MXPA02009768A - Base ballast. - Google Patents

Abstract

The present invention discloses a base ballast system having a device and an electronic circuit placed within this device to operate a fluorescent tube of instantaneous ignition.

Description

BALASTRA BASE Background of the Invention The use of fluorescent lamps is very advantageous over incandescent lamps since they present greater efficiency in the electrical consumption in relation to the luminosity. However, the use of these lamps have two problems for its operation, the first is that to start, require a much higher voltage than commercial or home and once established the electric arc, must admit a voltage drop greater than 50 %; usually. These problems have been solved by the use of a device specifically created for this purpose, that is, a transformer or ballast, with characteristics such as to admit the operating conditions, with the disadvantage that the size and weight of the ballasts makes installation difficult , besides that they take a few moments to turn on.

There are two types of ballasts: 1) Electromagnetic, which are composed of an iron core and a copper wire winding and work at the frequency of the network (60 cycles) making the device bulky and heavy in addition, this frequency is audible so the transformer is encapsulated in chapopote or another element that dampens noise and dissipation of energy resulting in heavy equipment, bulky and inefficient. 2) Electronics, with the advantages that they do not make noise, they do not present the problem of the flicker, they are smaller than the electromagnetic ones, since when working at a higher frequency than the electromagnetic, they reduce their size and weight considerably, thus achieving a Higher efficiency however, have a high cost compared to electromagnetic.

The present invention relates to an economical system for the ignition of instantaneous ignition tubes (Slim Line), based on an oscillator circuit used in two-electrode quick ignition tubes, with a novel design for igniting an instant ignition tube of a only electrode and a physical device, which as a preferred embodiment includes said circuit.

Object of the Invention The object of the present invention is to provide an instant ignition system for fluorescent light lamps (Slim Line); It is another object of the invention to provide a physical device that replaces the current supports of the tubes and at the same time provides the electrical operating conditions.

It is another object of the invention to provide a system that does not make noise, that does not present the problem of flicker, that is versatile, small, reliable, efficient and cheap.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 presents an electronic diagram of the prior art.

Figure 2 shows the electronic diagram of the present invention.

Figure 3 shows the top view of the base support.

Figure 4 provides a front view of the base support.

Figure 5 is a side view of the base support.

Figure 6 is a perspective view of the base support.

Detailed description of the invention The present invention is an inverter circuit, consisting of a voltage doubler rectifier, which powers an oscillator that was originally designed to light a fast-ignition fluorescent tube having two electrodes on each side, to operate in a "Slim Une" tube. "It only has one electrode on each side, which makes it a simpler circuit and better priced than conventional ones.

The new circuit solves two major problems, the first is that the two-electrode fast start tube for the originally designed circuit works with the hot cathode and therefore requires, for its ignition, on the one hand, to heat the filament and on the other, the high starting voltage. The second big problem is that the oscillator closes its circuit through each filament of the tube (Fig. 1) so if the tube separates from the circuit or its useful life ends, the circuit automatically stops oscillating.

A "Slim-Line" tube lacks these electrodes, therefore, the capacitor that closes the circuit to achieve the oscillation principle, must be connected independently of the lamp 270 of Figs. 1 and 2 so that when the lamp is removed from the circuit or its useful life ends, the oscillation does not stop and this would cause the circuit to self-destruct quickly, this drawback is solved with the design of the circuit of the present invention.

The power supply of the line (95 to 145 VAC) enters a voltage doubler rectifier that is formed by the diodes (10) and (20) and the capacitors (30) and (40) obtaining from this, around 300 VDC, which are supplied to the oscillator circuit formed by (200) and (100), (170), (240) and (140) which are magnetically concatenated producing a positive feedback that results in a natural oscillation frequency in the components in the environment from around 24 to 36 KHz. The components (190), (210), (230), (220) provide operating parameters and protection to the inductive load of (180) on (200), in the same way as (70), (90), (80) ) and (110) do it with (00).

The circuit that is formed with (120), (130), (160) and (150) serves exclusively for the start of the oscillation when the feed is just applied, once (150) is loaded through (130) at a greater potential than the break of (120) it applies a positive potential to the base of (100) that discharges to (250) and (260) through (170) that induces a potential over (240) and ( 140) thus achieving the principle of oscillation.

