Results 251 to 260 of about 349,224 (309)

Modelling, analysis, and stability assessment of wind turbine generator connected to a low inertia AC-DC microgrid with frequency support capability. [PDF]

Sci Rep
Zenhom IA, Marei MI, Mohamed AMI.
europepmc   +1 more source

Digital control of a variable-speed, thyristor-controlled, commutatorless machine

, 1973
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Rectifier-inverter variable speed drive for a synchronous machine

, 1979
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Scheduling Multiple Variable-Speed Machines

Operations Research, 1994
We examine scheduling problems where we control not only the assignment of jobs to machines, but also the time used by the job on the machine. For instance, many tooling machines allow control of the speed at which a job is run. Increasing the speed incurs costs due to machine wear, but also increases throughput. We discuss some fundamental scheduling
Michael A Trick
openaire   +4 more sources

Multiphase Electric Machines for Variable-Speed Applications

IEEE Transactions on Industrial Electronics, 2008
Although the concept of variable-speed drives, based on utilization of multiphase machines, dates back to the late 1960s, it was not until the mid- to late 1990s that multiphase drives became serious contenders for various applications. These include electric ship propulsion, locomotive traction, electric and hybrid electric vehicles, ldquomore ...
Emil Levi
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Fabrication of Variable Speed Lamina Cutting Machine

2021
Cutting plays a key role in manufacturing. The present work focus on development of lamina cutting machine has variable speed which is achieved by connecting the electronic speed control unit, where it consists of different electronic parts. Basic jigsaw J-819 machine was purchased from local market, and DC motor is used for operating the machine by ...
Gajavalli Venkata Pavan Gopi Nikhil, Nadendla Srinivasababu   +1 more
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A centre-manifold analysis of variable speed machining

Dynamical Systems, 2003
The mathematical models representing chatter dynamics have been cast as differential equations with delay. The suppression of regenerative chatter by spindle speed variation is attracting increasing attention. In this paper, we study nonlinear delay differential equations with periodic delays which model the machine tool chatter with continuously ...
N. Sri Namachchivaya, H. J. Van Roessel
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Analytical Stability Analysis of Variable Spindle Speed Machining

Journal of Manufacturing Science and Engineering, 1999
A new analytical model to predict the chatter stability of variable spindle speed machining is presented. This model is based on transforming the linear differential equations with time varying delay to the solution of an infinite order characteristic equation.
S. Jayaram, S. G. Kapoor, R. E. DeVor
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Variable speed convertor-fed synchronous machines

IFAC Proceedings Volumes, 1974
Summary After showing the advantage to be gained in adopting auto-piloting for the synchronous machine by using a rotor position detector to control the static supply converter, the various methods of feeding the machine are defined. The methods of analysing the systems used to provide the different types of feed are presented.
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