公开(公告)号：US11043853B2

公开(公告)日：2021-06-22

申请号：US15981814

申请日：2018-05-16

Applicant: Apple Inc.

Inventor： Liang Chen ,  Andrew Gray ,  Arunim Kumar ,  Zachary Strachan Harris ,  Antoin J. Russell ,  Bharat K. Patel ,  Saining Ren ,  Jerald Polestico Guillermo ,  Ron Rafer Floresca

IPC: H02J50/60 ,  H02J7/02 ,  H04B5/00 ,  H02J50/12 ,  H02J50/40 ,  H02J50/10 ,  H02J7/00

Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using an output circuit that includes a wireless power transmitting coil. Measurement circuitry is coupled to the output circuit to help determine whether the wireless power receiving device is present and ready to accept transmission of wireless power. Oscillator circuitry for supplying signals to the output circuitry while making measurements with the measurement circuitry is coupled to the output circuit using an impedance injection network. The impedance injection network includes an inductor and a resistor coupled in series. Control circuitry opens a transistor in the output circuit when making measurements with the measurement circuitry and closes the transistor when transmitting the wireless power signals.

公开(公告)号：US20180337549A1

公开(公告)日：2018-11-22

申请号：US15981814

申请日：2018-05-16

Applicant: Apple Inc.

Inventor： Liang Chen ,  Andrew Gray ,  Arunim Kumar ,  Zachary Strachan Harris ,  Antoin J. Russell ,  Bharat K. Patel ,  Saining Ren ,  Jerald Polestico Guillermo ,  Ron Rafer Floresca

IPC: H02J7/02 ,  H04B5/00 ,  H02J50/12 ,  H02J50/60

Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using an output circuit that includes a wireless power transmitting coil. Measurement circuitry is coupled to the output circuit to help determine whether the wireless power receiving device is present and ready to accept transmission of wireless power. Oscillator circuitry for supplying signals to the output circuitry while making measurements with the measurement circuitry is coupled to the output circuit using an impedance injection network. The impedance injection network includes an inductor and a resistor coupled in series. Control circuitry opens a transistor in the output circuit when making measurements with the measurement circuitry and closes the transistor when transmitting the wireless power signals.

公开(公告)号：US20180337557A1

公开(公告)日：2018-11-22

申请号：US15967285

申请日：2018-04-30

Applicant: Apple Inc.

Inventor： Liang Chen ,  Andrew Gray ,  Arunim Kumar ,  Zachary Strachan Harris ,  Antoin J. Russell ,  Bharat K. Patel

IPC: H02J50/12 ,  G01R31/28 ,  G08B1/08 ,  H02J50/40 ,  H02J7/02 ,  H02J50/60

CPC classification number: H02J50/12 ,  G01R31/28 ,  G08B1/08 ,  H02J7/025 ,  H02J50/40 ,  H02J50/60

Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using output circuitry that includes an array of wireless power transmitting coils that form a wireless charging surface. During wireless power transmission operations, wireless power signals are transmitted from the array of coils to a wireless power receiving device on the charging surface. Inductance measurement circuitry such as impulse response measurement circuitry and other measurement circuitry is coupled to the output circuitry. Control circuitry in the wireless power transmitting device analyzes signals from the measurement circuitry to produce two-dimensional signal profiles across the wireless charging surface and to compare patterns in these signal profiles to predetermined signal patterns associated with the presence of known power receiving equipment on the wireless charging surface. Based on the analysis, charging parameters may be adjusted or other actions taken.

公开(公告)号：US10320241B2

公开(公告)日：2019-06-11

申请号：US15967285

申请日：2018-04-30

Applicant: Apple Inc.

Inventor： Liang Chen ,  Andrew Gray ,  Arunim Kumar ,  Zachary Strachan Harris ,  Antoin J. Russell ,  Bharat K. Patel

IPC: H02J50/40 ,  H02J50/12 ,  G01R31/28 ,  H02J50/60 ,  H02J7/02 ,  G08B1/08 ,  H02J50/90

Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using output circuitry that includes an array of wireless power transmitting coils that form a wireless charging surface. During wireless power transmission operations, wireless power signals are transmitted from the array of coils to a wireless power receiving device on the charging surface. Inductance measurement circuitry such as impulse response measurement circuitry and other measurement circuitry is coupled to the output circuitry. Control circuitry in the wireless power transmitting device analyzes signals from the measurement circuitry to produce two-dimensional signal profiles across the wireless charging surface and to compare patterns in these signal profiles to predetermined signal patterns associated with the presence of known power receiving equipment on the wireless charging surface. Based on the analysis, charging parameters may be adjusted or other actions taken.