Results 161 to 170 of about 820,288 (203)

Low-loss self-switching bandstop filter

2016 46th European Microwave Conference (EuMC), 2016
A new switchable low-loss bandstop filter is presented based on an indirect switching method combined with all-pass coupled lines. The proposed design allows switching between an all-pass mode and a bandstop filter mode for On/Off operation of a bandstop response.
Sanghoon Shin, Andrew C. Guyette, Eric J. Naglich   +2 more
openaire   +1 more source

Platform switching reduces peri-implant bone loss

The Journal of the American Dental Association, 2012
A critical summary of Atieh MA, Ibrahim HM, Atieh AH. Platform switching for marginal bone preservation around dental implants: a systematic review and meta-analysis. J Periodontol 2010;81(10):1350–1366.
openaire   +2 more sources

Energy loss in spark gap switches

Physics of Plasmas, 2014
The paper reports on numerical study of the energy loss in spark gap switches. The operation of the switches is analyzed using the Braginsky model which allows calculation of the time dependence of the spark channel resistance. The Braginsky equation is solved simultaneously with generator circuit equations for different load types.
V. I. Oreshkin, I. V. Lavrinovich
openaire   +1 more source

Estimation of switched reluctance motor losses

IEEE Transactions on Industry Applications, 1992
A method of predicting switched reluctance motor (SRM) losses under operating conditions inclusive of saturation is described. General expressions for the flux frequencies in different parts of the core are derived. Fourier analysis is applied to decompose the flux waveforms into their constituent sinusoidal components, which are then used in ...
P. Materu, R. Krishnan
openaire   +1 more source

Energy loss reduction by critical switches

IEEE Transactions on Power Delivery, 1993
A systematic method to derive an optimal switching plan to achieve energy loss minimization for short term and long term operation of distribution systems is presented. The short term optimal switching criterion is developed by binary integer programming with a branch and bound technique.
C.-S. Chen, M.-Y. Cho
openaire   +1 more source

Low loss 4x4 optical switching network

Electronics and Communications in Japan (Part I: Communications), 1980
AbstractA 4 × 4 optical switching network was realized which has a low insertion loss and good switching repeatability. Practical optical switching networks are in great demand for optical fiber communication and information processing systems of higher grade and more versatility.
Yohji Fujii, Jun‐Ichiro Minowa, Yoichi Nagatas, Tsutomu Aoyama, Kikuo Dois   +4 more
openaire   +1 more source

A low loss switching PWM CSI

PESC `92 Record. 23rd Annual IEEE Power Electronics Specialists Conference, 2003
A low-loss soft-switching CSI topology, consisting of two parallel switches with a midpoint connected capacitor, is proposed. The structure accomplishes zero voltage switching during turn-off without any additional snubber circuit. It is well suited for high power applications requiring the use of two parallel switches. An analysis and design procedure
L.D. Salazar, G. Joos, P.D. Ziogas
openaire   +1 more source

Single-stage single-switch input-current-shaping technique with reduced switching loss

IEEE Transactions on Power Electronics, 1999
In this paper, a new single-stage, single-switch input-current-shaping (S/sup 4/ICS) technique which features substantially reduced turn-on switching loss of the switch in a S/sup 4/ICS flyback topology is described. In the proposed technique, the turn-on switching loss due to the discharging of the output capacitance of the switch is reduced by ...
L. Huber, M.M. Jovanovic
openaire   +1 more source

Determination of switching losses in IGBTs by loss-summation-method

IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting, 2002
The exact determination of switching losses in power transistors is still an important problem. This paper treats investigations on switching losses in insulated gate bipolar transistors and assigned freewheeling diodes at hard switching commutation. Especially, a new technique, the loss summation method, is presented.
L. Abraham, M. Reddig
openaire   +1 more source

Switching losses of IGBTs under zero-voltage and zero-current switching

PESC Record. 27th Annual IEEE Power Electronics Specialists Conference, 2002
Turn-off switching losses of punch-through (PT) and nonpunch-through (NPT) IGBTs under hard switching (HS) and zero-voltage switching (ZVS) are presented and evaluated at 25/spl deg/C, 75/spl deg/C and 125/spl deg/C. A comparison between PT and NPT devices based on their internal device characteristics is given for HS and ZVS.
A. Elasser, M.J. Schutten, V. Vlatkovic, D.A. Torrey, M.H. Kheraluwala   +4 more
openaire   +1 more source