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Permanent Magnet Synchronous Motors (PMSMs) operating among wide speed range needs optimal flux-weakening method to reach to higher speed level. For motors whose critical point locates within the current limit circle, two different flux-weakening algorithms are discussed comparatively in this paper. One is the traditional feedback flux-weakening control strategy, the other is a revised feedback flux-weakening...
This paper proposed a new flux linkage detection method for direct instantaneous torque control (DITC) for switched reluctance motor (SRM). The proposed flux linkage detection method is a fast method without clamping devices. It consists of measuring and calculating steps. In the measuring step, at the intermediate position, current curves are measured under current chopper control (CCC). At the aligned...
The dual three-phase permanent magnet synchronous motor (DTP PMSM) is running in asymmetrical situations with one or more of its stator phases open circuited. Moreover, the conventional coordinate transformation can not fulfill the decoupling control of DTP PMSM. To tackle these problems, we build the unified model of DTP PMSM in all kinds of open phase fault conditions in the d-q coordinate, and...
Brushless doubly fed induction generator (BDFIG) is promising for off-shore wind turbine application because of the high reliability without brush and slip ring. Because of the special structure of two isolated stator windings of different pole number and complex rotor configuration, the analysis of BDFIG is different from a conventional induction machine. The conductor distribution function is adopted...
In this paper, the direct adaptive fuzzy robust control is applied to the attitude stabilization control of the satellite, and the detailed design procedure of the fuzzy control system is presented. The controller directly acting on the controlled system doesn't require the modeling of the uncertain nonlinear system. The direct adaptive fuzzy controller is designed for the satellite, and the robust...
An improved vector control scheme for an energy feedback power dynamometer is proposed in this paper. The power dynamometer can be operated in both motoring and generating states. In generating mode the dynamometer can feedback the energy with unit power factor. In order to improve the dynamic response, improved vector control scheme is introduced. The torque control method is adopted in the outer-loop...
This paper presents a scientific strategy for cycling induced by the functional electrical stimulation. In order to simulate the FES-cycling movement produced by human body, a neuro-musculo-skeletal model containing 16 segments and 186 muscles is developed, which can simulate human movements precisely. This model contains mathematical model of electrically stimulated skeletal muscles. Having known...
Large transient grid voltage unbalance will result in deterioration of the doubly-fed induction generators(DFIGs) by introducing over current of rotor side converter(RSC) and double frequency oscillation in dc link voltage and electromagnetic torque. The rotor current controller with the conventional reduced DFIG model, which does not take into account the stator flux transients, could not obtain...
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