CS215237B1 - Connection of resistor for fluorescent lamps - Google Patents

Description

BACKGROUND OF THE INVENTION The present invention relates to the connection of a ballast for supplying fluorescent lamps from the mains.

In known ballast solutions, an iron core choke is most commonly used. The disadvantage of this type of ballast is the high consumption of material, iron and media, as well as the necessity of compensating the power factor of the luminaire with a capacitor. The current flowing through the lamp is alternating with the mains frequency and my approximate harmonic shape. The fluorescent light therefore has a large alternating component. Other types of ballasts work with high frequency eg. 20 kHz. The lamp is energized with an inverter equipped with transistors.

These disadvantages are partially eliminated by the invention, which consists in a ballast consisting of a diode bridge consisting of four diodes whose one AC terminal is connected to the mains clamp and the other AC terminal is connected via a fluorescent lamp, to the other supply point, between the unidirectional terminals of this bridge is connected controller, eg. electronic direct current limiter in switch connection.

The solution according to the invention eliminates the main advantage of the choke ballast, a large consumption of material. It mainly uses semiconductor devices, diodes and transistors, and small ferrite reactor chokes because the ballast operates in a high switching frequency switching mode. The current flowing through the lamp is alternating at 50 Hz. However, its shape is controlled by the regulator so that it is close to the rectangular one. The light of the bulb therefore has an alternating component. The ease of wiring of the ballast according to the invention results in a reduction of the cost of the m compared to other semiconductor ballasts.

the operation of the ballast according to the projection is explained by means of a drawing.

To the clamps 1, 2 is connected the mains current. The mains current flows from the clamp 1 through the lamp and the diode 4 through the regulator 11 and the diode 6 and the clamp 2. In the opposite polarity the current path is: clamp 2, diode J, regulator diode 8, fluorescent lamp clamp 1. If the mains voltage is higher than the burning arc voltage in the lamp, the lamp current is regulated by regulator 2, e.g. an electronic limiter in the switch circuit connected between the unidirectional points 2, 10 of the diode bridge to a constant value.

Claims (1)

2 215237 compared to other semiconductor ballasts. The operation of the ballast according to the invention is explained by means of fattening. An electrical network is connected to the clamps 1, 2 The current from the mains flows from the clamp 1 through the fluorescent lamp J and the diode 4 is the regulator Feeding the diode 6 and the clamp 2. In the case of opposite polarity, the current path is: clamp 2, diode regulator diode 8 , fluorescent lamp of the clamp 1. If the voltage in the network is higher than the burning voltage of the arc in the fluorescent lamp, the current of the fluorescent lamp is regulated by the regulator 6, e.g., by an electronic limiter in a circuit switch connected by the intermediate diode point 10 to a constant value. OBJECT OF THE INVENTION The engagement of a fluorescent ballast is characterized in that the ballast consists of a diode bridge consisting of diode styles (4767778), one alternating solder / ll terminal of which is connected to the network conductor clamp (2) and the second alternating terminal is a connected fluorescent lamp (3) to the power cord clamp (1), whereby a controller (5) is connected between the one-way terminals / 9,10 / of this diode bridge, eg an electronic direct current limiter / 5 / in a switch connection.