scholarly journals Reduction of Winding AC Losses by Accurate Conductor Placement in High Frequency Electrical Machines

2020 ◽  
Vol 56 (1) ◽  
pp. 183-193 ◽  
Author(s):  
Anuvav Bardalai ◽  
David Gerada ◽  
Dmitry Golovanov ◽  
Zeyuan Xu ◽  
Xiaochen Zhang ◽  
...  
Keyword(s):  
High Frequency ◽  
Electrical Machines ◽  
Ac Losses

High-frequency electromagnetic processes in electrical machines under pulse-width voltage modulation

2008 ◽  
Vol 79 (3) ◽  
pp. 146-154 ◽  
Author(s):  
A. G. Vorontsov ◽  
Doan An Tuang ◽  
Yu. P. Kos’kin ◽  
M. V. Pronin
Keyword(s):  
High Frequency ◽  
Pulse Width ◽  
Electrical Machines ◽  
Electromagnetic Processes

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.

High frequency intergranular AC losses in EuBa2Cu3O7ceramics

1992 ◽  
Vol 5 (1S) ◽  
pp. S268-S271 ◽  
Author(s):  
E Nguyen ◽  
D Castello ◽  
J Fontcuberta ◽  
X Obradors
Keyword(s):  
High Frequency ◽  
Ac Losses

scholarly journals Design of inorganic coils for high temperature electrical machines

Open Physics ◽  
2019 ◽  
Vol 17 (1) ◽  
pp. 698-708 ◽  
Author(s):  
Hamed Elmadah ◽  
Daniel Roger ◽  
Noureddine Takorabet
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Equivalent Circuit ◽  
High Frequency ◽  
Electrical Machines ◽  
Nickel Layer ◽  
Voltage Distribution ◽  
Frequency Model ◽  
Coil Structure ◽  
Fast Transients

Abstract The paper deals with a high frequency model of inorganic coils used to build high temperature (HT∘) motor. The HT∘ wire has a nickel layer that protects the copper against oxidation and a thin inorganic coating, which has poor electrical and mechanical properties. Therefore, the coils must be designed with a special care for getting a good distribution of turn-to-turn voltage during the fast transients excited by the steep fronted voltages of the PWM inverter.A specific coil structure is proposed and a high frequency (HF) equivalent circuit able to compute the turn-to-turn voltages during transients. The voltage distribution between the coils of a stator phase is also detailed.

EVALUATION OF THE DEFECT LEVEL OF ELECTRICAL MACHINES BY HIGH-FREQUENCY METHODS

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
В. Чумак ◽  
◽  
О. Тимощук ◽  
Є. Ігнатюк ◽  
А. Стулішенко ◽  
...  
Keyword(s):  
High Frequency ◽  
Electrical Machines ◽  
Defect Level
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