What is QI charging. How to work wireless universal charger Qi. Whether wireless charging is dangerous

1. What is wireless charger According to QI standard
The world becomes mobile and "wireless".

In the modern world, all manipulations with file transfer with the use of a smartphone happens "by air". Internet access on Wi-Fi is at home, at work, in the cafe are perceived as a given, and rarely have difficulties in its use. Time came forwireless transmission Energy.

In 2008 was founded Consortium wireless electromagnetic energy"(Wireless Power Consortium, WPC), which combined producers in Europe, Asia and America. The purpose of the "Consortium" is the development of a single standard of wireless charging technology.

Already in 2009, the company Palm. Provided the first phone with support for wireless charging. Later, in September 2012, Nokia.introduced to the market 2 smartphones - Lumia 820. and Lumia 920. Also with support for QI standard. Next, the large manufacturers of smartphones were tightened - Samsun.g., Google Nexus. (ASUS, LG.), Sony, etc.

Since 2014, our company Zaryadqi has been developing and distributing wireless charging in Russia. In our store the largest selection of wireless charging and we constantly follow the novelties and expand your range. You will definitely find suitable charging in our store.
2. Principle of work

Simple language:
- The charger is connected to the power source.
- A magnetic field is created.
- The smartphone must support wireless charging - have an embedded receiver or receiver installed additionally.
- The phone is put on the charger.
- The recharge of the smartphone starts automatically.
From a technical point of view:

The energy is transmitted from the transmitter to the receiver-receiver through a interconnected magnetic field that occurs when the variable current over the transmitter coil.
If the coil of the receiver is in close proximity, much of the power transmitter lines will pass through the coil of the receiver, creating an alternating current in the receiver, which is then converted into a constant voltage.
3. Benefits
Simply. Put your smartphone on the QI wireless charging and it will start charging automatically.

Modern. All major IT companies are already developing their devices according to QI standard.

Universally. Any device with receiver-receiver Qi is charged from any QI wireless charging.

Safely. The generated electrical field is safe for humans and distributes only 1 cm from the device.

Comfortably and convenient. No need in a pile of wires, which are subsequently confused or simply lost.
4. Telephone models that have a built-in receiver-receiver and support wireless charging "out of the box"
More and more manufacturers of smartphones are starting to build receivers-receiver in their top models: Apple iPhone XS, XS Max, XR, X, etc., Samsung Galaxy S9 / S9 + / Note 9, Xiaomi Mi Mix 2S, Huawei Mate 20 Pro and etc.
- Apple iPhone 11 Pro Max
- Apple iPhone 11 Pro
- Apple iPhone 11.
- ASUS Padfone S.
BlackBerry.
- BlackBerry Priv.
- BlackBerry Z30.
- BlackBerry Classic.
- BlackBerry Passport
- BlackBerry 8900.
- Casio G "z One Commando
Caterpillar.
- CAT S50.
- CAT S50C.
- Dewalt MD501.
- Dewalt Mil810g.
Energy Sistem.
- ENERGY PHONE PRO QI
- Fujitsu Arrows F-09D
- Fujitsu Arrows Kiss F-03D
- Fujitsu Arrows Kiss F-03E
- Fujitsu Arrows X F-10D
- ZTE TELSTRA TOUGH MAX
5. For some telephone models, special receivers receivers are available to support wireless charging.
6. How to use wireless charging
7. Types of wireless charging
We conventionally divide wireless charging for several types of functionality:
- . Standard charging stations In the form of a small "platform" to which the phone is placed, or charge, built into the technique - lamp, clock, weather station, etc.
- . Wireless charging for use in the car: with special holders and trains for the phone and adapters in the cigarette lighter.
- . Wireless charging with a stand function, i.e. The phone during recharging is at an angle for convenient viewing of video, mail, social networks.
- . Wireless charging with a built-in battery differ in each other, in addition to the design, the number of additional USB ports and battery capacity is from 4000 mAh to 10,000 mAh.
- . Wireless charging for embedding in tables, couches, bar racks. Have a special design and protection against moisture and dust.
As well as on the scope of use or field of use:
- Houses / in the office
- In car
- On the way

8. Receivers receivers are

Built-in- already installed in a smartphone manufacturer.

