QI – THE STANDARD FOR WIRELESS CHARGING
Wireless power isn’t a new concept. The idea was conceived in the late 1800s when visionary scientist and engineer Nikola Tesla began powering lights remotely. The same principles have led to Qi, the global standard for charging mobile devices through wireless power transmission.
Qi allows product developers and manufacturers to change the way that people and devices interact with power and data. It dynamically seeks resonance and optimizes power transfer under multiple, varying load conditions and spatial configurations. It can be utilized essentially anywhere traditional power needs exist. It is a revolutionary advancement unleashing a new world of creative options – power and data can be efficiently transmitted to virtually any electrical device without the constraints of plugs, power cords and chargers.
Simple and safe, Qi charges or powers an array of devices, from smartphones to cordless kitchen appliances. The technology combines the benefits of both induction and resonant charging to deliver a versatile standard that offers a full range of innovative features and capabilities.
NO MORE CORDS
Wireless power enables designers and manufacturers to cut the final cord and give consumers what they’ve been asking for – a truly wireless lifestyle. Through the Qi standard, power, data and communications now flow across devices from different manufacturers ensuring a seamless user experience.
EXTENDED PRODUCT LIFE
Wireless power eliminates the need for external ports. Devices can now be designed to eliminate the wear and tear on connectors and cables that comes with repeated use. They can also be completely sealed to protect them while operating in unforgiving environments, including under water and in extreme temperatures.
Any product that requires power can utilize wireless power technology. It applies to everything from consumer electronics like phones and tablets to kitchen appliances, medical devices and beyond. And with the Qi standard driving development, multiple devices from different manufacturers can now be supported by a single source, making easy, efficient charging simple.
A GROWING INDUSTRY
From fully integrated devices like Apple’s latest iPhones to a growing list of infrastructure providers including leading automotive companies, IKEA and Starbucks, wireless power is a mainstream technology poised to change the way everyone thinks about powering their lives. The only limit is your imagination.
WIRELESS POWER HAS ARRIVED
Wireless charging and power are evolving quickly. New products are being announced daily, the Wireless Power Consortium is growing and Qi is moving rapidly into higher power applications like kitchen appliances to meet growing demand.
Don’t get left behind. Contact us today to learn more about how nok9 can help accelerate your product development path. From consulting services and in-lab testing to the industry’s most complete wireless power compatibility and quality assurance testing systems, we can help you develop a forward compatible, proactive approach to designing and manufacturing your next wireless power products.
THE SCIENCE OF WIRELESS POWER
Wireless power transfer was first demonstrated in the late 1800s, but it is only in the last decade that the technology has been perfected to the point where it offers tangible benefits to real world applications. In particular, the development of resonant wireless power technology for the Consumer Electronics market, has seen charging by induction (wireless charging) deliver new levels of convenience for the charging of millions of everyday devices.
HOW IT WORKS
Wireless power is commonly known by many terms, including inductive power transfer (IPT), inductive coupling, resonant wireless power and resonant power transfer. Each of these terms essentially describe the same fundamental process – the wireless transmission of electricity or energy from a power source to an electrical load, without connectors, across an air gap. The basis of a wireless power system involves essentially two coils – a transmitter sending energy to a receiver coil via an oscillating magnetic field. The transmitter coil is energized by alternating current to generate a magnetic field, which in turn induces a current in the receiver coil.
To achieve this, direct current (DC) supplied by a power source is converted into high frequency alternating current (AC) by specially designed electronics built into the transmitter.
AC energizes a copper wire coil in the transmitter, which generates a magnetic field. Once a receiver coil is placed within proximity of the magnetic field, the field can induce an alternating current in the receiving coil.
Electronics in the receiving device then convert AC back into DC creating usable power.
The entire process is illustrated in the “How Wireless Power Works” diagram on this page.
WHAT IS “RESONANCE”?
The distance at which the energy (or power) can be transferred is increased if the transmitter and receiver coils are resonating at the same frequency. Resonance is the frequency at which an object naturally vibrates or rings – much like the way a tuning fork rings at a particular frequency and can achieve its maximum amplitude.