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Dictionary of Electrical Engineering

Commonly used terms in the Electrical industry.

hertz
a unit of frequency.
terahertz (THz)
a frequency unit, 1012 hertz.
volts/hertz control
a method of speed control of induction machines, used below rated speed. When the volts/hertz ratio is kept constant, the current through the stator windings remains almost the same, except for very low speeds; hence, the available torque remains constant, but the speed changes due to change in frequency.