Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
This paper is a follow-up work of the hybrid modelling of a quadrotor helicopter proposed by the authors. Aiming at the structure damages in quadrotor helicopters, a hybrid model based dynamical feedback FTC scheme is studied. The proof of the closed-loop system's stability is also presented. Verification results on a 3-DOF hovering system can show the effectiveness of the proposed FTC scheme.
A rotary energy recovery device (RERD) is widely used in a reverse osmosis desalination system. In order to maintain the device running in an available torque and obtaining a long service life, a portion of high pressure seawater is usually sacrificed to work as lubrication to reduce the friction torque of the device. However, when using such method, a certain amount of energy recovery efficiency...
This paper is based on the flywheel energy storage system (FESS), and focuses on the vector control of the permanent magnet synchronous machine (PMSM). Considering the large inertia and very low speed acceleration of the FESS, a motor control strategy to avoid speed fluctuation is advanced during the process when the system starts from zero speed. When the flywheel battery is discharged, a motor control...
Electric vehicle is a good solution to energy crisis and environment pollution. More specifically, low speed electric vehicle, whose speed is often lower than 50 km/h, is widely used for short-distance transportation in suburban areas. As the key part of electric vehicle, motor assumes an important position in the performance of the vehicle. To discuss the motor adequate for low speed application,...
An improved pole arc combination method to minimize the cogging torque in the interior permanent magnet brushless dc motor with flux-concentration type rotor is presented. Due to the magnetic saturation and relative complex structure, the cogging torque in interior permanent magnet brushless machines is more complicated than that in the surface permanent magnet brushless machines. Pole arc combination...
A modified speed sensorless direct torque control (DTC) scheme for surface permanent magnet synchronous machine (SPM) is investigated in this paper, which features in very low flux and torque ripple and almost fixed switching frequency. Instead of the switching table and hysteresis controllers in the basic DTC, a reference flux vector calculator (RFVC) is used to determine the reference stator flux...
In this paper, an improved direct torque control (DTC) scheme for surface permanent magnet synchronous machine (SPM) is investigated, which features in very low flux and torque ripple and almost fixed switching frequency. It is based on the deadbeat control of the flux and torque. Simulation and experimental results show that the flux and torque ripples are greatly reduced when compared with those...
Multiphase motor drives have many advantages over the traditional three-phase motor drives. In this paper we firstly deduce the mathematic modeling for a dual-three-phase permanent magnet synchronous motor (PMSM) according to vector space decomposition theory. Then, a sensorless vector control based on the model reference adaptive system (MRAS) is developed for a dual-three-phase PMSM and the system...
Grid connected wind turbines are fluctuating power sources that may produce flicker during continuous operation. This paper presents a simulation model of a MW-level variable speed wind turbines with a permanent magnet synchronous generator (PMSG) and a full-scale converter developed in the simulation tool of PSCAD/EMTDC. Flicker emission of this system is investigated during continuous operation...
A modified direct torque control (DTC) scheme for surface permanent magnet synchronous machine (SPM) is investigated in this paper, which features in very low flux and torque ripple and almost fixed switching frequency. It is based on the deadbeat control of the flux and torque. Simulation results show that the flux and torque ripples are greatly reduced when compared with those of the basic DTC....
In the wind energy conversion system, the wind turbine captures the wind energy. Then the generator changes it to the electrical power. So the characteristic of the wind turbine is very important. For some laboratories that donpsilat have the practical wind turbine, it is very convenience to use the wind turbine simulator instead of the real wind turbine. The paper introduces the structure and characteristic...
Because of energy shortage and environment pollution, the renewable energy, especially wind energy has become more and more considerable all over the world. Vertical-axis wind turbine (VAWT) has some advantages. The heavy parts such as gearbox, generator and control system can be placed on the ground and they can be maintained easily. The head of horizontal-axis wind turbines (HAWT) must be rotated...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.