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这种技能太高冷：你用过无线充电手机吗

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这种技能太高冷：你用过无线充电手机吗

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Time of issue:2015-04-13 00:00
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十九世纪九十年代，尼古拉·特斯拉发明了“特斯拉线圈”，能够通过空气传播电力，开启了无线充电时代。但尼古拉·特斯拉先生没有想到的是，一百多年后，无线充电技术的最大受益者实际是电动牙刷，这结果确认令人沮丧。虽然无线充电技术在近年来被广泛关注，但至今仍未在消费电子领域得到普及。

　　然而，三星旗舰Galaxy S6的发布，再一次将无线充电技术引入了众人的视线。早在发布之初，Galaxy S6就凭借着出色的外观和强悍的性能得到了一众好评。但最值得关注的，还是三星为新机搭载的无线充电技术。相较于快速充电，无线充电技术颠覆了传统的充电模式。事实上，在电动汽车与智能家居开始发力的今天，不难想象无线充电技术在未来将扮演怎样重要的角色。那么今天，小编就和您聊聊无线充电技术。

如今国际上有三大主流的无线充电标准，分别是WPC推出的Qi标准，Duracell Powermat推出的PMA标准以及高通、三星及Powermat一起推出的A4WP标准。如今A4WP标准语PMA标准已经合并，所以说两大标准也未尝不可。

　　Qi标准：

　　Qi标准是全球首个推动无线充电技术的标准化组织——无线充电联盟(WPC)推出的无线充电标准，其采用了目前最为主流的电磁感应技术，具备兼容性以及通用性两大特点。只要是拥有Qi标识的产品，都可以用Qi无线充电器充电。而因为解决了通用性问题，在不远的将来手机、相机、电脑等产品都可以用Qi无线充电器充电，为无线充电的大规模应用提供了可能。

早年对Qi标准最活跃的厂商，就是被收购的诺基亚。先前的Lumia920等旗舰机上采用的都是Qi标准。只是随着Lumia手机主攻中低端市场，很难再见到无线充电的身影了。

PMA标准是由Duracell Powermat公司发起的，该公司由宝洁和无线充电技术公司Powermat(也是A4WP技术的支持成员之一)合资经营，拥有较出色的综合实力。该公司曾经推出的一款WiCC充电卡，比SD卡大一圈，内部嵌入了用于电磁感应式非接触充电的线圈和电极等组件，厚度较薄，插入现有智能手机电池旁边即可利用。

　　如今AT&T、Google和星巴克三家公司已经加盟了PMA联盟。星巴克及宜家等提供的无线充电大都支持PMA标准，对消费者而言十分便捷。

同PMA标准合并的A4WP标准，由高通、三星以及Powermat公司共同创建的无线充电联盟建立，其目标是为包括便携式电子产品的和电动汽车等在内的电子产品无线充电设备设立技术标准和行业对话机制。

　　A4WP标准：

　　因为背靠高通及三星这两棵大树，A4WP标准是未来最有可能成为主流的标准，更不用提如今同PMA标准合并之后的生态影响力。试想未来高通在处理器中整合无线充电模块，加上三星在手机市场的影响力，成为主流只是时间问题。

只有竞争的市场才能造就无限的新技术。除了上述的三大标准外，还有一些新生的初创公司也在无线充电领域大有作为，如以色列的Wi-Charge，美国的WiTricity以及Energous公司。

　　以色列的Wi-Charge公司的充电系统利用的是红外光无线充电技术。利用天花板上的发射机将能量转化为红外光，这些光可以覆盖发射机下方约50平方米的范围。电子设备上附带或内置的接收机可以捕捉红外光，再将其转化为能量。利用该项技术，可以为房间中的所有设备同时充电。

　　Energous公司的WattUp技术可以通过空气传播能量。它采用了类似WiFi的5.7GHz和5.8GHz频段在无线接收器间传输能量。同时，蓝牙技术的应用可以让发射器及接收器直接扫描设备，实现更精准的定位和传输接收效果。

WiTricity以磁场共振技术来实现无线充电，最远距离达到了2.4米，可以为多个设备同时远距离充电，还可以穿透墙体、木头等障碍。共振是自然界极为平常的现象，只要两个物体震动频率一样，就会发生能量的交换，WiTricity技术利用的就是这一原理。也是得益于共振技术，WiTricity相对于电磁辐射等无线充电技术最为安全。

　　既能做到充电设备的相对隐形，又能降低设备的磨损率，有着较大的应用范围且操作方便，那么无线充电又为什么没有普及呢？

　　就消费者而言，传统的有线充电方式已经根深蒂固，如今有线充电已经发展的十分完善，能量转换率极高。近期快速充电技术的运用更是发挥了有线充电的优势。相比于新鲜的无线充电，消费者更愿意选择熟悉的方式。而且，想要享受无线充电，消费者还必须购买无线充电板，又是一笔额外的花销，得不偿失。因此除了发烧友外，很难有消费者愿意去尝试。

　　就厂家而言，目前无线充电模块的成本较高，因此只能用在旗舰机上，无形之中就拉开了无线充电的受众人群，脱离了广大“群众”。而如今手机正向轻薄化发展，加装无线充电模块必然会增加手机的厚度，不太符合当前手机厂商追求的设计原则。假设必须提高厚度，反而不如提高电池容量来的实在。

就成熟度来看，目前无线充电技术也不适合大规模应用。想要做到大规模的无线充电，必然要投入巨大的成本且维修费用极大。实施大规模远距离的传输，设备的耗能必然加大。距离越大，能量损失越大。考虑到电磁能量转换率本身就不高，因此目前只能做到超短距离的点对点充电，大规模使用还有极长的路要走。

　　无线充电技术代表着未来，就像用移动电话与有线电话，WiFi与固网一样，性能上看无线终不及有线强大，但在普及性和实用性方面无线技术已然主流。宜家已经开始在家具之中加装无线充电模块，允许用户直接使用。可以预见在智能家居以及电动汽车的发展的浪潮之中，无线充电必会有更大的发挥空间。或许应了这句话，人生是有限的，但生活，注定是无“线”的。

Previous: 2024年无线充电设备出货量将超20亿组较今年增逾15倍

Next: 最新研制成功新型无线充电方案

Previous: 2024年无线充电设备出货量将超20亿组较今年增逾15倍

Next: 最新研制成功新型无线充电方案

How is the intelligent wireless charger scheme developed 2022-04-11 09:37:47

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!

Scheme of electromagnetic induction intelligent wireless charger 2022-03-25 08:57:03

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!

Circuit analysis of wireless charger 2022-03-10 09:07:45

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!

Which domestic manufacturer of wireless charging chips is better? 2022-02-23 09:01:39

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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