by SatCon Technology Corp., National Aeronautics and Space Administration, National Technical Information Service, distributor in Cambridge, MA, [Washington, DC, Springfield, Va .
Written in English
|Other titles||Magnetic bearings for a high performance optical disk buffer.|
|Statement||by Richard Hockney ... [et al.].|
|Series||NASA contractor report -- NASA CR-190873., SatCon report -- R05-90.|
|Contributions||Hockney, Richard., United States. National Aeronautics and Space Administration.|
|The Physical Object|
Get this from a library! Magnetic bearings for a high-performance optical disk buffer. Volume I, Final report for period May - April [Richard Hockney; United States. National Aeronautics and Space Administration.;]. Get this from a library! Magnetic bearings for a high-performance optical disk buffer. Volume II, Final report for period May - April [United States. National Aeronautics and Space Administration.;]. The use of magnetic bearings is advantageous in the optical disk buffer because of the absence of physical contact between the rotating and stationary members. This frictionless operation leads to extended life and reduced drag. The manufacturing tolerances that are required to fabricate magnetic bearings would also be relaxed from those required for precision ball and gas bearings. Since Author: Timothy Hawkey and Richard Hockney. The operating instructions for the magnetic bearings of a high-performance optical disk buffer are provided. Among the topics that are discussed are the following: front panel layout, turn-on procedure, shut-down procedure, and latch-up protection. Additionally, comprehensive engineering drawings are presented for the design.
Magnetic bearings for a high-performance optical disk buffer, volume 1 By Bruce Johnson, James Downer, Jr. George Anastas, James Goldie, Richard Hockney, Karen Adler, Frederick Flynn, Timothy Hawkey and Vijay Gondhalekar. HAUSPROFI Magnetic Rings Toys, Hand Spinners Fidget Toy - Finger Gyro Toy with Bearing Focus - Stress Relief Reducer Spin - Stress Relief Magnetic Ring Fidget Toy for Adults Children out of 5 stars 1. G. Genta, in Kinetic Energy Storage, Magnetic bearings. Magnetic bearings appear to have many advantages and to be particularly suited for flywheel applications. The absence of contact between solid surfaces is important for two reasons: firstly, there is no need of lubrication, making vacuum operation easier, and, secondly, the drag torque is very low. The disk is dirty B. The optical drive is dirty C. Use a CD drive instead of a DVD drive. D. You have a hardware problem. It receives frames into a port buffer and reads the destination MAC address from the Ethernet frame. Lower capacity compared to magnetic drives, High performance.
Functional principle of an active magnetic bearing. In this magnetic bearing type, the rotational speed is limited due to increasing eddy current losses in the rotor and stator iron, a limited actuator bandwidth and a high reactive power demand. Therefore, magnetic bearings have only been successful up to rotational speeds of about , rpm. While a wide variety of magnetic bearings have been developed, only one type has been widely accepted in the industry so far - Active Magnetic Bearings (AMBs). This is because an active magnetic bearing can exert higher-density forces on surfaces of supported objects than any other type of magnetic bearing. They can also operate in a wide range. A magnetic bearing is a type of bearing that supports a load using magnetic ic bearings support moving parts without physical contact. For instance, they are able to levitate a rotating shaft and permit relative motion with very low friction and no mechanical wear. Magnetic bearings support the highest speeds of any kind of bearing and have no maximum relative speed. R.E. Hanitsch, in Encyclopedia of Materials: Science and Technology, Friction Losses. Depending on the motor power, electric motors will use either rolling or sleeve bearing. For high-speed applications, the friction losses will increase rapidly and then magnetic bearings are a good choice. In the case of large motors, active magnetic bearings are used while for small rotating and.