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再也不用“专门找一个时间充电”
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再也不用“专门找一个时间充电”

再也不用“专门找一个时间充电”

  • Categories:Industry news
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  • Time of issue:2015-01-04 00:00
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  星巴克日前表示,将在美国包括Teavana茶吧在内的7500个门店,设立10万个“Powermat Spot”免费无线充电站点,并从洛杉矶海湾区开始试推。今后,消费者将摆脱电源插座,仅需将手机放在桌面的特殊装备上,即可实现手机充电。 “Powermat”外观类似黑色小圆盘,它能持续放出低电,方便消费者在享用咖啡的同时,顺便为随身的各种移动智能终端充电。Powermat于2006年由以色列企业家RanPoliakine创立,公司多年来一直专注于手机与其它设备有线充电转换技术的研发,2011年开始 与金霸王电池合作,推出了一系列针对移动智能终端充电需求的套管、适配器等产品。星巴克店内布设的这款Powermat是其最新出品,它使用了一种被称为 “电磁感应充电”的新技术,该技术可以实现相近物体之间的电力传输,其最大卖点,就是充电时不再需要那根烦人的电线了。
  其实,电磁感应作为无 线充电的基础技术,早就不是什么新鲜事物了,它已经存在了足有100多年,其原理如下:首先,充电座上的电磁感应线圈会形成一个电磁场,这个磁场与另外一 个电磁感应线圈接触后(线圈一般连接在需要充电的设备上),就会向其输送电力。在专家看来,它的工作原理跟用充电座给你的电动牙刷充电没什么不同。
  不过电磁感应技术也有缺点,使它难以成为一种主流技术。首先,每个电磁感应线圈只能给一台设备充电。因此,在如今多设备并存的环境中不免显得低效和不方便。其次,它需要用户把设备的位置放得很准确,才能让线圈启动和保持充电程序。
  对此,RanPoliakine的观点是,推广无线充电技术的关键,并不在于怎样实现最快速或最有效的连接,而在于如何让人们在最需要的地方用上它: “我们试图解决的问题是,如何让消费者整天都能充电。最大的阻碍就是关联性,我们应该把充电点放在哪里?”他补充道:“你最需要这项服务的地方,是在家或 办公室以外的地方。”
  他说的很有道理。把充电点放在星巴克的门店里不失为一个好办法,至少可以避免消费者在咖啡厅里长聊时不得不到处找电源插 口。另外,也可以把它放在机场、酒店或Powermat的充电站里。如果按照充电效率来看,无线充电比不上有线充电。也就是说,用无线充电会花费更多的时 间。不过无线充电的意义就在于可以充分利用碎片时间--你不用拿出电线插入接口,当你不用手机时,放下它就等于给它充电,不用“专门找一个时间充电”。
  各种标准技术眼花缭乱
  不过,无线充电能否成为主流,星巴克说了不算。在这点上,诺基亚的态度很重要。
  作为最早将无线充电技术引入到智能手机领域的制造商,诺基亚英国最近通过卡通短片的形式,再次展现了无线充电技术的魅力。视频中,一对夫妻累了一天回到 自己的卧室,男主人公(使用iPhone)回家后往床上一趟,想着给手机充电,然后到处翻找充电器,而最后,由于随手一扔,导致充电线再次脱离接口……反 观女主角,简单地将Lumia1520放在一块无线充电平板上,然后,第二天早上起来就会发现手机妥妥地“满电复活”了。视频的画外音强调:“在你的卧 室,是时候跟烦乱的线缆说No了。通过无线充电器,你能够让Lumia智能手机像孩子睡着一样乖乖地充电。”
  智能终端巨头中,诺基亚在无线充 电技术上的投入最多,堪称“第一个吃螃蟹的人”。2012年发布的Lumia920和Lumia820,就是首批支持这一功能的智能手机。与此同时,诺基 亚还开发出众多无线充电外围设备,像是无线充电托盘、无线充电支架、“小胖仔”Fatboy无线充电枕头,以及JBLPowerUp无线充电音箱……只要 将支持这一功能的手机放在以上任意一款设备上,就能开始自动充电。
