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The ZVS-PWM commutation cell applied to the DC-AC converter
(1997-12-01)
This paper presents the analysis of a dc-ac converter using a zero-voltage-switching (ZVS) commutation cell. First, we show the cell applied to the buck converter. The stages of operation are presented along with the main ...
Performance improvement of soft-switched PWM rectifiers with inductive load
(Ieee-inst Electrical Electronics Engineers IncNew York, 1997)
Novel zero-current-switching PWM converters
(Institute of Electrical and Electronics Engineers (IEEE), 1997-06-01)
This paper presents a new family of pulsewidth-modulated (PWM) converters, featuring soft commutation of the semiconductors at zero current (ZC) in the transistors and zero voltage (ZV) in the rectifiers, Besides operating ...
Novel high-power-factor ZCS-PWM preregulators
(Institute of Electrical and Electronics Engineers (IEEE), 2001-04-01)
This paper introduces novel zero-current-switching (ZCS) pulsewidth-modulated (PWM) preregulators based on a new soft-commutation cell, suitable for insulated gate bipolar transistor applications. The active switches in ...
Inward-Inclined Implant Platform for the Amplified Platform-Switching Concept: 18-Month Follow-up Report of a Prospective Randomized Matched-Pair Controlled Trial
(QUINTESSENCE PUBLISHING CO INCHANOVER PARK, 2012)
Purpose: This prospective randomized matched-pair controlled trial aimed to evaluate marginal bone levels and soft tissue alterations at implants restored according to the platform-switching concept with a new inward-inclined ...
Lithium disilicate crown, zirconia hybrid abutment and platform switching to improve the esthetics in anterior region: A case report
(2020-01-01)
The hybrid abutment emerged as an alternative to maintain a stable and favorable volume of peri-implant tissue; it is composed of a mesostructure in ceramic and a metallic connection, which can be machined according to the ...
Resistance switching and formation of a conductive bridge in metal/binary oxide/metal structure for memory devices
(Japan Society Applied Physics, 2008-12)
The resistance switching mechanism of a metal/CuO/metal sandwich with a planar device structure has been studied. We report the direct observation of a conducting bridge within the CuO channel of the device, which is formed ...
Effect of mismatching abutments on implants with wider platforms - an experimental study in dogs
(Wiley-Blackwell, 2012-03-01)
Aim: To evaluate the effect of mismatching abutments on implants with a wider platform on the peri-implant hard tissue remodeling and the soft tissue dimensions.Material and methods: Mandibular premolars and first molars ...
A new family of zero-current-switching PWM converters and a novel HPF-ZCS-PWM boost rectifier
(Institute of Electrical and Electronics Engineers (IEEE), 1999-01-01)
A new family of direct current (DC) to DC converters based on a zero current switching pulse width modulated (ZCS-PWM) soft commutation cell is presented. This ZCS-PWM cell is consists of two transistors, two diodes, two ...
A novel single-phase ZCS-PWM high-power-factor boost rectifier
(Institute of Electrical and Electronics Engineers (IEEE), 1999-07-01)
This paper presents a novel single-phase high-power-factor (HPF) pulsewidth-modulated (PWM) boost rectifier featuring soft commutation of the active switches at zero current (ZC), It incorporates the most desirable properties ...