Temat: DC machine - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Efficiency improvement due to direct torque and flux three levels three areas control method applied to small hydroelectric power plant
Autorzy:: Kulikowski, K.
Sikorski, A.
Powiązania:: https://bibliotekanauki.pl/articles/200033.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: asynchronous machine
AC/DC/AC converter
DC/AC converter
DTC
flux control
Opis:: The paper presents a description of a new DTFC3L3A (direct torque and flux control three levels three areas) control method of induction machine as well as its comparison with the DTC method. The basis for the comparison is the switching frequency of described methods. The proposed method is optimized to reduce number of switchings (which is proportional to switching power losses) in static state, as well as it takes into account the angle which makes it possible to obtain a sinusoidal shape of flux within range of low angular frequencies of an asynchronous machine. The paper includes the results of experiments performed on a three level DC/AC inverter for both control methods.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 4; 569-574
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Modern Direct Torque and Flux Control methods of an induction machine supplied by three-level inverter
Autorzy:: Sikorski, A.
Kulikowski, K.
Korzeniewski, M.
Powiązania:: https://bibliotekanauki.pl/articles/201199.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: asynchronous machine
DC/AC inverter
DTC
flux and torque control
3-level DC/AC inverter
Opis:: This paper describes two modern direct torque and flux control methods of an induction machine supplied by a three-level inverter. Additionally, it presents a comparison of the methods both in static and dynamic states. The methods, in a specific way, make use of an increased number of active vectors of the three-level inverter in order to improve control quality and reduce switching frequency. The two methods modify the DTC method by using its advantages and eliminating, at the same time its drawbacks. In static states the comparison was based on the results of investigations performed for two different load values and three set values of angular speed, whereas in dynamic states the comparison was focused on the behavior of the machine at startup. The results of the investigations have shown that both methods give very good performance. They are characterized by both sinusoidal shape of flux and low current deformations even at low angular speeds i.e. less than 10% of the nominal value. The presented methods also allow to generate nominal flux for set zero angular speed in order to achieve excitation of the induction machine. The switching frequencies for both methods are very similar in almost the whole range of control but the methods have shown some differences in control quality, particularly for higher torque values.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 4; 771-778
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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