Nikola Tesla - Free-Energy Devices

CHAPTER XIX.ANOTHER TYPE OF TESLA INDUCTION MOTOR.IT WILL have been gathered byall who are interested in theadvance of the electrical arts, and who follow carefully, step bythat Mr. Tesla ha been foremost tostep, the work of pioneers,utilize inductive effects in permanently closed circuits, in theoperation of alternating motors. In this chapter one simple typeof such a motor is described and illustrated, which will serve asan exemplification of the principle.Let it be assumed that an ordinary alternating current generatoris connected up in a circuit of practically no self-induction,such, for example, as a circuit containing incandescent lampsonly. On the operation of the machine, alternating currents willbe developed in the circuit, and the phases of these currents willtheoretically coincide with the phases of the impressed electromotiveforce. Such currents may be regarded and designated asthe "unretarded currents."It will be understood, of course, that in practice there is alwaysmore or less self-induction in the circuit, which modifies toa corresponding extent these conditions ;but for conveniencethismay be disregarded in the consideration of the principle ofoperation, since the same laws apply. Assume next that a pathof currents be formed across any two points of the above circuit,consisting, for example, of the primary of an induction device.The phases of the currents passing through the primary,owing to the self-induction of the same, will not coincide withthe phases of the impressed electromotive force, but will lagbehind,such lag being directly proportional to the self-inductionand inversely proportional to the resistance of the said coil.The insertion of this coil will also cause a lagging or retardationof the currents traversing and delivered by the generator behindthe impressed electromotive force, such lag being the mean orresultant of the lag of the current through the primary alone andof the " unretarded current " in the entire working circuit. Next