JPS58128695A - Device for firing discharge lamp - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] This WJ4 relates to a discharge lamp lighting device.

In the conventional discharge lamp lighting device, as shown in Fig. 1, power is supplied to the discharge lamp L from the K, M electric power 1iAC (W voltage V8) through the CH-type tFIIXL, and the discharge lamp L is connected to the discharge lamp LIO. Voltage response type (DXJf-
tkq to operate #S to start and light the discharge lamp L. In this case, the starter sl#i, the pulse train PT, the voltage response switch SSS, the capacitor C, the diode drawer, and the voltage response switch 5SS2
), diode Dl and voltage responsive switch s
The discharge lamp L8 is preheated in the ss, o series circuit, and the capacitor C0 is charged via the pulse transformer FT.
When the voltage exceeds a predetermined value, the voltage response switch SSS is set to 1.
The conductor conducts and discharges the electric terminal of the condenser T C through the pulse transformer A, and the resulting high voltage path of the pulse transformer is given between the non-power terminals of the discharge L and the discharge L is connected. It's a trap to start.

Regarding the operation and non-operation of the starter S, the voltage at both ends of the discharge lamp L is the line power supply voltage V8 [ma] before starting, but after the start, the tube voltage of the discharge lamp L is vLA [ma].
(■8>vLA operation) Using the decrease in K, the star IS operation is designed to operate at approximately v8, and transition to an inoperable state at vL□ when lit. When the switch is turned on, the star #S11' (voltage responsive switch SSS used
The withstand voltage required for the construction is approximately the voltage V generated before the discharge lamp LIO starts. , and a high withstand voltage is required (Special K,
(in high-power discharge lamps).

Another conventional light lighting device, as shown in No. 251JK, uses a dimmer C such as a phase control type to connect a commercial power supply AC (voltage V8).
O, inverter P rectified by full-wave rectifier DB via M
In addition to INV, the output of this inverter JI INV supplies the energized sample L, t! When the filament Y is preheated, the voltage-responsive 1110 starter S1 is activated to start the discharge lamp L.
K is being pressed to start the machine and turn on the lights. In this case, the inverter INV is a League-S) type isolated generator II! ) Fungistor Q□, Q2 connected with a brush nibble between both ends of the primary winding of the transformer OT, and both ends of the feedback winding of the isolated oscillation transformer OTO are connected to the fungis IQU, Q, 0 bases, respectively, and) Run V star Q engineering, Q1 collector/
A voltage is applied from the Kinwave rectifier IIDB between the emitters and the coils CH and the primary winding of the insulated jumper JOT0, and the output of the Kinwave rectifier 1i1DB is smoothed with a resistor R and a capacitor to form the Tofun ν star Q. , Q, is supplied as a base current through base resistors R,1,Rs, and Q2 repeats the ON operation alternately at a constant cycle and oscillates at several tens to hundreds of KH1. The oscillation output of and appears at the secondary winding of the isolation oscillation transformer OT. t, Starter S2#
'i, as shown in Fig. 3, it consists of a path V (F), a capacitor C5, a voltage response switch 5SS3, a diode D2, and a resistor R4, and when the charging voltage of the capacitors reaches a predetermined value, the voltage responds. The switch SSS is turned on to discharge the charge in the capacitor C5 through the bypass transformer PT2, and the resulting high voltage pulse of the pulse transformer P'r2 is applied to the discharge lamp L2K to start the discharge lamp L2.

But a discharge lamp with such a configuration? L light cover is 50
Compared to the case of lighting at a commercial frequency of Hz or Fi60Hz, the voltage value required for starting is higher, and the voltage V across the discharge lamp L before starting. Q4h is large, and especially in the case where a dimmer CK such as a phase control type is installed in front, the above voltage V is calibrated in advance in the dimmer part to ensure pulsation performance from a good state. The design value for this is set high.

Therefore, the voltage responsive switch 5SSs built into the starter 82 is required to have a higher withstand voltage.

As mentioned above, it is a voltage responsive starter S type.

In 88, the operating power of the starter Sl's was obtained from both ends of the discharge sump L□ and L2, so the star JIS, 3. Voltage responsive switch SSS, ss
s, g A friend that requires high withstand voltage. As a means of lowering the withstand voltage of the starter S shown in Figure 1, we reduced the voltage across the Ichimmon Densunde L using a step-down transformer.
There is a method to operate the voltage responsive switch SSS with a stepped down voltage, but the shape of the step-down twang has prevented miniaturization of the starter S.

