self-excited


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self-excited

adj
1. (Electronics) (of an electrical machine) having the current for the magnetic field system generated by the machine itself or by an auxiliary machine coupled to it
2. (Electronics) (of an oscillator) generating its own energy and depending on resonant circuits for frequency determination

self′-excit′ed



adj.
having magnets that are excited by the electric current produced: a self-excited generator.
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References in periodicals archive ?
Self-excited wound-field synchronous motors without rare earth magnets are suggested.
These vibrations can be categorized into three different types, free vibrations, forced vibrations and self-excited vibrations [1].
Singaravelu and Velusami presented the capacitive VAR requirements to do the desired voltage regulation under changeable speed and load situations of the self-excited one-phased IG and three-phased SEIG with changeable number of poles [11].
Part 3 Adjusting rotor NP to work without limitations associated with the phenomenon of self-excited oscillation of the blades on the block No.
The self-excited induction generator driven by variable speed wind turbine, are so popular in isolated wind powered electric generation application because of their simple structure, robustness and they do not need any external power supply.
Based on the quasi-steady theory, the aerodynamic forces per unit span in the global axes are composed of three wind loading components, namely, the steady aerodynamic forces, the buffeting forces due to the fluctuating wind components u and w, and the self-excited forces induced by interaction between bridge and wind motions [10-12].
The 53 papers discuss such matters as modeling operating modes of centrifugal pumps, replaceable hydraulic parts in spiral volute pumps, solutions for increasing the bearing capacity of thrust bearings, the lubrication regimes of mechanical face seals, elastic bellows prepared by selective laser sintering, and damping self-excited pressure pulsations in a petro-diesel pipeline.
This way, the task of guaranteeing the stability of the technological system by reducing the level of self-excited oscillations is one of the key issues in edge cutting machining, which becomes particularly topical in the case of the final polishing of products on automated machines, and machines with computer numerical control [3], [5], [9].
Among the topics are wave packets as a model of localized disturbances propagating along cables, a system for measuring a child's foot pressure on a shoe sole, laboratory research on energy harvesting of ionic polymer metal composites, predicting the shape of non-ferrous pipe elements processed by electro-dynamic forming, and analyzing the dependence between stress change and resonance frequency for self-excited acoustical systems.
The solar magnetic field and the activity cycle originate in a self-excited dynamo mechanism based upon convective flows and rotation in the outer third of the solar radius.
This self-excited cutting phenomenon can become unstable, and chatter vibrations grow until the tool jumps out of the cut, ruins the expected surface tolerances and can even break under excessive cutting forces.
The above suggestion is based on the idea about the proximity of the frequencies of self-excited oscillations, characteristic of a turning system, to its natural frequencies as a result of the weak dissipativity.