Surface permanent magnet vernier motors (SPMVMs) possess the potential for direct-drive applications due to feature of high torque density. This paper presents a deep investigation into armature reaction modeling and semi-analytical optimization framework considering constant power speed range (CPSR) in flux weakening region SPMVM. The new model can identify air gap density each harmonic compon...

Indirect field-oriented control (IFOC) of a linear induction motor (LIM) drive is an important challenge because the end effect and nonlinear behavior LIM drive. It becomes more complex in high-speed applications flux-weakening (FW) regions when current voltage constraints must be satisfied. Moreover, considering primary resistance constraint inequality makes calculations even complicated. This...

In electrolytic capacitorless permanent magnet synchronous motor (PMSM) drives, the DC-link voltage will fluctuate in a wide range due to use of slim film capacitor. When flux-weakening current is lower than $-\psi_{\mathrm{f}}/L_{\mathrm{d}}$ during high speed operation, control loop transform ...

It is shown that landscape variability decreases the temperature in the surface layer when, through mesoscale flow, cool air intrudes over warm patches, lifting warm air and weakening the static stability of the upper part of the planetary boundary layer. This mechanism generates regions of upward vertical motion and a sizable amount of available potential energy and can make the environment of...

Potentials and limits of the Hybrid-Excitation Permanent-Magnet (HEPM) synchronous machine are dealt with in this paper. A six-pole is taken into consideration, both parallel series configurations analysed compared. Taking advantage rotor excitation coils, permanent magnet (PM) flux can be adjusted according to operating speed improve its performance parameters. The electro-magnetic force first...

The variability and trend of volume advective heat flux, in addition to the net inflow outflow flux Java Sea for 64 years (1950–2013), along with its relationship monsoon, ENSO (El Niño Southern Oscillation), IOD (Indian Ocean Dipole), have all been studied. A simulation 3D hydrodynamic HYCOM (HYbrid Coordinate Model) a 1/8° grid resolution was performed this study. Judging from simulated resul...