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wireless charger

Wireless Charger Technology

Wireless Charger Technology is Changing the World. Here is how? 

You won’t need to worry if your hybrid car is charged if you purchase a 2016 Toyota Prius. Just choose the wireless energy transmission option, which allows you to drive to your garage and have the battery automatically charge using a pad on the floor. Within a year or two, wireless charger technology will allow for the purchase of computers, tablets, mobile phones, and other entertainment items without the need for wires. 

According to Morris Kesler, head of technology at WiTricity in Watertown, Massachusetts, “instead of having a different charging wire for every item you possess, you can leave your mobile phone or laptop in one spot and it will stay charged automatically.” “A cable is no longer required for these devices,” According to Kesler, the highly resonant wireless charger technology provided by MIT spin-off WiTricity is “useful in every circumstance where a gadget has a cable or battery that requires charging.”

wireless charger


An idea that resonated

A transmitter coil generates an alternating magnetic field, which is then transformed into an electric current in a receiver coil through magnetic induction. This wireless charger technology has been used in cordless power systems for decades; an example would be cordless toothbrushes. However, conventional magnetic induction-based wireless charger technology has significant operating constraints, particularly with regard to location and transmission range. A highly resonant type of magnetic induction that can effectively transmit wireless power over greater distances was successfully demonstrated by MIT physics professor Marin Soljai and colleagues in 2006; this innovation was later commercialised by WiTricity. 

Resonance, according to Kesler, enables more effective energy transmission over longer distances and with more positioning freedom than is feasible with a conventional inductive system (wireless charger technology). For instance, your cordless toothbrush only functions when it is inserted into the holder. Resonance technology makes it possible to place the receivers farther apart while maintaining effective power transfer, and device alignment is less important than it is with a conventional system. Additionally, you can charge through objects like tables and transfer power from one source to several devices without the source and devices having to be the same size.

Most significantly, he emphasises, “technology allows you to upload stuff without thinking about it.” “Your gadget charges as you go when you set it on a table or in a work space.” According to Kesler, WiTricity wireless charger technology interacts with the human body extremely faintly, much like other magnetic-inductive power transfers do. It complies with the same legal safety requirements as conventional home appliances and equipment. The Alliance for Wireless Power, whose The RezenceTM specification incorporates WiTricity wireless charger technology, is working to standardise long-distance wireless transmission of power using MRI, and the Society of Automotive Engineers is pursuing this goal for automobiles, while the Society of Automotive Engineers is pursuing it for consumer electronics.

Powering up under difficult conditions

WiTricity wireless charger technology delivers huge advantages in situations where power supply is challenging, in addition to appealing convenience enhancements for autos and consumer devices. One example is the development of better cardiac assist pumps by WiTricity wireless charger licensee Thoratec employing enhanced wireless power delivery. Today, cables implanted within the body are frequently used to power these pumps. With improved mobility and the removal of burdensome wires that might harbour bacteria, wireless charger technology has the potential to enhance patients’ quality of life. According to Kesler, medical equipment that are implanted several inches under the skin might be charged efficiently and securely. The technique has a wide range of industrial applications in addition to several medicinal ones. Significant advantages of remote wireless power transmission include the ability to power wet device types.

According to Kesler, “A gadget like this doesn’t necessary want to have a charging port.” To connect to the store, the gadget uses our technology, which allows you to wirelessly charge it without having to plug it in, thereby providing a safer usage paradigm. According to Kesler, “The WiTricity wireless charger technology would let you charge them without needing precise placement or exposed electrical components.” The business also sees a range of military uses, such as repurposing battery packs carried by soldiers on foot and powering remote-controlled vehicles.

Readying for fast-growing markets

For consumer electronics applications, WiTricity’s wireless charger technology licensees include Intel and Mediatek, while for automotive applications, they include Delphi, IHI, TDK, and Toyota. IHS Technology projects that by 2018, the global market for wireless power systems of all kinds would grow to US$8.5 billion, with the advent of mobile phones and tablets being the main driving factors. There are several firms offering various technologies and system designs in this fiercely competitive sector. Many devices use conventional magnetic induction to function, but Kesler notes that those that use MRI technology require a licence from WiTricity wireless charger. “The market has started to catch up with the technology, and we are working toward standardised licence agreements to make it easier for our clients to implement this,” he claims. The business creates prototypes and reference designs to aid licensees in the development of their applications. It also provides the WiCAD simulation environment, a design tool that enables businesses to digitally establish specifications for their designs before investing in costly prototypes.

