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KF5JRV > TECH 24.10.16 05:25l 19 Lines 942 Bytes #999 (0) @ WW
BID : 4055_KF5JRV
Read: GUEST
Subj: DC Motor
Path: IW8PGT<CX2SA<N0KFQ<AE5ME<KF5JRV
Sent: 161023/1315Z 4055@KF5JRV.#NWAR.AR.USA.NA BPQK6.0.13
DC Motor
The history of the electric motor begins with Hans Christian Oersted,
who discovered in 1820, that electricity produced a magnetic field.
Faraday followed up this in 1821, by devising the principle of the
electric motor of his own design. Some of those worth mentioning are
Jacobi in 1834, Elias in 1842, Froment in 1844 and Pacinotti in 1860.
Pacinotti used a ring wound armature which was used in 1860 and was
an outstanding advance on any previous attempts. Most of these motors
were in the experimental stage but it was not until 1871, that Zenobe
Theophile Gramme introduced his motor, which was really a development
of Pacinotti's machine. This motor was said to be the first electric
motor of commercial significance. During this period the scientists
concentrated on the "motor", but meanwhile, experiments with machines
producing electricity dynamically were under way.
73 Scott KF5JRV
KF5JRV.#NWAR.AR.USA.NA
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