Results 41 to 50 of about 728,193 (202)

Experimental study on the influence of high frequency PWM harmonics on the losses of induction motor

Energy Reports, 2022
For the purpose of studying the influence of high frequency PWM harmonics on the losses of induction motor, this paper first introduces the latest international standard IEC/TS 60034-2-3 for the separation of the losses and the measurement of the ...
Meihui Jiang, Jun Tian, Hui Hwang Goh, Jiawei Yi, Shenwang Li, Dongdong Zhang, Thomas Wu   +6 more
doaj   +1 more source

Measurement of the Dielectric Constant and Loss Tangent of Thallium Mixed Halide Crystals KRS-5 and KRS-6 at 95 GHz [PDF]

, 1981
The dielectric constants and loss tangents of KRS-5 and KRS-6 thallium halide mixed crystals have been measured at 95 GHz using both the shorted waveguide (SWG) reflection method and the Fabry-Perot (F-P) transmission method on samples filling standard ...
Bridges, William B., Klein, Marvin B., Schweig, Edgard   +2 more
core   +1 more source

Calculation for stator loss of high-speed permanent magnet synchronous machine in torque-speed envelope and restraint approach for circulating current in windings

CES Transactions on Electrical Machines and Systems, 2018
Iron loss and copper loss are the significant parts of electrical loss of machines, which are the major parts particularly under high frequency condition. High-speed permanent magnet synchronous machines (HS-PMSM) have the benefits of high power density,
Yanan Yu, Deliang Liang, Zhe Liang, Qiji Ze   +3 more
doaj   +1 more source

An Improved Direct Predictive Torque Control for Torque Ripple and Copper Loss Reduction in SRM Drive

Applied Sciences, 2023
This paper introduces a direct predictive torque control (DPTC) method to minimize the torque ripple and copper loss of the switched reluctance motor (SRM). Generally, there is a problem with torque ripple during the SRM’s commutation.
Linhao Sheng, Guofeng Wang, Yunsheng Fan, Jian Liu, Di Liu, Dongdong Mu   +5 more
doaj   +1 more source

The Voltage Control Strategy for Doubly Salient Electromagnetic Generator With Active Rectifier Based on Optimal Current Distribution

IEEE Access
The doubly salient electromagnetic generator (DSEG) has the advantages of simple structure, high-temperature and high-speed environment adaptability, high reliability, which can build a competitive aerospace brushless DC starting/generation system.
Weifeng Liu, Yulong Tao, Xiaoli Meng
doaj   +1 more source

Pulse jet electrodeposition of nanocrystalline copper and its application as an electrical discharge machining electrode

International Journal of Electrochemical Science, 2020
A nanocrystalline copper electrode material was fabricated using the pulse jet electrodeposition method on a stainless steel rod. The microstructure evolution and grain size were examined using scanning electron microscopy and X-ray diffraction.
Hui Fan, Yangpei Zhao, Jie Jiang, Shankui Wang, Wei Shan, Rulin Ma   +5 more
doaj   +1 more source

Transmission line for S-band masers [PDF]

, 1975
Transmission-line is coaxial. Its outer conductor is made of thin-wall stainless-steel tube; inside is plated with 0.0025 mm copper and 0.0003 mm gold.
Clauss, R. C., Wiebe, E. R.
core   +1 more source

Minimization of Copper Losses in Copper Smelting Slag During Electric Furnace Treatment [PDF]

JOM, 2012
In the quest to achieve the highest metal recovery during the smelting of copper concentrates, this study has evaluated the minimum level of soluble copper in iron-silicate slags. The experimental work was performed under slag-cleaning conditions for different levels of Fe in the matte and for a range of Fe/SiO2 ratios in the slag. All experiments were
Pascal Coursol, Nubia Cardona Valencia, Phillip Mackey, Stacy Bell, Boyd Davis   +4 more
openaire   +1 more source

Corrosion Behavior of Work Hardened SnPb-Solder Affected Copper in the Bay of Bengal Water Environment

Advances in Materials Science and Engineering, 2022
Copper and its alloys are extensively used in marine applications due to high corrosion resistant behavior. But the corrosion immunity of copper varies with the environmental factors especially the sea water ingredients.
M. Muzibur Rahman, S. Reaz Ahmed, M. Salim Kaiser   +2 more
doaj   +1 more source

Role of copper efflux in pneumococcal pathogenesis and resistance to macrophage-mediated immune clearance [PDF]

, 2015
In bacteria, the intracellular levels of metals are mediated by tightly controlled acquisition and efflux systems. This is particularly true of copper, a trace element that is universally toxic in excess.
Burnham, Corinna, Johnson, Michael D L, Kehl-Fie, Thomas E, Kelly, Jacqueline, Klein, Roger, Mann, Beth, Rosch, Jason W   +6 more
core   +2 more sources