Research on Residual Flux Density Measurement for Single-Phase Transformer Core Based on Energy Changes

Author(s):  
Cailing Huo ◽  
Youhua Wang ◽  
Shipu Wu ◽  
Chengcheng Liu
IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 171479-171488
Author(s):  
Cailing Huo ◽  
Shipu Wu ◽  
Yiming Yang ◽  
Chengcheng Liu ◽  
Youhua Wang

2019 ◽  
Author(s):  
Matthias Offergeld ◽  
Marc Röger ◽  
Hannes Stadler ◽  
Philip Gorzalka ◽  
Bernhard Hoffschmidt

1957 ◽  
Vol 4 ◽  
pp. 154-154
Author(s):  
Ch. L. Seeger

The first trial of equipment designed for 400 Mc./s. absolute flux density measurement was completed just prior to this symposium. Using the midday sun, the gain of a 7·5 metre Würzburg (equipped with a TE°11 circular wave-guide feed) was found by comparison with an ‘optimum’ pyramidal horn of 20·2 square wave-lengths aperture. Cable losses and signal powers were measured against the available noise power from two co-axial resistors, one at ambient temperature and the other stabilized at the boiling-point of pure nitrogen.


2014 ◽  
Vol 59 (17) ◽  
pp. 4827-4844 ◽  
Author(s):  
Woo Chul Jeong ◽  
Munish Chauhan ◽  
Saurav Z K Sajib ◽  
Hyung Joong Kim ◽  
Igor Serša ◽  
...  

2013 ◽  
Vol 811 ◽  
pp. 347-352 ◽  
Author(s):  
Athirot Mano ◽  
Narin Atiwongsangthong ◽  
Wisut Titiroongruang

The independent directional magnetic field measurement is a new technique for magnetic flux density measurement with high accuracy. This technique can reduce the limitation in term of angle that magnetic flux lines interact with Hall sensors. However, the original system limits the uniformity and symmetry of magnetic field patterns, which can cause an error for measurement system. Therefore, the aim of this research is to present the method to increase measurement accuracy of system, by improve magnetic field uniformity which can be done by using electromagnet instead of permanent magnet. The system is also improved the mechanical circle motion by using stepping motor, it is used to rotate Hall sensors in magnetic field which is generated by electromagnet. The result from experiment has shown of this method that can reduce the error percentage as 5% compare with original system. This method is shown 0.99997 of coefficient of determination, which represents to accuracy in magnetic flux density measurement range 0-1350 Gauss.


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