Topology Evaluation of a Slotless High-Speed Electrical Machine with Stator Core Made of an Amorphous Alloy for the Aerospace Industry

2017 ◽  
Vol 10 (3) ◽  
pp. 131 ◽  
Author(s):  
Flur Ismagilov ◽  
Vyacheslav Vavilov ◽  
Vladimir Bekuzin ◽  
Valentina Ayguzina
Keyword(s):  
Amorphous Alloy ◽  
High Speed ◽  
Aerospace Industry ◽  
Electrical Machine ◽  
Stator Core

scholarly journals HIGH-SPEED ELECTRICAL MACHINE WITH RADIAL MAGNETIC FLUX AND STATOR CORE MADE OF AMORPHOUS MAGNETIC MATERIAL. TECHNOLOGIES, TRENDS AND PERSPECTIVE OF DEVELOPMENT

2018 ◽  
Vol 86 ◽  
pp. 69-82 ◽  
Author(s):  
Flur R. Ismagilov ◽  
Wenming Tong ◽  
Viacheslav Evgenievich Vavilov ◽  
Denis Valerievich Gusakov ◽  
Valentina V. Ayguzina
Keyword(s):  
Magnetic Material ◽  
Magnetic Flux ◽  
High Speed ◽  
Electrical Machine ◽  
Stator Core ◽  
Amorphous Magnetic Material

scholarly journals Reliability-Oriented Design of Inverter-Fed Low-Voltage Electrical Machines: Potential Solutions

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4144
Author(s):  
Yatai Ji ◽  
Paolo Giangrande ◽  
Vincenzo Madonna ◽  
Weiduo Zhao ◽  
Michael Galea
Keyword(s):  
Power Density ◽  
High Speed ◽  
High Performance ◽  
Low Voltage ◽  
Electrical Machines ◽  
Design Stage ◽  
Switching Frequency ◽  
Special Focus ◽  
Electrical Machine ◽  
Engineering Approach

Transportation electrification has kept pushing low-voltage inverter-fed electrical machines to reach a higher power density while guaranteeing appropriate reliability levels. Methods commonly adopted to boost power density (i.e., higher current density, faster switching frequency for high speed, and higher DC link voltage) will unavoidably increase the stress to the insulation system which leads to a decrease in reliability. Thus, a trade-off is required between power density and reliability during the machine design. Currently, it is a challenging task to evaluate reliability during the design stage and the over-engineering approach is applied. To solve this problem, physics of failure (POF) is introduced and its feasibility for electrical machine (EM) design is discussed through reviewing past work on insulation investigation. Then the special focus is given to partial discharge (PD) whose occurrence means the end-of-life of low-voltage EMs. The PD-free design methodology based on understanding the physics of PD is presented to substitute the over-engineering approach. Finally, a comprehensive reliability-oriented design (ROD) approach adopting POF and PD-free design strategy is given as a potential solution for reliable and high-performance inverter-fed low-voltage EM design.

scholarly journals Evaluation of stator core loss of high speed motor by using thermography camera

AIP Advances ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 047609
Author(s):  
Takeru Sato ◽  
Masato Enokizono
Keyword(s):  
High Speed ◽  
Core Loss ◽  
Stator Core

Synthesis and Analysis of a Combined Magnetic and Gas Dynamic Suspension for a Model Range of New-Generation High-Speed Micro Gas Turbine Power Units

2021 ◽  
pp. 5-17
Author(s):  
Sergey A. GANDZHA ◽  
◽  
Nikolay I. NEUSTROEV ◽  
Pavel A. TARANENKO ◽  
◽  
...  
Keyword(s):  
Gas Turbine ◽  
High Speed ◽  
Turbine Unit ◽  
Electrical Machine ◽  
Gas Turbine Unit ◽  
Micro Gas Turbine ◽  
Gas Dynamic ◽  
Study Results ◽  
Generator Design ◽  
New Generation

The modern power industry is characterized by intense development of distributed generation, with which numerous sources of different capacities are connected into a single network. This makes it possible to improve the reliability of the entire system, since the probability of several sources to fail simultaneously is quite low. Electric generation based on high-speed gas turbine units accounts for a significant share in the overall balance, due to which scientific research and new engineering solutions in this area are important and relevant. An innovative design of a high-speed gas turbine unit based on a switched axial generator is proposed. This electrical machine has a diamagnetic armature, which eliminates magnetic losses, due to which better efficiency of the power unit is achieved and its design is simplified. The high speed of rotation and the presence of critical resonant rotor speeds generated the need to adopt appropriate engineering decisions in regard of its supports. A combined suspension involving the use of magnetic and gas-dynamic bearings is proposed. The magnetic bearings support the gas turbine unit operation at low speeds during its acceleration, and the gas-dynamic bearings support its operation at high nominal speed. The generator design and the combined suspension layout are shown. The numerical analyses of magnetic and gas-dynamic bearings for a gas turbine unit for a capacity of 100 kW and rotation speed of 70 000 rpm are given. The study results can be used for a series of gas turbine units with capacities ranging from 10 to 500 kW. In our opinion, this concept is competitive with modern analogs with a radial generator design.

The Strength Analysis of Rotor Sleeve and PM for High-Speed Electrical Machine

2011 ◽  
Vol 338 ◽  
pp. 477-480 ◽  
Author(s):  
Hong Chang Ding ◽  
Lin Jing Xiao
Keyword(s):  
Theoretical Calculation ◽  
Permanent Magnet ◽  
High Speed ◽  
High Strength ◽  
Strength Analysis ◽  
Electrical Machine ◽  
Interference Fit ◽  
Result Show ◽  
High Rotation Speed ◽  
Ansys Workbench

For high-speed permanent magnet (PM) electrical machine, the PM material has very small tensile stress, and it can’t withstand the huge centrifugal force. So, a high-strength sleeve with interference fit is necessary to protect the PM. This paper mainly analyzes the strength of rotor sleeve and PM. It deduces the theoretical calculation method of the strength according to Lame equation, and it also analyzes the stress of sleeve and PM by ANSYS Workbench. The result show that the theoretical calculation value is closely to the ANSYS result, and it can meet the requirements of protecting the permanent magnet in high rotation speed.

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