TH26609A - Electronic ballast - Google Patents

Abstract

The electronic ballast according to this invention consists of a filter circuit. Bridge rectifier A converter circuit, which, according to one fabrication model, is a compound-type converter. And according to another invention model, it is a reverse converter Which is a sensitive filter to get a high input power factor And the harmonic of the input current is low. Inverter resonant circuit The converter circuit can work by changing the resonance inverter circuit. Without using an integrated circuit to reduce the size And production costs Electronic ballast used with a gas discharge tube with a capacitor across the gas tube at both ends. The capacitors are connected to the internal terminals of the same or similar starters used in the iron-core ballast circuits for the discharge gas lamps. The material will be installed in the same location as the strainer used for the iron core ballast circuit for the discharge gas lamp. This is to make it easier to install in order to switch from iron-core ballasts to electronic ballasts. Which makes it possible to reduce the number of electrical cables

Claims (1)

Disclaimer (all) which will not appear on the advertisement page. : (Lack of documents on page 1) The output of the aforementioned converter circuit is the anode of the diode that 1 (12) above And the cathode of the output of the converter circuit is also connected to the cathode of the diode that 3 (51) which is connected in series with a circuit of resistor (53) connected in parallel with capacitor 4 (52) and to the negative pole of such rectifier (3). The output terminals of the converter circuit are connected in parallel with a capacitor that 1 (13) and connect to the input of Resonance inverter circuit (DC / AC Resonance Inverter) consisting of a sensitive switch at 2 (23) Quick switch circuit, work at 2 (21) switch at work 3 (22) Switch-off circuit works at 3 (20) and has a load consisting of a discharge gas tube (33), whose cap is crossed by a capacitor that 2 (32) is connected in series with a resonant circuit with a frequency dependent impedance consisting of an inductor that 2 (30) in series with an inductor that 3 (31) and a capacitor that 3 (34) where the load is connected across the switch, work No. 2 (23) 5. Electronic ballast circuit for igniting the discharge gas lamp according to claim 4, the switch is sensitive to 1 (11) switch at work 2 (23) and the switch works at 3 (22) is controlled by means of a change in current flowing through an inductor. 2 (30) which the switch works at 2 (23) and the switch works at 3 (22) will operate in an alternating manner with approximately the same switching period. With the switch to work at 1 (11) can be selected to operate at the same time and have approximately the same switch operation period as the switch at 2 (23) or a quick switch at 3 (22) Either 6. Electronic ballast circuit for igniting the discharge gas lamp according to claim 4, which is characterized by such converter circuit is a return convector circuit. (Flyback Converter), which is switched quickly. 1 (11) is controlled by the change in the current flowing through the resonant inverter circuit 7.Electronic ballast circuit for igniting the discharge gas lamp pursuant to claim 1 or 4. There is a unique The capacitors (32), connected to the cap, are housed inside the container (300), where the container (300) is provided with two external electrodes to which the terminals are connected. Electrically with such capacitors (32) This makes it possible to install in a common starters installation location for fluorescent lighting (33) circuits using conventional iron-core ballasts.