Alternate Current Machines example essay topic

Tesla on the D.C. motor In a paper presented before the American Institute of Electrical Engineers in 1888, Tesla criticized the illogical construction of the D.C. motor. "In our dynamo machines, it is well known, we generate alternate currents which we direct by means of a commutator, a complicated device and, it may be justly said, the source of most of the troubles experienced in the operation of the machines. Now, the currents, so directed cannot be utilized in the motor, but must - again by means of a similar unreliable device - be reconverted into their original state of alternate currents. The function of the commutator is entirely external, and in no way does it affect the internal workings of the machines. In reality, therefore, all machines are alternate current machines, the currents appearing as continuous only in the external circuit during the transfer from generator to motor. In view simply of this fact, alternate currents would commend themselves as a more direct application of electrical energy, and the employment of continuous currents would only be justified if we had dynamos which would primarily generate, and motors which would be directly actuated by, such currents".

Adopted from T.C. Martin, "The Inventions, Researches and Writings of Nikola Tesla", New Work: Electrical Engineer, 1894, pp. 9-11 Tesla on War and Peace "War cannot be avoided until the physical cause for its recurrence is removed and this, in the last analysis, is the vast extent of the planet on which we live. Only through annihilation of distance in every respect, as the conveyance of intelligence, transport of passengers and supplies and transmission of energy will conditions be brought about some day, insuring permanency of friendly relations. What we now want is closer contact and better understanding between individuals and communities all over the earth, and the elimination of ego is and pride which is always prone to plunge the world into primeval barbarism and strife... Peace can only come as a natural consequence of universal enlightenment...

". Nikola Tesla, "My Inventions: the autobiography of Nikola Tesla", Hart Bros., 1982. Originally appeared in the Electrical experimenter magazine in 1919. Tesla on George Westinghouse "George Westinghouse was, in my opinion, the only man on this globe who could take my alternating-current system under the circumstances then existing and win the battle against prejudice and money power.

He was a pioneer of imposing stature, one of the world's true nobleman of whom America may well be proud and to whom humanity owes an immense debt of gratitude". Speech, Institute of Immigrant Welfare, Hotel Baltimore, New York, May 12, 1938, read in absentia Tesla on the Future "We are confronted with portentous problems which can not be solved just by providing for our material existence, however abundantly. On the contrary, progress in this direction is fraught with hazards and perils not less menacing than those born from want and suffering. If we were to release the energy of the atoms or discover some other way of developing cheap and unlimited power at any point of the globe this accomplishment, instead of being a blessing, might bring disaster to mankind... The greatest good will come from the technical improvements tending to unification and harmony, and my wireless transmitter is preeminently such. By its means the human voice and likeness will be reproduced everywhere and factories driven thousands of miles from waterfalls furnishing the power; aerial machines will be propelled around the earth without a stop and the sun's energy controlled to create lakes and rivers for motive purposes and transformation of arid deserts into fertile land... ".