Wireless Power Systems for Mobile Devices Supporting Inductive and Resonant Operating Modes

A novel multi-level phase-controlled resonant inverter with common mode capacitor for wireless EV chargers

“…The fundamental components of the voltages vplt) and VP2 (t) can be stated in the phasor domain as (4) where fJ is the angle of the second inverter that indicates the phase difference between inverter legs. The other variables Vm1 and Vm2 are, (5) where <P I and <P z describes the phase difference in each leg between upper and lower switches.…”

“…Contactless power transfer has experienced recently a growing attention from high power electric vehicle charging [1]-[2] to small power applications such as medical implant devices [3], and smartphone charging platforms [4]. Its application is not only convenient to supply power to many consumer electronic devices, but also provides safer experience without a cord [S].…”

Comparative analysis of hybrid and traditional resonators for magnetically coupled wireless power transfer

“…1 Due to the advantages of convenience and safety, wireless power transfer shows great potential for extensive application in electric vehicles, consumer electronics and implantable medical devices, and so forth. [2][3][4] Presently, near-field wireless power transfer (WPT) is categorized into magnetically inductive wireless power transfer (MI-WPT) and magnetically coupling wireless power transfer (MC-WPT) depending on different operating mechanism. As an efficient technique, MI-WPT suffers from short transfer distance which is about 1 cmr.…”

“…1 Recently a lot of work has been conducted by researchers using ring resonators to design bandpass filters for use in next generation high-data rate communication systems that require more than 20% fractional bandwidth (FBW), and good passband and out-of-band performance. [1][2][3][4][5][6][7][8] In Ref. [2], two open-circuited stubs are connected to a ring resonator to generate a wide passband depending on the lower and upper attenuation poles, whereas in Ref.…”

A 25 kW industrial prototype wireless electric vehicle charger

“…Efficient wireless transfer systems have been recently receiving a growing attention for their numerous potential applications such as electric vehicle charging, medical implant devices, smartphone charging platforms [1]- [3]. With a proper magnetic and power electronic circuit design, the overall efficiency of the system can be increased by minimizing conduction and switching losses [4]- [7].…”