XIX Sympozjum Srodowiskowe PTZE - materialy.pdf
XIX Sympozjum Srodowiskowe PTZE - materialy.pdf XIX Sympozjum Srodowiskowe PTZE - materialy.pdf
XIX Sympozjum PTZE, Worliny 2009 • A brainstem auditory evoked potential (BAEP) test looks at the pathway from the ear to the part of brain that interprets sound. • A somatosensory evoked potential (SEP) test looks at the pathway from the peripheral nerves in the arms and legs to the sensory part of the brain. Patric Suppes and his research group (1997-99) conducted research on brain-wave (VEP&BAEP) recognition of words, simple sentences and images. Statistical analysis of evoked signal FFT, filters, inverse- FFT and least-square analysis shows that evoked brain signals can be recognized and related to a proper denotation. The Schumann resonances (SR) are a set of spectrum peaks in the extremely low frequency (ELF) region of the Earth's electromagnetic field spectrum. Schumann resonances are global electromagnetic resonances, excited by lightning discharges in the cavity formed by the Earth surface and the ionosphere. The resonances are the principal background in the electromagnetic spectrum between 3-69 Hz, and appear as distinct peaks at extremely low frequencies (ELF) around 7.83, 14.3, 20.8, 27.3 and 33,8 Hz. Effects on Schumann resonances have been reported following geomagnetic and ionospheric disturbances. More recently, discrete Schumann resonance excitations have been linked to transient luminous events – sprites, elves, jets, and other upper-atmospheric lightning. A new field of interest using Schumann resonances is related to short-term earthquake prediction. Interest in Schumann resonances extends beyond the domain of geophysics where it initially began, to the fields of medicine, art and music, and to bioenergetics, acupuncture, and psychobiology. The ideas are highly controversial. The first documented observations of what were speculated to be global electromagnetic resonances were made by Nikola Tesla in 1905 and formed the basis for his scheme for wireless energy transmission. 168
XIX Sympozjum PTZE, Worliny 2009 WINDING DESIGN OF CORELESS STATOR AXIAL FLUX PERMANENT MAGNET SYNCHRONOUS MACHINES Peter Virtič 1 , Peter Pišek 1 , Bojan Štumberger 2,1 , Miralem Hadžiselimović 2,1 , Tine Marčič 1 , Zdravko Praunseis 2 1 TECES, Pobreška cesta 20, SI-2000 Maribor, Slovenia, e-mail: peter.virtic@teces.si 2 University of Maribor, Faculty of Energy Technology, Hočevarjev trg 1, SI-8270 Krško, Slovenia, Faculty of Electrical Engineering and Computer Science, Smetanova ulica 17, SI-2000 Maribor, Slovenia, e-mail: bojan.stumberger@uni-mb.si Introduction Axial flux permanent magnet synchronous machines (AFPMSMs) which are also called disc machines, in many cases replace their radial flux cylindrical shaped counterparts. Disc-shaped AFPMSMs can be built into the applications, where conventional machines cannot be applied due to the lack of space in the axial direction. With the appropriate design including housing adjusted to particular application the AFPMSM can reach very high power density and compact construction. In contrast to radial flux machine the AFPMSMs can be designed as single or double sided, with double external stator or rotor and single or multiple stators and rotors on the same shaft. Internal stator of double sided AFPMSM can be designed with iron core or entirely without the iron. In this paper the double sided AFPMSM topology with coreless stator is presented (Fig. 1) and the influence of two winding designs (Fig. 2) on static characteristics of coreless stator AFPMSM are investigated. The characteristics of AFPMSM have been calculated by using analytical method via magnetic vector potential and verified by finite element method (FEM) and measurements. The verification with FEM and measurements will be presented in full version of this paper. Fig. 1. Topology of double sided coreless stator AFPMSM. As distinguished from the AFPMSM with stator iron the torque of coreless stator AFPMSM depends mainly on the amount of copper in AFPMSM. Moreover, the AFPMSM 169
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<strong>XIX</strong> <strong>Sympozjum</strong> <strong>PTZE</strong>, Worliny 2009<br />
• A brainstem auditory evoked potential (BAEP) test looks at the pathway from the<br />
ear to the part of brain that interprets sound.<br />
• A somatosensory evoked potential (SEP) test looks at the pathway from the<br />
peripheral nerves in the arms and legs to the sensory part of the brain.<br />
Patric Suppes and his research group (1997-99) conducted research on brain-wave<br />
(VEP&BAEP) recognition of words, simple sentences and images. Statistical analysis of<br />
evoked signal FFT, filters, inverse- FFT and least-square analysis shows that evoked brain<br />
signals can be recognized and related to a proper denotation.<br />
The Schumann resonances (SR) are a set of spectrum peaks in the extremely low frequency<br />
(ELF) region of the Earth's electromagnetic field spectrum. Schumann resonances are global<br />
electromagnetic resonances, excited by lightning discharges in the cavity formed by the Earth<br />
surface and the ionosphere. The resonances are the principal background in the<br />
electromagnetic spectrum between 3-69 Hz, and appear as distinct peaks at extremely low<br />
frequencies (ELF) around 7.83, 14.3, 20.8, 27.3 and 33,8 Hz.<br />
Effects on Schumann resonances have been reported following geomagnetic and ionospheric<br />
disturbances. More recently, discrete Schumann resonance excitations have been linked to<br />
transient luminous events – sprites, elves, jets, and other upper-atmospheric lightning. A new<br />
field of interest using Schumann resonances is related to short-term earthquake prediction.<br />
Interest in Schumann resonances extends beyond the domain of geophysics where it initially<br />
began, to the fields of medicine, art and music, and to bioenergetics, acupuncture, and<br />
psychobiology. The ideas are highly controversial. The first documented observations of what<br />
were speculated to be global electromagnetic resonances were made by Nikola Tesla in 1905<br />
and formed the basis for his scheme for wireless energy transmission.<br />
168
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