Back to results
US 8,710,757 B2Granted
Power converter for an LED assembly and lighting application
AssigneeEldolab Holding B.V.
InventorPetrus Johannes Maria Welten
Life of this patent
Estimating the term…
Abstract
The present invention relates to a power converter for an LED assembly, the power converter comprising—a switched mode power supply arranged to power the LED assembly, an AC/DC converter arranged to provide a DC supply voltage to the switched mode power supply, a control unit arranged to receive an input signal representing a required load voltage for powering the LED assembly, the control unit being arranged to control the AC/DC converter based on the input signal.
Claims14
A power converter for an LED assembly, the power converter comprising:
- a switched mode power supply arranged to power the LED assembly;
- an AC/DC converter arranged to provide a variable DC supply voltage to the switched mode power supply;
- and
- powering the LED assembly, the control unit being arranged to control the AC/DC converter, in accordance with the required load voltage;
- wherein the control unit is arranged to control the AC/DC converter to provide the variable DC supply voltage at a level substantially matching or proportional to the required load voltage;
- wherein the AC/DC converter comprises
- a transformer arranged to provide a variable AC output voltage based on a control signal from the control unit;
- and
- a first rectifier for converting the variable AC voltage to the variable DC supply voltage;
- and
- wherein the transformer comprises a primary winding having multiple terminals connectable to an AC power source via a selector element, said selector element being controlled by the control signal of the control unit, and a secondary winding connected to the first rectifier.
8 more elements
A power converter for an LED assembly, the power converter comprising:
- a switched mode power supply arranged to power the LED assembly;
- an AC/DC converter arranged to provide a variable DC supply voltage to the switched mode power supply;
- and
- powering the LED assembly, the control unit being arranged to control the AC/DC converter, in accordance with the required load voltage;
- wherein the AC/DC converter comprises a transformer arranged to provide a variable AC output voltage based on a control signal from the control unit, the transformer comprising
- a primary winding having multiple terminals connectable to an AC power source via a selector element, said selector element being controlled by the control unit;
- and
- a plurality of secondary windings, each secondary winding being provided with a first rectifier for, in use, converting the variable AC voltage over the secondary winding to the variable DC supply voltage.
5 more elements
Dependencies are inferred from the claim text.