Jacob E Mattingley

US Patent:

20200076244, Mar 5, 2020

Filed:

Nov 30, 2018

Appl. No.:

16/206758

Inventors:

- Cupertino CA, US
Behrooz Shahsavari - Hayward CA, US
Jacob E. Mattingley - Cupertino CA, US
Joseph C. Doll - Mountain View CA, US
Steven P. Hotelling - Los Gatos CA, US
Siddharth Seth - Campbell CA, US
Douglas J. Adams - Mountain View CA, US
Michael A. Cretella - San Jose CA, US

International Classification:

H02J 50/60
H02J 7/02
H02J 50/12
H01F 38/14
G01K 1/14
G01V 9/00
G01K 1/02

Abstract:

A wireless power transmitting device transmits wireless power signals to a wireless power receiving device. The wireless power receiving device has a rectifier and a wireless power receiving coil that receives wireless power signals. The wireless power transmitting device uses a layer of coils to transmit the wireless power signals. A dielectric layer in the wireless power transmitting device defines a charging surface that receives the wireless power receiving device. A layer of temperature sensors is interposed between the layer of coils and the dielectric layer. Control circuitry in the wireless power transmitting device uses temperature information from the temperature sensors to determine whether a foreign object such as a coin is present on the charging surface.

US Patent:

20190081516, Mar 14, 2019

Filed:

Jan 19, 2018

Appl. No.:

15/875127

Inventors:

- Cupertino CA, US
Weiyu Huang - Santa Clara CA, US
Sneha Kadetotad - Cupertino CA, US
Baboo V. Gowreesunker - San Francisco CA, US
Jacob Mattingley - Cupertino CA, US

International Classification:

H02J 50/60
H02J 7/02
H02J 50/12
H02J 50/40
G01R 27/26

Abstract:

A wireless power transmission system has a wireless power receiving device that is located on a charging surface of a wireless power transmitting device. The wireless power receiving device has a wireless power receiving coil and the wireless power transmitting device has a wireless power transmitting coil array. Signal measurement circuitry coupled to the coil array may make measurements while the control circuitry uses the inverter circuitry to apply excitation signals to each of the coils. Foreign objects on the coil array such as metallic objects without wireless power receiving coils can be detected using foreign object detection. When multiple wireless power receiving devices are present on the wireless power transmitting device, steps may be taken to isolate measurements from the coils associated with each wireless power receiving device. Foreign object detection may then be performed on these modified measurements.