of extending the life of a high pressure discharge lamp and reducing labor concerning maintenance work as for replacement. CONSTITUTION:When AC power supply 10 is turned on, alternating voltage is applied to high pressure discharge tubes 2, 3 via stabilizers 11, 12. Each time the AC power supply 10 is turned on, a pulse voltage of the positive level is emitted from a pulse generator 13. The pulse voltage is superimposed on the positive half-cycle waveform of alternating voltage and is applied to the high pressure discharge lamps 2, 3 in sequence each time the AC power supply 10 is turned on. Thereby the high pressure discharge lamps 2, 3 are alternately started and lighted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp lighting device for lighting a high pressure discharge lamp.

[0002]

2. Description of the Related Art As lighting equipment used for road lighting and tunnel lighting, there are high-pressure discharge lamps such as high-pressure sodium lamps and metal halide lamps. This high-pressure discharge lamp has the same life as a general incandescent light bulb, and requires regular or necessary replacement work.

[0003]

However, the high-pressure discharge lamp is often installed outdoors and at a high place, and in reality, a great deal of labor is required for maintenance such as replacement. This invention takes the above circumstances into consideration,

In the discharge lamp lighting device according to any one of claims 1 to 6, it is possible to extend the life of the high pressure discharge lamp, thereby reducing the labor required for maintenance such as replacement. ..

[0005]

According to another aspect of the present invention, there are provided a plurality of high pressure discharge lamps which are started by receiving a pulse voltage, and a plurality of high pressure discharge lamps which are respectively inserted and connected between the discharge lamps and a power source. Ballasts, pulse generating means connected to these ballasts to generate a pulse voltage for starting when energized, control means for sequentially connecting the pulse generating means to each ballast each time the power is turned on, and the power source is Control means for connecting the pulse generating means to each of the ballasts successively when turned on, and means for selecting execution of these control means.

A discharge lamp lighting device according to a second aspect of the present invention includes a plurality of high-pressure discharge lamps, a plurality of ballasts inserted and connected between the discharge lamps and a power source via switches, and the above switches. A control means that is turned on each time the power is turned on,
Control means for successively turning on the respective switches when the power is turned on and means for selecting execution of these control means are provided.

According to another aspect of the discharge lamp lighting device of the present invention, one high pressure discharge lamp which has a pair of starting auxiliary conductors having polarities different from each other and is started by receiving a pulse voltage is inserted between the discharge lamp and a power source. A ballast connected to the ballast; pulse generating means connected to the ballast to generate a pulse voltage for starting when energized; and control means for switching the polarity of the pulse voltage generated from the pulse generating means every time the power is turned on. Prepare

A discharge lamp lighting device according to a fourth aspect of the present invention includes a plurality of high-pressure discharge lamps each having a starting auxiliary conductor and started by receiving a pulse voltage, and a stable insertion inserted between the discharge lamp and a power source. And a pulse generator that is connected to the ballast and emits a pulse voltage for starting when energized, and a controller that sequentially connects the starting auxiliary conductors each time the power is turned on.

A discharge lamp lighting device according to a fifth aspect of the present invention is provided with the first and second aspects.
The discharge lamp lighting device according to claim 3 or 4, wherein the pulse generating means has a phase of the power supply voltage of 60 degrees to 1 degree.
It emits a pulse voltage during a period of 20 degrees or 240 to 300 degrees.

The discharge lamp lighting device according to claim 6 is the discharge lamp lighting device according to claim 1, claim 3, or claim 4, wherein the pulse generating means has a level of 2000 V or more and a width of 90% of the level. Generates a pulse voltage of 3 μsec.

[0011]

In the discharge lamp lighting device according to the first aspect of the present invention, the plurality of high pressure discharge lamps are sequentially turned on each time the power is turned on, or the plurality of high pressure discharge lamps are turned on at the same time. In the discharge lamp lighting device according to the second aspect, the plurality of high pressure discharge lamps are sequentially turned on each time the power is turned on, or the plurality of high pressure discharge lamps are turned on at the same time. In the discharge lamp lighting device of the third aspect, the starting pulse voltage is alternately applied to both electrodes of one high-pressure discharge lamp each time the power is turned on. In the discharge lamp lighting device according to the fourth aspect, the plurality of high pressure discharge lamps are sequentially turned on each time the power is turned on. In the discharge lamp lighting device according to the fifth aspect, the starting pulse voltage is superimposed on a portion where the power supply voltage has a high positive level or a negative level. Claim 6
In the discharge lamp lighting device of, the level is 2000V for starting.
As described above, the pulse voltage of 3 μsec is generated at the position where the width is 90% of the level.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. The first embodiment corresponds to the discharge lamp lighting device of claim 1.

