JPS595599A - Mode switching unit for serial 2-lamp type 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 The present invention provides a two-lamp lighting mode in which both surface discharge tubes are lit, and a two-lamp lighting mode in which only one discharge tube is lit, for a series two-lamp type discharge lamp in which two discharge tubes are connected in series. One light lighting mode,
The present invention relates to a mode switching device Vc for switching between a two-light extinguishing mode in which both surface discharge tubes are turned off, or switching between lighting with dimming and lighting without dimming.

Conventionally, in order to perform the above-mentioned switching in a two-lamp discharge lamp in series, a dedicated switch is provided on an external distribution board, and switching is performed manually by operating the switch.

However, according to this, in addition to the power supply wiring, special wiring for mode switching (wiring connection to the distribution board) must be installed for each of the two discharge tubes of each discharge lamp. The disadvantage is that the equipment requires a large amount of expense.

The present invention enables the mode switching as described above to be performed economically and automatically all at once by simple remote control without the need for special wiring installation,
This eliminates the conventional drawbacks as described above.

That is, the mode switching device of the present invention also includes a rectifier circuit that rectifies a current voltage, a thyristor connected to the rectifier circuit, a starter circuit connected in parallel to the thyristor, and a circuit connected to these thyristors and the starter circuit. When the thyristor is started by the starting circuit, the current flowing through the thyristor starts the thyristor and strikes the starting circuit, restraining the thyristor in its operating state while turning the thyristor off. When this occurs, a timer circuit is activated to activate the on/off operation of the thyristor and a timer circuit that activates the activation circuit by pulling it for a certain period of time T and restricting the thyristor to an inoperable state during that time.

This device is characterized by comprising a relay whose deenergization is controlled to switch relay contacts, and an impedance element connected to the relay contact pressure.

Therefore, for example, when an external power switch is first turned on, the thyristor is turned on and the relay is energized, and when the power switch is turned off, the thyristor is simultaneously turned off and the relay is activated. When the power switch is turned off and the tube is turned on again, the time when the power is turned off is the same as the time when it is turned on again.
If the time between noodles and 3 zelkova fish is within a certain time T,
The relay is energized until the thyristor is off, and if it remains for a certain time T or more, the thyristor turns on and the relay is energized. The relay contact is switched by the deenergization trap, and it is thereby possible to control whether the impedance element is connected or not.

Therefore, for a two-lamp discharge lamp in series, for example, the rectifier circuit or thyristor of the mode switching device of the present invention is installed between the primary side of the transformer and the external power switch. Starting side t! 8. Connect the timer circuit and relay, and on the other hand, the secondary side of the transformer -
If an impedance element is connected between the +7 and one discharge tube, and an impedance element is connected between the secondary side and the other discharge tube, first turn on the external % source switch.
When both IWs light up and the two-lamp lighting mode υ, and the power switch is turned off once and then turned on again within a certain period of time, one discharge tube will be cut off from the transformer by opening the relay contact. While the light goes out, the other discharge tube enters the single-light mode in which it is turned on by applying the transformer's secondary voltage through an impedance element, and -f
If you turn it on after the time T has elapsed, it will go back to the two-lamp lighting mode.

In addition, when a relay contact and an impedance element are connected between a power switch and the primary side of a transformer, when the external t# switch is first turned on, the power supply voltage is directly passed through the relay contact to the t: transformer. By shifting the voltage to the primary side of 1, the electric current tube enters the normal discharge mode where the light is not dimmed, and when the power switch is turned off and then turned on within a time T, the relay contact force; ψ ) υ and the t# voltage is reduced through the impedance element and applied to the primary side of the transformer, which puts the tube into a dimming discharge mode, and when it is turned on after a certain period of time T has passed, it returns to normal. The discharge mode is as follows.

Therefore, according to the present invention, the mode switching as described above can be performed by
This can be done automatically and economically by remote control using a power switch and without requiring dedicated wiring facilities.

The present invention will be described in detail below with reference to two embodiments: a first embodiment shown in FIG. 1 (FIG. 2 is a time chart showing its operation) and a second embodiment shown in FIG. 3.

