single phase
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Fuel ◽  
2022 ◽  
Vol 315 ◽  
pp. 122968
Penghui Li ◽  
Lijun Yang ◽  
Qingfei Fu ◽  
Zixuan Fang

2022 ◽  
Vol 209 ◽  
pp. 114391
Sung Hwan Hong ◽  
Hae Jin Park ◽  
Gyeol Chan Kang ◽  
Young Seok Kim ◽  
Gian Song ◽  

Electronics ◽  
2022 ◽  
Vol 11 (2) ◽  
pp. 280
Michael Haider ◽  
Dominik Bortis ◽  
Grayson Zulauf ◽  
Johann W. Kolar ◽  
Yasuo Ono

The motor integration of singe-phase-supplied Variable-Speed Drives (VSDs) is prevented by the significant volume, short lifetime, and operating temperature limit of the electrolytic capacitors required to buffer the pulsating power grid. The DC-link energy storage requirement is eliminated by using the kinetic energy of the motor as a buffer. The proposed concept is called the Motor-Integrated Power Pulsation Buffer (MPPB), and a control technique and structure are detailed that meet the requirements for nominal and faulted operation with a simple reconfiguration of existing controller blocks. A 7.5 KW, motor-integrated hardware demonstrator validated the proposed MPPB concept and loss models for a scroll compressor drive used in auxiliary railway applications. The MPPB drive with a front-end CISPR 11/Class A EMI filter, PFC rectifier stage, and output-side inverter stage achieved a power density of 0.91 KW L−1 (15 W in−3). The grid-to-motor-shaft efficiency exceeded 90% for all loads over 5 kW or 66% of nominal load, with a worst-case loss penalty over a conventional system of only 17%.

Electronics ◽  
2022 ◽  
Vol 11 (2) ◽  
pp. 277
Sergei V. Zubkov ◽  
Ivan A. Parinov ◽  
Yulia A. Kuprina

A new series of layered perovskite-like oxides Bi3−xNdxTi1.5W0.5O9 (x = 0.25, 0.5, 0.75, 1.0) was synthesized by the method of high-temperature solid-state reaction, in which partial substitution of bismuth (Bi) atoms in the dodecahedra of the perovskite layer (A-positions) by Nd atoms takes place. X-ray structural studies have shown that all compounds are single-phase and have the structure of Aurivillius phases (APs), with close parameters of orthorhombic unit cells corresponding to space group A21am. The dependences of the relative permittivity ε/ε0 and the tangent of loss tgσ at different frequencies on temperature were measured. The piezoelectric constant d33 was measured for Bi3−xNdxTi1.5W0.5O9 (x = 0.25, 0.5, 0.75) compounds of the synthesized series.

2022 ◽  
Vol 1 (1) ◽  
pp. 41-48
Anvar Kadirmetov ◽  
Dmitrii Popov ◽  
Stepan Agarkov

The microstructure and phase composition of the coating obtained by plasma spraying of FeCoCrAlTiCuMo powder in an equiatomic ratio of components have been investigated. The results showed the possibility of creating a multicomponent single-phase solid solution by plasma spraying and the expediency of studying it.

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