What is Magnetic Wireless Charger?
Magnetic wireless charger, or inductive charging, powers devices without direct electrical contact. Instead, it uses electromagnetic fields to transfer energy between two objects. However, magnetic wireless charger became practical for consumer use only with modern electronics.
Magnetic wireless charger has changed the game, but it hasn't completely wiped out traditional chargers just yet. While wireless smartphone chargers are certainly the way forward, standard charging cables are still a common way to reach a full charge.
Benefits of Magnetic Wireless Charger
Speed
Wireless vs. wired charging speed is one of the main benefits of plug-in chargers. Wired charging takes less time to fuel your phone's battery. Pure Gear wall chargers can power your device up to 50% more than the standard charger in the same amount of time.
Use while charging
Magnetic wireless charger allow you to continue using your device while it's charging. The Ventev Charging Cable comes in 3, 6, and 10 ft. options for more mobility while getting your battery to 100%.
Efficient
Magnetic wireless charger provide a more stable current to the device, giving the battery a faster boost.
Portable
There are many options if you need to charge your phone while on the go. Plug your charging cord into the Ventev Portable Battery while walking around or usejj the Pure Gear Car Charger while on the road.
Types of Magnetic Wireless Charger Technologies
Electromagnetic Inductive Charging
Electromagnetic inductive charging is the most widely used form of wireless charging technology. It is commonly found in our smartphones, smartwatches, wireless earbuds, and the wireless chargers prevalent in the market today.
This technology operates on the principle of electromagnetic induction, where an electric current passes through a transmitter coil in the wireless charger, creating an electromagnetic field. This field then induces a current in a receiver coil located in the device being charged, thereby transferring power wirelessly. Electromagnetic inductive charging requires the device to be placed very close to the charger, often in direct contact.
Resonant Inductive Charging
Taking a step beyond electromagnetic inductive charging, resonant inductive charging allows for a slightly longer distance between the charger and the device. It utilizes two coils tuned to resonate at the same frequency, enabling energy transfer over a few centimeters.
This technology increases the flexibility of positioning your devices for charging and can charge multiple devices with a single charger. Despite its advantages, resonant inductive charging is less commonly used due to higher costs and more complex circuitry.
Radio Frequency (RF) Charging
RF charging uses radio waves to transmit energy from a charger to a device. The charger, connected to a power source, converts electrical energy into radio waves. These waves are then captured by the receiver device's antenna, converted back into electrical energy, and used to charge the battery.
RF charging can work over longer distances than inductive charging, such as a few meters, and does not require direct line-of-sight. However, it is typically less efficient and is more commonly used for charging low-power devices like hearing aids, wireless keyboards, and mice.
Magnetic wireless charger technology, empowered by magnets, is finding applications across various industries. Here are some notable examples:
Consumer Electronics
Magnetic wireless charger is commonly used for smartphones, tablets, smartwatches, and other portable devices. The convenience of placing a device on a charging pad without having to connect cables has made magnetic wireless charger a popular feature in consumer electronics.
Electric Vehicles (EVs)
The automotive industry is exploring magnetic wireless charger for electric vehicles. Wireless EV chargers use inductive charging technology to charge vehicles without the need for physical connectors. This innovation aims to enhance the ease of charging and support the growth of electric vehicle adoption.
Medical Devices
In the medical field, magnetic wireless charger is used for implants and medical devices. It eliminates the need for external connectors, reducing the risk of infection and mechanical failure. For example, magnetic wireless charger is used for devices such as pacemakers and hearing aids.
Industrial Applications
Magnetic wireless charger is also being implemented in various industrial applications, including robotics and automation systems. It provides a convenient way to keep machinery and tools powered without the hassle of cables and connectors.
Consumer Goods
Magnetic wireless charger is making its way into everyday consumer goods such as magnetic wireless charger pads, furniture with integrated charging capabilities, and even kitchen appliances. This trend reflects the growing desire for seamless and clutter-free living environments.
Magnetic Wireless Charger Efficiency
Let's take a look at the process of magnetic wireless charger. It has all the same inefficiencies of wired charging, there's a power brick and some copper wiring, but it also introduces an additional loss through the magnetic wireless charger coils.
Stage 1
Our charging brick takes the AC current in the wall and converts it to DC, just like in our wired example. No changes there.
Stage 2
The DC current then flows through the copper cable to the magnetic wireless charger pad suffering all the same energy losses as our wired example.
Stage 3
After powering some IC's, our excitable electrons arrive at the transmitting coil in the magnetic wireless charger puck. Unlike our wired example, our magnetic wireless charger coil needs AC current to create a magnetic field that can transfer energy. So we've converted AC from the mains to DC in our GaN charger, and now back to AC to power the transmitting coil. That's a fair amount of energy we've just lost throughout that process.