As shown in FIG. 1, two high pressure discharge lamps 2,
There are three. Each of these high-pressure discharge lamps is connected to an AC power supply 10, and ballasts 11 and 12 are inserted and connected between the respective connections. The high-pressure discharge lamp 2 has electrodes 2a and 2b, and when an alternating voltage is applied between both electrodes, a pulse voltage is further applied to the high-pressure discharge lamp 2 so that the high-pressure discharge lamp 2 starts and lights.
The high-pressure discharge lamp 3 has electrodes 3a and 3b and is started and lit by further application of a pulse voltage in a state where an AC voltage is applied between the electrodes.

A pulse generator 13 is connected to the power supply 10 via the ballasts 11 and 12 and an output switch 15 of a control circuit 14 described later. This pulse generator 13
When energized, a pulse voltage for starting is emitted. A control circuit 14 is connected to the power supply 10, and an operation switch 16 is connected to the control circuit 14.

The control circuit 14 uses a bidirectional contact of a relay as the output switch 15. Also, the control circuit 1
4 is a functional means for controlling the output switch 15 so that the pulse generator 13 is sequentially connected to the ballasts 11 and 12 each time the power source 10 is turned on; 12 is provided with functional means for controlling the output switch 15 so as to be sequentially connected, and functional means for selecting execution of these two controls according to the state of the operation switch 16. The operation will be described. Now, assume that the operation switch 16 is turned off.

When the power supply 10 is turned on, an AC voltage is applied to the high pressure discharge lamps 2 and 3 via the ballasts 11 and 12.
At this time, one contact of the changeover switch 15 is turned on, the pulse generator 13 operates, and a pulse voltage is generated.

As shown by the waveform P in FIG. 2, this pulse voltage is generated in the period in which the phase of the power supply voltage V is 60 to 120 degrees, and the positive AC voltage applied from the ballast 11 to the high pressure discharge lamp 2 is generated. It is superimposed on the half cycle waveform. This allows
The high pressure discharge lamp 2 starts and lights up. After that, when the power supply 10 is cut off, the high pressure discharge lamp 2 is turned off.

Next, when the power supply 10 is turned on, the output switch 15 switches the other contact to ON. In this case, the pulse voltage generated from the pulse generator 13 is
It is superimposed on the positive half cycle waveform of the AC voltage applied to the high pressure discharge lamp 3 from 2. As a result, the high pressure discharge lamp 3 starts and lights up.

By alternately lighting the two high-pressure discharge lamps 2 and 3 in this way, the life of the high-pressure discharge lamps 2 and 3 can be extended to double the conventional usage period, and the labor required for maintenance is greatly reduced. It On the other hand, it is assumed that the operation switch 16 is off.

When the power supply 10 is turned on, an AC voltage is applied to the high pressure discharge lamps 2 and 3 via the ballasts 11 and 12.
At this time, one contact of the changeover switch 15 is turned on, the pulse generator 13 operates, and a pulse voltage is generated. This pulse voltage is superimposed on the positive half cycle waveform of the AC voltage applied from the ballast 11 to the high pressure discharge lamp 2. As a result, the high pressure discharge lamp 2 starts and lights up. After that, the output switch 15 is continuously turned on to the other contact, and the pulse generator 13 operates again to generate the pulse voltage.
This pulse voltage is superimposed on the positive half cycle waveform of the AC voltage applied from the ballast 12 to the high pressure discharge lamp 3. As a result, the high pressure discharge lamp 3 starts and lights up. Ie 2
The two high pressure discharge lamps 2 and 3 are turned on at the same time, and the amount of light is increased. After that, when the power supply 10 is cut off, the high pressure discharge lamp 2,
3 turns off together. Next, when the power source 10 is turned on, similarly, the output switch 15 is sequentially turned on from one contact to the other contact, and the high pressure discharge lamps 2 and 3 are simultaneously turned on. Next, a second embodiment of the present invention is shown in FIG. The second embodiment corresponds to the discharge lamp lighting device of claim 1.

