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US 11,563,337 B2Granted
High efficiency wireless charging system and method
AssigneeNuVolta Technologies (Hefei) Co., Ltd.
InventorsDongdong Yuan, Sichao Liu
Life of this patent
Estimating the term…
Abstract
A system includes a receiver coil configured to be magnetically coupled to a transmitter coil, a rectifier connected to the receiver coil, a first stage and a second stage connected in cascade between the rectifier and a load and a bias voltage source configured to be connected with a first voltage node through a first switch and a second voltage node through a second switch, wherein one of the first voltage node and the second voltage node supplies power to the bias voltage source.
Claims20
An apparatus comprising:
- a rectifier configured to convert an alternating current voltage into a direct current voltage;
- a first stage and a second stage connected in cascade between the rectifier and a load;
- and
- a bias voltage source coupled to the rectifier through a first linear regulator and a first switch, and coupled to the load through a second switch.
1 more element
A method comprising:
- detecting an output voltage of a wireless charging system, wherein the wireless charging system comprises a rectifier, a first power stage and a second power stage connected in cascade, and wherein an output of the wireless charging system is configured to be connected to a battery;
- connecting a bias voltage source of the wireless charging system to a voltage potential higher than the output voltage of the wireless charging system when the output voltage of the wireless charging system is less than a first predetermined threshold;
- and
- connecting the bias voltage source of the wireless charging system to the output voltage of the wireless charging system when the output voltage of the wireless charging system is greater than the first predetermined threshold.
1 more element
A system comprising:
- a receiver coil configured to be magnetically coupled to a transmitter coil;
- a rectifier connected to the receiver coil;
- a first stage and a second stage connected in cascade between the rectifier and a load;
- and
- a bias voltage source configured to be connected with a first voltage node through a first switch and a second voltage node through a second switch, wherein one of the first voltage node and the second voltage node supplies power to the bias voltage source.
2 more elements
Dependencies are inferred from the claim text.