If the manufacturer of your phone has not provided the ability to wireless charging, it can be easily adapted to this charging! For this, a special receiving film is used - there are several types of them:

In the form that is installed under the lid of the smartphone. To do this, there must be special contacts in the phone.
which connects to the power port Lighting from Apple and Micro-USB android smartphones.

Picture	Description
	The film is attached to the phone cover, the functionality of the phone does not decrease. Standard cable can be used simultaneously with the receiver-installed receivers. Such receiverQI for phones with special contacts Suitable for phones in which there are special contacts for wireless charging: SAMSUNG NOTE 4, Samsung Note 3, Samsung Note 2, Samsung Galaxy S5, Samsung Galaxy S4, Samsung Galaxy S3 and others.
	The film is attached to the back surface of the phone. In this case, it can be closed with any standard cover: from leather, plastic, silicone - on the process of charging it will not affect. The connector, which is inextricably linked to the film, should be in the Lightning connector. Disadvantages Availability of film receiver does not deliver. Such Apple.-receiverQI Suitable for apple devices with Lightning connector: Apple iPhone 5, 5S, 5C, 6, 6S, 6Plus, 6splus, SE, 7, 7 PLUS; iPad Air. 2, ipad mini. And others (Apple in currently It does not provide for wireless charging without accessories)
	Such Universal ReceiverQI Suitable for any phone equipped with a USB connector for classic wired charging. The film is fastened under the lid or the case of the smartphone. The plug, inextricably linked with the film, should be charged with the Qi standard in the Micro-USB connector. Disadvantages Availability of film receiver does not deliver.

In phones with a Micro-USB port, the connector can be one of three types depending on its view if you put the phone top screen.

Type "C" It appeared relatively recently - it can be found on the number of devices. Thus, the type "C" is equipped with MacBook 12 ", SAMSUNG TABPRO. S, Google Nexus 6p, Microsoft Lumia. 950 XL, ZUK Z1, Google Pixel C, Google Nexus 5X, One Plus. 2, Acer Aspire. Switch 10 V and other devices.

In addition to the above receivers, depending on the location of the connector in the phone, such receivers can be approached - they are called side or shifty:

Accordingly, for each type and position of the connector, you need your Universal ReceiverQI. Deciding correctly the type of Micro-USB connector on your phone you buy the right receiver for wireless charging and allow yourself to abandon the wires!

There are also: the receiver is already built into the case, so it is enough to wear a cover on the phone and it will be able to charge without wires.

You can always call the manager online store model of your phone - we will pick up for you the optimal receiver receiver!

9. The difference between wired and wireless charging
Wireless charging gives current - 1 amp and 5 volt voltage. The standard power adapter that goes into the kit with a smartphone produces from 1 to 2a. And when charging your phone from a computer (USB port) - the phone is charged with a current from 0,5a (USB 2.0) to 0.9a (USB 3.0).

In this regard, you will not even feel the difference in charging time or it will not be significant.
9. Energy efficiency
The energy efficiency of Qi wireless charger is approximately 80%. It is worth understanding that energy efficiency is 100% simply impossible to achieve, in standard wired chargers, this indicator is from 75% to 95% at best.
10. Security
In wireless chargers, non-ionizing frequencies are used that do not have harmful physiological impact on a person. The QI 1.2 standard includes detecting foreign objects in the charger's action field, providing additional safety; Charging is possible only with Qi-compatible devices. Also ours charging device And smartphones have built-in safety mechanisms based on thermal control.

Have questions?

Hello, dear readers. I am sure you are at least remotely, but heard that the phone can be charged without using wires. Surely many dismissed, thinking that such modern technology is only in very expensive devices. And here is not.

Supports wireless charging almost any phone, however, with some reservations. Brand smartphones already from the "box" can receive energy through the air, for the rest they will have to buy special accessories. Today you will not only learn whether your mobile wireless charging supports, but also, how to refuse the wires if your device is outdated.

Wireless charging - what is it?

