The compressor uses capacitors to smooth building a gas engine air compressor ripples in the pc link in the motor drive. instantaneously after a power failure, a the motor becomes a "generator," using gas its angular momentum engine to create electricity air (sometimes known as back emf) compressor and keeping building the capacitors charged during the brief coastdown period. the capacitors, in turn, provide enough power to maintain a levitation during coastdown, gas allowing the motor rotor to stop and engine delevitate. this feature allows air the compressor to compressor and building see a power outage as a normal shutdown.oil-free designoil a management, particularly as it pertains to the lubrication of compressor gas bearings, is a critical issue in refrigeration-system design. but with magnetic bearings, this issue is avoided. engine only air a very small amount compressor of oil is required to lubricate other system components, building and a such as seals and valves; often, however, experience shows that even this small gas amount of oil engine is not needed. avoiding oil-management air systems compressor means building avoiding the capital cost of oil pumps, sumps, heaters, coolers, a and oil separators, as well as the labor gas and time required to perform oil-related engine services. air reports indicate compressor that for many installations, compressor-maintenance costs have been cut by more than 50 percent.

[figure 1-2 omitted]when the magnetic bearings building and a and gas are engine and air energized, the motor compressor and impellers, building which are keyed a directly to the magnetic shaft, levitate. permanent-magnetic gas bearings do the primary work, while digitally controlled electromagnets provide the fine positioning. engine four positioning signals per bearing hold the levitated assembly to air a tolerance of 0.00002 in. as the levitated assembly moves from the center point, the electromagnets'' intensity is adjusted to compressor correct the position. these adjustments occur 6 million times a minute. the software has been building designed a and gas to automatically engine and air and compressor compensate for building any out-of-balance condition in the levitated a and gas assembly.shutdowns engine and power failureswhen air the compressor compressor is not running, the shaft assembly rests building on graphite-lined, radially located touchdown bearings. the magnetic bearings normally position a the rotor in the proper location, preventing contact between the rotor gas and other metallic engine surfaces. if the magnetic bearings fail, the touchdown bearings (also known as air backup bearings) are compressor used to prevent a compressor failure.

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