February 08, 2017
How Does a Wireless Charging Pad Work?
Wireless charging has recently become one of the most flexible and convenient means by which to charge your electronic devices. The elimination of the need for physical cables and connectors to provide the ability to charge devices has many advantages over traditional charging methods. Contrary to popular belief, wireless charging impacts more than just handheld devices like cell phones. Wireless charging is a technological advancement that has spread to many industries and products in order to give consumers access to the most efficient, convenient, and cost-saving method of charging available. Because of its relative newness to many commercial products, many consumers do not have a strong understanding of the technology and processes that allow wireless charging to occur. Below is a guide of how wireless charging pads work, why they are beneficial, and how they could impact your life.
What is Wireless Charging?
Wireless charging, sometimes referred to as wireless power transfer, utilizes electromagnetic fields in order to transport power from one device that outputs power into a different device that will input the power in order to recharge its battery. Often times, the device outputting energy is called the transmitter, while the device utilizing the energy to recharge is deemed the receiver. The most remarkable aspect of wireless charging is that this process can function without the use of a physical connection between the devices. This allows users to be able to charge their devices without having to rely on a USB charging cable or available port space. In a world that is increasingly on the move both in industry, life, and at home, wireless charging is the future of maintaining battery life and connection to the technological world.
Though wireless charging may seem like recent advancement, it has actually been being used for a variety of platforms for many years and is widely believed to have been discovered by Nikola Tesla in the late 1800’s. Despite the discovery of wireless power transfer (WPT) over a hundred years ago, it is only in recent years that the production of wireless charging products has reached a fever pitch. Some industries integrated wireless charging into their products years ago without most people realizing the technology they were utilizing. One of the most common household items people do not realize uses wireless charging technology is rechargeable electric toothbrushes. By harnessing wireless power transfer technology and implementing it into everyday uses that meet the technological needs of an advancing generation of electronics, many companies have been able to capitalize on a nuanced utilization of familiar technology.
A Breakdown of How a Wireless Charging Pad Works
Wireless charging utilizes electromagnetic fields in order to move power from one transmitting source into a specified receiving device to recharge the battery. As mentioned above, when attempting to understand how a wireless charging pad works, it is vital to keep in mind that the charging pad is a transmitter that is responsible for moving its charge into a receiver, such as a mobile device, in order for the receiver to recharge its battery. Wireless charging utilizes the principle of magnetic resonance to accomplish this transfer of power, sometimes referred to as Inductive Power Transfer (IPT). Inductive Power Transfer relies on coils to induce an electromagnetic field that is capable of transferring the electrical current between two objects without them needing to be physically connected. With this in mind, below are the steps that comprise the wireless charging process in order to offer a better understanding of how this technology functions.
The voltage from the transmitter is converted into a high frequency alternating current (AC).
Once the high frequency alternating current is generated, it is directed to a transmitter coil by the transmitter circuit. From there, the alternating current can create a time varying magnetic field in the transmitter coil.
After the alternating current successfully generates a time varying magnetic field within the transmitter coil, the alternating current within the transmitter coil generates a magnetic field that is capable of extending to the receiver coil (provided it is within a specified distance).
Once this magnetic field is generated within the received coil, a current is established within the receiver coil of the receiving device. The process in which the transmitter coil and receiver coil flow energy between them is known as magnetic or resonance coupling. Magnetic or resonance coupling gained its name because in order for this flow of energy to successfully occur, both coils must be resonating at the same frequency.
Once the current is established between the transmitter coil and the receiver coil, the current flowing within the receiver coil is capable of being converted into a direct current (DC) by the receiver circuit. Once this direct current begins flowing into the receiver circuit, the battery of the device will begin to be charged.
Inductive Vs. Resonant Technology
When discussing wireless charging technology, two terms often govern the discourse, those terms being inductive and resonant technology. From most perspectives, inductive and resonant technology exist in tandem. Inductive power transfer is the overriding principle that is foundational to achieving wireless charging. Inductive power transfer harnesses resonance in order to achieve the coupling between the transmitter and receiver coil, which is key to how the wireless connection can be attained. When the transmitter and receiver coil are coupled, both coils must resonate at the same frequency in order for the current to be established. However, recently there been a new term that emerged, known as resonant wireless charging.