Stage 4
Once the coil has its AC supply, that current moves back and forth at around 140,000 cycles per second. Operating at such high frequencies introduces additional losses caused by the Skin Effect. When a current alternates in a conductor at high frequency, the electrons vacate the center of the conductor (the copper wire) and only utilize the outer surface. This effectively reduces the conductor's surface area, packing the electrons ever closer and increasing the number of collisions which occur. More collisions means more energy wasted as heat.
Stage 5
The energy transferred to the receiving coil will also oscillate at a high frequency meaning that the Skin Effect will apply here too. It also means that the receiving coil is generating an AC current and before charging can begin, that current needs to be converted to DC. That means that from the wall to the battery, we've converted.
Stage 6
The stream of electrons arrive at the battery and the charging process begins, just like in our wired example.
Stage 7
Unlike our wired example, magnetic wireless charger pads will continue to draw energy after you remove your phone. Typically around 0.2W but that figure fluctuates depending on the charger.
Components of Magnetic Wireless Charger
Creating a Charging Pad
Instead of a standalone transmitter coil, you can build a charging pad using a larger surface area. This allows you to charge multiple devices simultaneously.
Encasing the Components
To protect the internal circuitry and create a more polished look, consider encasing the transmitter coil, receiver coil, and charging module in a custom 3D-printed or wooden enclosure.
Adding Indicators
Incorporate LED indicators to visually indicate the charging status. This can be especially useful when charging multiple devices at once.
Integrating with Furniture
For a truly seamless charging experience, integrate the wireless charger into your furniture. You can build a charging station into a desk or create a charging shelf for your bedside table.
Steps to Use a Magnetic Wireless Charger
Step 1: Check for Wireless Charging Compatibility
Before using a magnetic wireless charger, ensure that your device supports wireless charging. Most modern smartphones offer wireless charging capabilities, but it's always a good idea to confirm this information. Check your device's user manual or visit the manufacturer's website for wireless charging compatibility details.
Step 2: Choose a magnetic wireless charger
Once you've confirmed wireless charging compatibility, it's time to choose a magnetic wireless charger that suits your needs.
Consider the following factors when selecting a magnetic wireless charger:
● Charging Speed: Look for a magnetic wireless charger that supports fast charging if you want to maximize charging speed.
● Form Factor: Magnetic wireless chargers come in various shapes and sizes, from charging pads to stands. Choose one that fits your lifestyle and preferences.
● Quality and Safety: Opt for magnetic wireless chargers that adhere to industry standards and offer safeguards like temperature control and overcharge protection.
Step 3: Prepare Your Device
To prepare your Android device for wireless charging, follow these steps:
● Remove any metal objects, cases, or covers that might interfere with the charging process.
● Wipe the back of your device to remove any dirt, dust, or residue that could hinder the wireless charging connection.
Step 4: Connect the magnetic wireless charger
To start using your magnetic wireless charger, follow these instructions:
● Plug the included power adapter into the magnetic wireless charger and connect it to a power outlet.
● Ensure the charging pad is positioned on a flat, stable surface to prevent your device from slipping.
● Some magnetic wireless chargers have LED indicators to show the charging status.
Step 5: Place Your Device on the Charging Pad
Now it's time to charge your device wirelessly:
● Position your device on the wireless charging pad with the phone's screen facing up.
● Ensure proper alignment by placing the device at the center of the charging pad, ensuring the receiver coil on your phone aligns with the charger's transmitter coil.
● Once aligned, a charging indicator or notification on your device's screen should confirm that wireless charging has started.
Step 6: Monitor the Charging Process
While your device charges wirelessly, keep an eye on the charging progress:
Check your device's screen for notifications or charging indicators that confirm the charging process is underway.
Step 7: Remove Your Device
When your device is fully charged or you no longer need to charge it, follow these steps to remove it from the magnetic wireless charger:
Gently lift your device off the charging pad.
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FAQ
Q: What Is a Magnetic Wireless Charger?
Q: Do magnetic wireless chargers work on all phones?
Q: What Devices Are Compatible with a Magnetic Wireless Charger?
Q: Is the magnetic charger worth it?
Q: Is Magnetic Charging Faster Than Regular Wireless Charging?
Q: What is the point of a magnetic charger?
Q: What Is the Range of a Magnetic Wireless Charger?
Q: Is magnetic charging the same as wireless charging?
Q: Are Magnetic Wireless Chargers Safe for Credit Cards and Magnetic Stripes?
Q: How do wireless magnetic chargers work?
Q: How Do I Know if My Device Is Charging on a Magnetic Wireless Charger?
Q: Are magnetic wireless chargers good?
Q: Do magnetic wireless chargers work through cases?
Q: Is Magnetic Charging good for battery?
Q: Do magnetic chargers drain battery?
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