Results 11 to 20 of about 3,387,209 (298)
Measurement of AC loss down to 25 K in a REBCO racetrack coil for electrical aircraft motor [PDF]
Scientific Reports, 2022 The development of full superconducting motors for electric distributed aircraft propulsion requires to test the stator coils at the operation temperature, usually between 20 and 40 K.
J. Kováč +7 more
doaj +2 more sources
AC Losses in High Tc Superconductors - AC Loss Characteristics of Tapes and Power Transmission Cables - [PDF]
TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan), 2010 The AC loss characteristics of high Tc superconductors are reviewed. AC losses are organized according to their generating mechanism and the magnetic field components generating them. Useful analytical formulae of hysteresis losses are presented for the superconductor slab exposed to a parallel magnetic field, for the thin strip exposed to a transverse
雨宮, 尚之
core +4 more sources
CARRIER SIGNAL INJECTION BASED SENSORLESS CONTROL OF PERMANENT MAGNET BRUSHLESS AC MACHINES [PDF]
, 2012 This thesis is focused on the carrier signal injection based sensorless control of Permanent Magnet (PM) Brushless AC (BLAC) machines. Based on the machine saliency property, carrier signal injection based sensorless techniques have been well developed ...
Gong, Liming
core +6 more sources
Energies, 2022 This paper presents an accurate quasi-analytical approximation of frequency-dependent ac resistance of single rectangular conductors. In this work, first, a two-dimensional analytical ac resistance of rectangular conductors is derived.
Barzan Tabei +3 more
doaj +1 more source
AC Loss Characteristics of HTS Novel Twisted Cables Composed of Soldered-Stacked-Square (3S) Wires
Energies, 2022 Compared with traditional cables, superconducting multi-stage cables have the natural advantages of greater transmission power and less energy loss, which have gradually attracted attention.
Zhuyong Li +4 more
doaj +1 more source
Experimental Setup for Measurement of AC Loss in HTS under Rotating Magnetic Field
Energies, 2022 High-temperature superconducting materials have shown great potential for the design of large-scale industry applications. However, they are complicated under AC conditions, resulting in penalties such as power loss or AC loss.
Wafa Ali Soomro +5 more
doaj +1 more source
Alternating Current Loss of Superconductors Applied to Superconducting Electrical Machines
Energies, 2021 Superconductor technology has recently attracted increasing attention in power-generation- and electrical-propulsion-related domains, as it provides a solution to the limited power density seen by the core component, electrical machines.
Hongye Zhang +4 more
doaj +1 more source
AC Loss Reduction in HTS Coil Windings Coupled With an Iron Core Using Flux Diverters
IEEE Access, 2023 Iron cores are widely employed in high temperature superconducting (HTS) power devices to enhance the magnetic field and improve the power density. In spite of these benefits, the presence of iron cores leads to a substantial increase in AC loss within ...
Yue Wu +5 more
doaj +1 more source
Effect of Magnetic Properties of Magnetic Composite Tapes on Motor Losses
Energies, 2022 Alternating current (AC) copper losses in motors increase with carrier frequency of the pulse width modulation (PWM) and are further increased by leakage flux of the permanent magnet. Therefore, AC copper losses increase with motor speed.
Ryo Yoshida +9 more
doaj +1 more source
Machines, 2022 AC copper loss from stator winding is one of the main losses of the high-speed permanent magnet machines (HSPMMs) and directly affects the performance of the machines.
Guanghui Du +4 more
doaj +1 more source