permanent-magnetic rotor

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• magnetic pick-up assembly — A pulse generator consisting of a stator with a permanent magnet and a rotor, which induces an AC voltage in the inductive winding by the periodic change of the air gap between stator and rotor. Magnetic pick ups attached to the distributor for… …   Dictionary of automotive terms

• Rotating magnetic field — A rotating magnetic field is a magnetic field which changes direction at (ideally) a constant angular rate. This is a key principle in the operation of the alternating current motor. In 1882, Nikola Tesla identified the concept of the rotating… …   Wikipedia

• Excitation (magnetic) — An electric generator or electric motor that uses field coils rather than permanent magnets will require a current flow to be present in the field coils for the device to be able to work. If the field coils are not powered, the rotor in a… …   Wikipedia

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• History of perpetual motion machines — The history of perpetual motion machines dates back to the Middle Ages. For millennia, it was not clear whether perpetual motion devices were possible or not, but the development of modern thermodynamics has indicated that they are impossible.… …   Wikipedia

• spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …   Universalium

• magneto — /mag nee toh/, n., pl. magnetos. Elect. a small electric generator with an armature that rotates in a magnetic field provided by permanent magnets, as a generator supplying ignition current for certain types of internal combustion engines or a… …   Universalium