To judge whether the memristor can be interpreted as the fourth fundamental circuit element, we propose a variable-relation criterion of fundamental circuit elements. According to the criterion, we investigate the nature of three fundamental circuit elements and the memristor. From the perspective of variables relation, the memristor builds a direct relation between the voltage across it and th...

Introduction. The operation of switched reluctance motor requires prior knowledge the rotor position, obtaining from either low resolution photocoupler based position sensor or high shaft encoder, to control on/off states power switches. Problem. However, using physical in harsh environment will inevitably reduce reliability drive, which sensorless comes into play. Novelty. In this paper, a sch...

To judge whether the memristor can be interpreted as the fourth fundamental circuit element, we propose a variable-relation criterion of fundamental circuit elements. According to the criterion, we investigate the nature of three fundamental circuit elements and the memristor. From the perspective of variables relation, the memristor builds a direct relation between the voltage across it and th...

This paper proposes an advanced flux-weakening control method to enlarge the speed range of interior permanent magnet synchronous motor (IPMSM). In deep flux weakening (FW) region, linkage decreases as increases, increasing instability. Classic methods will be unstable when operating in this area changing load torque or reference is required. The a hybrid eliminate instability caused by voltage...

This paper deals with a current sensor fault reconstruction algorithm for the torque closed-loop drive system of an interior PMSM. First, sensor faults are equated to actuator ones by a new introduced state variable. Then, in αβ coordinates, based on the motor model with active flux linkage, a current observer is constructed with a specific sliding mode equivalent control methodology to elimina...

High-frequency soil CO(2) flux data are valuable for providing new insights into the processes of soil CO(2) production. A record of hourly soil CO(2) fluxes from a semi-arid ponderosa pine stand was spatially and temporally deconstructed in attempts to determine if variation could be explained by logical drivers using (i) CO(2) production depths, (ii) relationships and lags between fluxes and ...

The ratio of torque to copper loss can be increased by injecting third-harmonic current into five-phase permanent-magnetic synchronous motor (PMSM). Accurate flux linkage information is indispensable in the process calculating reference corresponding maximum torque/copper ratio. In harsh working environments, will deviate from initial measured value, resulting deviation between and point. There...

This paper proposes a novel hybrid-type permanent magnet motor (HPMM) that simultaneously applies ferrite-PM (Fe-PM) to reduce the amount of NdFeB (Nd-PM) used in electric vehicle traction motors. Conventional HPMM can be divided into parallel type (P-HPMM) and series (S-HPMM). P-HPMM is advantageous for PM torque improvement because it obtain high flux linkage, but there problem Fe-PM demagnet...