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- 저자 : T.Furuno (검색결과 3 건)
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SINGLE PHASE PWM INVERTER WITH CURRENT MINOR CONTROL LOOP
Y.Shikano,T.Kawabata,T.Furuno,K.Honjo,N.Sashida,Y.Yamamoto 전력전자학회 1989 ICPE(ISPE)논문집 Vol.- No.-
This paper proposes a single phase sinusoidal voltage inverter with current minor loop using high speed switching devices such as Bi-MOS or IGBT.<br/> Following new methods are successfully combined and adopted to get high performance:<br/> (a) A high speed current minor control loop is given for the Inverter to constrain inverter current within SOA of switching devices, and as the reference of this current loop, following signals are given to get sinusoidal output voltage.<br/> (1) Current for the parallel element of the<br/> output filter<br/> (ii) Feedforward of the load current (iii) Voltage adjusting and stabilizing signal which is the output of voltage controller<br/> (b) Micro processor control using the dead beat algorithm is developed for sinusoidal output voltage Inverter. This system consists of two dead beat controllers for current and voltage. By using the dead beat control, the inverter current and the output voltage settle with one sampling period.
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Chang-Bum Moon,K Furuno,T Komatsubara 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.43 No.I
The excited states of the $^{115}$I nucleus have been studied by using in-beam $\gamma$-ray spectroscopy with the $^{89}$Y ($^{29}$Si, 3n) $^{115}$I reaction at a beam energy of 108 MeV. The level scheme of $^{115}$I was established by using $\gamma-\gamma$ coincidence and $\gamma-\gamma$ angular correlation analysis. In the present work, many collective bands built on the proton h$_{11/2}$, g$_{7/2}$, and d$_{5/2}$ were observed. Among them, an unfavored rotational band and a quasi-$\gamma$ band based on the $\pi$h$_{11/2}$ configuration was newly identified. A well-developed rotational band built on the 7/2$^+$ level was established up to I$^{\pi}$ = 47/2$^+$. This positive-collective band could be interpreted as coming from the $\pi$g$_{7/2}$ configuration at low spins. At higher spins above I$^{\pi}$ = 23/2$^+$, that band was found to be associated with the aligned three-quasiparticle configuration built on a proton in the g$_{7/2}$ orbital coupled to a pair of neutrons in the h$_{11/2}$ orbital.
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Signature Anomaly in the Yrare Band of 119Xe
C.-B.Moon,S.J.Chae,J.H.Ha,T.Komatsubara,Y.Sasaki,T.Jumatsu,K.Yamada,K.Satou,K.Furuno 한국물리학회 2002 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.41 No.2
The excited states of the $^{119}$Xe nucleus have been studied by using in-beam $\gamma$-ray spectroscopy with the $^{107}$Ag ($^{16}$O, p3n) $^{119}$Xe fusion-evaporation reaction at a beam energy of 85 MeV. The level scheme of $^{119}$Xe has been derived from $\gamma$-$\gamma$ coincidence and $\gamma$-$\gamma$ angular correlation analyses. We have, for the first time, established the second negative-parity favored and unfavored states built on the 11/2$^-$ state, namely the yrare rotational bands in $^{119}$Xe. In contrast to the behavior of the yrast bands where the favored states are lying lower in energy, the yrare favored states were observed to lie above the unfavored band. Such a signature inversion becomes normal at $I$=12 $\hbar$, which is the first observation of critical inversion-spin in an odd-mass Xe. We suggest that the signature inversion might be associated with a shape coexistence in terms of the $\gamma$ deformations between the favored and the unfavored yrare bands based on the coupling of the favored $h_{11/2}$ neutron with the even- and the odd-spin members of the $\gamma$ bands in even-even neighbors.
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