In this post, we will explore how wireless charging eliminates the need for charging cords and enables the simultaneous charging of many devices. There are no compatibility issues with charging cables. Fundamentally, wireless charging is based on electromagnetic induction: A current is induced by a time-varying magnetic field in a closed loop of wire to transport power from the transmitter to the receiver without the need for a physical connection.
Wireless Charging Technology
Wireless Charging Technology permits auto-shutdown upon completion of charging. Due to the absence of mechanical connectors, the manufacturing costs are lower. Incorporating this technology into mobiles will allow mobile makers to eliminate power supply sockets, which allow water, dust, and other corrosive substances to enter the device.
Wireless charging eliminates the need for charging cords and enables the simultaneous charging of several devices. There are no compatibility issues with charging cables. Fundamentally, wireless charging is based on electromagnetic induction: A time-varying magnetic field induces a current in a closed wire loop to transfer power from the transmitter to the receiver without the need for a physical connection.
How does Wireless Charging Technology work?
Wireless charging technology, also known as Inductive charging or cordless charging, transfers energy between two items via electromagnetic induction using an electromagnetic field. This is often accomplished via a charging station. An inductive connection transmits energy to an electrical device, which can subsequently use the energy to charge batteries or operate the device.
Induction chargers employ an induction coil to generate an alternating electromagnetic field within the charging base, and a second induction coil in the portable device transforms the power from the electromagnetic field back into an electric current to charge the battery. In close proximity, two induction coils unite to form an electrical transformer. When the inductive charging system employs resonant inductive coupling, greater distances between the sender and receiver coils are possible.
Inductive charging applications fall into two broad categories: low power and high power:
- Low power applications typically support small consumer electronic devices, such as cell phones, handheld gadgets, certain PCs, and other devices that typically charge at power levels below 100 watts.
- In general, high power inductive charging refers to the inductive charging of batteries at power levels of more than 1 kilowatt. Inductive charging provides an automated and cordless alternative to plug-in charging for electric vehicles, making it the most important application area for high-power inductive charging. These devices can have power levels ranging from 1 kilowatt to 300 kilowatts or greater. All high-power inductive charging systems utilize primary and secondary coils that are in resonance.
- Protected connections, so no chances of corrosion
- Low infection risk for embedded medical devices
- Durability is no need to constantly plug & unplug the device preventing wear & tear
- Increased convenience and aesthetic quality as no need for cable
- Inductive charging systems can be operated automatically resulting in higher reliability. Protected connections, thus there are no possibilities of corrosion
- Low infection risk for medical devices embedded
- There is no need to repeatedly plug and unplug the gadget, which prevents wear and tear.
- Enhanced convenience and visual quality due to the absence of cables
- The automatic operation of inductive charging systems enhances system dependability.
- Sluggish Charging
- More expensive
- While charging, the device cannot be moved, which is inconvenient.
- Compatible standards with individual devices
Wireless Charging Technology – The Qi Standard:
Over 320 firms, including Philips, Sanyo, Panasonic, Nokia, Samsung, Sony Ericsson, LG, HTC, and Motorola, are members of the Wireless Power Consortium, which established the Qi (pronounced chee) standard in 2010. Qi is the indicator of compatibility between power transmitters and receivers. The number of smartphones, cameras, speakers, and wearables that utilize Qi technology as a standard is rapidly expanding. All Qi receivers are compatible with all Qi transmitters, hence all Qi-enabled devices are compatible.
Qi originates in Asian philosophy. It refers to an intangible flow of power, or “vital energy.” When this logo is present on your mobile device, it is compatible with any ZENS Wireless Charger.
Design Tips For Engineers:
Manufacturers need semiconductor solutions to tackle wireless charging difficulties such as low efficiency, heat dissipation, expense, and short-distance transmission. Effective and simple-to-design transmitter options are at the top of the list.
- Intelligent heat management maintains the transmitter and surface within the operating temperature range, preventing the device’s battery from overheating when charging. The design should be portable and compact. By reducing switching and conduction losses, it is possible to accelerate the charging rate.
- In place of GaN, Infineon uses silicon technology that is established and reliable to provide high performance. It is currently working to improve performance using silicon-level maturity medium-voltage GaN systems.
- Vinay, a sales representative from Mouser, explains that their solutions utilize inductive charging and that they have minimized the leakage field by putting an EMI shield at the rear of the coil to achieve up to 93 percent efficiency
Hope this blog helps you to understand What is Wireless charging Technology & Applications. We, MATHA ELECTRONICS will come back with more informative blogs.