Variable speed, permanent magnet synchronous machines with hybrid excitation have attracted much attention due to their flux-control potential. In this paper, a design of axial flux iron poles in the rotor and an additional electrically controlled source fixed on stator is presented. This paper shows results pertaining air-gap control, electromagnetic losses, torque, back emf efficiency maps ob...

The hybrid excitation flux switching permanent magnet (HEFSPM) motor with magneticbridge is a topology of flux-switching PM machines. Despite its excellent performancesuch as high torque/ power density, enhancing/ weakening capability and so on, it has receivedless attention due to complicated structure. Therefore, optimal design performance all need tobe further investigated. This paper presen...

The response of atmospheric heat transport to anthropogenic warming is determined by the anomalous meridional energy gradient. Feedback analysis offers a characterization of that gradient and hence reveals how uncertainty in physical processes may translate into uncertainty in the circulation response. However, individual feedbacks do not act in isolation. Anomalies associated with one feedback...

We present a pilot study of the X-ray properties of intermediate-mass (∼ 105 − 106 M⊙) black holes in active galaxies using the Chandra X-ray telescope. Eight of the 10 active galaxies are detected with a significance of at least 3σ, with X-ray luminosities in the range L0.5−2keV ≈ 1041 − 1043 ergs s−1. The optical-to-X-ray flux ratios are consistent with expectations, given the known correlati...

An ensemble of idealized experiments with the simplified general circulation model PUMA is used to analyze response reduced surface friction, that a strengthening eddy-driven jet, weakening Eulerian mean overturning, and suppression baroclinic instability. The instability caused by an effect called barotropic governor which increased horizontal shear restricts ability disturbances convert avail...

The imaging atmospheric Čerenkov technique has been successfully used for observations of the Crab Nebula in the TeV energy range. However the Crab Nebula energy spectra, measured by several groups, still differ noticeably in power-law index as well as in absolute -ray flux. The HEGRA stereoscopic system of 5 imaging atmospheric Čerenkov telescopes has been used for long-term observations of th...