SUMMARY OF THE INVENTION An object of the present invention is to provide a discharge lamp lighting device that can lower the withstand voltage of the ID pressure-responsive switch in the starter without increasing the size of the starter.

A simple embodiment of this invention is shown in FIG. That is, this powered lamp lighting device connects the power source of the starter 5H to the inverter IN.
By taking the voltage from the intermediate tap of the secondary winding of the Y-type isolation oscillation transformer 0T0, -psQo The voltage applied to the voltage responsive switch SSS is lowered, and the withstand voltage of the voltage responsive switch 5SS3 can be lowered without using a separate step-down transformer. Other configurations #'i are the same as those in FIG. 2.

To explain in more detail, in the fourth factor, the inverter-type discharge lamp lighting Mt that performs high-frequency lighting is one case!
The change in the secondary voltage of the 7-type isolation oscillation transformer OT is the voltage V before the discharge runde L2 starts. , and the snow pressure vLA is lit.
Focusing on the fact that it is proportional to the change in 2, the isolation oscillation transformer O
A new intermediate tap point C is created on the secondary side of T, and C- changes proportionally to changes in the voltage across the discharge sample L1.
The voltage across D is taken as the voltage source of star lS2, and the voltage between starter S
The operation/non-operation of a is determined. That is, starter S2o pressure response switch SSS, discharge fan L20
C-D changes by 2 in response to changes in voltage across both ends 1%5
Of the iD voltage, the pressure V before discharge lamp L2C1 starts
. It operates with respect to DO to generate a high voltage pulse, and stops its operation at voltage VoD□ after the discharge sample L2 is started.

Another embodiment of the invention is shown in FIG. In other words, this discharge lamp lighting device has W! , the pulse transformer PT in Figure 4,
°, use Bass V Steffns PT3 instead of dimmer C
K is omitted. This pulse transformer hit.

By magnetically forming the primary winding with the secondary winding of the insulating transformer OT, the secondary winding is configured so that the secondary winding also serves as the insulating transformer OT, and the pulse ) The lance n is miniaturized. The composition and effects of the noodles are
It is the same as that shown in FIG. 4 except that the dimmer CK is omitted.

In the above embodiment, the present invention is applied to a discharge lamp lighting device having an inverter ballast.
The present invention can be similarly applied to a discharge lamp lighting device having a stability II (for example, a leakage type isolation transformer) that lights at a commercial frequency of 60 Hz or 60 Hz. Also, the fourth
As shown in the figure, IQ light shape lIK punch V! In the case of a dimming stabilizer that takes into account starting from a ballast state, the no-load secondary voltage is set higher than that of a membrane ballast, so lowering the withstand voltage has an even greater effect.

As described above, the discharge lamp lighting device of the present invention provides an AC power supply, a discharge lamp powered by the AC power supply and lit, and a stabilizing element interposed between the AC power supply and the discharge lamp. Leakage type isolation transformer and this insulation F
The starter is equipped with a voltage-responsive starter that is supplied with power from the intermediate tap of the secondary winding of the lance and generates a high-voltage bus in response to turning on of a voltage-responsive switch to start the discharge lamp, thereby increasing the size of the starter. This has the effect of lowering the withstand voltage of the voltage responsive switch in the starter.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram of a conventional discharge lamp lighting device, Fig. 2 is a circuit diagram of another conventional discharge lamp lighting device, Fig. 3 is a specific circuit diagram of its main part, and Fig. 4 is an implementation of the present invention. Example Circuit Diagram FIG. 5 is a circuit diagram of another OsJ embodiment of the present invention. AC・-AC power supply-INV...in/<-ta, OT・
・・Absolutely oscillating transformer-L2 ・・Discharge lamp, SR・
...S I-I, 5SS3... Voltage response switch, P
Tj! , FT,...Pulse transformer, C3...Capacitor bottom 1 Figure 2 Figure Δ, Figure 3/INV Figure 4 INV, / Figure 5

Claims (1)

[Claims] There is no need to worry about intervening between the AC power source, the discharge lamp that is powered by the AC power source, and the AC power source and the discharge lamp! The leakage type isolation transformer that is the element,
A discharge lamp lighting device comprising: a voltage-responsive starter that is supplied with power from an intermediate tap of a secondary winding of the insulating transformer and generates a high-voltage bus M in response to turning on of a voltage-responsive switch to start the discharge lamp.