Download Electrostatic motors; their history, types, and principles by Oleg Jefimenko, Thomas Valone, David K. Walker PDF

By Oleg Jefimenko, Thomas Valone, David K. Walker

The main authoritative and entire e-book near to utilizing excessive voltage electrical cost to strength a motor. The booklet indicates the kind of electrostatic motor that used to be first invented by way of Ben Franklin in 1748. It additionally reports and illustrates electrical pendulum cars, electrical wind automobiles, Franklin's spark automobiles, capacitor automobiles, inductance vehicles, corona automobiles, liquid immersed automobiles, electret vehicles and extra. The final bankruptcy exhibits how the electrostatic motor will be designed to be powered through atmospheric electrical energy, which Professor Jefimenko experimented with on the college of West Virginia. the writer is particularly meticulous to provide dates and references for the historic use of quite distinctive electrostatic automobiles. Dr. Jefimenko's articles from Popular Science journal are reprinted within the Appendix in case you are looking to construct their very own electrostatic motor. He additionally studies the atmospheric strength for producing strength, stating it's within the gigawatt variety. The e-book additionally comprises his evaluate article at the earth's electrical box as a normal resource of electrostatic power.

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Extra info for Electrostatic motors; their history, types, and principles of operation

Example text

Weiler described four different motors utilizing rotating fields. One of his motors was similar to Arno's motor. The operation of this motor (and that of Arno's motor) can be explained with the aid of Fig. 42, representing the top view of the motor. When segment A of the stator is positive, and segment B is negative, the electric field of the stator induces in the dielectric rotor (assumed to be at rest) polarization charges as shown in the figure. After the commutator has completed 1/4 revolution, segment C is positive and segment D is negative.

The motor was powered by electricity stored in the disk itself, which, due to the two layers of gold, constituted a capacitor capable of storing an appreciable quantity of charge (to charge the rotor, the two layers of gold were temporarily connected to an electrostatic friction generator). The motor operated on the same principle as Franklin's first motor, except that now the thimbles were stationary and received positive or negative charges from the passing spheres, rather than the other way around.

Since a corona discharge in air at atmospheric pressure requires a minimum voltage of about 3000 volts, ordinary corona motors can operate only from sources capable of supplying a voltage of this ma¡snitude. Such voltages are, of course, easily attainable at the present time, and since the corona motors are very simple and efficient devices, they have been further developed and studied in recent years. We shall return to them in the last chapter of this book. REFERENCES FIGURE 35 Me Vay's first motor was later modified for charging by combs, rather than by brushes.

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