公开(公告)号：US12212177B2

公开(公告)日：2025-01-28

申请号：US17763082

申请日：2021-04-16

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

Inventor： Junjun Deng ,  Zhenpo Wang ,  Qianning Mao ,  Shuo Wang

IPC: H02J7/00 ,  B60L53/12 ,  B60L53/60 ,  H02J7/02 ,  H02J50/12 ,  H02M1/42 ,  H02M3/335

Abstract: A method and a system for adjusting a double-sided LCC compensation network of a wireless charging system are provided. The method includes: obtaining a standard coupling coefficient, a rated operating frequency, and rated parameter values of compensation elements in the wireless charging system; determining change rates of output performance of the wireless charging system; determining an adjustable compensation element; obtaining a real-time coupling coefficient between the primary-side transmitting coil and the secondary-side receiving coil; determining whether the real-time coupling coefficient is less than a coupling coefficient threshold; and adjusting an operating frequency of the wireless charging system when the real-time coupling coefficient is not less than the coupling coefficient threshold; or adjusting both an operating frequency of the wireless charging system and the adjustable compensation element when the real-time coupling coefficient is less than the coupling coefficient threshold.

公开(公告)号：US11870335B2

公开(公告)日：2024-01-09

申请号：US17910683

申请日：2021-04-16

Applicant: Beijing Institute of Technology

Inventor： Junjun Deng ,  Zhenpo Wang ,  Na Fu ,  Shuo Wang

IPC: H02M1/08 ,  H02J50/12 ,  H02M3/335 ,  H02M1/00

CPC classification number: H02M1/083 ,  H02J50/12 ,  H02M1/0058 ,  H02M3/33573 ,  H02J2207/20

Abstract: A wireless power transfer (WPT) system regulation method and system for implementing zero voltage switching (ZVS) in a wide power range are provided. The method includes: determining, according to a topology structure of a WPT system and based on a linear state equation, a phase -shift angle boundary and a switching frequency boundary of an inverter that meet ZVS; fixing a switching frequency at a resonance frequency of the WPT system, and determining, in a phase -shift manner, a phase-shift range and a corresponding first voltage output range for implementing ZVS; determining a frequency variation range of a frequency modulation method; determining an optimal switching frequency based on corresponding switching frequencies and phase-shift angles that meet ZVS at different expected output voltages of the WPT system; determining a second voltage output range for implementing ZVS at the optimal switching frequency; and regulating the WPT system by using different regulation methods.

公开(公告)号：US20230198374A1

公开(公告)日：2023-06-22

申请号：US17910683

申请日：2021-04-16

Applicant: Beijing Institute of Technology

Inventor： Junjun Deng ,  Zhenpo Wang ,  Na Fu ,  Shuo Wang

IPC: H02M1/08 ,  H02J50/12 ,  H02M1/00 ,  H02M3/335

CPC classification number: H02M1/083 ,  H02J50/12 ,  H02M1/0058 ,  H02M3/33573 ,  H02J2207/20

Abstract: A wireless power transfer (WPT) system regulation method and system for implementing zero voltage switching (ZVS) in a wide power range are provided. The method includes: determining, according to a topology structure of a WPT system and based on a linear state equation, a phase-shift angle boundary and a switching frequency boundary of an inverter that meet ZVS; fixing a switching frequency at a resonance frequency of the WPT system, and determining, in a phase-shift manner, a phase-shift range and a corresponding first voltage output range for implementing ZVS; determining a frequency variation range of a frequency modulation method; determining an optimal switching frequency based on corresponding switching frequencies and phase-shift angles that meet ZVS at different expected output voltages of the WPT system; determining a second voltage output range for implementing ZVS at the optimal switching frequency; and regulating the WPT system by using different regulation methods.