This oscillation is applied to (180) which increases the voltage around 700 V for the start of the arc that ignites the lamp, at the same time allowing its drop to about 220 V which is the continuous operating voltage of the lamp once which goes into stable operation.

The current of the lamp passes through a medium of (500) and (510) which detect the existence of the lamp or the proper functioning of it, since when the useful life of the lamp ends, it changes its characteristics of operation which are detected by the circuit (500) and (510) and turn off the oscillator -if these parameters vary beyond what is established- interrupting the power supply to avoid self-destruction of the circuit and make it safer.

The correct operation of the lamp causes the other half of (500) to be continuously discharging to (530) since otherwise it is charged to a voltage that trips to (540) and this diverts to ground, the polarization of ( 550) and (560) cutting the power supply to the oscillator to prevent its destruction and this remains cut off until the power is suspended for more than 10 seconds and turned on again. This charging time of (520) is very important, since the ballast always starts its operation "sees" or checks if there is no lamp or if it is in operating conditions, and if there are no problems, continues energizing the oscillator. Otherwise it would never fire as a result of circuit programming, also resulting in providing power for 2 to 3 seconds, which is the average time during which the arc is established.

The invention and development of the protection circuit formed by (500), (520), (570), (530), (580), (590), (540), (600), (610), (550) and is the purpose of the electronic part of the present invention.

In a preferred embodiment the present invention is provided in a physical form, which includes the circuit of the invention within the body of the base that supports and provides energy to the fluorescent lamp (Fig. 6), wherein the section (930) is provides in the form of a turret and is the place where the lamp is inserted and this has a double function, the first one of subjection and the other of feeding, since in its interior one of the electrodes is located.

The threaded hole (940) holds the ballast to the luminaire.

Two screws (900) and (910) hold the power cables.

Finally, (920) is the screw through which the connection to the other electrode of the lamp goes via its corresponding base.

Claims (11)

1. Base ballast characterized in that it includes an electronic lighting system of Slim-Line type lamps, instantaneous that is arranged inside a base support.

2. The base ballast according to claim 1, characterized in that it includes an electronic circuit which in turn includes a rectifier voltage doubler circuit, an oscillator circuit, a circuit to start the oscillation, a circuit that de-energizes the oscillator when it does not exist load of lamp and a circuit that admits the operation while the load of the lamp exists and when it is in operating conditions.

3. The base ballast according to claim 2, characterized in that the double-voltage rectifier circuit consists of two diodes and two capacitors, which supply direct current to the system.

4. The base ballast according to claim 2, characterized in that the oscillator circuit consists of two transistors and three magnetically concatenated inductors, characterized by producing positive feedback producing a natural frequency.

5. The base ballast according to claim 2, characterized in that the circuit to start the oscillation formed by the DIAC, the resistance, the diode and the capacitor have the objective to start the oscillation of the oscillator circuit.

6. The base ballast according to claim 2, characterized in that the circuit that comes into operation while there is no load on the lamp is formed by an optocoupler to regulate the load of a capacitor that triggers an SCR through which the current is diverted. supplies power to the lamp,

7. The base ballast according to claim 2, characterized in that a capacitor calibrated to store energy in a certain time interval and reaching its limit polarizes an SCR that turns off the set of cascaded transistors, preventing the circuit from being consumed.

8. The base ballast according to claim 2, characterized in that the circuit that comes into operation while there is charge of the lamp is formed by the light emitting diode and the resistance that register the passage of current, preventing the safety capacitor from charging closing the circuit with cascaded transistors.

9. Base support according to claim 1, characterized in that the instant ignition electronic system is included therein.

10. The base support according to claim 9, characterized in that it includes a turret with a lamp insertion section, a threaded hole for its attachment, which is in the same position as the commercial bases to facilitate its direct replacement, a connection design with the electrode of the lamp for a direct replacement of the clamping bases of the conventional tubes.

11. The base support according to claim 9, characterized in that it includes a turret of standard shape and size that includes the insertion section of the tube electrode. Extract of the Invention The present invention is a base ballast system consisting of a physical device, shown in a preferred embodiment in the description of the present application, and an electronic circuit placed within this physical device for operating an instant ignition flourescent tube.