Date post: | 31-Dec-2015 |
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Principles of Electromechanics
Electricity Motion
Electricity Motion: Motor
Motion Electricity: Generator
Magnetic Field & Faraday’s Law
Magnetic Field
1. Generation of magnetic field• Permanent Magnet:
• Electric Current: using right hand rule to determine the field direction
• Straight current
• Current coil
N
S
Current Motion: Current in magnetic field
• Magnetic field will exert a force on a current
• Magnetic field will exert a force on a moving charge
(N/m) BIL
F
× × × × × × × × × × × ×× × × × × ×× × × × × ×× × × × × ×× × × × × ×× × × × × ×
I
F
× × × × × × × × × × × ×× × × × × ×× × × × × ×× × × × × ×× × × × × ×× × × × × ×
-qV
FrqVB
qVBF
BVqF
B
B
sin
Circular Motion: Plane B
× × × × × × × × × × × ×× × × × × ×× × × × × ×× × × × × ×× × × × × ×× × × × × ×
-qV
Fr
Circular path: V||=0 Helical path: V||0