Proceedings ArticleDOI
An improved active front end non-regenerative rectifier system employing a five-limb inductor
Mahesh Swamy,Steven Schifko +1 more
- pp 1241-1248
TLDR
In this paper, a three-phase current injecting inductor, required in the topology, is constructed in a five limb fashion and is shown to be helpful in limiting non characteristic harmonics.Abstract:
Variable frequency drives (VFDs) draw discontinuous current from the power system resulting in current distortion and consequently voltage distortion. Limiting current distortion to levels recommended in IEEE 519-1992 improves system efficiency, increases reliability, and limits voltage distortion that can adversely influence sensitive loads. This paper revisits a non regenerative active front end system that has been studied in the past but offers significant improvements to make it acceptable to the drives industry. A three-phase current injecting inductor, required in the topology, is constructed in a five limb fashion and is shown to be helpful in limiting non characteristic harmonics. Since the current injected into the split dc bus capacitor is a 360Hz ripple, it is proposed that the main dc bus capacitor be split into film capacitor for ripple current and optimally reduced electrolytic capacitor for the main energy storage requirements. Experimental results are given based on the suggested improvement and low distortion levels that were not achieved in the past have been shown to be attainable. Comparison between a standard three-limb inductor and a five-limb inductor is made to highlight the performance improvements achievable. Adoption of the topology for common dc bus applications is also proposed.read more
Citations
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Journal ArticleDOI
Investigating a conventional and retrofit power plant on-board a Roll-on/Roll-off cargo ship from a sustainability perspective – A life cycle assessment case study
TL;DR: In this article, the authors examined the environmental performance of retrofit power plant solutions incorporating emerging technologies using an integrated system approach based on Life Cycle Assessment and concluded that the environmental burden caused by a marine power plant was significant but retrofitting existing power plant with suitable emerging technologies could reduce a number of impacts by 4-7 orders of magnitude, as verified via scenario analysis.
Proceedings ArticleDOI
An improved single-phase active front end rectifier system for use with three-phase variable frequency drives
TL;DR: In this article, a low-cost single-phase active circuit based on injecting current into the mid-point of the DC bus employing only one bidirectional switch is proposed, which carries current for less than a quarter cycle and is rated accordingly.
Journal ArticleDOI
An Improved Single-Phase Active-Front-End Rectifier System for Use With Three-Phase Variable-Frequency Drives
TL;DR: In this article, a low-cost single-phase active circuit based on injecting current into the midpoint of the dc bus employing only one bidirectional switch is proposed, which carries current for less than a quarter cycle and is rated accordingly.
Dissertation
Modeling and operation of hybrid ferry with gas engine, synchronous machine and battery
TL;DR: An opportunity to reduce the SEC of the operation is to develop a control system for connecting and disconnecting generators sets, which makes the generator sets operate at a more optimal loading rate.
References
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Proceedings ArticleDOI
Design and experimental investigation of a three-phase high power density high efficiency unity power factor PWM (VIENNA) rectifier employing a novel integrated power semiconductor module
TL;DR: In this paper, the authors developed guidelines for the practical application of a new power module (IXYS VUM25-E) realizing a bridge leg of a three-phase/switch/level PWM (VIENNA) rectifier system with low effects on the mains.
Journal ArticleDOI
An improved high-power factor and low-cost three-phase rectifier
E.L.M. Mehl,Ivo Barbi +1 more
TL;DR: In this paper, a new method to improve the power factor of three-phase rectifiers is introduced, which is achieved with three bi-directional active switches rated at a small fraction of the total processed power, and gated at the line frequency.
Proceedings ArticleDOI
An improved high power factor and low cost three-phase rectifier
E.L.M. Mehl,Ivo Barbi +1 more
TL;DR: In this paper, a new method to improve the power factor of three-phase rectifiers is introduced, which is achieved with three bidirectional active switches rated at a small fraction of the total processed power, and gated at the line frequency.
Journal ArticleDOI
A novel unity power factor input stage for AC drive application
Ali I. Maswood,Fangrui Liu +1 more
TL;DR: In this paper, a new method of improving the input current total harmonic distortion (THD) as well as power factor of a three-phase suppressed-link rectifier-inverter is presented.
Patent
Three Phase Active Rectifier System
TL;DR: In this article, an active filter circuit comprises a pair of filter capacitors in series across the first and second rails to create a midpoint, and an active switch controller controls a conduction angle of the bidirectional switches to maintain DC bus voltage at a desired reference level under a wide load range.