Circuit arrangement for operating electrical lamps

Details Circuit arrangement for operating electrical lamps Circuit arrangement for operating electrical lamps

1999-05-12

2000-11-07

Wong, Peter S.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363132, 323905, 315224, H02M 112, H02M 114

Patent

active

061445681

ABSTRACT:
The invention relates to a circuit arrangement for operating electrical lamps which encompasses an invertor (WR) with oscillation build-up circuit (trigger generator), comprising diac (DC1) and drive circuit. The drive circuit comprises a high-pass filter, in particular an RC high-pass filter (R1, C1). As a result, the trigger initiation is shifted closer to the zero crossing of the supply voltage. This means, in turn, that a more sinusoidal power supply current consumption with a smaller proportion of harmonics is obtained. In addition, more stable lamp operation is achieved in combination with power supply segment control dimmers.

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patent: 4528456 (1985-07-01), Harris
patent: 4862041 (1989-08-01), Hirschmann
patent: 4949013 (1990-08-01), Zuchtriegel
patent: 4954768 (1990-09-01), Luchaco et al.
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patent: 5394062 (1995-02-01), Minarczyk et al.
patent: 5740021 (1998-04-01), Lecheler et al.
Douglas Thom, "Capacitor drops voltage with little heat for low cost, low ltage power supply", Electronic Design, p. 148, Nov. 1975.
Hirschmann, Hauenstein, Schaltnetzteile, Siemens AG, 1990, p. 102.
H.-J. Mayer, Stromversorgungen fuer die Praxis, Vogel Buchverlag, Wurzburg, 1989, p. 115-116.

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