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21

2022-03

Smart home case

Smart home case

Electronic desk calendar plus alarm clock wireless calendar thermometer

21

2022-03

Car navigation magnetic suction wireless charging

Car navigation magnetic suction wireless charging

Car navigation magnetic suction wireless charging

21

2022-03

Six in one multifunctional mobile phone wireless charging

Six in one multifunctional mobile phone wireless charging

Six in one multifunctional mobile phone wireless charging

21

2022-03

Multifunctional three in one wireless charging

Multifunctional three in one wireless charging

Multifunctional three in one wireless charging

10

2022-03

Circuit analysis of wireless charger

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!

23

2022-02

Which domestic manufacturer of wireless charging chips is better?

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.

25

2021-11

Technical analysis and application introduction of automobile wireless charging solution

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.

15

2021-11

Basic knowledge of automotive wireless charging solutions

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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