The paper present a novel idea of simulating a flux controller with a finite element solver embedded in the motor model for the bearingless operation of a synchronous reluctance motor. Since rotor anisotropy and strong magnetic saturation can be accurately modelled in the finite element solutions, simulating the controller with a finite element based feedback generating system gives the opportu...

Abstract Owing to the significant influence of El Niño-Southern Oscillation (ENSO) on global climate, how ENSO events are initiated is an intriguing issue. The North Pacific (NPO), a primary atmospheric variability over midlatitude, well-known trigger for events, but physical linkage not yet fully understood. Based observational analyses, in Part I, we proposed new mechanism that NPO-related wa...

This paper presents a direct flux and torque control (DTC) of three phase induction motor drive (IMD) using PI and fuzzy logic controllers (FLC) for speed regulator (SR) and low torque ripples. This control method is based on DTC operating principles. The DTC is one of the most excellent direct control strategies of stator flux and torque ripples of IMD. The key issue of the DTC is the strategy...

The design preciseness, the material used in productivity plus the time are coming the most important factors in motor manufacturing. Consequently, the use of interior permanent magnet synchronous machines (IPM) in hybrid vehicle seemed to be the best demands. However, and due to the earth magnet materials increasing prices such as Dysprosium and Neodymium, automobile manufacturers have looked ...

In 1971 a “missing memristor” was proposed by a circuit theorist named Leon Chua as a 4 fundamental passive circuit element defined by a non-linear relationship between electric charge and magnetic flux linkage. In 2008 a research group from Hewlett-Packard led by Stan Williams claimed credit for finding this “missing memristor” based on the observation of a zero-crossing hysteresis effect. I r...

This paper presents a direct torque control strategy for double star synchronous machine fed by two three-level inverters. The analysis of the torque and the stator flux linkage reference frame shows that the concept of direct torque control can be extended easily to double star synchronous machine. The proposed approach consists to replace the switching tables by one artificial neural networks...

Helicity, a measure of the linkage of flux lines, has subtle and largely unknown effects upon dynamics. Both magnetic and hydrodynamic helicity are conserved for ideal systems and could suppress nonlinear dynamics. What actually happens is not clear because in a fully three-dimensional system there are additional channels whereby intense, small-scale dynamics can occur. This contribution shows ...

In order to study the operation process of motor and improve operating performance motor, this paper performs finite element simulation three-phase asynchronous optimizes initial design by using Taguchi method. Firstly, a model is established with voltage, current, torque, flux linkage, distribution lines magnetic induction intensity under rated conditions vertified Finite Element Analysis (FEA...

Aiming at the problem that change of motor parameters in actual operation will significantly reduce control accuracy motor, this paper proposes a sensorless method permanent magnet synchronous based on an adaptive back-EMF observer. Firstly, vector algorithm, mathematical model coordinate axis transformation is established, online identification flux linkage, and back EMF observer constructed. ...

In this paper, a sliding mode control is presented for direct torque and stator flux of interior permanent magnet synchronous motor in rotor speed sensorless drive system. The scheme developed specific rotating reference frame (X-Y) which the current space vector coincides with (X) axis. For technique no need to have any knowledge machine parameters such as two-axis inductances, magnets linkage...