Results 211 to 220 of about 727 (249)

New sinusoidal pulsewidth-modulated invertor

Proceedings of the Institution of Electrical Engineers, 1975
Sinusoidal p.w.m. invertors depend intrinsically for their operation on quite complex modulation processes. An in-depth study of these modulation processes is presented and the sources of possible operational problems are identified. These problems are shown to be manifest in low-frequency harmonic distortion and the possible existence of subharmonics ...
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Bioprosthetic valve holder and strut invertor

Indian Journal of Thoracic and Cardiovascular Surgery, 1992
A simple and inexpensive method of holding and inverting the strut of a bioprosthetic valve is described.
Ajay Kaul, Yasmin Wadia, A. P. Chaukar
openaire   +1 more source

Static-invertor power supplies

Electronics and Power, 1975
Applications for static-invertor power supplies can range from simple emergency-lighting systems to the more ‘complex needs of a computer system or process-control equipment. But behind each application is the question: ‘Is it cost-effective?’
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Dip behaviour of grid connected invertors

22nd International Conference and Exhibition on Electricity Distribution (CIRED 2013), 2013
The environmental awareness has led to a considerably increasing demand for renewable energy. The majority of renewable energy installations consist of invertor fed systems. In the distribution network, many common power quality phenomena voltage dips, under- and overvoltage, transients, unbalance and harmonic distortion) occur and they affect the ...
B. Verhelst, C. Debruyne, K. Stockman, J. Desmet   +3 more
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The invertor knock-in conditional chromosomal translocation mimic

Nature Methods, 2004
Knock-in models of tumor-specific chromosomal translocations can generate lethal mutations. To circumvent this, a new conditional gene fusion model has been developed (invertor mice) and exemplified with the Ews-ERG fusion oncogene. An ERG segment, flanked by loxP sites, was knocked in to an intron of the Ews gene but in an inverted transcription ...
Alan, Forster, Richard, Pannell, Lesley F, Drynan, Rosalind, Codrington, Angelika, Daser, Markus, Metzler, M Natividad, Lobato, Terence H, Rabbitts   +7 more
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Static invertors—recent developments and new applications

Electronics and Power, 1968
The advent of the transistor and, more recently, the thyristor has created wide interest in circuit designs and techniques for static invertors, with their advantages over conventional rotating machines. The increasing interest in fields of application such as fluorescent lighting and electric vehicles is accelerating their design and development for ...
K.W.J. Bishop, R.J. Spreadbury
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New 3-phase invertor circuit

Proceedings of the Institution of Electrical Engineers, 1968
A 3-phase variable-frequency invertor is described. It is capable of controlling the output voltages by an on-off method. The commutation circuit is simple, and is so arranged that the invertor output voltages are independent of the load conditions. The triggering circuit and a protection scheme are also described.
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Invertor drives for induction motors

Students Quarterly Journal, 1972
Induction motors have many advantages for industrial use, but the only simple and efficient way of controlling their speed is by using static invertors to supply them with variable-frequency, variable-voltage a.c.
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Adjustable frequency invertors and their application to variable-speed drives

Electronics and Power, 1964
The paper with the above title is published in this month in the Proceedings. It will be read at a meeting of the Power Division on the 17th November at Savoy Place. Separate copies of individual papers are available, free of charge if called for at Savoy Place before the meeting, or 2s. by post.
D.A. Bradley, C.D. Clarke, R.M. Davis, D.A. Jones   +3 more
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Characterization of GaN Switches for Solar Invertors

ECS Transactions, 2014
To improve the efficiency of a solar cell application, two areas of focus are necessary. The first is to improve the quality of the solar panels; and the second is to increase the inverter efficiency, which can be accomplished by using high frequency switches with low on-state and switching losses. GaN has a significantly bigger bandgap compared to Si
Tanya Gachovska, Nikolay Radimov, Chris Gerolami, Ray Orr, Jerry L Hudgins, Krishna Shenai   +5 more
openaire   +1 more source