Industry news_News_Shenzhen Blande Technology Co., Ltd.|Full range of wireless charging solution

11 2022-04

How is the intelligent wireless charger scheme developed

The intelligent wireless charger scheme has the functions of automatic induction charging and intelligent power-off after full charging. It is not only suitable for electronic products with various charging voltages and capacities, but also can charge multiple different electronic products at the same time. The work adopts the design idea of intelligent wireless charging, which has the advantages of convenient use and wide application, and has high promotion and application value. Then, let's learn how to develop the scheme of intelligent wireless charger! Introduction to intelligent wireless charger scheme With the rapid development of electronic technology, the number of global mobile phone users has reached 3.3 billion. With MP3, MP4 and other peripheral electronic products, less than two people have mobile phone electronic products that need to be charged on average. At present, cable connection charging is widely used. The cable interface of this charging mode will usually have poor contact and other phenomena after long-term use. Moreover, a charger is not widely applicable, and different chargers need to be used according to the types of electronic products. It is very troublesome to find a suitable interface and wiring when charging. Charging all kinds of portable electronic products is an annoying trouble. In order to improve the above phenomenon, it is necessary to develop intelligent wireless charger. Working principle of intelligent charger The intelligent charger uses the principle of electromagnetic induction. In the non-contact charging system, it uses wireless transmission mode to charge, rather than wire (charging line) to transmit power. There is no physical interface for charging. Compared with general chargers, it avoids the trouble of inserting wires and pulling out batteries, and has the working principle of general chargers; The work adopts the design idea of one (charger) to many (inductive load) charging and intelligent charging; After the wireless charger charges the load, the indicator light will change from green light to seven color light, and the mobile phone can correctly display the charging state to intelligently complete the charging process. The experimental product is mobile phone. Advantages of Smart Wireless charger scheme: 1) Low cost The circuit is composed of a pulse generation unit, a power amplification unit, a filter unit, a comparison unit and a transmitting and receiving unit. Each unit is composed of several small components, which is simple to make. 2) One to many charging One charger can charge multiple loads. Each household can use one charger for the whole family. With the increase of load, the work efficiency will be improved, which can not only save electricity but also reduce unnecessary costs. 3) Convenient Compared with ordinary chargers, it not only reduces the trouble of plugging in and out, but also avoids the phenomena of inappropriate connector and poor contact. The elderly can also use it easily. 4) Intellectualization The intelligent wireless charger scheme can automatically conduct inductive charging as long as the inductive load is placed on the charger. Through information feedback, after the inductive load is fully charged, it can automatically turn off the power supply to realize the intelligence of the charging process. The smart wireless charger scheme will greatly improve our life. With the popularity of wireless charging technology, people can charge all devices with one charger. Moreover, with the popularization of this technology, wireless charging transmitters can be easily found in all places where we live, live and work. Charging transmitters can also be installed in cars, planes, hotels and offices. This means that people can charge their appliances anytime, anywhere without carrying wires. The above is how to develop the intelligent wireless charger scheme. If you need more information, please feel free to contact us!

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25 2022-03

Scheme of electromagnetic induction intelligent wireless charger

With the rapid development of electronic technology, the number of people using smart phones in the world is increasing. By 2017, 69% of the world's people will use smart phones. At present, cable connected charging is widely used. The cable interface of this charging method will have poor contact for a long time. Moreover, a charger is not widely applicable. Different chargers need to be used according to the types of electronic products. It is very troublesome to find appropriate interfaces and wiring when charging. The charging of various portable electronic products is a headache. In order to improve the above phenomena, we need to develop a smart wireless charger scheme. Now let's learn about the electromagnetic induction Smart Wireless charger scheme! The wireless charger scheme uses the principle of electromagnetic induction. After 1N4148 rectification and filtering, the voltage U1 is compared with the reference source uo. During charging, the current of the transmitting coil increases with the increase of inductive load. The load voltage of 0.33 Ω is amplified by 23 times through the operational amplifier, the green light is on, and there is no inductive load after 10 seconds, so it will shut down automatically; Press the reset button, U1 is much brighter than uo colorful light, indicating that it is charging; When no-load or full charge, U1 is less than uo, and the charger will restart. The specific circuit analysis is as follows 1) When switch S2 is disconnected, the charger is in intelligent charging as a whole. The colorful lamp flashes and UI reaches a high level. At this time, Q5 is saturated, and the voltage uceq is 0.67v, which is lower than the sum of the on voltage of Q2 and Q4 (1.34v). Q2 and Q4 constitute Darlington and cut off at the same time. After the charger is started, relay K1 is closed and K2 becomes closed at the same time. When there is inductive load, Q3 is cut off at this time, and capacitors C5 and R9 form an RC charging circuit. When the capacitor charging voltage reaches the on voltage of Q2 and Q4, Q2 is turned on to saturate Q4. When relay K1 is fully charged by the adsorbed inductive load or there is no inductive load, the green light is on, that is, UI is low level. Click the reset switch and the charger will restart. When the inductive load is fully charged (or no inductive load), the capacitor C5 is charged. At this time, after the relay is powered off, the relay K2 is closed. At this time, C5 and R13 form an RC discharge circuit to give C5 rapid discharge. Its voltage is ut. 2) During S2 shutdown, the whole charging circuit is in the process of manually cutting off the power supply. The wireless charger has the functions of automatic induction charging and intelligent power-off after full charging. It can also charge a variety of different electronic products at the same time. It is not only suitable for electronic products with various charging voltages and capacities. The wireless charger scheme summarizes the following advantages. 1) Low cost The circuit is composed of a pulse generation unit, a power amplification unit, a filter unit, a comparison unit and a transmitting and receiving unit. Each unit is composed of several small components, which is simple to make. 2) One to many charging One charger can charge multiple loads. Each household can use one charger for the whole family. With the increase of load, the work efficiency will be improved, which can not only save electricity but also reduce unnecessary costs. 3) Convenient Compared with ordinary chargers, it not only reduces the trouble of plugging in and out, but also avoids the phenomena of inappropriate connector and poor contact. The elderly can also use it easily. 4) Intellectualization As long as the inductive load is placed on the charger to realize the intellectualization of the charging process, it can automatically inductive charging. Through information feedback, after the inductive load is fully charged, it can automatically turn off the power supply. The above is the scheme of electromagnetic induction intelligent wireless charger. If you need more information, you can contact us at any time!

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10 2022-03

Circuit analysis of wireless charger

Wireless charging has entered reality from dream and turned from concept to commodity. In recent years, it has led a new trend in mobile phones, electric vehicles and other fields. It proves that wireless charging technology has a very broad market prospect. The following is a micro distance wireless charger circuit scheme. This scheme is a feasibility exploration experiment. Then, let's learn about the circuit analysis of the wireless charger scheme! Scheme and principle of wireless charger The wireless charger scheme converts DC into high-frequency AC, and realizes the wireless power supply through the mutual inductive coupling between the primary and secondary coils without wired connection. The basic scheme is shown in the figure. The wireless charger is composed of power transmitting circuit, power receiving circuit and charging control circuit. Power transmission department The power supply of the transmitting unit of the wireless charger scheme includes 220V AC and 24V DC, which are selected by the relay J. According to the principle of AC priority, the normally closed contact of relay J in the figure is connected with DC (battery BT1). Usually S3 is on. When AC power is supplied, the rectified and smoothed DC adsorption relay J of about 26V acts in the form of AC power supply, the DC power supply BT1 is disconnected from the power transmission circuit, and LED1 (green) emits light to indicate its state. The 24V DC power selected by the relay J is mainly supplied to the transmitting coil L1. In addition, it is supplied to the integrated circuit IC2 after being depressurized by IC1 (78l12). Therefore, in order not to make the action of J affect the stable action of the transmitting circuit, the capacitance of capacitor C3 must be more than 2200uf The wireless transmission of power is actually realized through the mutual inductance of transmitting coil L1 and receiving coil L2, in which L1 and L2 constitute the primary and secondary coils of coreless transformer. In order to ensure sufficient power and as high efficiency as possible, it is appropriate to select a high modulation frequency and consider the high-frequency characteristics of the equipment. Generally, the distance between the receiving coil L2 and the transmitting coil L1 is only a few centimeters, which is close to coaxial, so high transmission efficiency can be obtained. The principle of charging control circuit unit is shown in Figure 2-3. The effective value of 1.6mhz sine wave voltage induced by L2 is about 16V (no-load). After bridge rectification (composed of four 1N4148 high-frequency switching diodes) and C5 filtering, about 20V DC is obtained. As the power supply of the charging control unit. As the prototype of the feasibility exploration experiment, the wireless charger scheme is only for small capacity lithium-ion batteries and lithium polymer batteries of about 100mah. It is suitable for pocket digital products such as MP3, MP4 and Bluetooth headset. There are no obstacles in principle to popularize it into high-capacity batteries. Of course, from laboratory prototypes to market products, there may be long and arduous work such as electromagnetic radiation leakage, cost control and product technology, market entry and consumption start. The above is the circuit analysis of the wireless charger scheme. For more information, please feel free to contact us!

