JPS591360Y2 - Xenon lamp lighting device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a xenon lamp lighting device in which a plurality of xenon lamps are connected and the xenon lamps are lit in order from the lowest discharge starting voltage.

Usually, a xenon lamp lighting device installed on a fishing boat or the like operating in the distant sea has a configuration as shown in FIG.

That is, in the figure, B is the positive power terminal of the DC power supply,
G is the negative power supply terminal of the DC power supply, 1 is the DC-AC converter connected to both power supply terminals B and G, and D, C are the rectifying terminals connected to the output terminal of the 1Dc-AC converter 1 connected in series. Diode and first capacitor for charging, R5
C2 is a resistor and a second capacitor connected in series and connected in parallel to the first capacitor C1; S is a bidirectional trigger for triggering connected in series with the primary winding L1 of the trigger transformer TT and connected in parallel to the second capacitor C2; Gr is a xenon lamp Xe whose anode A and cathode K are connected to the output terminal of the DC-AC converter 1 via a diode D, and Gr is a xenon lamp Xe whose anode A and cathode K are connected to the secondary winding L2 of the trigger transformer TT. This is the trigger electrode.

Then, when DC power is applied to both power terminals B and G, D
It is converted into an alternating current voltage by the C-AC converter 1, and this alternating voltage is rectified by the diode D to charge the first capacitor C1, and a high direct current current is obtained across the first capacitor C1.

Furthermore, this voltage is applied to the second capacitor C via the resistor R.
When the voltage across the second capacitor C2 reaches a predetermined voltage, the bidirectional thyristor S is turned on, and the charge of the second capacitor C2 is instantaneously transferred to the primary winding of the trigger transformer TT. Discharged.

As a result, a high voltage is induced in the secondary winding L2 of the trigger transformer TT, and the trigger electrode Gr of the xenon lamp Xe
A high voltage is applied to the trigger electrode Gt-, and electrons are emitted from the cathode K due to the field emission phenomenon between the trigger electrode Gt- and the cathode, causing cold cathode discharge between the anode A and the cathode, and the xenon lamp Xe is lit.

At this time, the xenon lamp Xe emits a strong flash of light as all the charges stored in the first capacitor C1 are discharged.

Incidentally, as shown in FIG. 2, the deterioration of the life of the xenon lamp Xe appears as a phenomenon in which the discharge starting voltage Vs increases.

In addition, the xenon lamp Xe generally has a discharge starting voltage Vs
Further, due to the complex structure inside the tube of the xenon lamp occurs.

It is also difficult to produce a stable and long-life xenon lamp Xe.

Therefore, it is difficult to estimate the lifespan of the xenon lamp Xe, and the conventional lighting device
Since only one xenon lamp Xe is set at a time, in fishing boats operating in the distant sea, it is necessary to prepare a large number of xenon lamps Xe as spares, and to frequently replace the xenon lamps Xe at sea. Xe
It is also difficult to immediately detect a failure and replace it.

In addition, even if the luminescent ability in any case is due to an increase in the discharge starting voltage Vs, or if it stops emitting light due to factors such as the amount of ambient light, brightness in the dark, or ambient temperature, it will still emit light when an overvoltage is applied, and - When the lamp emits light, the discharge starting voltage Vs decreases (generally, when a xenon lamp that is at rest starts to light up, its discharge starting voltage Vs decreases by -1).
, some of them light up even when standard voltage is applied.

That is, although it is not easy to determine whether a xenon lamp Xe that has stopped lighting is good or not, in an apparatus in which only one xenon lamp Xe is set, it must be replaced immediately, which is uneconomical.

This invention takes into consideration the drawbacks of the conventional method, connects a plurality of xenon lamps in parallel to a high-voltage DC power supply, and lights each xenon lamp in sequence starting from the one with the lowest discharge starting voltage Vs.
e is used in parallel to even out the fluctuations in life, and provides an inexpensive device that can be used for a long period of time without replacement and eliminates accidents when the lights go out.

Next, this invention will be explained in detail with reference to drawings showing one embodiment thereof.

