Magnetic Engines Could Help Satellites Stay in Orbit Longer Resource from: Engadget 27 Jul,2016
Share to：0 Researchers have developed a new method for getting satellites to orbit the Earth and it involves magnetic levitation.
Current satellites often rely on a type of flywheel called a reaction wheel. These wheels let satellites store angular momentum by spinning at a constant speed, and then use it by stopping the wheel suddenly, which translates into orbit adjustments. A failed reaction wheel has been the cause of more than one malfunction, the Hubble Telescope has had to be serviced twice to repair malfunctioning wheels. Similarly, when two out of four of the Kepler telescope's reaction wheels failed in 2013, it was widely feared that it would become space junk.
Reactions wheels rely on ball bearings, which take up space, require attention and lubrication, and have not proven to be 100 percent precise. The researchers at Celeroton, a company specializing in high speed motors, have used magnets to create a "floating motor" that does not wear out.
There are several potential advantages to this system. First of all, it's faster. A Celeroton motor spins at 150,000 RPMs per second, compared to 6,000 with ball bearings. It's also less sensitive. Magnetic support, says Arda Tüysüz-a Celeroton researcher who was an author of the paper presenting the findings-"also allows us to avoid the vibrations" that can cause ball bearings to become unhinged. As the Celeroton paper notes, by using magnetic bearings instead of ball bearings, "a smoothtorque can be achieved also at speed zero crossings."
The motor is currently a prototype, and the focus is on smaller satellites, weighing up to a few hundred pounds at the max. But still, Engadget is reporting that multiple space-faring agencies and companies, including the European Space Agency, are giving the new engine a hard look. Maybe they should also give greaseless bearings a try.(Engadget)【CBCC News Statement】 1.The news above mentioned with detailed source are from internet.We are trying our best to assure they are accurate ,timely and safe so as to let bearing users and sellers read more related info.However, it doesn't mean we agree with any point of view referred in above contents and we are not responsible for the authenticity. If you want to publish the news,please note the source and you will be legally responsible for the news published. 2.All news edited and translated by us are specially noted the source"CBCC". 3.For investors,please be cautious for all news.We don't bear any damage brought by late and inaccurate news. 4.If the news we published involves copyright of yours,just let us know.