Title:
METHOD AND DEVICE FOR OPERATING A GAS DISCHARGE LAMP
Document Type and Number:
WIPO Patent Application WO/2012/083323
Kind Code:
A3
Abstract:
The invention relates to a method and a device for operating a gas discharge lamp 1. The gas discharge lamp 1 is operated with an alternating voltage, and a DC component of the current flowing through the gas discharge lamp 1 can be adjusted. For this purpose, a direct or indirect measurement of the DC component is carried out, and the DC component is changed on the basis of the measurement. The change of the DC component can be implemented by adjusting the amplitude and/or the polarity of an asymmetry of duty cycles d1, d2 of two digital control signals 2a, 2b for two inverter 3 semiconductor circuit breakers 3a, 3b that are connected to a half bridge in series, said inverter supplying the gas discharge lamp 1 with alternating voltage. The DC component can be changed dependent on the set dimming level, the lamp type, the ambient temperature, or other operating parameters, or the DC component can be adjusted to a reference value. The reference value can be determined from a reference curve and can be adjusted on the basis of one or more curve sets that describe the DC component at least dependent on the dimming level and the amplitude and/or polarity of the asymmetry.
Inventors:
MAYRHOFER MARKUS (AT)
Application Number:
PCT/AT2011/000503
Publication Date:
August 23, 2012
Filing Date:
December 21, 2011
Export Citation:
Assignee:
TRIDONIC GMBH & CO KG (AT)
MAYRHOFER MARKUS (AT)
MAYRHOFER MARKUS (AT)
International Classes:
H05B41/392
Foreign References:
| DE102006043155A1 | 2008-03-27 | |||
| US5001386A | 1991-03-19 | |||
| EP0765107A1 | 1997-03-26 |
Other References:
PERDIGAO M S ET AL: "Using Magnetic Regulators for the Optimization of Universal Ballasts", IEEE TRANSACTIONS ON POWER ELECTRONICS, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 23, no. 6, 1 November 2008 (2008-11-01), pages 3126 - 3134, XP011239865, ISSN: 0885-8993, DOI: 10.1109/TPEL.2008.2005060
MARCOS ALONSO J ET AL: "Investigation of a New Control Strategy for Electronic Ballasts Based on Variable Inductor", IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, IEEE SERVICE CENTER, PISCATAWAY, NJ, USA, vol. 54, no. 1, 1 January 2008 (2008-01-01), pages 3 - 10, XP011199589, ISSN: 0278-0046, DOI: 10.1109/TIE.2007.896033
MARCOS ALONSO J ET AL: "A Novel Single-Stage Constant-Wattage High-Power-Factor Electronic Ballast", IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, IEEE SERVICE CENTER, PISCATAWAY, NJ, USA, vol. 46, no. 6, 1 December 1999 (1999-12-01), pages 1148 - 1158, XP011023596, ISSN: 0278-0046
MARCOS ALONSO J ET AL: "Investigation of a New Control Strategy for Electronic Ballasts Based on Variable Inductor", IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, IEEE SERVICE CENTER, PISCATAWAY, NJ, USA, vol. 54, no. 1, 1 January 2008 (2008-01-01), pages 3 - 10, XP011199589, ISSN: 0278-0046, DOI: 10.1109/TIE.2007.896033
MARCOS ALONSO J ET AL: "A Novel Single-Stage Constant-Wattage High-Power-Factor Electronic Ballast", IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, IEEE SERVICE CENTER, PISCATAWAY, NJ, USA, vol. 46, no. 6, 1 December 1999 (1999-12-01), pages 1148 - 1158, XP011023596, ISSN: 0278-0046
Attorney, Agent or Firm:
BARTH, Alexander (Färbergasse 15, Dornbirn, AT)
Download PDF: