Computation of AC losses in high-temperature superconductors

1998 ◽  
Vol 310 (1-4) ◽  
pp. 62-66 ◽  
Author(s):  
Jaakko Paasi ◽  
Jorma Lehtonen ◽  
Markku Lahtinen ◽  
Lauri Kettunen
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Ac Losses

scholarly journals Measurements and Analysis of AC Losses in HTS Windings of Electrical Machine for Different Operation Modes

2021 ◽  
Vol 11 (6) ◽  
pp. 2741
Author(s):  
Sergey Zanegin ◽  
Nikolay Ivanov ◽  
Vasily Zubko ◽  
Konstantin Kovalev ◽  
Ivan Shishov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
High Temperature Superconductor ◽  
High Temperature Superconductors ◽  
Transport Current ◽  
Operating Conditions ◽  
Ac Losses ◽  
Electrical Machine ◽  
2Nd Generation ◽  
Motor Mode

The article is devoted to the study of losses in devices based on high-temperature superconductors of the 2nd generation. The complexity of the devices under study increases from a single rack coil to a winding assembled from several coils, and finally to an electric machine operating in generator mode. This is the way to experimentally study the behavior of 2nd generation high temperature superconductor (2G HTS) carrying a transport current in various conditions: self-field, external DC, and AC magnetic field. Attention is also paid to the losses in the winding during its operation from the inverter, which simulates the operating conditions in the motor mode of a propulsion system.

AC losses of YBa2Cu3O7−x high temperature superconductors

1991 ◽  
Vol 180 (5-6) ◽  
pp. 373-380 ◽  
Author(s):  
S. Zannella ◽  
L. Jansak ◽  
D. Lee ◽  
K. Salama
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Ac Losses

Overview of High Temperature Superconductor Machines

2021 ◽  
Vol 4 (4) ◽  
pp. 25-33
Author(s):  
Bruno Douine ◽  
◽  
Hocine Menana ◽  
Kevin Berger ◽  
Jean Lеvеque ◽  
...  
Keyword(s):  
High Temperature ◽  
Power Systems ◽  
High Temperature Superconductor ◽  
High Temperature Superconductors ◽  
Synchronous Machine ◽  
Recent Time ◽  
Operating Principle ◽  
Electrical Machines ◽  
Synchronous Machines ◽  
Ac Losses

Electrical machines are important parts of different power systems. The application of high temperature superconductors (HTS) in electrical machines is very promising due to high transport currents. This paper reviews various topologies of superconducting motors and generators using HTS published in the literature in recent time. It begins with a brief presentation of the HTS material used in electrical machines. The description of AC losses and cryogenic systems is done afterwards. Then we offer a striking description of the various realizations of HTS electrical machines such as half HTS synchronous machines, fully HTS synchronous machine, machines with HTS bulks and stacks. Some of these machines are totally innovative compared to conventional ones and their operating principle is strictly related to the presence of HTS materials.

Transport AC losses and nonlinear inductance in high temperature superconductors

1996 ◽  
Vol 32 (16) ◽  
pp. 1518 ◽  
Author(s):  
S.A. Awan ◽  
S. Sali ◽  
C.M. Friend ◽  
T.P. Beales
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Ac Losses ◽  
Nonlinear Inductance ◽  
Transport Ac Losses

Hysteretic ac losses in high‐temperature superconductors

1989 ◽  
Vol 54 (4) ◽  
pp. 386-388 ◽  
Author(s):  
G. Kozlowski ◽  
X. Y. Chen
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Ac Losses

Temperature Dependence of Total AC Loss in High-Temperature Superconducting Tapes

2009 ◽  
Vol 19 (4) ◽  
pp. 3637-3644 ◽  
Author(s):  
Doan N. Nguyen ◽  
Pamidi V. P. S. S. Sastry ◽  
David C. Knoll ◽  
Justin Schwartz
Keyword(s):  
Experimental Data ◽  
High Temperature ◽  
Temperature Dependence ◽  
High Temperature Superconductors ◽  
Ac Loss ◽  
Ac Losses ◽  
Transport Losses ◽  
Set Up ◽  
Interesting Behavior ◽  
The Magnetic Field

A versatile experimental facility was designed and set up to measure transport ac losses, magnetization ac losses, and total ac losses in high-temperature superconductors at variable temperatures. Several sets of measurements were carried out in the temperature range of 35 K to 100 K. Sample temperature during the measurements could be controlled within plusmn0.5 K of set temperature. Temperature dependence of transport losses reflects variation of critical current density of the tapes with temperature. Temperature dependence of magnetization losses exhibits an interesting behavior with a peak, whose position shifts to lower temperatures as the magnetic field is increased. Experimental data of ac losses at various temperatures are compared with those calculated using numerical methods. Generally, the simulated results reproduce well the experimental data.

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