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Rotor (electric)

About: Rotor (electric) is a research topic. Over the lifetime, 179978 publications have been published within this topic receiving 1206167 citations. The topic is also known as: electric motor rotor & blades.


Papers
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Journal ArticleDOI
TL;DR: In this paper, the simulation results of a grid-connected wind driven doubly fed induction machine (DFIM) together with some real machine performance results are presented for operating conditions below and above synchronous speed, which are actually achieved by a double-sided PWM converter joining the machine rotor to the grid.
Abstract: This paper presents the simulation results of a grid-connected wind driven doubly fed induction machine (DFIM) together with some real machine performance results. The modeling of the machine considers operating conditions below and above synchronous speed, which are actually achieved by means of a double-sided PWM converter joining the machine rotor to the grid. In order to decouple the active and reactive powers generated by the machine, stator-flux-oriented vector control is applied. The wind generator mathematical model developed in this paper is used to show how such a control strategy offers the possibility of controlling the power factor of the energy to be generated.

800 citations

Journal ArticleDOI
TL;DR: In this paper, a new direct power control (DPC) strategy for a doubly fed induction generator (DFIG)-based wind energy generation system is presented, which is based on the direct control of stator active and reactive power by selecting appropriate voltage vectors on the rotor side.
Abstract: This paper presents a new direct power control (DPC) strategy for a doubly fed induction generator (DFIG)-based wind energy generation system. The strategy is based on the direct control of stator active and reactive power by selecting appropriate voltage vectors on the rotor side. It is found that the initial rotor flux has no impact on the changes of the stator active and reactive power. The proposed method only utilizes the estimated stator flux so as to remove the difficulties associated with rotor flux estimation. The principles of this method are described in detail in this paper. The only machine parameter required by the proposed DPC method is the stator resistance whose impact on the system performance is found to be negligible. Simulation results on a 2 MW DFIG system are provided to demonstrate the effectiveness and robustness of the proposed control strategy during variations of active and reactive power, rotor speed, machine parameters, and converter dc link voltage

731 citations

Journal ArticleDOI
TL;DR: A nonlinear adaptive state feedback input-output linearizing control is designed for a fifth-order model of an induction motor which includes both electrical and mechanical dynamics under the assumptions of linear magnetic circuits.
Abstract: A nonlinear adaptive state feedback input-output linearizing control is designed for a fifth-order model of an induction motor which includes both electrical and mechanical dynamics under the assumptions of linear magnetic circuits. The control algorithm contains a nonlinear identification scheme which asymptotically tracks the true values of the load torque and rotor resistance which are assumed to be constant but unknown. Once those parameters are identified, the two control goals of regulating rotor speed and rotor flux amplitude are decoupled, so that power efficiency can be improved without affecting speed regulation. Full state measurements are required. >

723 citations

Journal ArticleDOI
TL;DR: In this paper, a simple doubly fed induction generator (DFIG) based wind turbine model was developed for real and reactive power production in which the power converter is simulated as a controlled voltage source, regulating the rotor current.
Abstract: Due to its many advantages such as the improved power quality, high energy efficiency and controllability, etc. the variable speed wind turbine using a doubly fed induction generator (DFIG) is becoming a popular concept and thus the modeling of the DFIG based wind turbine becomes an interesting research topic. Fundamental frequency models have been presented but these models are often complex with significant numerical overhead as the power converter block consisting of power control, rotor side and grid side converter control and DC link are often simulated in detail. This paper develops a simple DFIG wind turbine model in which the power converter is simulated as a controlled voltage source, regulating the rotor current to meet the command of real and reactive power production. This model has the form of traditional generator model and hence is easy to integrate into the power system simulation tool such as PSS/E. As an example, the interaction between the Arklow Bank Wind Farm and the Irish National Grid was simulated using the proposed model. The model performance and accuracy was also compared with the detailed model developed by DIgSILENT. Considering the simplification adopted for the model development, the limitation and applicability of the model were also discussed in this paper.

711 citations

Patent
01 May 2002
TL;DR: In this paper, a joint locking mechanism for a mechanical arm is described, which includes an end shaft and a shaft base which are arranged on the arm pole, supported by the shaft base.
Abstract: The utility model relates to a joint locking mechanism for mechanical arm which includes an end shaft and a shaft base which are arranged on the arm pole. An end shaft is supported by the shaft base. The end shaft is provided with an electromagnetic clutch which has a semi clutch. The electromagnetic clutch is provided with an electromagnetic coil, a gag bit and a plurality of stationary plates and fixed with the shaft base. The semi clutch with a plurality of rotor plates is fixed with the end shaft. The stationary plates and the rotor plates are arranged at intervals and overlapped with the surface of the gag bit. The gag bit is provided with a spring which enables the stationary plates connected with the rotor plates through friction and makes the rotor plates stop. The utility model has the advantages of good fastening result, accurate fixing and convenient and flexible use.

672 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20242
20232,099
20224,661
20213,859
20206,838
20198,347