Low-pressure discharge lamp, particularly fluorescent lamp high-

Details Low-pressure discharge lamp, particularly fluorescent lamp high- Low-pressure discharge lamp, particularly fluorescent lamp high-

1987-07-06

1989-02-28

Moore, David K.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

With power factor control device

315224, 315244, 315DIG5, 363 39, 363 48, 363 40, H05B 4129, H02M 112, H02M 7538

Patent

active

048088870

ABSTRACT:
To reduce network harmonics upon connecting a fluorescent lamp (LP1) with a power network rectifier (2) and a push-pull frequency generator (3) and a series resonance circuit (4) to the network, a harmonic filter is connected in the circuit with the fluorescent lamp (LP1) or lamps (LP1, LP2). The harmonic filter includes two diodes (D8, D9), connected in forward current passing direction to the power rectifier (2), and two capacitors (C7, C8) connected, respectively, between the serially connected diodes and a center tap (M1) between the push-pull transistors directly and beyond an inductance forming part of a series resonance circuit (4) for the lamps. In parallel to the two diodes, two further diodes (D10, D11) are provided, having a center tap (M4) which is connected over a capacitor (C9) also to the center tap between the transistors of the push-pull frequency generator (3). Preferably, the capacity value of the further capacitor (C9) is about 0.2 times the total capacity value in the harmonic filter circuit.

REFERENCES:
patent: 4277726 (1981-07-01), Burke
patent: 4388562 (1983-06-01), Josephson
patent: 4398126 (1983-08-01), Zuchtriegel
patent: 4438371 (1984-03-01), Zuchtriegel
patent: 4438372 (1984-03-01), Zuchtriegel
patent: 4481460 (1984-11-01), Kroning et al.
patent: 4511823 (1985-04-01), Eaton et al.
patent: 4553070 (1985-11-01), Sairanen et al.
patent: 4562527 (1985-12-01), Klamt
patent: 4572989 (1986-02-01), Zuchtriegel
patent: 4684851 (1987-08-01), Van Meurs
patent: 4710682 (1987-12-01), Zuchtriegel
Sipmos Transistors, Siemens Application Notes 1983, Chapter 1.9 "Electronic allast for Fluorescent Lamps" pp. 34 et seq.
Elektronik-Schaltungen (Electronic Circuits) by Waltr Hirschmann Publish by Siemens AG, Chapter B3.12.

Affiliated with

Also associated with

Rating

Low-pressure discharge lamp, particularly fluorescent lamp high- does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low-pressure discharge lamp, particularly fluorescent lamp high-, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low-pressure discharge lamp, particularly fluorescent lamp high- will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1370323