文档介绍：无线充电详解——英文版 Theory advantage : safe, durable, convenient disadvantage : low efficiency, high cost, unstable, limited distance ic Induction (电磁感应) ic Resonance (电磁共振) Radio Reception (无线电波) Capacitive coupling (电场耦合) Transmission power 1-10W KW >100mW 1-10W Transmission distance 1mm-10cm 1cm-10m >10m 1mm-10cm Efficiency 80% 50% 38% 70-80% Application Smart phone; Tablet Automobile less less Theory Theory Theory Efficiency Wireless charging efficiency : 45%~82% Standard Qi standard —— WPC(Wireless Power Consortium) : Qi passes the benefits of both inductive and resonant charging technologies in a versatile standard. Qi products are incorporating both to offer the innovative services and features in the most energy- efficient and cost-effective possible. Most of the smart phone wireless chargers are using Qi standard. PMA standard —— Power Matters Alliance : Focus on inductive charging. Rezence standard —— A4WP (Alliance for Wireless Power) : Base on the principles of ic resonance. On June 1, 2015, A4WP and PMA, have announced the signing of the merger agreement between the anizations. The transaction establishes a core charging standard supporting a wide range of consumer, medical, military and industrial applications. Product Brand : Incipio Ghost —— 80 USD Type: 220 Input: DC 5V, 4A Output: 5V, Size: 89mmx178mmx15mm Charges 2 Qi -compatible devices and an extra device via USB Integrated USB charging port (charges a third device) Brand : Patriot Memory —— 20 USD Type: Induction Charger Input: DC 5V Output: 5V, 1A Size: Ф 102mm x Patriot Fuel iON ic Charging Pad Product Brand: RAVPower —— 40 USD Input: DC 5V, Output: 5V, 1A Size: 145mmx79mmx11mm Color : black 、 white RP-WCN11 : Built in 4800mAh battery backup Compatible with any QI-enabled LED light display charging indicator Product