Photo: Koolpad Qi

Before considering the models of smartphones, which are equipped with the possibility of wireless charging, it is necessary to understand its essence. In fact, the wireless energy transmission is not such a complex technology, as it seems at first glance. In technical terms, wireless charging is represented by two copper coils.

One plays the role of the energy transmitter that receives from electrical network. A coil is installed in the docking station (the platform to which the smartphone is subsequently placed). The second coil is a receiver. It is equipped with devices that need energy, such as cell phones. As a rule, the receiver is hidden from the eye inside the case, if only not external.

Energy battery device obtains due to the magnetic field, which occurs when the receiver turns out to be in the transmitter field (usually about 4 centimeters). This principle is valid for the QI standard, which is most actively used in wireless charging of wearable devices.

Smartphone with the Qi icon supports wireless charging

The Qi standard is designed by a consortium of wireless electromagnetic energy for energy transmission at a distance of up to 4 centimeters. Scientists, creating a standard, used the developments that have already been made by many other specialists.

In general, the idea of \u200b\u200btransmitting energy at a distance appeared two centuries ago, when Marie Ampere opened the law, proving that the electric current produces a magnetic field. A considerable contribution was made by Nikola Tesla, which to demonstrate the wireless transmission of energy built a tower. Subsequently, many organizations and scientists were engaged in studying technologies, but a large percentage of experiments ended in the early stages.

Until this century, energy transmission without wires remained at the level of testing. While the technology did not become interesting major producers portable electronics. In 2009, after the creation of the Qi standard, which became most suitable for use in the wearable technique, a number of companies began to develop concepts with wireless charging.

The impetus for firms was the fact that the standard was free and accessible. Today almost everyone flagship smartphone It can boast the availability of technology, and budget - accessories that make the function of working and for them.

No ten companies are working on other energy transmission technologies, in addition to electromagnetic induction. For example, students of Pennsylvania University in 2011 conducted experience in which they proved that energy can be transmitted by ultrasound. And in 1945, the Soviet scientist Semyon Tetelbaum in the article described the possibility of transmission of energy using microwave radiation. Subsequently, this technology has been actively developed. You can transfer the energy with a laser beam that NASA has proven in experiments. Nikola Tesla, famous for his experiments with electricity, and at all believed that it was possible to create a worldwide wireless systemwhich will save people from power lines.

List of smartphones, with built-in support for wireless charging (2019)

Well, with the theory and history of wireless energy transmission, you are now familiar, it's time to go to devices that support technology. Speaking of support, refer to the list of devices that received the receiver already at the factory (you can install it and separately).

To date, more than 80 smartphones received wireless charging according to the QI standard, not counting a number of smart clock models and other devices. And this figure grows with an enviable speed. I will try to list the maximum models - the exact list that is regularly updated is presented on the Qi portal.

So, wireless charging is integrated in models (the list is updated in January 2019):

Apple.

iPhone 8.
iPhone 8 Plus.
iPhone X.
iPhone XS.
iPhone XS Max
iPhone XR.

ASUS.

ASUS Padfone S.

BlackBerry.

BlackBerry Passport.
BlackBerry Priv.
BlackBerry Z30.

Casio.

Casio G'z One Commando

Caterpillar.

CAT S50.
CAT S50C.

DeWalt.

Dewalt MD501.
Dewalt Mil810g.

Energy Sistem.

ENERGY PHONE PRO QI

Fujitsu.

Fujitsu Arrows F-09D
Fujitsu Arrows Kiss F-03D
Fujitsu Arrows Kiss F-03E
Fujitsu Arrows X F-10D

Google

Google Nexus 4.
Google Nexus 5.
Google Nexus 6.
Google Pixel 3.
Google Pixel 3 XL

HP.

HP elite x3.

HTC

HTC Droid DNA
HTC Windows Phone 8x

Huawei.

Huawei Mate.20 pro.

Kyocera.

Kyocera Brigadier
Kyocera Duraforce.
Kyocera Hydro Elite.
KYOCERA TORQUE G02.
KYOCERA TORQUE KC-S701
Kyocera Urbano L01
Kyocera Urbano L03.

LG.

