Kojimag(Foundation)

Part1. Foundation for the magnetic field equation

§1．The magnetic field including magnetized material

§1-1)The case only current existing

§1-2)Magnetic field by magnetic dipole

§1-3)The case including magnetized material(vector potential equation)

§1-4)The case including magnetized material(magnetic field equation)

§2．Idea of charge model

§2-1)Demagnetization curve of various magnet and parameter of magnet property

§2-2)Consideration of the meaning of carge model

Part 2. Magnetic field made by static magnetic charged surface

§3．Magnetic field made by square magnetic charged surface

§3-1)Equation of magnetic field

§3-2)Carry out integral

§3-3)Consideration of the singlar point of solution

§4．Magnetic field made by tryangle magnetic charged surface

§4-1)Equation of magnetic field

§4-2)Carry out integral

§5．Magnetic field made by circle magnetic charged surface

§5-1)Equation of magnetic field

§5-2)Carry out integral

§6．Magnetic field made by sector magnetic charged surface

§6-1)Equation of magnetic field

§6-2)Carry out integral

§7．Magnetic field made by arc magnetic charged surface

§7-1)Equation of magnetic field

§7-2)Carry out integral

Part 3. Magnetic field made by steady currents

§8．Magnetic field made by current in straight square wire

§8-1)Equation of magnetic field

§8-2)Carry out integral

§9．Magnetic field made by current in sector square wire

§9-1)Equation of magnetic field

§9-2)Carry out integral

§10．Magnetic field made by current in straight cylindrical wire

§10-1)Equation of magnetic field

§10-2)Carry out integral

§11．Magnetic field made by current in sector cylindrical wire

§11-1)Equation of magnetic field

§11-2)Carry out integral

Part 4. Coordinate system and it's transformation

§12．World coordinate system and intrinsic coordinate system

§12-1)Rotation of the coordinate system

§12-2)Description by matrix

§12-3)Translation of axis

§12-4)Rotation and translation of the coordinate syatem(world and intrinsic coordinate system)

§12-5)Coordinate transformation of the vector field

§13．Rotation and transformation of three dimensional object

Part 5. Definition of intrinsic coordinate system of various magnet, coil and caluculation surface

§14．Magnetic field made by general prism magnet

§14-1)Definition of general prism magnet

§14-2)Contribution to magnetic field from each magnetic chaeged surface

§14-3)Definition of general prism magnet(Left hand coordinte system)

§14-4)Contribution to magnetic field from each magnetic chaeged surface(Left hand coordinte system)

§14-5)Summary

Part 6. Force acting on the magnet

§17．Caluculation of a force acting on the magnet

§17-1)Coulomb's law regarding magnetic carge

§17-2)Caluculation acting on the magnet

§17-3)Caluculation acting on the general magnet

Part 7. Demagnetization of the magnet by heating

§18．Temperature dependence of the demagnetization curve

§18-1)The case of Neodimium magnet

§18-2)Irreversible demagnetization ratio caluculation by heating

§18-3)The case when temperature is T℃

§19．Permeance coefficient

§19-1)Relation between magnetization I, magnetic field B and H in the magnetized material

§19-2)Permeance coefficient

§20．Demagnetization by heating of general prism magnet

§20-1)Modeling of demagnetization by heating for general magnet

§20-2)Calucultion of opposite magnetic field in each cell

§20-3)Evaluation of demagnetiztion ratio in each cell