Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Powiadomienia systemowe

Sesja wygasła!

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: AC machine

Sortuj według:

Ogranicz wyniki do:

Considerations for starting combustion engines with AC machines

Monroy Mauricio, Romero Carlos A., Henao Edison

Diagnostyka

2023

Vol. 24, No. 1

art. no. 2023102

To initiate its combustion cycles, internal combustion engines require a minimum rotational speed that can be given from several sources (muscular, electrical, pneumatic, among others). Advantages of initiating an ICE with an AC electrical machine is that it can integrate starter motor and generator in one device, provide a linear ramp of acceleration when starting, and assist the ICE in torque production. This article illustrates considerations for the design of a starting system with an AC electrical machine. Initially, criteria of torque, rotational speed and power requirements are analysed, considering resistances of compression, friction, and inertia of the slider-crank mechanism, as well as accessories, with a preliminary experimental validation. Also, types of three-phase AC electrical machines are put to comparison, as well as their associated electronic components needed for driving them in each case, concluding that AC induction machines require a complex 4-quadrant inverter. PM synchronous machines require a simpler inverter, but with highly specified power electronics components. The classical wound rotor machine requires the simplest inverter, with unidirectional power flow, less power transfer losses and less critical power electronics components. Finally, considerations for using of a battery assisted with supercapacitor as complementary DC power source are made.

A new robust approach to MCS algorithms. Application to an AC machine

Naceri F., Belkacem S.

Archives of Electrical Engineering

2006

Vol. 55, nr 2

163-178

The robustness of MCS algorithms against rapidly varying system parameters, external disturbances and system non-linearity is investigated. The MCS algorithm is a signifiant developpment of MRAC and is similary based on the hyperstability theory of Popov. The hyperstability theory guarantees the global asymptotic stability of the error vector (i.e. the difference between the reference model and system states). Finally a new approach has been successfully implemented to Field-Oriented Controlled drive. Discussion on theoretical aspects, such as, selection of a reference model, stability analysis, gain adaptive and steady state error are included. Results of simulations are also presented.

Przeanalizowano odporność algorytmów syntezy minimalnego sterownika przy szybkozmiennych wartościach parametrów układu, zakłóceniach zewnętrznych i przy nieliniowości. Algorytm syntezy minimalnego sterownika jest istotnym krokiem w rozwoju sterowania adaptacyjnego z modelem odniesienia, opartym na teorii hyperstabilności Popowa. Zapewnia ona szeroką stabilność asymetryczną wektora błędu (różnicy między stanami modelu odniesienia i układu). Nowe podejście zastosowano pomyślnie w sterowaniu polowo-zorientowanym. Przedyskutowano takie zagadnienia teoretyczne jak wybór modelu odniesienia, analizę stabilności, błąd doboru wzmocnienia i błąd w stanie ustalonym. Przedstawiono rezultaty badań symulacyjnych.