LG G2.
LG G3.
LG G6 ¹
LG G6 Plus ¹
LG G7.
LG G7 Thinq.
LG LUCID 2.
LG LUCID 3.
LG Optimus F5.
LG Optimus G Pro
LG Optimus IT L-05E
LG Spectrum 2.
LG VU 2.
LG VU 3.
LG V30.
LG V30 Plus.

M.T.T.

M.T.T. Master 4G.

Microsoft.

Microsoft Lumia 950.
Microsoft Lumia 950 Dual SIM
Microsoft Lumia 950 XL
Microsoft Lumia 950 XL Dual SIM

MLAIS

MLAIS MX69W.

Motorola.

Motorola Droid Maxx
Motorola Droid Mini.
Motorola Droid Turbo.
Motorola Droid TURBO 2
Motorola Moto Maxx
Motorola Moto X Force

mPhone

mPhone 8.

Nec.

NEC Medias PP N-01D
NEC Medias X N-04E

Nokia.

Nokia Lumia 1520.
Nokia Lumia 735.
Nokia Lumia 830.
Nokia Lumia 920.
Nokia Lumia 928.
Nokia Lumia 929 (icon)
Nokia Lumia 930.
Nokia 8 Sirocco.

Oukitel.

Oukitel U23.

Panasonic

PANASONIC ELUGA P P-03E
Panasonic Eluga V P-06D
Panasonic ELUGA X P-02E
Panasonic Eluga X1.
Panasonic ELUGA X1 Pro

Philips.

Philips x723.

Razor

Razor Phone 2.

Ruggear

Ruggear RG730.

Samsung

SAMSUNG GALAXY S6.
SAMSUNG GALAXY S6 Active
SAMSUNG GALAXY S6 EDGE
SAMSUNG GALAXY S6 EDGE PLUS
SAMSUNG GALAXY S7.
SAMSUNG GALAXY S7 Active
SAMSUNG GALAXY S7 EDGE
SAMSUNG GALAXY S8.
SAMSUNG GALAXY S8 Active
SAMSUNG GALAXY S8 Plus
SAMSUNG GALAXY S9.
SAMSUNG GALAXY S9 Plus
SAMSUNG GALAXY NOTE 8
SAMSUNG GALAXY NOTE 9
SAMSUNG LEADER 8.
Samsung w2016.

Saygus.

Saygus V Squared.

Sharp.

Sharp Aquos EX SH-04E
Sharp Aquos sh-07d
Sharp Aquos sh-13c
Sharp Aquos Slider SH-02D
Sharp Aquos Zeta SH-06E
Sharp Aquos Zeta SH-09D
Sharp Q-Pot SH-04D
Sharp SH-05D

Sony

Sony Xperia. Z3v
Sony Xperia Z4V.
Sony Xperia XZ2.
Sony Xperia XZ2 Premium
Sony Xperia XZ3.

Techdy.

Techdy Basic Bear.
Techdy Bear Pr.

Vertu.

Vertu aster
Vertu Signature Touch.

Xiaomi.

MI MIX 2S.
MI MIX 3.

Yotaphone.

Yotaphone 2.

ZTE

ZTE TELSTRA TOUGH MAX
ZTE Axon 9 Pro

This is not a complete list - there are some more models from less well-known firms. Do not be surprised that not in the list popular iPhone . It's not a mistake. Officially, Apple has not yet integrated wireless charging into its products. But there is a way out, about what is slightly lower.

For models of smartphones presented in the list, only the presence of a platform that is necessary for energy transmission is required. As a rule, it is included in the package mobile deviceBut not always. In this case, the docking station will have to buy separately.

Usually, the manufacturer releases the branded model, but others can also be used - there are no special binding of the smartphone to a specific area. You can also order a cheap "noname" docking station, which in most cases will satisfy the buyer's requests.

What if the smartphone does not support wireless charging

If not found in the list of supported smartphones of your device, do not hurry to get upset. There is an exit. More than two of them. So, maybe your phone hit those for which receivers are specially produced (small plates with built-in circuit) for wireless charging. This list includes rather popular, but order outdated models. There are exceptions, such as iPhone 7.