  不过,虽然各大巨头跃跃欲试,但无线充电领域至今还没有一个统一的技术标 准。以诺基亚Lumia设备为代表的“Qi”标准,和Powermat主导的电源事业联盟(PMA)标准之间,虽然都是一样采用电磁感技术,产品彼此间却 无法兼容。比如在星巴克,基于PMA标准的Powermat无法为支持Qi标准的各种设备、像是Nexus平板、Lumia手机等无线充电。虽然由于门槛 低、通用性强,Qi成为各家手机及移动设备厂商最喜爱的标准,产业中支持Qi的企业达到了200多家,而PMA只有72家。但是,不兼容就是不兼容,对普 通用户来说,一点办法也没有。
  除了最流行的电磁感应,跃跃欲试的无线充电技术和标准还有不少,比如以磁共振技术生产的无线充电装置。这类设备 主要依赖电磁共振耦合原理,在每个线圈周围形成一个能够传输电力的磁场,不需要对线圈进行精确排列。它的最大优势,是可以隔着一段较小的距离实现无线充 电,不需要让设备与充电器直接接触。因此你可以把充电板镶嵌在桌子底下,而不是放在桌面上。磁共振技术的另一个优点,是可以同时支持一台以上设备充电。为此,相关厂商在此技术上成立了A4WP标准联盟。去年,Intel加入了A4WP的无线充电联盟,成为了该联盟一个重要成员。
  此外,还有一种iNPOFi技术。其产品采用智能电传输无线充电技术,具备无辐射、高电能转化效率、热效应微弱等特性。值得一提的是,该技术由中国企业 自主研发。采用该技术的充电设备包含电源发射装置和电源接收装置两部分,发射装置大小、薄厚与普通手机相当,接收装置嵌入手机保护套中,将手机套上保护 套,平放在发射装置上就可以开始充电。充电过程中,手机不需要插上任何连接线。相关检测显示,充电过程中电磁辐射为零,电能效率转换达94.7%,接近有 线充电。iNPOFi充电设备支持低电压供电,兼容普通USB供电。同时可实现低温充电,有效保障设备及电池的使用安全及寿命。
  规模化应用尚待时日
  “看起来很美”,这用来形容当前的无线充电技术颇为合适。
  虽然无线充电的概念非常火热,但事实上,无线充电技术的发展仍然面临诸多阻碍,标准不统一就是一大“硬伤”。在目前的市场上,有包括PMA、A4WP以 及Qi在内的三大标准,代表不同的厂商阵营和利益集团。虽然很多厂商都已经推出了基于各自标准的产品和应用,但是这些标准之间却不具备互通性。对于消费者 而言,要想“一款产品走天下”的愿望还是无法实现。
  就拿星巴克推出的无线充电服务来说,其基于PMA标准,如果是不支持PMA标准的终端,想在星巴克使用无线充电服务,那就必须配备相应的适配器,这对于用户而言,无疑增加了成本并提升了操作的难度。
  更多的企业是“脚踩两条船”,比如高通不止是A4WP标准的建立者,它也是Qi标准的和PMA标准的支持者;三星的情况也基本一样,而Intel虽然没有正式宣布要加入其他两个标准,但用脚趾想,也知道它绝不会将自己捆死在A4WP标准上。
  不仅在智能终端无线充电领域,在电动汽车无线充电领域,标准的统一也是一大难题。很长一段时间内,业界对于电动汽车无线电力传输频率都有争议,这在一定 程度上影响了技术发展的脚步。不过,近期业界就此达成了一致,决定采用85kHz频率。2013年11月,推进“SAEJ2954”标准制定的美国汽车工 程师协会(SAE)宣布采用85kHz,随后日本企业也将85kHz列为第一候选。
  未来究竟是哪个标准会一统天下,还是几大标准分足鼎立,我 们不得而知,不过为消费者带来更简单、更便利的应用却是业界追求的永恒目标。不久前,芯片厂商博通就发布了一款名为BCM59350的无线充电芯片,这款 芯片声称可以兼容现有所有的无线充电标准。无论用户无论使用哪种无线充电技术设备,在该芯片的支持下都可以自由充电。
  当然,无线充电技术的普 及在破解标准难题之后,仍将面临一系列的挑战。如何让无线充电产品的成本持续降低,适应大规模普及的需要?如何在公共场所大规模铺设无线充电设备,让消费 者真的可以随时随地实现充电?这些都是待解之题。不过,也有业内人士指出,进入无线充电领域的厂商越多,成本越快向下走,目前正是低成本潜伏期。为了抢占 这一市场,国内外厂商必然争相推出低成本方案以满足客户需求。
客观而言,相对于传统的有线充电方式,无线充电技术确实能够带来诸多便利,打破时间和空间上的约束。我们有理由相信,随着无线充电技术的发展以及相关产品的进一步成熟,无线充电技术将会拥有一个美好的应用前景。

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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