High-Accuracy Measurement of Coma with the Optimized Alternating Phase-shifting Mask with a Specific Phase Width

2019 ◽  
Vol 18 (1) ◽  
pp. 381-390
Author(s):  
Zicheng Qiu ◽  
Xiangzhao Wang ◽  
Qiongyan Yuan ◽  
Fan Wang



2021 ◽  
Vol 46 (20) ◽  
pp. 5207
Author(s):  
K. Miao ◽  
J. W. Zhang ◽  
X. L. Sun ◽  
S. G. Wang ◽  
A. M. Zhang ◽  
...  


Author(s):  
Azzeddine Ferrah ◽  
Mounir Bouzguenda ◽  
Jehad M. Al-Khalaf Bani Younis

Large and small single-phase and three-phase induction motors are commonly used in industrial applications. The present work represents an attempt towards the design of a high accuracy system for the measurement of fractional horsepower (FHP) induction motor losses and efficiency. The calorimeter designed and built is capable of measuring heat losses of up to 1 kW with an overall accuracy better than 3%. During all tests, ambient temperature, humidity, motor speed and motor frame temperature were recorded using precise digital instruments. The inlet, outlet temperatures and resulting losses were recorded automatically using a high accuracy 12-bit data acquisition system. The preliminary results obtained demonstrate the suitability of the designed calorimeter for the accurate measurement of losses in FHP induction motors.





2018 ◽  
Vol 47 (9) ◽  
pp. 906008
Author(s):  
孙兴伟 Sun Xingwei ◽  
于欣玉 Yu Xinyu ◽  
董祉序 Dong Zhixu ◽  
杨赫然 Yang Heran


Measurement ◽  
2020 ◽  
Vol 156 ◽  
pp. 107605 ◽  
Author(s):  
Tongzhen Xing ◽  
Haibin Zhu ◽  
Lu Wang ◽  
Guangyan Liu ◽  
Qinwei Ma ◽  
...  


2015 ◽  
Vol 40 (18) ◽  
pp. 4249 ◽  
Author(s):  
K. Miao ◽  
J. W. Zhang ◽  
X. L. Sun ◽  
S. G. Wang ◽  
A. M. Zhang ◽  
...  


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