And popular, and not outdated, and the manufacturer did not integrate the receiver. Receivers intended for certain models receive a corresponding designation as well the desired characteristics. For example, such receivers for Samsung Galaxy S 5 or older solutions have unusual contactscorresponding to the fact that there is under the lid of devices. Here are the most popular models that have received special receivers:

iPhone: Starting with the Quartet.
SAMSUNG GALAXY: S3, S4, S5; Note 2, 3, 4, EDGE.
LG: G4, V10.
Sony: Xperia z3 + / z4; Experia Z5; Experia Z5 Premium.
Huawei: Ascend Mate 7, Mate S.

The receiver to these devices usually comes with a docking station. You can buy parts separately - there is no binding. In addition to boards (receivers), there are also special covers for wireless charging devices that inside themselves contain contour from copper. For each smartphone is made by the corresponding form cover.

Universal solutions

Devices supported by wireless charging is becoming more and more, but the manufacturers are not in a hurry to "deliver" technology into a budget segment. And he is most popular. Especially cheap smartphones are loved in China, where they came up with universal receivers for any model.

Kit docking station + receiver costs about 500-700 rubles (can be found and cheaper), the main thing is to choose correctly for your smartphone. We pay attention to the form and connector. The universal receiver can be found almost for any smartphone.

Dock Station

Photo: Wireless charging for iPhone

So, dealt with the support of wireless charging with smartphones. Now I would like to stop separately on the platforms that are used to transmit energy to the device. What for?

Unlike receivers that are either hidden inside the phone, or are a faceless plate, the docking station allows the user to choose a model for himself. Some companies are at all provide original solutions that will become part of any interior.

A docking station for wireless charging from Samsung, made in oval form, is particularly popular. It is suitable not only for charging the company's smartphones, but also for most other models.

Of the features it is worth highlighting support automatic shutdown With full charge of the device, as well as light indication. The average cost is 2000 rubles, but in Chinese online stores you can find a cheap replica for 400-700 rubles.

Woodpuck Fast Edition Bamboo site is interesting and made of wood. The manufacturer, so to speak, combined modern technologies and natural materials. The functionality does not differ from other docking stations, but it looks bother. Cost - 40 dollars.

But the AuKey Qi boasts compact dimensions that allow you to charge with you. Yes, and the price is low - 30 dollars. Fans of purchases from China and at all the choice of huge catalogs are presented, in which it is not difficult to choose a cheap and most beautiful docking station.

Photo: Designo Curve MX34VQ

Of unusual stands For wireless charging, you can highlight a new ASUS - Designo Curve MX34VQ TV. More precisely, the leg on which it is worth. It is performed in the form of an oval site, on which a smartphone is put on for charging. It has even backlight. Asus, following the modern trend, made a new device not only beautiful, but also useful. True, the price is "biting".

Outcome

You can confidently declare that the list of devices supported by the wireless charging will only grow. The technology capable of getting rid of the heap of wires is interesting and user, and the manufacturer, which for its presence receives additional income.

After a couple of years, wireless charging will probably support each smartphone. In addition, no tens of companies work on the development of even more advanced technology, which will not be tied to the docking station. To us, simple users, it remains to wait a bit to forget about the main problem portable devices - attachment to the outlet.

Have the ability to wireless charging: the flagship model is charged by the air "out of the box", and for Lumia 820 it is necessary to purchase a shift case with the possibility of wireless charging.

The world has already been shown devices with wireless charging, such as the TouchStone charger for Palm Pre, Powermat for iPhone, induction charging from Energizer. But unlike these charges created by its own specifications, which means incompatible with other devices, we use the QI standard - the only globally adopted wireless charging interface created by the Wireless Power Consortium consortium consisting of more than 100 different companies.

Standard qi. Created for energy transfer various devices Using magnetic induction. Technically, it is very similar to the solution that is used to charge electrical toothbrushes.

How it works?

Simple words, the base station consists of an induction coil, which creates an electromagnetic field when an alternating current is received. In the device that needs to be charged is a similar coil, able to capture this field, converting the resulting energy in d.C.used to charge the battery.

