What is the difference between a generator and a motor?
How is power (current?) extracted from a generator?
and also, are induction motors -> generators?
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- 15-06-2005 00:13
- 15-06-2005 00:27
A motor works on the principal that a wire that has a current flowing through it, in a magnetic field will experience a force (F=BIL and the left hand rule).
A generator, eg a turbine, will work by faraday's law. The induced emf is the rate of change of flux linkage (induced emf=(BAN)/t. A simple turbine is a coil connected to something turning it and the turbine is in a magnetic field. When a simple turbine turns the 'A', cross sectional area in the field will change. This causes a current to flow. Since there is now a current in the wire and it is in a magnetic field, a force opposing the motion of the coil exists. This is lenz's law.