Define permanent magnet. permanent magnet synonyms, permanent magnet pronunciation, permanent magnet translation, English dictionary definition of permanent magnet. n. A piece of magnetic material that retains its magnetism after it is removed from a mag
1.1 Permanent magnet The permanent magnet [38], shown in Fig. 3a, was flown on the AMS engineering flight in 1998 and was described in detail in the AMS-01 Physics Report [1]. It is made of 64 high-grade Nd-Fe-B sectors assembled in a cylindrical shell 800 mm long with an inner ...
Q. Zhu, "Permanent magnet demagnetization physics of a variable flux memory motor," IEEE Trans. on Magn., vol. 45, no.10, pp. 4736-4739, Oct. 2009.Liu Hengchuan,Lin Heyun,Fang Shuhuaet al.Permanent magnet demagnetization physics of a variable flux memory motor. IEEE Transactions on ...
to exhibit magnetism. for example, permanent magnets are used as compass needles. example of permanent magnets an everyday example of a permanent magnet is a refrigerator magnet. the image below shows the magnetic field produced by a bar magnet. the magnetic field is the sphere of influence of...
The high-precision simulation of tile-shaped and rectangular permanent magnet magnetic fields of permanent magnet motors based on physical information neural network is studied, and the error is within 5%. We consider the simulation of magnetic field in two coordinate systems, and realize the joint ...
Going back as far as 1931, it is shown by the examples MnAl, Fe-Nd, Fe-Nd-B, and Fe(-Ti)-Sm how the history of permanent magnet materials might have evolved differently if hints had been heeded that were discernible long before a particular magnet development actually began. The author...
Abstract High-speed permanent magnet machine (HSPMM) is attracting more attention due to its advantages of high power density and efficiency, small size, light weight and fast dynamic response. The design of HSPMM is a nonlinear, multi-physics coupled process that makes it difficult to build an...
In order to solve the heat dissipation problem of high-speed permanent magnet (PM) motor with magnetic bearings (MB), a stator jacket with water cooling and forced air convection cooling was designed. A multi-physics thermal analysis and design method based on coupling finite element method (FEM...
In order to clarify the correlations between magnetic flux and levitation force of the high-temperature superconducting (HTS) bulk, we measured the magnetic flux density on bottom and top surfaces of a bulk superconductor while vertically moving above a permanent magnet guideway (PMG). The levitatio...
The definition of weighted average differences P of electronegativities and Q of atomic pseudoradii between rare earth and other elements was introduced in respect of rare earth permanent magnet materials. The P,Q values of the materials with good magnetic properties were calculated. These rare eart...