If we consider the process in more detail, then in wireless charging transmitter ( transmitter.) Consists of a current converter ( aC-DC Power Converter) defining devices ( drivers.) transmitting the coil ( tRANSMIT COIL.), potential and current reading ( vOLTAGE AND CURRENT SENSING) and controller ( controller). Receiver ( receiver.) Contains the resulting coil ( receive Coil.), rectifier ( rectification.), voltage regulator ( voltage Conditioning) and the controller ( controller).

The energy is transmitted from the transmitter to the receiver through the interconnected magnetic field, which occurs during the flow of AC via the transmitter coil. If the coil of the receiver is in close proximity, much of the power transmitter lines will pass through the coil of the receiver, creating an alternating current in the receiver, which is then converted into a constant voltage.

View interactive presentation with detailed description Technologies can be on WPC.

The charger may consist of several transmitting coils that are activated depending on the position on it the devices that must be charged.
The Qi standard supports data transfer protocol between charging and charged devices at 2 Kbps velocity. Now on this protocol from the charged device is transmitted information about the required level of electricity for full charge, as well as reports that the device charged.

Energy Efficiency

The energy efficiency of Qi wireless charger is approximately 80%. It is worth understanding that energy efficiency is 100% simply impossible to achieve, in standard wired chargers, this indicator is from 75% to 95% at best.

Safety

As for the safety of wireless charging devices, we can state that we use non-ionizing frequencies that do not have harmful physiological impact. The QI 1.1 standard includes discovery of foreign objects in the charger's action field, providing additional safety; Charging is possible only with Qi-compatible devices. Also, our chargers and smartphones have built-in safety mechanisms based on a thermal control.

Future wireless charging

After the publication of the low-power (five watts) QI specification in August 2009, in 2011, Wireless Power Consortium began working on the expansion of the specification to middle power, allowing you to increase power up to 120 watts. Despite the fact that the first specification is enough to charge phones, new standard Qi will be able to provide not only the charging of smartphones, but also, for example, requiring greater power of the tablets.

Thanks to the Wireless Power Consortium ecosystem of wireless chargers develops in a very rapid rate. So, we have concluded contracts with Virgin Atlantic and The Coffee Bean & Tea Leaf, where soon all the tables will be equipped with built-in charging devices: the phone will simply be charged on the table while you drink your coffee. In Russia, we also negotiate cooperation with various businesses in order to implement the same tables with wireless chargers in their establishments as soon as possible.

In addition to the main charger -

To date, we are already hard to present your life without mobile gadgets. This led to the fact that a huge number of wires accumulate near home sockets, among which it happens not so easy to find the necessary "charging". In this case, the problem will help solve a wireless charger. The principle of his work is very simple - just put the gadget on a special panel so that it charges. The accessory is based on the principle of operation of the induction coil. This technology is called Qi. It becomes very popular in lately. In 2015, the worldwide popular brand began selling furniture in which the Wireless Charging Module will be built. Today, all flagship models of smartphones support Qi. It is expected that in a short time transmitters or, in other words, modules can be found at airports, restaurants, cinemas, fast powdes, shopping centersthat will allow charging phones and tablets at any time. In fact, it will facilitate the life of users of mobile gadgets. We enter a new era, where it is not necessary to carry with you everywhere for all the devices we use.

Wireless charger for gadgets with QI technology support

The wireless power standard is called Qi. In Russian, the word is pronounced as "qi". This name is standard in honor of the term Eastern Philosophy. It is designed by a WPC wireless electromagnetic energy consortium. This organization combines world electronics manufacturers and sets an important task - to standardize the process of charging gadgets by the induction method.

In the near future, all devices can be charged without connecting to the network. It is incredibly convenient. Each of us at least once came across the situation when. It is urgent to look for a way out. Soon, wireless charging modules will appear in all public places, as well as at home for each user. At home, you can simply place the module in a convenient location, and it will never lose, unlike the wired "charging". It is enough just to put a gadget on it and wait a bit, while the battery capacity is replenished.