Here, as the high-pressure discharge lamps 2 and 3, those which do not require a pulse voltage for starting are adopted. And
Output switches 17 and 18 are inserted and connected between the power supply 10 and the ballasts 11 and 12, respectively. The pulse generator 13 is omitted.

The control circuit 14 uses normally open contacts of a plurality of relays as the output switches 17 and 18. Also, the control circuit 14 outputs the output switch 1 so that the ballasts 11 and 12 are sequentially connected to the power source 10 each time the power source 10 is turned on.
7 and 18, a function means for controlling the output switches 17 and 18 so that the ballasts 11 and 12 are successively connected to the power source 10 when the power source 10 is turned on, and a function means for controlling these two. Functional means for selecting execution according to the state of the operation switch 16 is provided. Other configurations are the same as those in the first embodiment. The operation will be described. Now
It is assumed that the operation switch 16 is off.

When the power supply 10 is turned on, the output switch 17 is first turned on, and an AC voltage is applied to the high pressure discharge lamp 2 via the ballast 11. As a result, the high pressure discharge lamp 2 starts and lights up. After that, when the power supply 10 is cut off, the high pressure discharge lamp 2 is turned off.

Next, when the power supply 10 is turned on, the output switch 18 is turned on this time, and the AC voltage is applied to the high pressure discharge lamp 3 via the ballast 12. As a result, the high pressure discharge lamp 3 starts and lights up.

By alternately lighting the two high-pressure discharge lamps 2 and 3 in this way, the life of the high-pressure discharge lamps 2 and 3 can be extended to double the conventional usage period, and the labor required for maintenance is greatly reduced. It On the other hand, it is assumed that the operation switch 16 is off.

When the power source 10 is turned on, the output switch 17 is first turned on, and an AC voltage is applied to the high pressure discharge lamp 2 via the ballast 11. As a result, the high pressure discharge lamp 2 starts and lights up. After that, the output switch 18 is continuously turned on, and the AC voltage is applied to the high pressure discharge lamp 3 via the ballast 12. As a result, the high pressure discharge lamp 3 starts and lights up. That is, the two high pressure discharge lamps 2 and 3 are turned on at the same time, and the amount of light is increased. After that, when the power supply 10 is cut off, both the high pressure discharge lamps 2 and 3 are turned off. Next, when the power source 10 is turned on, similarly, the output switches 17 and 18 are successively turned on successively and the high pressure discharge lamps 2 and 3 are simultaneously turned on.
A third embodiment of the present invention is shown in FIG. The third embodiment corresponds to the discharge lamp lighting device of claim 3. One high-pressure discharge lamp 2 is connected to an AC power supply 10, and a ballast 11 is inserted and connected between each connection.

The high-pressure discharge lamp 2 has electrodes 2a and 2b, and as a starting auxiliary conductor having a polarity different from each other, a proximity conductor 4b having a polarity corresponding to a positive level pulse voltage and a polarity corresponding to a negative level pulse voltage. Proximity conductor 4
a, and when a pulse voltage (positive level) is applied between the electrode 2a and the proximity conductor 4b in a state where an AC voltage is applied between both electrodes, and the electrode 2b and the proximity conductor 4a.
When a pulse voltage (negative level) is applied between and, they start and light up respectively.

An output switch 31a of a control circuit 30, which will be described later, is inserted into the conducting portion of the adjacent conductor 4a. Proximity conductor 4b
The output switch 31b of the control circuit 30 which will be described later
Is inserted.

A pulse generator 21 is connected to the power source 10 via a ballast 11 and an output switch 32a of a control circuit 30 described later. Similarly, the pulse generator 22 is connected to the power supply 10 via the ballast 11 and the output switch 32b of the control circuit 30 described later.

The pulse generator 21 emits a positive level (+) pulse voltage for starting when energized. The pulse generator 22 emits a negative level (-) pulse voltage for starting when energized.

A control circuit 30 is connected to the power supply 10. This control circuit 30 has two relays, the normally open contact of the first relay is the output switch 31a, the normally closed contact of the same first relay is the output switch 31b, and the normally open contact of the second relay. Is used as the output switch 32a, and the normally closed contact of the same second relay is used as the output switch 32b.