In FIG. 3, the same symbols as in FIG. 1 indicate the same things, and Xe1. Xe2 are first and second xenon lamps connected in parallel to each other and connected to the DCAC converter 1, and respective trigger electrodes Gr1. Gr2 is 1
- Rigger 1 - Connected to the secondary winding L2 of the lance TT.

Next, the operation of the above embodiment will be explained.

The operation until a trigger electrode is generated in the secondary winding L2 of the trigger transformer TT is exactly the same as in the case of FIG. 1.

Therefore, the high voltage induced in the secondary winding L2 of the trigger I lance TT is applied to the trigger electrodes Gr, Gr2 of the first and second xenon lamps Xe, Xe2.
are applied simultaneously.

And xenon lamp Xe1. As mentioned above, Xe2 always has a difference in discharge starting voltage Vs. For example, if the first xenon lamp Xe1 has a lower discharge starting voltage Vs than the second xenon lamp Xe2, then the first xenon lamp Xe, is lit first and lights up, and the second xenon lamp Xe2 does not light up.

This is because the first xenon lamp Xe1 is lit first, so that the voltage between the anode A1 and the cathode 1 drops, and the second xenon lamp Xe, which has a higher discharge starting voltage Vs,
2 does not light up.

The discharge starting voltage Vs of the first xenon lamp Xe1 gradually increases as it is repeatedly turned on, and when it becomes equal to the discharge starting voltage Vs of the second xenon lamp Xe2, both lamps start lighting. Xe2
The discharge starting voltage Vs of the lamp becomes lower immediately after it starts to light up, so it becomes lower than that of the first xenon lamp Xe1, and soon only the second xenon lamp Xe2 comes to be lit.

As the second xenon lamp Xe2 is repeatedly turned on, its discharge starting voltage Vs also gradually increases.

In this way, the first and second xenon lamps Xe1
By alternately lighting the xenon lamps Xe2 as appropriate, the xenon lamps Xe1. The lifetime variations between Xe2 are averaged out, and the two xenon lamps Xe1. Xe2 and Sera1 at the same time
It can be used for a long time by doing ~.

Incidentally, instead of the bidirectional thyristor S in the above embodiment, a triggering element such as a relay discharge tube may be used.

As described above, according to the xenon lamp lighting device of this invention, a plurality of xenon lamps are connected in parallel to a high-voltage DC power source, and each trigger electrode of the xenon lamps is connected to a 1-1) 1-rigger circuit that generates a Gar pulse. By connecting each xenon lamp to the Therefore, it is very effective for fishing boats and the like operating in the distant sea.

In addition, in the case of a single xenon lamp as in the past,
Due to variations, it may be necessary to replace them within a short period of time, but by using two or more lamps in parallel, the lifespan will be averaged and the lamps can be lit stably for a long time, making maintenance extremely easy. become.

Furthermore, a xenon lamp that has stopped lighting due to some reason may be re-triggered due to a change in conditions such as the application of an overvoltage, which is economical because variations in the life of the xenon lamp are averaged out.

Furthermore, each xenon lamp can be switched and turned on without using any complicated switching circuits, and the structure is simple and inexpensive.

[Brief explanation of the drawing]

Figure 1 is a wiring diagram of a conventional xenon lamp lighting device, Figure 2 is a wiring diagram of a conventional xenon lamp lighting device.
The figure is a characteristic curve diagram of a xenon lamp, and FIG. 3 is a wiring diagram of one embodiment of the xenon lamp lighting device of this invention. Xe1. Xe2...Xenon lamp, Grl,
Gr2...Toger electrode.

Claims (1)

[Scope of utility model registration request] A series circuit of a resistor and a second capacitor is connected in parallel to the first charging capacitor, a plurality of xenon lamps are connected in parallel to the first capacitor, and a triggering element is connected to the second capacitor. A xenon lamp lighting device, wherein a series circuit with a primary winding of a trigger transformer is connected in parallel, and a trigger electrode of each of the xenon lamps is connected to a secondary winding of the trigger transformer.