The principle of operation of the wireless "charging" is based on the properties of the induction coil to transmit an electric current. In the school course of physics, we were taught that when connecting an induction coil to a power source in it, perpendicular to the coil to turns, a magnetic field occurs. Thus, if you arrange two coils in the radius of the magnetic field, and at the same time connect one of them to the power source, the voltage will appear in the second coil. At the same time, it is important to take into account the fact that two induction coils in no way should come into contact with each other. Such a simple principle is included in the work of wireless charger supporting Qi technology.

There are two varieties of QI standard. The first implies charging at low power - 5 watts, and the second - when high power - 120 watts. Qi high power is now not produced by manufacturers due to objective factors. Using QI for 120 watts, you can charge the laptop. Qi on 5 watts is used to replenish the capacitance and telephones. It should be noted that various current for the tablet and smartphone is necessary. The wireless charger for the phone creates a current strength in 1 amp, and for tablet computer - 2 amps. When choosing an accessory, be sure to pay attention to such characteristics.

Energy Efficiency of the QI standard

The modern wireless charger consists of two components. One of them is built directly in the gadget that supports QI and is called a wireless charging receiver. In fact, it is a receiver that conducts electric current to the battery. The second component is called a transmitter. If the purchase of a wireless "charging" is implied, it's about transmitter. They are of various shapes and sizes. Mainly distributed round and rectangular transmitters.

To better understand how a wireless charging is working, it should be noted that the magnetic field is able to transmit not only the electric current, but also data on bytes and bits that the developers of the Qi standard took into account. The interaction between the coils will occur only at the moment when the gadget with the built-in transmitter will be near the transmitter.

If the accessory for charging the gadget will function in the background, the pulse sent every 0.4 seconds by the transmitter will not change the voltage in the coil embedded in the transmitter. It can be concluded that the modern accessory knows how to recognize, in what mode function. As soon as the smartphone will be near the distance of several centimeters, the voltage in the induction coil will sharply decrease, and the device will switch to the active work mode. As soon as the smartphone battery is charged, the corresponding signal will translate the charger into the background mode. It can be concluded that modern wireless accessories for replenishing the battery capacity are energy efficient.

Is the Qi technology safe?

Some users mistakenly believe that the QI wireless charging function can harm health. The fact is that magnetic radiation is not ionizing. In its influence on the body it looks like a signal mobile communications, Radio signal. In this case mobile networkwhich comes from the tower is stronger and has a continuous character, while electromagnetic radiation disappears immediately after charging the smartphone battery.

The power of wireless charger is 5 watts. It is not enough to have an impact on the human body. ABOUT negative impact You can only speak when the power of such devices will be equal to 120 watts. But such models are not produced on an industrial scale. This explains the absence of wireless chargers for laptops. It is important to know that the battery wireless charge technology has long been used in many models of electric rates and electric dental brushes, which once again proves its safety.

What smartphones support the function of a wireless charging?

First of all, we want to note that not all gadgets today support the function of a wireless charge. Apple intentionally supplies products to the market, which is incompatible with Qi. In this case, we recommend purchasing special case with built-in induction coil.

Flagship devices mainly always support Qi technology. These include such popular smartphone models like Samsung Galaxy S6, Sony Xperia Z4V, Samsung Galaxy S6 Active, Google Nexus 6, Motorola Droid Turbo, Nokia Lumia 930, Samsung Galaxy S6 EDGE. Already dozens of models most different manufacturers You can charge using a wireless accessory, which ensures maximum use of use for users.

Is it possible to make a wireless charging personally?

Wireless chargers have enough high cost, given that they are a conventional induction coil. The question arises: "How to make a module with your own hands?". In principle, if you have knowledge of the foundations of physics and special equipment for measuring force and power electric currentThis will not be a big problem. Radioelectronics fans are capable of collecting and not such simple devices, but we do not recommend regular users to conduct similar experiments.

Aliexpress.com offers separate receivers wireless devices For some models of smartphones, among which the ruler, Google Nexus. It is enough just to install it. Under the lid at the device there are two contacts that provide a positive and negative pole. It is enough to buy and connect the receiver, after which you can spend a test wireless charging. Such an output is optimal if you somehow have a wireless charger, for example, you were presented with a gift, and your gadget model does not yet support the Qi function.