The control circuit 30 also includes an output switch 32.
Pulse generator 2 by turning on and off a and 32b
1, 22 are operated alternately every time the power source 10 is turned on, whereby the function means for switching the polarity of the pulse voltage each time the power source 10 is turned on, and the output switches 31a, 31b are interlocked with the switching of the polarity of the pulse voltage. And a function means for turning on and off to selectively bring the adjacent conductors 4a and 4b into conduction.
The operation will be described.

When the power supply 10 is turned on, an AC voltage is applied to the high pressure discharge lamp 2 via the ballast 11. At this time,
When the output switch 32a is turned on, the pulse generator 21 operates and a positive level pulse voltage is emitted from the pulse generator 21.
This positive level pulse voltage is generated in the period in which the phase of the power supply voltage V is 60 to 120 degrees, as shown in FIG. 2, and the positive half of the alternating voltage applied from the ballast 11 to the high pressure discharge lamp 2 is generated. It is superimposed on the cycle waveform.

When the output switch 32a is turned on, the output switch 31b is turned on and the adjacent conductor 4b is brought into conduction. Therefore, the superimposed positive-level pulse voltage is applied between the electrode 2a of the high-pressure discharge lamp 2 and the adjacent conductor 4b, and the high-pressure discharge lamp 2 starts and lights up. After that, when the power supply 10 is cut off, the high pressure discharge lamp 2 is turned off. Next, when the power supply 10 is turned on, the control circuit 14 turns on the output switches 32b and 31a this time.

When the output switch 32b is turned on, the pulse generator 22 operates and a negative level pulse voltage is emitted from the pulse generator 22. This negative level pulse voltage is generated during the period of 240 to 300 degrees of the phase of the power supply voltage, and the ballast 1
1 is superimposed on the negative half cycle waveform of the AC voltage applied to the high pressure discharge lamp 2.

When the output switch 31a is turned on, the proximity conductor 4a is turned on, and the superimposed negative-level pulse voltage is applied between the electrode 2b of the high pressure discharge lamp 2 and the proximity conductor 4a. It starts and lights up.

Thus, by alternately using the pair of adjacent conductors 4a and 4b of the high pressure discharge lamp 2, the electrodes 2a and
The life of 2b can be extended, and the labor required for maintenance is significantly reduced. A fourth embodiment of the present invention is shown in FIG.
The fourth embodiment corresponds to the discharge lamp lighting device according to claim 4.

The two high pressure discharge lamps 2 and 3 are connected in parallel to the AC power supply 10, and a leakage transformer type ballast 40 is inserted between the connections. This ballast 40 has a primary winding 41a and a secondary winding 41b, as well as a boosting tertiary winding 41c, and these windings are wound around one iron core 42.

The high-pressure discharge lamp 2 has electrodes 2a and 2b and a proximity conductor 2c having a polarity corresponding to a positive level pulse voltage as a starting auxiliary conductor, and an AC voltage is applied between both electrodes. In this state, when a pulse voltage (positive level) is applied between the electrode 2a and the adjacent conductor 2c, it starts and lights up.

The high-pressure discharge lamp 3 has electrodes 3a and 3b, and also has a proximity conductor 3c having a polarity corresponding to a positive level pulse voltage as a starting auxiliary conductor, and an AC voltage is applied between both electrodes. In this state, when a pulse voltage (positive level) is applied between the electrode 3a and the adjacent conductor 3c, it starts and lights up.

Proximity conductors 2c and 3c are connected via respective contacts of a switching contact 50a of a latch relay 50 which will be described later, and a resistor 5
It is connected to the tertiary winding 41c of the ballast 40 via a high impedance current limiting circuit composed of 1 and a capacitor 52. The current limiting circuit works to keep the current below 1 mA to prevent electric shock. A pulse generator 13 is connected to the power supply 10 via a ballast 11. This pulse generator 13 has a positive level (+) for starting when energized.
Emits a pulse voltage of.

A latching relay 50 is connected to the power supply 10. The latching relay 50 includes a bidirectional switching contact 50a and has a function of switching the switching contact 50a each time the power source 10 is turned on. The operation will be described.

When the power supply 10 is turned on, an AC voltage is applied to the high pressure discharge lamps 2 and 3 via the ballast 40. At the same time, the pulse generator 13 operates to generate a positive level pulse voltage. This positive level pulse voltage is superimposed on the positive half cycle waveform of the AC voltage.

