Large area wireless power transfer system

Patent metadata

Field	Value
Publication number	US-12549034-B2
Application number	US-202418755368-A
Country	US
Kind code	B2
Filing date	Jun 26, 2024
Priority date	Nov 3, 2021
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A system for wireless power transfer includes a wireless transmission system and a wireless receiver system. The wireless transmission system includes a transmission antenna configured to transmit one or both of wireless power signals and wireless data signals within a large charge area, the large charge area having a length of in a range of 50 millimeters (mm) to 300 mm and a width in a range of 150 to 500 mm. The wireless receiver system includes a receiver antenna, the receiver antenna including a plurality of receiver coils, each of the plurality of receiver coils configured to receive one or both of the wireless power signals and the wireless data signals within the large charge area.

First claim

The invention claimed is:

1 . A system for large area wireless power transfer, the system comprising:
a wireless transmission system comprising:
a transmission circuit configured to generate an AC signal; and
a transmission antenna configured to transmit a wireless power signal within a charge area, the transmission antenna comprising:
a source coil comprising one or more first outer turns and one or more first inner turns, the source coil electrically connected to the transmission circuit, which provides the generated AC signal to the source coil thereby causing the source coil to transmit the wireless power signal, the source coil disposed such that a source current flows in a first direction through the one or more first outer turns and a second direction through the one or more first inner turns, the second direction substantially opposite of the first direction; and
an internal repeater coil positioned adjacent to the source coil and configured to relay the wireless power signal from the source coil, the internal repeater coil comprising one or more second outer turns and one or more second inner turns, the internal repeater coil disposed such that a repeater current flows in a third direction through the one or more second outer turns and a fourth direction through the one or more second inner turns, the third direction substantially opposite of the fourth direction; and

a wireless receiver system configured to power a load, the wireless receiver system comprising:
a receiver antenna comprising a plurality of receiver coils each comprising a multi-layer multi-turn receiver coil, wherein each of the plurality of receiver coils is configured to receive the wireless power signal within the charge area; and
a receiver circuit electrically connected to the receiver antenna and configured to (i) receive an induced AC signal that is based on the received wireless power signal and (ii) based on the induced AC signal, generate a direct current (DC) power signal.

2 . The system of claim 1 , wherein each multi-layer multi-turn receiver coil of the plurality of receiver coils comprises two or more layers and two or more turns.

3 . The system of claim 1 , wherein each multi-layer multi-turn receiver coil of the plurality of receiver coils comprises two layers and at least 5 turns.

4 . The system of claim 1 , wherein the source coil comprises a first conductive trace that forms a first multi-layer multi-turn inductor structure having two layers, the one or more first outer turns comprise at least two first outer turns, and the one or more first inner turns comprise at least three first inner turns.

5 . The system of claim 1 , wherein the internal repeater coil comprises a second conductive trace that forms a second multi-layer multi-turn inductor structure having two layers, the one or more second outer turns comprise at least two second outer turns, and the one or more second inner turns comprise at least three second inner turns.

6 . The system of claim 1 , wherein the source coil and the internal repeater coil each comprise conductive materials arranged in a pattern via additive manufacturing on a single substrate.

7 . The system of claim 1 , wherein the internal repeater coil comprises a repeater tuning system external to the internal repeater coil.

8 . The system of claim 1 , wherein the source coil comprises a first inter-turn capacitor, and
wherein the internal repeater coil comprises a second inter-turn capacitor.

9 . The system of claim 8 , wherein the first inter-turn capacitor is external of the source coil and the second inter-turn capacitor is external to the internal repeater coil.

10 . The system of claim 1 , wherein the internal repeater coil comprises a repeater filter external to the internal repeater coil.

11 . The system of claim 10 , wherein the repeater filter comprises at least on inductor, at least one capacitor, or combinations thereof.

12 . The system of claim 1 , wherein the transmission circuit comprises at least one sensor; and
a demodulation circuit, wherein the at least one sensor is configured to determine information associated with the wireless power signals, at the source coil.

13 . The system of claim 1 , wherein the transmission circuit comprises at least one sensor and a demodulation circuit, the at least one sensor configured to determine information associated with the wireless power signals, at the internal repeater coil.

14 . The system of claim 1 , wherein the transmission circuit comprises:
a first sensor configured to determine first information associated with the wireless power signals, at the source coil; a first demodulation circuit associated with the first sensor; a second sensor configured to determine second information associated with the wireless power signals, at the internal repeater coil; a second demodulation circuit associated with the second sensor; and a summing amplifier for summing output of the first and second demodulation circuits.

15 . The system of claim 1 , wherein the receiver circuit comprises a plurality of rectifiers, each of the plurality of rectifiers operatively associated with one of the plurality of receiver coils.

16 . The system of claim 1 , wherein the receiver circuit comprises a plurality of modulation circuits, each of the plurality of modulation circuits operatively associated with one of the plurality of receiver coils.

17 . A wireless transmission system comprising:
a transmission circuit configured to generate an AC signal; and a transmission antennaconfigured to wirelessly transmit a wireless power signal within a charge area, the transmission antenna comprising:
a source coil comprising one or more first outer turns and one or more first inner turns, the source coil electrically connected to the transmission circuit, which provides the generated AC signal to the source coil thereby causing the source coil to transmit the wireless power signal, the source coil disposed such that a source current flows in a first direction through the one or more first outer turns and a second direction through the one or more first inner turns, the second direction substantially opposite of the first direction; and
an internal repeater coil positioned adjacent to the source coil and configured to relay the wireless power signal from the source coil, the internal repeater coil comprising one or more second outer turns and one or more second inner turns, the internal repeater coil disposed such that a repeater current flows in a third direction through the one or more second outer turns and a fourth direction through the one or more second inner turns, the third direction substantially opposite of the fourth direction.

18 . The wireless transmission system of claim 17 , wherein the source coil and the internal repeater coil each comprise conductive materials arranged in a pattern via additive manufacturing on a single substrate.

19 . The system of claim 17 , wherein the source coil comprises a first conductive trace that forms a first multi-layer multi-turn inductor structure having two layers, the one or more first outer turns comprise at least two first outer turns, and the one or more first inner turns comprise at least three first inner turns; and
wherein the internal repeater coil comprises a second conductive trace that forms a second multi-layer multi-turn inductor structure having two layers, the one or more second outer turns comprise at least two second outer turns, and the one or more second inner turns comp

Assignees

• Nucurrent Inc

Inventors

• Yoon Andy
• Peralta Alberto
• Oleksiewicz Anna
• Dayerizadeh Alireza
• Katz Michael
• Alam Md Nazmul
• Halyal Pratik

Classifications

• H02J2105/44

  Portable electronic devices · CPC title

• H02J50/12

  of the resonant type · CPC title

• H02J50/502

  the energy repeater being integrated together with the emitter or the receiver · CPC title

• G06F3/03543 Primary

  Mice or pucks (G06F3/03541 takes precedence) · CPC title

• G06F3/0395

  Mouse pads · CPC title