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 [FIGURE 1-2 OMITTED]When the magnetic bearings are energized, the motor and impellers, which are keyed directly to the magnetic shaft, levitate. Permanent-magnetic bearings do the primary work, while digitally controlled electromagnets provide the fine positioning. Four positioning signals per bearing hold the levitated assembly to a tolerance of 0.00002 in. As the levitated assembly moves from the center point, the electromagnets'' intensity outsidestonefirepits is adjusted to correct the position. These adjustments occur 6 million times a minute. The software has been designed to automatically compensate for any out-of-balance condition in the levitated assembly.SHUTDOWNS AND POWER FAILURESWhen the compressor is not running, the shaft assembly rests on graphite-lined, radially located touchdown bearings. The magnetic bearings normally position the rotor in the proper location, preventing contact between the rotor and other metallic surfaces. If the magnetic bearings fail, the touchdown outsidestonefirepits bearings (also known as backup bearings) are used to prevent a compressor failure. The MorElectric system began lab tests in 2002, and is currently testing in on-highway truck applications. Commercial production is expected in early 2005. Caterpillar expects the system to be used in a variety of trucks as well as off-highway, marine and military applications as well. Ort said Caterpillar is looking for partners for market exposure and field validation testing opportunities beginning this September.The development of the system grew, in part, out of a Dept. of Energy (DOE) program called "Parasitic Energy Loss Reduction and Enabling Technologies for Class 7/8 Trucks." This 42 month, $4.4 million research program started in May 2000 and brought together Cat Electronics, Kenworth outsidestonefirepits Truck, Engineered Machined Products, a major supplier of water pumps to the heavy-duty diesel business, and Emerson Electric. Find outdoor firepits on sale right here. We offer discount outdoor firepits for a fraction of the cost of retail online outdoor firepits retailers. Buy outdoor firepit here and save.
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