Electronic ballasts designed to operate with high power fluorescent lamps. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Electronic ballasts on discrete elements. Electronic ballasts designed to operate with high power fluorescent lamps. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Ballasts for fluorescent lamps

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The following options for electronic ballasts are designed to work with more powerful LLs, the power of which from 18 to 36 W. There are options that work for both one and two LLs.

On fig. 3.40 shows a circuit diagram of the device, and in fig. 3.41 - printed circuit board with the arrangement of elements.

It should be noted that in pursuit of reducing the cost of electronic ballast, Chinese manufacturers have excluded the noise suppression filter and fuse.

The filter capacitor C1 has a minimum value at which the device is still operational. This circuit is a classic example of an electronic ballast, clearly showing how, with a minimum number of inexpensive elements, you can make the LL glow.

It should be noted that during the operation of the ring LL with this ballast, the lamp failed for six months (one of the glows broke off). But the performance of the LL was restored by installing an additional 10 Ohm 5 W wire resistor instead of the broken electrode.

Electronic ballasts designed to operate with high power fluorescent lamps
Rice. 3.40. Schematic diagram of LUXOR electronic ballast

Electronic ballasts designed to operate with high power fluorescent lamps
Rice. 3.41. Circuit board and layout of LUXOR ballast elements

Some Chinese manufacturers use low-power transistors in electronic ballasts with a declared power of 40 W. On fig. 3.42, and shows the appearance of such a ballast.

Author: Koryakin-Chernyak S.L.

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