Additionally, Witricity wireless charger technology offers demo goods for businesses interested in technology to use. According to Kesler, “In our work, we can also illustrate the technology in a way that is challenging to convey on a sheet of paper.” “Typically, when people see technology, they exclaim, “Wow, it looks like magic, how do you do it? ” The race to create an all-encompassing wireless charging method has begun. Wireless charging items and new, innovative technical advancements are continually being developed, with some businesses focusing on one technology while others are working on multiple wireless charger technology. Due to the absence of a unified wireless power standard, however, the lack of compatibility across the technologies continues to be a significant issue.

Wireless charger technology has long been a theoretical possibility. Nikola Tesla spent a lot of time working on developing a system to distribute wireless electricity around the world in the early 1900s, but he was never entirely successful. With his ground-breaking creation, the Tesla coil, he got close. The way power was used was altered by this wireless transmission technique.

The Tesla coil was invented by Nikola Tesla in the 1900s. (Courtesy of Wikipedia)

Numerous wireless charger technology or technologies—such as electromagnetic induction, magnetic resonance, capacitive coupling, magnetodynamic coupling, etc.—can be used to transmit power over short distances without using interconnecting cables. The first two products in this group are presumably the ones that are currently utilised the most.

Electromagnetic Induction (Inductive Coupling)

This near-field technique creates a magnetic field between coils of wire to deliver energy wirelessly (wireless charger technology). A magnetic field is produced when electricity passes through a transmitter coil, creating tension in the receiving coil. The power transfer is improved by greater coil coordination. The degree of connection is indicated by the coupling factor K. The K-value is influenced by a number of variables, including the inductors’ spacing, angle between them, and coil design. The system can operate as a loosely coupled system or a closely coupled system, depending on the distance between the transmitter coil and the receiver coil. The diameter of the transmitter and receiving coils is the same in a strongly linked system.

Magnetic Resonance (Resonant Inductive Coupling)

This near-field technique uses an electromagnetic induction-inspired resonance phenomena to wirelessly distribute energy across a room. The material and design of the coils influence the resonance (or vibration) frequency at which the transmitter and receiving coils vibrate (wireless charger technology).

Trending Products

The majority of goods on the market right now use wireless charging technologies based on magnetic induction and magnetic resonance. These consist of:

  • Qi: Developed by the Wireless Power Consortium (WPC), Qi powers or charges a wide range of gadgets, including wireless kitchen appliances and cellphones. It combines the wireless charger technology of induction and resonance.
  • PowerbyProxi – These WPC participants provide resonant wireless solutions for a variety of battery-powered applications, but their efficacy is constrained by design issues. They supply the industrial sector with a number of product options. For instance, the wireless Proxi-Point connection charges batteries and powers sensors in inaccessible locations.

Magnetic-resonant coils power a light bulb. (Courtesy of Revolution Green)

WiPower: Qualcomm is a part of the Airfuel Alliance and the WPC. The foundation of its WiPower technology is magnetic resonance. Recently, WiPower revealed that it can wirelessly charge gadgets with metallic casings through its wireless charger technology.

  • WiTricity: This magnetic resonator-based wireless charger technology is intended for ranges between one centimetre and many metres. It is intended for direct integration into products and systems by Original Equipment Manufacturers (OEMs) (Fig. 7). The Airfuel Alliance actively counts WiTricity as a member.
  • Powermat: This electromagnetic induction-based wireless charger technology features a pad that charges electrical gadgets. The Power Matters Alliance has verified it (PMA). At charging stations, devices with built-in wireless charging may be quickly switched on. A plug-in powermat ring is used to wirelessly activate the gadget when it isn’t already on.

Major Players

Two significant groups in this field that deal with both MRI and electromagnetic induction are the Wireless Power Consortium (WPC) and the Airfuel Alliance. The Qi standard was developed by the WPC, which was established in 2008 for wireless charger technology. Members of the WPC collaborate to standardise wireless charging around the globe. More than 200 businesses collectively provide more than 800 items that adhere to the Qi standard. LG, Qualcomm, Samsung, Texas Instruments, Toshiba, and Verizon are among the board members.

About the Author

Ahsan Azam is the author who specializes in avionics as well as research writing. The author has a keen attention to detail and is focused on providing interesting content to the readers.

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