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23 2022-02

Which domestic manufacturer of wireless charging chips is better?

In the face of many wireless charging chip manufacturers, it is not so simple to find a reliable one. In order to avoid cooperation with some informal enterprises. Next, Xiaobian will give you a detailed introduction, hoping to bring help to relevant people. If you are also interested in this topic, you might as well have a look together. Which domestic manufacturer of wireless charging chip products is better? I believe this issue is a topic that many people in the industry are more concerned and interested in. When buying such products, we must find formal enterprises. In this way, there will be security. If you want to ask which one is good, in fact, most companies do very well, and their qualifications are relatively complete, so we only need to meet the basic needs when looking for it. After many investigations and understanding, it is worth mentioning that this wireless charging chip manufacturer was established in August 2012, focusing on the R & D and sales of fully synchronous digital demodulation wireless charging IC. They are also bringing high-quality and convenient perception experience to mobile devices, consumer electronics and other wireless charging products, Since we want to cooperate, we also need to know that the company has sufficient technology R & D and quality control capabilities, and their core R & D team comes from R & D elites of Ti, NXP and St. They have been established for a long time and have a large scale, so they are very good in comparison. If you are still struggling with this matter, you might as well go here and have a look. This manufacturer of wireless charging chip products is very good in all aspects, and it is also very famous. I suggest you call to communicate, so that you can know how their service is. The manufacturer of wireless charging chip products provides global enterprises with high-quality wireless charging IC and technical solutions, which has won the trust and support of customers. The products using their wireless charging scheme are exported to the United States, Europe, Japan, South Korea and other countries and regions. Our company's products are very reasonable. I'm sure you will like them. If your industry needs it, you can order it here. Over the years, we have served our customers with high-quality services and reliable products, returned to the society and won countless honors and praise. Wireless charging chips have been widely used in mobile phones, medical treatment, smart home, digital products and many other fields. And the reputation among consumers is getting better and better. Therefore, if we cooperate with such companies, we will be more assured. The products of wireless charging chip manufacturers have also been sold to many places in the country. The content of the above article is a more formal wireless charging chip manufacturer to share with you. If you see it, you can also share it with friends in need. If you don't understand, you can pay more attention to the website. We will bring more content down. Remember to watch it.

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25 2021-11

Technical analysis and application introduction of automobile wireless charging solution

With the strong support of the government, new energy vehicles have developed rapidly in recent years, and more and more people begin to use electric vehicles as an environmentally friendly way of travel. At the same time, many car manufacturers believe that this is the development direction of cars in the future, and have invested a lot of money in R & D. However, due to the practical obstacles of charging problem, it has not been fully popularized. We know that the important parts of electric vehicles are batteries and charging piles. Due to the short time of research and development of wireless charger, the use of lithium battery can only become another bottleneck. Compared with wired charging pile, wireless charging has many advantages and can adapt to the future development trend of new energy vehicles. Next, Xiaobian will share with you the technical analysis and application of automotive wireless charging solutions. 1. What is the wireless charging solution technology for cars? What is the principle? A: the common induction type, resonance type and microwave transmission type are the wireless charging types currently divided by electromagnetic induction type, but the basic principle is the same on the whole. In other words, the wireless transmission of energy is realized by using the electromagnetic induction of AC electromagnetic field. (1) Inductive radio energy transmission is a relatively mature technology at present. Many mobile phones charge wirelessly, and even our common microwave ovens use the principle. The space of digital equipment is small, the receiving coil is small, and the power of charging equipment is small, so the charging distance is very close (sometimes it needs to contact the charging seat), but the electromagnetic radiation is relatively small. (2) Resonant charging is a charging technology currently being developed by MIT, which is not complicated. They can use electromagnetic induction phenomenon and resonance principle to improve the efficiency of wireless charging. The resonance transmission distance is a little farther than the general induction type. MIT is currently conducting miniaturization research. For electric vehicles several meters long, the technical pressure in this regard is not too great. (3) Microwave transmission appears more in science fiction movies or novels during this period. In fact, it is a good method of wireless power transmission, but it is not practical on a large scale due to the limitations of power transmission. The advantage is long transmission distance. Even the energy transmission between spacecraft and the ground can realize directional transmission (antenna emission orientation). Look forward to the future prospects. 2. Understand the benefits of car wireless charging solutions and wireless charging? Although the popularity of wireless charging piles will take some time, many advantages such as high security, convenient use and easy installation have emerged. Because the wireless charging pile can be installed in a distributed layout, it can not only reduce the pressure on the power grid, but also the electric vehicle does not need to charge a fixed place, with a higher degree of freedom. In addition, the hardware standard of wireless charging is easy to unify. After all, it is not easy to persuade manufacturers to unify the interfaces of wired charging—— More obvious on mobile phones. Each charger is different, but there are only a few wireless systems.

