**High-Temperature Magnetic Data: The Key to Advanced Magnetic Bearings**
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High-temperature magnetic data plays a crucial role in the development of next-generation weapons and equipment. It is essential for advancing core technologies in new power systems, including high-energy integrated power supplies, built-in starter/generator sets for main propulsion, and non-contact magnetic bearings.
Currently, the operating temperature of integrated power supplies is limited to around 300°C. However, the second generation of electric space shuttles (MEAII) planned for 2005 aims to operate at temperatures between 500°C and 600°C. Researchers at the University of Texas Austin's Electromechanical Center (UT-CEM) are developing a flywheel communication generator for pulse power applications in the U.S. Department of Defense’s new hybrid-electric combat vehicles. This generator also supports propulsion and full active electromagnetic suspension systems.
Induction traction motor power supplies can store up to 25 MJ at 20,000 rpm. For intermittent operation of weapon systems, peak power requirements reach 5 MW, with continuous power up to 350 kW. High-speed starters must operate at temperatures above 400°C, with materials capable of withstanding up to 825 MPa of stress.
Due to core and air pump losses, the actual rotor temperature is influenced by thermal effects from the spinning rotor. High stress and elevated temperatures can cause deformation and creep in electromechanical components. Therefore, high-speed starter/generator units must be integrated into the main propulsion engine, designed to function under high-stress, high-temperature, and air-cooled conditions.
Magnetic bearings are essential in achieving smooth and collision-free operation. The U.S. military, NASA, and aerospace industries are highly interested in high-temperature magnetic bearings, particularly for future gas turbine starters, integrated power supplies, and large main propulsion generators. These bearings rely on magnetic forces to eliminate friction and wear.
Permanent magnet bearings offer advantages over soft magnetic materials, but their operating temperatures are currently lower than those of soft magnetic counterparts. Radial bearings in large turbine fans must operate at temperatures exceeding 550°C, while energy storage systems may function at extreme temperatures worldwide.
In addition, flying control electromechanical systems and secondary power supplies require high-temperature magnetic bearings to enhance flight system performance. The U.S. military is actively developing high-energy weapons, aiming to replace traditional ordnance by 2030. Whether deployed on land, at sea, or in the air, these weapons demand high power and lightweight solutions.
Advancements in power attack, energy storage, self-starting capabilities, high-speed magnetic bearing operations, and air-cooled electromechanical components are key challenges. Higher operating temperatures in magnetic data significantly contribute to improving these systems.
As military and civilian electromechanical demands continue to evolve, there is a growing need for more advanced power systems. Developing power generation, distribution, and management systems that operate at higher speeds and temperatures represents a critical trend. The new series of high-temperature magnetic data is central to achieving these goals.
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This article is sourced from China Bearing Network.
Please visit http://www.chinabearing.net for more information.
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