Resonanter Hybrid-Flyback-Wandler für eine Lichtquelle und Leuchte
Anmelder: Tridonic GmbH & Co. KG 🇦🇹
Details
- Veröffentlichungs-Nr.
- EP4535632
- Aktenzeichen
- EP23201763
- Anmeldetag
- 5. Oktober 2023
- Veröffentlichung
- 9. April 2025
- Rechtsraum
- EP
- IPC
- H02M1/00H02M3/00H02M3/335
Abstract
Disclosed is a resonant hybrid flyback converter (1) for a light source (4). The converter (1) comprises a transformer (101, 102), comprising a primary-side inductance (101, L<sub>p</sub>) and a secondary-side inductance (102, L<sub>s</sub>); a high-side switch (104) and a low-side switch (105), connected in series between an input electric potential and a primary-side ground electric potential of the converter (1); a resonant tank circuit (101, 101", 106), connected in series between a common electric potential of the switches (104, 105) and the primary-side ground electric potential, wherein the resonant tank circuit (101, 101", 106) comprises the primary-side inductance (101, L<sub>p</sub>). The converter (1) further comprises a current sensing circuit, configured to sense a positive peak current (301, I<sub>magpos</sub>) through the primary-side inductance (101, L<sub>p</sub>); a voltage sensing circuit (103, 107-110), configured to sense a voltage (302, V<sub>Lmsec</sub>; 302', V<sub>Lmpri</sub>) across an inductance (101, 102) of the transformer (101, 102); and a control circuit, configured to estimate a current (303, I<sub>LEDest</sub>) through the light source (4) in accordance with the positive peak current (301, I<sub>magpos</sub>) through the primary-side inductance (101, L<sub>p</sub>) and the voltage (302, V<sub>Lmsec</sub>; 302', V<sub>Lmpri</sub>) across the inductance (101, 102) of the transformer (101, 102); and regulate the current (305, I<sub>LED</sub>) through the light source (4) in accordance with a setpoint value (304, I<sub>LEDref</sub>) and the estimated current (303, I<sub>LEDest</sub>) through the light source (4). This avoids a sensing of the current (305, I<sub>LED</sub>) through the light source (4) and an associated signal transfer across a SELV barrier of the converter (1).
Anmelder
- Firma
- Tridonic GmbH & Co. KG
- Land
- 🇦🇹 Österreich
Österreichisches Unternehmen, das Komponenten und Systeme für LED-Beleuchtung und Lichtsteuerung für Innenräume entwickelt und herstellt.
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Fachgebiete
Mitscherlich wurde 1896 in Berlin gegründet und zog 1951 nach München, direkt in Nähe zu Europäischem Patentamt, DPMA, Bundespatentgericht und der Münchner UPC-Lokalkammer. Sie legt Wert auf Kontinuität und betreut manche Mandate seit Jahrzehnten.