Battery charge wireless technology is gaining increasing popularity in the modern world. In the future, in many public places it will be possible to fill the capacity of the battery. It is expected that stadiums, parks, restaurants, cinemas, fast foods will be equipped with wireless charger. When buying smartphones, we recommend paying for the support of the Qi function, which is present in all flagship models 2015.

Nowadays, a person without a smartphone is a man, torn away from life. It is difficult to imagine that a few years ago a mobile phone was used only for communication. Now this little assistant gives us both access to the Internet and a variety of applications, and wakes us in the morning. The list of products provided by a smartphone can continue infinitely. It is not surprising that for modern phones invented a large number of gadgets. One of them is a wireless charger, which we would like to talk in more detail.

How to determine whether the phone supports wireless charging?

It is clear from the name that it is a gadget that allows you to charge a smartphone without the use of wires. It is a small stand connected to the network. Inside there is an induction coil, which creates a small magnetic field around itself. If a smartphone will be located within the radius of this field, then it will receive electricity in the literal sense of the word by air. But there is one nuance - an induction coil should also be built in the smartphone. It will serve a kind of energy receiver from the charger.

The purpose of creating this device was to get rid of modern smartphones from the charger connections, and also allow all devices in the house to charge from one platform. The idea was successful, but why then we do not see this technology in every home and do not use it yourself? The answer is simple - despite all the advantages, this miracle device has a cons.

Pros and Cons Wireless Charger

Pluses the wireless charging is enough, but they all have their own cornerstone.

No wires

Without a doubt, this is a big plus. Wires have always been a weak place in charging. With frequent beggars, the wire is easily damaged and confused. Frequent recharging loosened a USB port in the phone, and sooner or later repairs required. But there is I. back side Medals. Refusal of wires reduced the efficiency (efficiency) from 90% to 60-75%. Simply put, when using wireless charging, your smartphone will be charged longer than about 2-3 times.

Land of use

It would seem that there are no wires - there are no restrictions, and you can charge the phone just being in the apartment. But no - the radius of using a wireless charger is very modest (3-5 cm) and the phone will have to put on the stand. Another significant disadvantage will be the impossibility of using a smartphone during charging.

Price

The cost of the charger is quite variable, but it will always be more expensive than the charging us.

Standards

I would like to tell about the standards, thanks to which the use of electricity transmission technology by air was possible.

Qi ("Qi", in honor of the term Eastern Philosophy) developed WPC (Wireless Power Consortium - Consortium of Wireless Electromagnetic Energy). It is the most common and maintained by such giants of the mobile industry as Asus, Motorola, HTC, Huawei, LG, Nokia, Samsung, Blackberry, Sony and others. You can read more details with the standard and list of supported devices on their official website.

The PMA standard also uses the principle of electromagnetic induction, but cannot boast such a big list of manufacturers supporting their technology, like Qi. It was developed by Powermat, which is this moment Trying to fight unhealthy competition from Qi.

This standard uses Rezency technology, which is radically different from PMA and QI. It is strange that the most unpopular standard has many advantages, in comparison with their competitors. The advantages include:

the possibility of charging through the interference (if you put the book between the smartphone and the charger, nothing will change);
one platform can provide energy to several devices;
work in close proximity to metal objects, etc.

Acquainted with full list Smartphones that can use wireless charging directly from the box, on the official website https://www.wirelesspowerconsortium.com. I would like to note that most of the manufacturers make sure that their product supports the use of this technology.

How to be if your smartphone is not in the list of supported devices, and you need to use the wireless charging? If you have had such a question, then most likely you are happy apple products. While the iPhone does not provide for the possibility of receiving electromagnetic signals. However, there is an alternative - the acquisition of auxiliary accessory, which will do it for your phone. It is placed under a standard case and does not cause any discomfort.

Is wireless health charging

Like any new technologyThe wireless charger causes many questions. One of the most sharp - does it make harm to health. Immediately dispel this controversy myth. It will cause you no more harm than an electronic razor working on the same technology. The developers of the WPC standard themselves also argue.

We hope our article was helpful and helped to deal with the compatibility of your smartphone and a wireless charger.