Results 271 to 280 of about 349,224 (309)
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Development of a variable speed G-M machine
Cryogenics, 1992Abstract There is a need for more compact and versatile cryocoolers for instrument cooling and vacuum pump applications. The development of a variable speed, compact, pneumatically actuated G-M cryocooler is described. The influence of speed on P - V diagrams at various temperatures is illustrated and cycle modifications to promote higher ...
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Niche for Variable Speed Machines: Case Study of Tehri PSP
2020 IEEE Power & Energy Society General Meeting (PESGM), 2020With the advent of semiconductor technology in power system the variable speed machines have become common practice world over. In the beginning, variable speed drives were mainly cyclo-converters. With the growth in semiconductor technology, IGBT, IGCT etc.
L.P. Joshi, Madhwi Kumari
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High Efficiency Wind Generators with Variable Speed Dual-Excited Synchronous Machines
2007 International Conference on Clean Electrical Power, 2007Wind power seem to be one of the most interesting technology for electrical energy generation by renewable sources. It is necessary to set up carefully the wind turbine taking into account that the wind speed is variable with the time and there is a fluctuation of power output of wind energy conversion systems.
PIEGARI, LUIGI, R. RIZZO, P. TRICOLI
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Digital computer simulation of variable-speed PWM inverter-machine drives
IEE Proceedings B Electric Power Applications, 1983It is predicted that, with the increasing availability of digital computing facilities, computer-aided design will play an increasingly important and cost-effective role in the design of variable-speed drives (VSD). The paper describes the detailed development of an extremely versatile PWM VSD package which has the potential for investigating a wide ...
Bowes, Sid R, Clements, R R
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Controllability of HTS Induction/Synchronous Machine for Variable Speed Control
IEEE Transactions on Applied Superconductivity, 2013Our group has been studying a high-temperature superconductor induction/synchronous machine (HTS-ISM). This motor has the same structure as a conventional induction motor. Replacing secondary windings with HTS windings, however, the HTS-ISM has several intrinsic features, i.e., high torque density and high efficiency.
H. Kitano +7 more
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Novel reluctance machine concepts for variable speed drives
[1991 Proceedings] 6th Mediterranean Electrotechnical Conference, 2002Little effort has been expended on improving the torque capability of various types of synchronous reluctance machines for potential use in motor drives. Based on preliminary work, it appears that substantial improvements can be made in the design of such motor drives, resulting in performance characteristics which could match or exceed that of the ...
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Sensorless control of variable speed drives using switched reluctance machine
2017 IEEE International Symposium on Sensorless Control for Electrical Drives (SLED), 2017The paper deals with various sensorless techniques for SRM. The theory of most these techniques is described and their advantages and disadvantages are discussed. Simulation of a SRM traction drive for an electric vehicle was created and experimentally verified.
Pavel Soviccnka +3 more
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The variable-speed reluctance machine with cageless barrier rotor
Archiv für Elektrotechnik, 1993The frequency converter supply of rotating-field machines stimulates an interest in machine variants where induced rotor currents are avoided and only imposed rotor currents are permitted.
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INCREASING BASRENG PRODUCTION USING VARIABLE SPEED DRIVE BASED CUTTING MACHINES
Community Development Journal : Jurnal Pengabdian Masyarakat, 2023Pelaksanaan progam pengabdian masyarakat ini bertujuan untuk menerapkan teknologi yang bermanfaat berupa mesin pemotong basreng untuk meningkatkan kualitas produksi dan kebutuhan konsumen bagi pelaku usaha Della Muda di Desa Madiredo Kecamatan Pujon Kabupaten Malang. Para pelaku usaha Della Muda memotong basreng masih dengan cara konvensional, sehingga
Sujito, Sujito +5 more
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The design of large machines for variable speed drives
IEE Colloquium Design, Operation and Maintenance of High Voltage (3.3kV to 11kV) Electric Motors for Process Plant, 1999The advantages of the squirrel cage induction motor are well documented and known to users; its only disadvantage is that it is fixed speed. In many applications this is a serious setback and has been the main reason for "hanging on" to DC machines with their higher first cost and maintenance costs.
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