GE compact induction fluorescent lamps. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Electrodeless induction fluorescent lamps. GE compact induction fluorescent lamps. Encyclopedia of radio electronics and electrical engineering

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The next stage in the development of ILL was the creation in 1994 by GE Lighting of a compact lamp of the type Genura, in which, thanks to the achievements of modern microelectronics, the RF generator was placed in the lamp base.

Unlike QL, Genura belongs to the group of compact LLs (the RF generator is located in the lamp base) and is designed to directly replace standard incandescent lamps.

On fig. 2.18 shows the equivalent replacement of a reflector lamp with an incandescent lamp with a non-electrode ILL Genura.

Replacing the LN with a Genura lamp saves energy by 4-5 times and increases the service life by 10-15 times. Thus, the economic effect of replacing R80-type LL with Genura lamps (with a high initial cost of a Genura lamp - about $ 25) is achieved after 8 months; and during the entire service life (15 thousand hours) operation of 100 pcs. Genura lamps provide total savings of over $20000. Genura's guaranteed lamp life is modestly stated by GE Lighting as 15000 hours, referring to the IEC 969 standard.

GE compact induction fluorescent lamps
Rice. 2.18. Replacement of LN with ILL Genura in a reflector lamp

In terms of bulb shape and overall dimensions, the Genura™ R80 lamp corresponds to a mirror LN type R80 (100 W). A transistor generator with a frequency of 2,5 MHz is placed in the base of the lamp, consuming 23 W from an alternating current network with a voltage of 230 V. The bulb of the Genura lamp is coated from the inside with a Polylux brand phosphor and filled with xenon with a small amount of mercury. The internal structure of the Genura lamp is shown in fig. 2.19.

The location of the inductor with a ferrite core inside the lamp bulb corresponds to the design of an electrodeless ILL of the QL type. The fact that the RF generator is located in the lamp itself limits its power and service life, which is mainly determined by the thermal and radiation resistance of the transistor generator. The shielding effect of a weak RF discharge is apparently considered insufficient, and in order to reduce the level of electromagnetic radiation from the inductor, a conductive coating of a thin film of zinc oxide is applied on the bulb surface under the phosphor layer.

GE compact induction fluorescent lamps
Rice. 2.19. The internal structure of the Genura lamp

The Genura-type ILL is equipped with a reflector made of white polypropylene of the Valox brand, which retains its shape when the temperature changes from -20 °C to +120 °C. Specifications ILL Genura are given in table. 2.33, and in fig. 2.20 shows the overall dimensions of this lamp.

GE compact induction fluorescent lamps
Rice. 2.20. Overall dimensions of ILL Genura

Table 2.33. Specifications ILL Genura

GE compact induction fluorescent lamps

Author: Koryakin-Chernyak S.L.

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