Lamp unit power supply system
AssigneeTridonic UK Ltd
InventorIan Wilson
Life of this patent
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Abstract
A power supply system for illuminating an LED lamp unit, having a normal mode of operation in which a mains input of a driver of the LED lamp unit is supplied by mains power, and an emergency mode of operation, in which the LED lamp unit is supplied by a charge storage device, is disclosed. The system includes an emergency mode converter operable to step-up the voltage from the charge storage device and to supply the mains driver input for illuminating the LED lamp unit.
Claims21
A power supply system, for illuminating an LED lamp unit (5), having an emergency mode of operation, in which the LED lamp unit (5) is supplied by a charge storage device (119), the system comprising:
- an emergency mode converter (121) configured to step-up a voltage from the charge storage device (119) and to supply an input (4) for illuminating the LED lamp unit (5), wherein the emergency mode converter (21) comprises a flyback or a forward converter and provides galvanic isolation of the charge storage device (19) from the LED lamp unit (5);
- and
- a battery charger (117) comprising a flyback converter, which charges the charge storage device (119) and provides galvanic isolation between an AC mains supply (1) and the charge storage device (119).
A power supply system, for illuminating an LED lamp unit (5), having an emergency mode of operation, in which the LED lamp unit (5) is supplied by a charge storage device (119), the system comprising:
- an emergency mode converter (121) configured to step-up a voltage from the charge storage device (119) and to supply an input (4) for illuminating the LED lamp unit (5), wherein the emergency mode converter (121) comprises a flyback or a forward converter and provides galvanic isolation of the charge storage device (119) from the LED lamp unit (5);
- and
- a battery charger (117) comprising a flyback converter, which charges the charge storage device (119) and provides galvanic isolation between an AC mains supply (1) and the charge storage device (119), wherein a discharge current of the charge storage device (119) is fixed or is dependent on a given curve depending on a voltage or status of the charge storage device (119).
A power supply system, for illuminating an LED lamp unit (5), having an emergency mode of operation, in which the LED lamp unit (5) is supplied by a charge storage device (119), the system comprising:
- an emergency mode converter (121) configured to step-up a voltage from the charge storage device (119) and to supply an input (4) for illuminating the LED lamp unit (5), wherein the emergency mode converter (121) comprises a flyback or a forward converter and provides galvanic isolation of the charge storage device (119) from the LED lamp unit (5);
- and
- a battery charger (117) comprising a flyback converter, which charges the charge storage device (119) and provides galvanic isolation between an AC mains supply (1) and the charge storage device (119), wherein a current or power drawn from the charge storage device (119) is adjustable to a fixed value.
Dependencies are inferred from the claim text.