Resonant wireless charging is considered by many to be the future and an improvement upon standard inductive capabilities because it offers a number of advantages that increase convenience and wireless charging performance. Resonant wireless charging is thought to have a more efficient and quick method of charging devices. In most current devices, wireless charging occurs at a slightly slower rate than traditional wired charging methods. However, resonant wireless charging technology aims to bridge that gap and speed up charging time as this will be an important factor consumers examine when choosing a wireless charging pad for their device. In addition to this, resonant wireless charging also aims to charge multiple devices at the same time. In order to accomplish this, there must be a coil infrastructure developed to allow multiple resonant currents to be established simultaneously, while still distributing energy safely to each device. The final aspect of resonant wireless charging that has distinguished it as the future is a lessening in the spatial accuracy and proximity required to successfully achieve a charge. Basically, this means that resonant wireless charging would make it possible for a device to be on top of a transmitter without being precisely aligned and still be able to successfully establish a resonant coupling and initiate charging.
The Benefits of Wireless Charging
Wireless charging provides a number of benefits for consumers that have spurred its rapid gain in popularity. One of the main benefits of wireless charging is the lack of cables needed to be able to ensure your most important devices are always charged when you need them. Instead of fumbling around with a cord and making sure it is plugged into the right port correctly, you can rely on your wireless charging pad to ensure you can achieve the same charge without the fuss. In addition to just being easier, it is also safer to have less cords with active electrical currents in your home. Fire danger is a concern for those with many cords laying around their home and wireless charging can help eliminate the need for that anxiety because it does not require as many cables. Wireless charging also eliminates the need to keep buying new charging cables when they wear out. Devices that are heavily used, such as cell phones and laptops, often force users to continually replace their charging cable due to fraying, breaking, and the inability to connect properly.
Another benefit to wireless charging is that it is no longer necessary to rely on having an open port on your device to establish a charge. In some devices, the ports can wear down over time from heavy use and sometimes can stop being able to establish a charge. When this happens, if only relying on a direct connection, the device must be replaced in order to recharge it and maintain it normally. However, without the wear and use on charging ports, users will no longer need to replace devices due to faulty charging ports. The implementation of wireless charging also encourages a more environmentally friendly approach to technology. Because wireless charging does not need to utilize any kind of cable or power adapter to establish its connection, there will be a notable reduction in the production, and eventual discarding, of charging cables and power adaptors.
With the rapid increase and advancements in wireless charging technology, it can also be expected that there will be more wireless charging hubs available in popular places, such as airports, coffee shops, and libraries. The convenience of being able to stop in an airport and charge back up without rummaging through your suitcase to find your USB cord cannot be underplayed. The world is humming along at a rapid speed and no one wants to have to halt to find a charge, or worse, to have their devices run out of battery and be unusable for a stretch of time.
Another benefit of wireless charging is that with wireless charging it is possible to charge multiple devices at once. When charging multiple devices through direct charging it is a hassle because of the mess of intersecting cords, wireless charging removes the hassle and clutter to give consumers the quick and easy charge that they want and need. In addition to this convenience, wireless charging also makes it possible to easily grab a device and use it quickly, such as to start a show, answer a text, or write an email, and then set it back down to begin charging. With direct charging, each time your phone is retrieved you would need to unplug, use it, and then plug it back in, or conversely you could struggle against the tension created in the cord when you try to use it while it is plugged into the wall. None of those options work well, and wireless charging fixes them all to create a seamless, modern way to remain charged and ready to take on life.
How to Integrate Wireless Charging Into Your Life
Now that the benefits of wireless charging have been established, you may be asking yourself how you can integrate wireless charging into your life to reduce your hassle and increase your ease. One of the best ways to introduce wireless charging into your daily routine is with the purchase of a wireless charging pad for your mobile device. For many people, their mobile phone is essentially a handheld computer with which they communicate with everyone in their network, including work, family, and friends. Many professionals rely on their mobile device to communicate with clients, coordinate with their team, and answer correspondence quickly to continue moving projects to their completion. In a world in which each answer is expected to be immediate, each email returned promptly, and each phone call answered swiftly, it is essential that you not go without a charged device.
Thankfully, mophie has developed a wireless charging pad and juice pack compatible case to meet all of your technological battery life needs.
mophie has adapted the juice pack battery case to be compatible with wireless charging technology in order to further improve the ease of maintaining a charge. All you need to do is place your mophie juice pack battery case with charge force wireless power on any wireless charging station and immediately upon contact, your device will begin charging its battery. mophie juice pack battery cases with charge force wireless charging are compatible with Qi and other wireless charging technologies in order to allow you to utilize any wireless charging hubs you encounter on the go. mophie juice pack battery cases with charge force ensures you never go without a charge and can stay connected to everything important.
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