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The Inventions, Researches and Writings of Nikola Tesla
Nikola Tesla; ed. Thomas Commerford Martin · 1894
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English
CONTENTS.
CHAPTER VII.
REGULATOR FOR ROTARY CURRENT MOTORS. . . . . . . . . . . 45
original: "Rotary Current." This is an early term for polyphase alternating currents that create a rotating magnetic field.
CHAPTER VIII.
SINGLE CIRCUIT, SELF-STARTING SYNCHRONIZING MOTORS. . . 50
A synchronizing (or synchronous) motor is an AC motor where the shaft rotation is synced with the frequency of the supply current.
CHAPTER IX.
CHANGE FROM DOUBLE CURRENT TO SINGLE CURRENT
MOTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
original: "Double Current." This refers to two-phase alternating current systems.
CHAPTER X.
MOTOR WITH "CURRENT LAG" ARTIFICIALLY SECURED. . . . 58
"Current lag" (or phase lag) occurs when the electrical current peaks slightly after the voltage; Tesla used this delay to help motors start and run on a single circuit.
CHAPTER XI.
ANOTHER METHOD OF TRANSFORMATION FROM A TORQUE TO
A SYNCHRONIZING MOTOR. . . . . . . . . . . . . . . . . . . . . . . . . . 62
A torque motor is designed to provide high turning force even at low speeds or when stalled, whereas a synchronizing motor runs at a constant speed locked to the power frequency.
CHAPTER XII.
"MAGNETIC LAG" MOTOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
CHAPTER XIII.
METHOD OF OBTAINING DIFFERENCE OF PHASE BY MAGNETIC SHIELDING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Magnetic shielding involves using specific materials to block or redirect magnetic lines of force to influence how the motor operates.
CHAPTER XIV.
TYPE OF TESLA SINGLE-PHASE MOTOR . . . . . . . . . . . . . . . . 76
CHAPTER XV.
MOTORS WITH CIRCUITS OF DIFFERENT RESISTANCE. . . . . . 79
CHAPTER XVI.
MOTOR WITH EQUAL MAGNETIC ENERGIES IN FIELD AND
ARMATURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
The "field" is the stationary part of the motor that creates magnetism, and the "armature" is the rotating part (rotor) that interacts with that field to create motion.
CHAPTER XVII.
MOTORS WITH COINCIDING MAXIMA OF MAGNETIC EFFECT
IN ARMATURE AND FIELD. . . . . . . . . . . . . . . . . . . . . . . . . . . 83
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