Although most people are not familiar with wireless charging technology, the wireless charging function has received widespread attention since the release of the Nokia Lumia 920. As one of the main selling points, wireless charging makes the Lumia 920 differentiate from the current mainstream mobile phone products with distinct personality. But in fact, Nokia is not the first to use wireless charging technology on mobile phones. A year ago, Philips launched the Qi wireless charging standard mobile phone, but it did not cause consumers' attention.
In fact, the current wireless charging technology is not mature, not only the technology is slow, but the standards are not yet unified. There are currently three mainstream wireless charging standards: Power Matters Alliance (PMA) standard, Qi standard, and Alliance for Wireless Power (A4WP) standard. Below we will briefly introduce these three standards.
1. Power Matters Alliance Standard
The Power Matters Alliance standard was initiated by Duracell Powermat, which is a joint venture between P&G and wireless charging technology company Powermat, with a comprehensive strength. In addition, Powermat is a support member of the Alliance for Wireless Power (A4WP) standard.
At present, AT&T, Google and Starbucks have joined the PMA Alliance (short for Power Matters Alliance). The PMA Alliance is committed to creating wireless power standards for mobile and electronic devices that comply with IEEE Association standards and is a leader in wireless charging.
At present, Duracell Powermat has introduced a WiCC charging card using the Power Matters Alliance standard. The WiCC is larger than the SD card, and is internally embedded with components such as coils and electrodes for electromagnetic induction type non-contact charging. The thickness of the card is thin and can be used by inserting it into the existing smart phone battery. The terminal easily supports contactless charging.
WiCC charging card
In addition, Starbucks plans to conduct a Duracell Powermat wireless charging pilot at 17 stores in the Boston area, which will provide strong support for PMA's foothold in the United States. Starbucks chief digital officer Adam Brotman said: "Starbucks will place wireless charging devices on some of the desktops to see how customers react." If customers don't have a charging case that matches the iPhone or Galaxy, Starbucks will give a small free gift during the pilot period. And the counter also has some shells for lending.
2. Qi standard
Qi is the world's first standardization organization to promote wireless charging technology - Wireless Power Consoration (WPC) "Wireless Charging" standard, with two features of convenience and versatility. First of all, different brands of products, as long as there is a Qi logo, you can use Qi wireless charger to charge. Secondly, it overcomes the technical bottleneck of wireless charging "universality". In the near future, mobile phones, cameras, computers and other products can be charged with Qi wireless charger, providing a possibility for large-scale application of wireless charging.
At present, the mainstream wireless charging technology in the market mainly adopts three methods, namely electromagnetic induction, radio wave, and resonance, and Qi adopts the most mainstream electromagnetic induction technology. In terms of technology applications, Chinese companies have stood at the forefront of the wireless charging industry. It is reported that Qi's application products in China are mainly mobile phones. This is the first stage, and will be developed into digital products of different categories or higher power in the future. So far, the number of alliance members has increased to 74, including Philips, HTC, Nokia, Samsung, Sony Ericsson, Best Buy and other well-known companies are already members of the alliance.
Busway Temperature Monitoring System
The busway temperature monitoring system is composed of monitoring host and temperature and humidity acquisition module, which is used for the temperature monitoring of low-voltage dense busway. The main monitoring temperatures include: the temperature at the busway connection (the temperature of each phase contact point), the busway housing temperature, and the ambient temperature, and can display, upload, store and fault alarm the data in the monitoring unit.
Busway Temperature Monitoring System,Thermostatic Temperature Control Valve,Temperature Control Box Mod,Bus Bar Temperature Monitoring
Jiangsu Sfere Electric Co., Ltd , https://www.elecnova-global.com