UNIT 8: Từ thông độ thấm mạch

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Nội dung Text: UNIT 8: Từ thông độ thấm mạch

MAGNETIC FLUX – PERMEABILITY – MAGNETIC CIRCUIT INDUCED ELECTROMOTIVE FORCE – SELF AND MUTUAL INDUCTANCES LOGO www.themegallery.com
Magnetic Field sources www.themegallery.c LOGO
Magnetic Field sources www.themegallery.c LOGO
Magnetic field of a bar magnet and a solenoid www.themegallery.c LOGO
Solenoid www.themegallery.c LOGO
Solenoid www.themegallery.c LOGO
Magnetic flux  A measure of quantity of magnetism, taking account of the strength and the extent of a magnetic field  Flux per unit area = flux density B=Ф/A B=Hxµ µ = permeability www.themegallery.c LOGO
Magnetization www.themegallery.c LOGO
www.themegallery.c LOGO
Magnetization curve Flux density B Residual flux density Field strength H www.themegallery.c LOGO
Magnetic circuit  Magnetic field of a toroid  Ф = F/ S  Ф = Flux  F = Magnetic force  S = magnetic reluctance www.themegallery.c LOGO
Force created by a magnetic field on a current carrying conductor F = B*I*L www.themegallery.c LOGO
Electromagnetic inductance Electromotive force E = - ΔФ/Δt www.themegallery.c LOGO
Mutual inductance www.themegallery.c LOGO
Mutual inductance www.themegallery.c LOGO
Self inductance www.themegallery.c LOGO
Self inductance Where: VL = the induced voltage in volts N = the number of turns in the coil dø/dt = the rate of change in magnetic flux in webers per second www.themegallery.c LOGO
Magnetic recording / reading www.themegallery.c LOGO
Variations in Hysteresis Curves www.themegallery.c LOGO