First, in the first embodiment, a two-lamp discharge lamp A in series can be switched between a two-lamp lighting mode, a one-lamp lighting mode, and a two-lamp extinguishing mode.

As is well known, the discharge lamp A consists of two discharge lamps connected in series.
Tube (fluorescence %') 1.2, primary winding 3゜2, secondary winding 4
, a transformer 6 having a filament heating winding 5...
, a phase advancing capacitor 7 and a resistor 8 connected to the secondary winding 4, and a sequential lighting capacitor 9.

This mode switching device includes a rectifier circuit 10 that rectifies an AC voltage to obtain a DC voltage, a thyristor 1'1, a starting circuit 12 that starts this thyristor 11, and this starting circuit 12.
a timer circuit 13 that controls the timer circuit 13; a relay 14 that is energized and deenergized by the on/off operation of the thyristor 11;
The relay contact 15 and the capacitor 16, which is an impedance element, are counted.

The rectifier circuit 10 includes a bridge rectifier 17 in which diodes are bridge-connected, and a resistor 18 and a filter capacitor 19 that constitute a smoothing circuit are connected in parallel.

The starting circuit 12 includes a resistor 20, 21 connected to the gate of the thyristor 11 and a capacitor 22.

This starting circuit 12 is connected in parallel to the anode and cathode of the thyristor 11 so that one rectified DC voltage is applied to the rectifier circuit lO together with the one ristor 11.

The timer circuit 13 is connected to the thyristor 11 and the starting circuit 12 so as to be operated by a current flowing between the anode and cathode of the thyristor 11 to control the starting circuit 12 .

That is, the timer circuit 13
0, the transistor 23 connected in parallel to the thyristor 1
a diode 24 for operating the transistor 23 by rectifying the current flowing between the anode and cathode of the transistor 1;
It consists of a capacitor 25, which is charged via this diode 24' (+-), and resistors 26, 27, and 28.

The AC input terminal of the rectifier circuit 10 is connected in series with the relay 14, and this series connection circuit is connected in parallel with the primary winding 3 of the transformer 6. When the power switch 29 is turned on, the primary winding Along with the line 3, an AC power supply 30 applies an AC voltage of %.

On the other hand, the relay contact 15 connects its common terminal to the connection point between the phase advancing capacitor 7 and the filament heating winding 5, and also connects the normally open side terminal to one of the discharge tubes 1, and the l'c normally closed side terminal. are connected to the connection points of both electric tubes 1 and 2 via capacitors 16, respectively.

When the power switch 291 is turned on, a DC voltage is generated in the rectifier circuit 10 by the application of a transformer voltage, and at the same time as the DC voltage is applied, the thyristor 11 is activated by the activation circuit 12 as shown in FIG. Turns on.

When the thyristor 11 operates in this manner and a current flows between its anode and cathode, a voltage drop occurs at the resistor 26 in the timer circuit 13. As a result, the capacitor 25 is charged via the diode 24, and the transistor 23 is activated.

Thus, the resistor 20 in the starting circuit 12 is blanked out,
The thyristor 11 is constrained to its operating state, which causes the timer circuit 13 to continue operating once again as shown in the figure.

When the thyristor 11 is off, the relay 14 cannot be energized because a high impedance is added to the rectifier circuit 10, but when the thyristor 11 is on, the impedance becomes low and the relay 14 is energized. .

Therefore, when the thyristor 11 is turned on as described above by turning on the power switch 29, the relay 14 is energized and the relay contact 15 is switched from the normally closed terminal side to the normally open terminal side. , one of the discharge tubes 1 is substantially connected to the phase advance capacitor 7 and the filament heating winding 5, so that both nine discharge tubes 1.2 are lit.

When the power switch 29 is turned off in such a state, both the electric tubes 1.2 are turned off and the thyristor 1 is turned off.
1 is turned off and relay 14 is deenergized. When the power switch 29 is turned off in this way, the thyristor 11 is also turned off at the same time, but in the timer circuit 13, the transistor 23 continues to operate for a certain period of time (for example, 2 to 3 seconds) due to the residual charge in the capacitor 25. Therefore, the startup circuit 12 continues to operate during that time.
will be played. Therefore, the thyristor 11 is connected to the power switch 2.
9 is turned off, it is restricted to an inactive state for one time T.