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15 2021-11

Basic knowledge of automotive wireless charging solutions

The development of automotive wireless charging solution technology has been deeply studied and applied in the electronic field. Although it has not been widely used, it has made good achievements in the field of consumer electronics. At present, wireless charging can be divided into three types according to the principle and implementation mode.

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12 2021-10

Comparison of wireless charging single chip microcomputer schemes

　　Wireless charging single-chip technology refers to the technology of charging devices with batteries without wires, using the principle of electromagnetic wave induction and other related AC induction technologies, and using appropriate equipment to send and receive AC signals that induce induction on the sending and receiving sides. Transmission technology, let’s learn about the comparison of wireless charging microcontroller solutions! 　　The research on wireless charging microcontroller technology originated in the 1930s. Michael Faraday discovered the phenomenon of electromagnetic induction, that is, the change of magnetic flux generates induced electromotive force, which generates current in the wire. However, the original idea of wireless power transmission was the idea and experiment of wireless power transmission proposed by Nikola Tesla in the 1990s, known as the father of wireless power transmission. 　　Technical principle 　　From the perspective of specific technical principles and solutions, the current wireless charging technology mainly includes four basic methods: electromagnetic induction type, magnetic resonance type, radio wave type, and electric field coupling type. These technologies are suitable for short-range, medium-range and long-range power transmission, respectively. 　　Comparison of various principle schemes of wireless charging microcontroller 　　At present, the electromagnetic induction type is mature and common. The basic principle is that, as shown in Figure 1, using coils on the sending side and receiving side respectively, an alternating current of a certain frequency flows in the primary coil, and a certain current is generated in the secondary coil through electromagnetic induction, so that energy is transmitted from the transmission side. The principle of electromagnetic induction from the side moving to the receiving side. 　　Magnetic resonance type, also known as near-field resonance type, consists of an energy transmitting device and an energy receiving device. If two devices are tuned to the same frequency, or resonate at a certain frequency, they can exchange energy with each other. It works on the same principle as sound resonance, where coils of the same vibration frequency arranged in a magnetic field can be powered from one to the other. figure 2. The technical difficulty lies in miniaturization and high efficiency, which is considered to be a promising way for electric vehicles to be applied to wireless charging in the future. 　　The radio wave formula is similar to the basic principle of the early ore radio, which is mainly composed of a microwave transmitting device and a microwave receiving device. A typical example is Brown's microwave power transmission system in the 1960s, whose image is shown in Figure 3. The whole transmission system includes three parts: microwave source, sending antenna and receiving antenna; the microwave source has a magnetron, which can control the source to output a certain amount of power in the 2.45 GHz frequency band; the transmitting antenna is an array of 64 slots, and the receiving antenna has 25% collection and conversion efficiency. The mobile wireless charging system of Japan's Ryugu University also uses microwaves with a frequency of 2.45GHz to transmit power, lighting up the police lights of a model police car in motion. 　　The electric field coupling method uses the induced electric field generated by the vertically coupled two groups of asymmetric dipoles to transmit electric energy. The basic principle is to transmit electric energy from the transmitting end to the receiving end through the electric field. This method is mainly used by Murata Manufacturing and has the characteristics of resistance to horizontal offset. 　　The above is the comparison of wireless charging microcontroller solutions. If you want to know more, please feel free to contact us!

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26 2021-09

Automotive wireless charging solution: main methods of automotive wireless charging technology

Wireless electromagnetic coupling technology: vehicle charging solution. Power engineers are no longer familiar with electromagnetic coupling. Transformers use this principle to transfer energy. If the two windings of the transformer are separated, it is wireless power supply in a sense. The charging of electric toothbrush is a typical case, but the electromagnetic coupling mode has great shortcomings. If there is no magnetic core with high permeability as the medium, the magnetic lines of force will seriously diverge into the air, resulting in the decline of transmission efficiency, especially when the two coils are far away. Therefore, it is not suitable for high-power and long-distance wireless power supply.

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