Improvements relating to power adaptors
First Claim
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1. A power adaptor comprising:
- an input for connection to an AC power supply;
an output for connection to a load; and
a resonant circuit coupled to the input that provides power to the output suitable for driving the load;
wherein the power adaptor includes a controller adapted to drive the resonant circuit in two or more different modes to select different characteristics of a current drawn from the AC power supply, in use;
wherein the controller is adapted to detect a power reducing of the AC power supply and select a pre-determined current profile for determining the characteristics of the current to be drawn from the AC power supply.
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Abstract
A power adaptor including an input for connection to an AC power supply, an output for connection to a load, and a resonant circuit coupled to the input that provides power to the output suitable for driving the load, is provided. The resonant circuit has two or more resonant frequencies, which are not harmonics of each other. The power adaptor includes a controller adapted to drive the resonant circuit at, or near, each of the two or more resonant frequencies to select different characteristics of the current drawn from the AC power supply, in use.
60 Citations
24 Claims
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1. A power adaptor comprising:
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an input for connection to an AC power supply; an output for connection to a load; and a resonant circuit coupled to the input that provides power to the output suitable for driving the load; wherein the power adaptor includes a controller adapted to drive the resonant circuit in two or more different modes to select different characteristics of a current drawn from the AC power supply, in use; wherein the controller is adapted to detect a power reducing of the AC power supply and select a pre-determined current profile for determining the characteristics of the current to be drawn from the AC power supply. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A power adaptor comprising:
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an input for connection to an AC power supply including a power reducing device; an output for connection to a load; an energy storage device coupled to the input; and a resonant circuit coupled to the input that provides power to the output suitable for driving the load; wherein the power adaptor includes a controller adapted to detect activation of a switch in the power reducing device of the AC power supply and reduce a current drawn from the AC power supply to deactivate the switch, the energy storage device providing power to the output in a period during which the switch of the power reducing device is deactivated.
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24. A power adaptor comprising:
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an input for connection to an AC power supply; an output for connection to a load; and a resonant circuit coupled to the input that provides power to the output suitable for driving the load, the resonant circuit having two or more resonant frequencies, which are not harmonics of each other; wherein the power adaptor includes a controller adapted to drive the resonant circuit at, or near, each of the two or more resonant frequencies to select different characteristics of the current drawn from the AC power supply, in use.
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Specification