At this time, when one of the output contacts 50a is turned on, the adjacent conductor 2c becomes conductive. Therefore,
The superimposed positive level pulse voltage is applied between the electrode 2a of the high pressure discharge lamp 2 and the adjacent conductor 2c, and the high pressure discharge lamp 2
Starts and lights up. After that, when the power supply 10 is cut off, the high pressure discharge lamp 2 is turned off.

Next, when the power supply 10 is turned on, the other contact of the switching contact 50a is turned on. In this case, the adjacent conductor 2
c is conducted. Therefore, the superimposed positive level pulse voltage is applied to the electrode 3a of the high pressure discharge lamp 3 and the proximity conductor 3c.
, And the high-pressure discharge lamp 3 starts and lights up. After that, when the power supply 10 is cut off, the high pressure discharge lamp 3 is turned off.

Since the two high pressure discharge lamps 2 and 3 can be alternately turned on in this way, the life of the high pressure discharge lamps 2 and 3 can be extended to twice as long as the conventional usage period, and the labor required for maintenance is greatly reduced. ..

In each of the above embodiments, in order to improve the starting selectivity of a plurality of high-pressure discharge tubes, the pulse voltage is 3 V when the level is 2000 V or more and the width is 90% of the level.
It is better to use sec one.

That is, the starting characteristics of the high-pressure discharge tube were confirmed by experiments with the data shown in FIG. 6. When the pulse voltage level is 2000 V, the pulse voltage width is 90% of the level.
It is optimal to keep it at 3% or less at the% position (that is, 1800V position).

[0049]

As described above, according to the present invention, the discharge lamp lighting device according to any one of claims 1 to 6 can extend the life of the high pressure discharge lamp, and the labor required for maintenance such as replacement. Can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing the configuration of a first embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between a waveform of a power supply voltage and a waveform of a pulse voltage in the first embodiment.

FIG. 3 is a diagram showing the configuration of a second embodiment of the present invention.

FIG. 4 is a diagram showing the configuration of a third embodiment of the present invention.

FIG. 5 is a diagram showing the configuration of a fourth embodiment of the present invention.

FIG. 6 is a diagram showing experimental data of starting characteristics of the high-pressure discharge tube according to each example.

[Explanation of symbols]

2 ... High-pressure discharge lamp, 3 ... High-pressure discharge lamp, 10 ... AC power supply, 1
1, 12 ... Ballast, 13 ... Pulse generator, 14 ... Control circuit.

Claims (6)

[Claims] 1. A plurality of high-pressure discharge lamps which are started by receiving a pulse voltage, a plurality of ballasts which are respectively inserted and connected between connections of these discharge lamps and a power source, and a starter which is connected to these ballasts when energized. Pulse generating means for generating a pulse voltage of, a control means for sequentially connecting the pulse generating means to each of the ballasts every time the power is turned on, and the pulse generating means for each of the ballasts when the power is turned on. A discharge lamp lighting device comprising: control means for successively connecting the control means and means for selecting execution of these control means. 2. A plurality of high-pressure discharge lamps, a plurality of ballasts inserted and connected through switches between the discharge lamps and a power supply, and the switches are sequentially turned on each time the power is turned on. A discharge lamp lighting device comprising: a control means, a control means for successively turning on each of the switches when the power is turned on, and a means for selecting execution of these control means. 3. A high-pressure discharge lamp having a pair of starting auxiliary conductors having polarities different from each other and started by receiving a pulse voltage, a ballast inserted and connected between the discharge lamp and a power source, It is characterized by comprising pulse generating means connected to the ballast for emitting a pulse voltage for starting when energized, and control means for switching the polarity of the pulse voltage emitted from the pulse generating means every time the power is turned on. Electric lighting device. 4. A plurality of high-pressure discharge lamps each having a starting auxiliary conductor and being started by receiving a pulse voltage, a ballast inserted between the discharge lamp and a power source, and a ballast connected to the ballast. A discharge lamp lighting device, comprising: a pulse generating means for emitting a pulse voltage for starting when energized, and a control means for sequentially connecting the starting auxiliary conductors each time the power is turned on. 5. The pulse generating means has a power supply voltage phase of 60.
5. The discharge lamp lighting device according to claim 1, claim 3, or claim 4, wherein the pulse voltage is generated during a period of 120 to 120 degrees, or a period of 240 to 300 degrees. 6. The discharge lamp according to claim 1, wherein the pulse generating means emits a pulse voltage of 3 μsec at a level of 2000 V or more and a width of 90% of the level. Lighting device.