Dynamic hysteresis loop measuring equipment

1952 ◽  
Vol 71 (6) ◽  
pp. 518-521 ◽  
Author(s):  
H. W. Lord
Keyword(s):  
Hysteresis Loop ◽  
Measuring Equipment ◽  
Dynamic Hysteresis

Elastic characteristics of isolated segments of human aortas under dynamic conditions

1959 ◽  
Vol 14 (1) ◽  
pp. 55-59 ◽  
Author(s):  
Freeman W. Cope
Keyword(s):  
Hysteresis Loop ◽  
Thoracic Aorta ◽  
Measuring Equipment ◽  
Time Lag ◽  
Measuring System ◽  
Time Lags ◽  
Descending Thoracic Aorta ◽  
System A ◽  
Sufficient Magnitude ◽  
Elastic Characteristics

When isolated segments of human descending thoracic aorta were caused to change their volume rapidly and continuously in sinusoidal fashion with pulse pressures and pulse rates maintained in the physiological range, the resulting pressure-volume curves showed slight but consistent increases in stiffness, compared to pressure-volume curves obtained on the same specimens when inflated stepwise. There was introduced into the pressure measuring system a time lag of sufficient magnitude to eliminate the hysteresis loop. The extent of hysteresis in the aorta was not determined because time lags in the aorta could not be distinguished from time lags in the measuring equipment. Submitted on September 10, 1958

Dynamic hysteresis loop in a ferroelectric heterostructure

2018 ◽  
Vol 56 (1) ◽  
pp. 185-192 ◽  
Author(s):  
Lian Cui ◽  
Haiying Cui ◽  
Yuchun Li
Keyword(s):  
Hysteresis Loop ◽  
Dynamic Hysteresis

scholarly journals The theorem about the transformer excitation current waveform mapping into the dynamic hysteresis loop branch for the sinusoidal magnetic flux case

2015 ◽  
Vol 12 (1) ◽  
pp. 33-52
Author(s):  
Nenad Petrovic ◽  
Velibor Pjevalica ◽  
Vladimir Vujicic
Keyword(s):  
Magnetic Flux ◽  
Hysteresis Loop ◽  
Hysteresis Loops ◽  
Stationary Regime ◽  
Interpolation Polynomial ◽  
Magnetic Core ◽  
Excitation Current ◽  
Approximation Accuracy ◽  
Dynamic Hysteresis ◽  
Chebyshev Nodes

This paper analyses aspects of the approximation theory application on the certain subsets of the measured samples of the transformer excitation current and the sinusoidal magnetic flux. The presented analysis is performed for single-phase transformer case, Epstein frame case and toroidal core case. In the paper the theorem of direct mapping the transformer excitation current in the stationary regime is proposed. The excitation current is mapped to the dynamic hysteresis loop branch (in further text DHLB) by an appropriate cosine transformation. This theorem provides the necessary and satisfactory conditions for above described mapping. The theorem highlights that the transformer excitation current under the sinusoidal magnetic flux has qualitatively equivalent information about magnetic core properties as the DHLB. Furthermore, the theorem establishes direct relationship between the number of the transformer excitation current harmonics and their coefficients with the degree of the DHLB interpolation polynomial and its coefficients. The DHLB interpolation polynomial is calculated over the measured subsets of samples representing Chebyshev nodes of the first and the second kind. These nonequidistant Chebyshev nodes provides uniform convergence of the interpolation polynomial to the experimentally obtained DHLB with an excellent approximation accuracy and are applicable on the approximation of the static hysteresis loops and the DC magnetization curves as well.

scholarly journals Research on the Dynamic Hysteresis Loop Model of the Residence Times Difference (RTD)-Fluxgate

Sensors ◽  
2013 ◽  
Vol 13 (9) ◽  
pp. 11539-11552 ◽  
Author(s):  
Yanzhang Wang ◽  
Shujun Wu ◽  
Zhijian Zhou ◽  
Defu Cheng ◽  
Na Pang ◽  
...  
Keyword(s):  
Hysteresis Loop ◽  
Loop Model ◽  
Residence Times ◽  
Dynamic Hysteresis
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