Users Also Read
MCQ's Search Engine
Electrical Engineering
Mechanical Engineering
Civil Engineering
Automobile Engineering
Chemical Engineering
Computer Engineering
Electronics Engineering
Medical Science Engg
All Engineering Dictionary Terms
Definition of "Harmonic Distortion" |
The presence of harmonics that change the AC voltage waveform from a simple sinusoidal to complex waveform. Harmonic distortion can be generated by a load and fed back to the AC utility line, causing power problems to other equipment on the same circuit. / A ratio of 100 times the sum of all the harmonics to the fundamental. In the output signal of a device, distortion caused by the presence of frequencies that are not present in the input signal, caused by nonlinearities within the device. The production of harmonic frequencies at the output of a nonlinear device when a sinusoidal signal is applied to the input. / Harmonic distortion is the alteration of the original shape of something, such as an object, image, sound or waveform. Distortion is usually unwanted, and so engineers strive to eliminate distortion, or minimize it. In some situations, however, distortion may be desirable. / The total harmonic distortion, or THD, of a signal is a measurement of the harmonic distortion present and is defined as the ratio of the sum of the powers of all harmonic components to the power of the fundamental frequency. THD is used to characterize the linearity of audio systems and the power quality of electric power systems. Distortion factor is a closely related term, sometimes used as a synonym. / The dissipation constant of a thermistor, expressed in units of milliwatts per degree Celsius, is defined as the ratio, at a specified ambient temperature, of a change in power dissipation to the resultant change in temperature of the thermistor. / caused by the nonlinear transfer characteristics of a device or circuit. When a sinusoidal signal of a single frequency (the fundamental frequency) is applied at the input of a nonlinear circuit, the output contains frequency components that are integer multiples of the fundamental frequency (harmonics). The resulting distortion is called harmonic distortion. |
Please type any word or choose alphabet below... |
A
B
C
D
E
F
G
H
I
J
K
L
M N O P Q R S T U V W X Y Z 1 2 3 4 5 6 7 8 9 0 |