Yes, wireless power transmission has been invented. It uses electromagnetic fields to transfer power without the need for physical wires and cables. This technology is already in use to wirelessly charge devices such as electric toothbrushes, smartphones smartwatches, and medical devices as well as high-power applications like wirelessly charging electric vehicles, AGVs/AMRs.
Researchers are continuously working towards improving the power levels and energy efficiency and reducing distance limitations.
Wireless power transmissions for small home appliances are already underway. As technology advances, several myths related to energy efficiency, high-power transmission, safety considerations, as well as regulatory requirements need to be addressed before we witness widespread adoption.
With a few wireless power solutions already under development and at an advanced stage, sooner we will be cutting the cords from the small kitchen appliances on the kitchen countertops. There are many benefits associated with wireless power-enabled kitchen appliances.
Yes, one can wirelessly power/charge devices from long distances just as we connect via WiFi. Such technology was invented more than 100 years ago.
Few types of long distance wireless power technologies include RF-based (Radio frequency); Infrared-based; Ultrasonic-based; mmWave-based (millimeter wave), Solar-power from Space, and others.
Applications under consideration include low-power devices (IoT sensors, Electric-Shelf Labels, wearables) to medium/ high-power applications like consumer and medical devices. telecom base stations, satellites, and many others.
Yes, there are various types of wireless power technologies differing based on the frequency levels.
We have low-frequency (induction and resonance)-based solutions (using 25kHz-330kHz), high-frequency (resonance and NFC)-based solutions (using 6.78MHz-13.56MHz), and then ultra-high-frequency (RF, Infrared, Ultrasonic, mmWave)-based solutions (using 900MHz, 2.6GHz, 5.8GHz and higher).
Each of these solutions, with its pros and cons, has its characteristics catering towards relevant application markets.
Adherence to regulatory standards is critical for power supply systems in our industry ensuring safety, reliability, and compliance with international and regional norms. Standards such as UL, IEC, and FCC play pivotal roles, addressing factors like electrical safety, electromagnetic compatibility, and communication protocols.
Efficiency optimization in power supply across varied applications involves selecting high-efficiency components, utilizing advanced topologies like resonant converters, and implementing dynamic power management. Minimizing resistive losses through effective layout design, leveraging feedback control, and incorporating energy-efficient materials further contribute to enhancing overall efficiency.
They would include the integration of wide-bandgap semiconductors for enhanced efficiency, the rise of digital power control and management systems for increased flexibility and adaptability, as well as the continued development of wireless power transfer technologies. Additionally, advancements in energy storage solutions and increased emphasis on eco-friendly and sustainable power supply designs are expected to shape the future landscape of power electronics.
Wireless power transfer efficiency is generally lower than traditional wired methods due to energy losses in transmission. While wired connections have minimal losses, wireless power systems encounter challenges such as electromagnetic interference, distance-related power attenuation, and conversion losses. Despite these efficiency differences, ongoing advancements in wireless power technology aim to narrow the gap, making wireless solutions increasingly viable for various applications where convenience and flexibility outweigh the efficiency trade-offs.
Qi2 (Chi Two) is an advancement of an existing wireless power industry standard-based solution developed by WPC (Wireless Power Consortium) and its esteemed members.
Qi2 addresses quite a few issues present in exciting Qi solution such as foreign object deduction, interoperability, authentication.
Also Qi2 comes in two variants. Magnetic based (Similar to Apple’s MagSafe) and standard based solution
Qi2 is primary solution is supposed to MPP (Magnetic Power Profile) which is magnet-based (MagSafe type) solution. And the other one is EPP (Extended Power Profile) which is exactly same as MPP except the integration of magnetics in receiver and transmitter. Both the solution would enable upto 15W solution in current form with expectation to increase further upto 50W in a phased manner.
Possibly yes as it would depend on the base solution embedded in those devices. If they are BPP-based (Basic Power Profile) they would seamlessly charge at 5W. If they are EPP based they would charge at 15W. But if they are PPDE (Proprietary Power Delivery Extension) then it would depend upon the transmitter if it supports them.
Based on WAWT research and market intelligence, Qi2 is expected to go much beyond mobile phones such as tablets, laptops, furniture’s, cars, consumer electronics, lighting fixtures. Here I mean not as transmitter for mobile but for wirelessly charging those devices itself.
Qi2 is expected to add magic into the wireless charging world. Saying so, there would be any other formats of wireless charging too available in the market, WAWT hopes would be interoperable with each other for betterment of everyone.