PL
 |
EN
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 6

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  sterowanie energooszczędne
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available remote The operation modes of a power-efficient system of control of a pumping plant variable-frequency electric drive
Kovalchuk Viktoriya, Korenkova Tetyana
Przegląd Elektrotechniczny
|
2019
|
R. 95, nr 12
148--151
EN
The possibility of using two-parameter regulation in the system of a variable-frequency electric drive of a pumping plant, taking into account changes in the current parameters of the hydraulic network, is demonstrated. The characteristics of the pump and the pipeline network during adjusting the capacity and changing the position of the stopcock at the output of the pump unit in the pressure stabilization system at the consumer are given. A block diagram of the system of power-efficient pumping unit control is proposed. It allows adjusting the reference signal in accordance with the deviation of the parameters of the hydraulic network. The curves of changes in the technological and power characteristics of the pump with one-parameter and two-parameter regulation with variable water consumption are considered. The possibility of improving the power efficiency of a pumping plant by using two-parameter control with increased water consumption is shown. It is obtained that reducing the accuracy of pressure maintenance at the consumer makes it possible to improve the efficiency of the pumping plant.
PL
W artykule wykazano możliwość zastosowania w pompowni regulacji dwuparametrowej w systemie napędu elektrycznego o zmiennej częstotliwości, z uwzględnieniem zmian aktualnych parametrów sieci hydraulicznej. Podano charakterystykę pompy i sieci rurociągów podczas dostosowywania wydajności i zmiany położenia zaworu odcinającego na wyjściu zespołu pompowego w układzie stabilizacji ciśnienia u odbiorcy. Zaproponowano schemat blokowy układu sterowania energooszczędną jednostką pompującą. Wykazano możliwość regulacji sygnału odniesienia zgodnie z odchyleniem parametrów sieci hydraulicznej. Uwzględniono krzywe zmian charakterystyki technologicznej i mocy pompy z regulacją jednoparametrową i dwuparametrową ze zmiennym zużyciem wody. Wykazano możliwość poprawy efektywności energetycznej pompowni poprzez zastosowanie sterowania dwuparametrowego ze zwiększonym zużyciem wody. Zmniejszenie dokładności utrzymania ciśnienia u konsumenta umożliwia poprawę wydajności pompowni.
2
Content available Minimum energy control of descriptor fractional discrete-time linear systems with two different fractional orders
Sajewski Ł.
International Journal of Applied Mathematics and Computer Science
|
2017
|
Vol. 27, no. 1
33--41
EN
Reachability and minimum energy control of descriptor fractional discrete-time linear systems with different fractional orders are addressed. Using the Weierstrass–Kronecker decomposition theorem of the regular pencil, a solution to the state equation of descriptor fractional discrete-time linear systems with different fractional orders is given. The reachability condition of this class of systems is presented and used for solving the minimum energy control problem. The discussion is illustrated with numerical examples.
3
Content available Minimum energy control of fractional positive continuous-time linear systems with bounded inputs
Kaczorek T.
International Journal of Applied Mathematics and Computer Science
|
2014
|
Vol. 24, no. 2
335--340
EN
A minimum energy control problem for fractional positive continuous-time linear systems with bounded inputs is formulated and solved. Sufficient conditions for the existence of a solution to the problem are established. A procedure for solving the problem is proposed and illustrated with a numerical example.
4
Content available Minimum energy control of fractional descriptor positive discrete-time linear systems
Kaczorek T.
International Journal of Applied Mathematics and Computer Science
|
2014
|
Vol. 24, no. 4
735--743
EN
Necessary and sufficient conditions for the positivity and reachability of fractional descriptor positive discrete-time linear systems are established. The minimum energy control problem for descriptor positive systems is formulated and solved. Sufficient conditions for the existence of a solution to the minimum energy control problem are given. A procedure for computation of optimal input sequences and a minimal value of the performance index is proposed and illustrated by a numerical example.
5
Content available Minimum energy control of positive continuous-time linear systems with bounded inputs
Kaczorek T.
International Journal of Applied Mathematics and Computer Science
|
2013
|
Vol. 23, no. 4
725--730
EN
The minimum energy control problem for positive continuous-time linear systems with bounded inputs is formulated and solved. Sufficient conditions for the existence of a solution to the problem are established. A procedure for solving the problem is proposed and illustrated with a numerical example.
6
Energy efficient control of permanent magnets synchronous motor
Kanarek M.
Poznan University of Technology Academic Journals. Electrical Engineering
|
2011
|
No. 65
45--54
EN
A model of the motor, that takes into account core losses and copper losses, has been presented. The relation between rotor speed and both types of losses has been established on the basis of equivalent circuit and dynamic equations. Gained knowledge has been used to proposed energy-optimal vector control strategy with non-zero current in direct axis. Simulation results confirmed the validity of the applied solution for fan applications.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.