CE verification of complianceISO 9001-2000 Certificate Taiwan Excellence Award in 2008 Bronze Medal Award in INST 2008 Gold Medal Award in INST 2007Bronze Medal Award in INST 2007Golden Quality Award for Customer Satisfaction Golden Role Model for Outstanding EntrepreneursGolden Root Award of 2006 Accomplished Research Award of 2005
About Risun Expanse CorporationFounded in 1999, [ Risun Expanse Corporation ] specializes in the research and development, manufacturing, and marketing of DC brushless micro-motors and micro-coolers. Risun has outstanding R&D team and the most state-of -the-art production in teams of a complete operation process, strict quality control, punctual delivery, as well as competitive prices.As a specialist in the manufacturing of DC brushless micro-motor and micro-vibrators. Risun strives to take her expertise into the next level, by developing new items, offering high-quality products, and comprehensive service for customers worldwide.(more about Risun)
Extra mini and slim, extremely suitable for portableElectronic devicesHigh efficiency and low powerHigh airflow and low noiseSelf-lubricative bearing used for a long service lifeApplicationOur atomic cooler is applicable to cooling of the precise electronic commodities, such as Video Processing Chipset for NB, Memory Module for Desktops and NB, and high-end smart phone/PDA,Digital Video Camcorder,Portable Mini Projector and so on.Test Reports   Risun Expanse Corp.'s DC brushless micro vibration motor, measuring only 1 centimeter in diameter and 0.4 centimeter in height, is the industry's first such product to win U.S. patent and enter into volume production.Now, it has also been protected by patents in Germany, Japan, Singapore, South Korea, Taiwan and mainland China. The patents underscore the company's unique magnet off-centering vibration technology, which is much better than that of motor manufacturers in South Korea and Japan. The patents have kept the company's rivals limiting efforts to rotor technology, which is inefficient. Traditional vibration motors have shorter life span than brushless types because of their contact-type brushes, which tend to spark and generate some hazardous emissions like noise. Also, traditional types are usually massive blocks thanks to their huge parts. Compared with brush type, Risun's DC brushless motor is much safer and durable, less noisy, as well as spark free mostly thanks to its electromagnetic-induction mechanism, which does not cause any problem associated with brush contact. So far, the company's proprietary motor has been built into various personal accessories such as shoes, bracelets, eyeshades, and makeup tools as a massager. Also, it has been installed in wrist watches to detect body temperature and blood circulation. Risun develops its micro-vibration motor technology by making most of mechanics, electromechanics and electronics sciences. The product is complaint with RoHS directive and has been provided by CE-certified laboratories as qualified device for information-technology and medical applications.

Model NumberRFA1804DProduct NameAtomic CoolerBearingAxially-grooved BearingRated Voltage (VDC)3.35Operating Voltage(VDC)2.8~3.64.5~5.5Rated Current (mA)