Therefore, as shown in Figure 2 (G), the constant time T
When the power switch 29 is turned on again during the operation, the thyristor 11 does not operate because the starting circuit 12 has been activated by the timer circuit 13 as described above.

As a result, the relay 14 is maintained in a state in which its relay contact 15 has returned to the normally closed terminal side until t when the relay 14 is deenergized, so that the power switch 29 of one discharge tube 1 is turned on and the transformer 6 is The other discharge tube 2 does not light up even though an alternating current voltage is applied, but the capacitor 16
The secondary voltage of the transformer 6 is applied via the transformer 6 to turn on the light. Therefore, the discharge lamp A is automatically switched from the two-lamp lighting mode to the one-lamp lighting mode.

On the other hand, as shown in the same figure (B), when the power switch 29 is turned on again after a certain period of time T has elapsed, the risk 11 is released from the non-operating restrained state, so the thyristor 1
1 is turned on again, which energizes the relay 14 and switches its relay contact 15 to the normally open terminal side.
Both tubes 1.2 are lit again, and discharge lamp A is again in the two-lamp lighting mode.

Next, in the supply 2 embodiment shown in FIG.
2 can be switched between dimming and emitting 1 and discharging without dimming (step dimming).Relay contact 15 and capacitor 16 are connected to the input side of transformer 6. The only difference from the above m1 example is that the other configurations are the same.

That is, the common terminal of the relay contact 15 is connected to the power switch 29, and the capacitor 16 is connected to the primary winding 3 of the transformer 6, and when the relay 14 is energized as described above, L1
By applying the AC voltage of the AC power source 30 directly to the primary *Sa through the capacitor 16, which is an impedance element, both the electric tubes 1 and 2 enter the normal discharge mode in which the light is not dimmed, and When the relay 14 is de-energized, a reduced AC voltage is applied through the capacitor 16, so that the electric current tube 1.2 enters the dimming discharge mode.

Therefore, when a large number of discharge lamps A are wired in parallel to one power switch 29, this mode switching device must be connected as described above for each discharge lamp.
? By operating one power switch 29 at the above intervals, all the discharge lamps can be automatically switched to the above mode at the same time, which is economical and does not require separate dedicated wiring for each discharge lamp. It is possible to perform switching υ, and it is also extremely beneficial in terms of energy saving.

In addition, the mode switching device itself has a simple configuration and can be provided at low cost, and if it is made into an independent single item structure and can be easily attached to each discharge lamp, existing wiring and discharge lamps can be easily replaced. By using this, you can carry out the above-mentioned things even more efficiently. .

Note that in the above embodiment, the capacitor 16 is used as the impedance element, but it may also be a reactor.

[Brief explanation of the drawing]

Figure 1 is an electrical and electrical circuit diagram showing one embodiment of the present invention, Figure 2 is a time chart for explaining its operation, and Figure 3 is a time chart for explaining its operation.
The figure is an electrical circuit diagram showing the second embodiment. 10... Rectifier circuit, 11... Thyristor, 12...
- Starting circuit, 13... Timer circuit, 14-... - Relay, 15... Relay contact, 16... Capacitor which is an impedance element. Patent applicant Fuji Takema −

Claims (1)

[Claims] L A rectifier circuit that rectifies alternating current voltage, a thyristor connected to this rectifier circuit, a starting circuit connected in parallel to the thyristor, and a thyristor connected to these thyristors and the starting circuit so that the thyristor is started by the starting circuit. When
The current flowing through the thyristor starts the thyristor, triggers the starting circuit, and locks the thyristor in its operating state.When the thyristor is turned off, you continue to activate the starting circuit for a period of time T. a timer circuit that restricts the thyristor to a non-operating state only during that time; a relay that switches the relay contact by controlling the energization and deenergization according to the on and off operations of the thyristor; and the relay that switches the relay contact. Series 2 characterized by comprising an impedance element.
Mode switching device for lamp-type discharge lamps.