公开(公告)号：US20200333387A1

公开(公告)日：2020-10-22

申请号：US16777768

申请日：2020-01-30

Applicant: Pi Inc.

Inventor： William Paul Abajian ,  Jules Marie Xavier Laffitte ,  John MacDonald ,  Viswajit Natarajan ,  Lixin Shi ,  Jake Lee Vander Ploeg ,  Xiaoping Zhu

IPC: G01R23/16 ,  H02J50/80 ,  H02J50/10 ,  H02J50/40 ,  H02J7/02

Abstract: A wireless charging system is configured to charge one or more receiver devices simultaneously. The wireless charging system includes multiple coils that may be driven independently based on a feedback system with one or more feedback channels. One of the feedback channels may be a voltage and/or current measurement of coil driving signals from the coils that are indicative of receiver device presences on the wireless charging system. A coil driving signal may be sampled and processed using discrete Fourier transform to determine amplitude and phase information of the signal.

公开(公告)号：US20190156985A1

公开(公告)日：2019-05-23

申请号：US16197284

申请日：2018-11-20

Applicant: Pi Inc.

Inventor： Nikola Popov ,  Lixin Shi

IPC: H01F27/24 ,  H03J3/02 ,  H01F27/28

Abstract: A tunable inductor has a first magnetic core and a second magnetic core wound with a direct current (DC) winding and an alternating current (AC) winding. A first portion of the AC winding is wound around a first portion of the first magnetic core, and a second portion of the AC winding is wound around a first portion of the second magnetic core. The DC winding is wound simultaneously around the first magnetic core and the second magnetic core in a second portion that does not overlap the first portion of the first magnetic core and the second magnetic core. The DC winding is connected to a DC control circuit that applies a DC voltage to control permeability of the first magnetic core and the second magnetic core, which allows inductance value of the tunable inductor to be adjusted.

公开(公告)号：US11031817B2

公开(公告)日：2021-06-08

申请号：US16777780

申请日：2020-01-30

Applicant: Pi Inc.

Inventor： William Paul Abajian ,  Jules Marie Xavier Laffitte ,  John MacDonald ,  Viswajit Natarajan ,  Lixin Shi ,  Xiaoping Zhu

IPC: H02J50/10 ,  H02J50/40 ,  H02J7/02 ,  H02J50/80 ,  G01R23/16 ,  H02J50/90 ,  H02J50/12 ,  H01F38/14 ,  H04B5/00

Abstract: A wireless charging system is configured to charge one or more receiver devices simultaneously. The wireless charging system includes a plurality of coils for wireless charging the one or more receiver devices. The wireless charging system may use a machine learning algorithm to detect the one or more receiver devices and select which of the multiple coils to activate for charging the multiple coils. Based on measurements made from signal through the coils within the wireless charging system, the machine learning algorithm determines a subset of the coils to activate for charging the detected one or more receiver devices.

公开(公告)号：US20200336018A1

公开(公告)日：2020-10-22

申请号：US16777780

申请日：2020-01-30

Applicant: Pi Inc.

Inventor： William Paul Abajian ,  Jules Marie Xavier Laffitte ,  John MacDonald ,  Viswajit Natarajan ,  Lixin Shi ,  Xiaoping Zhu

IPC: H02J50/40 ,  H02J50/90 ,  H04B5/00 ,  H02J50/80 ,  H01F38/14 ,  H02J50/12 ,  H02J7/02

Abstract: A wireless charging system is configured to charge one or more receiver devices simultaneously. The wireless charging system includes a plurality of coils for wireless charging the one or more receiver devices. The wireless charging system may use a machine learning algorithm to detect the one or more receiver devices and select which of the multiple coils to activate for charging the multiple coils. Based on measurements made from signal through the coils within the wireless charging system, the machine learning algorithm determines a subset of the coils to activate for charging the detected one or more receiver devices.

公开(公告)号：US20200336009A1

公开(公告)日：2020-10-22

申请号：US16777777

申请日：2020-01-30

Applicant: Pi Inc.

Inventor： William Paul Abajian ,  Jules Marie Xavier Laffitte ,  John MacDonald ,  Lixin Shi ,  Jake Lee Vander Ploeg ,  Xiaoping Zhu

IPC: H02J50/10 ,  H02J50/80 ,  H02J7/02 ,  H02J50/40

Abstract: A wireless charging system is configured to charge one or more receiver devices simultaneously. The wireless charging system includes multiple coils that may be driven independently based on a feedback system with one or more feedback channels. One of the feedback channels may be demodulated communication signals from the one or more receiver devices. The demodulation may be performed by a communication demodulation circuit with configurable gain. The demodulated communication signals are processed for error correction at a bit level and a packet level, which improves accuracy despite presence of multiple receiver devices and noisy conditions.

公开(公告)号：US20200336008A1

公开(公告)日：2020-10-22

申请号：US16777763

申请日：2020-01-30

Applicant: Pi Inc.

Inventor： William Paul Abajian ,  Jules Marie Xavier Laffitte ,  John MacDonald ,  Viswajit Natarajan ,  Christopher William Sarli ,  Lixin Shi ,  Jake Lee Vander Ploeg ,  Xiaoping Zhu ,  Mark Huan Mekkittikul

IPC: H02J50/10 ,  H02J50/40 ,  H02J7/02

Abstract: A wireless charging system is configured to charge one or more receiver devices simultaneously. The wireless charging system includes multiple coils that may be driven independently based on a feedback system with one or more feedback channels. Each coil is driven by a coil driving signal selected based on a set of target characteristics. A coil drive circuit receives an input of a pulse width modulation (PWM) signal and outputs the coil driving signal to a corresponding coil.