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Appearance of Symmetry Breaking in AC/AC Converters and Its Recovery Methods

Appearance of Symmetry Breaking in AC/AC Converters and Its Recovery Methods
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Complete Bounding Method for AC Contingency Screening

IEEE Power Engineering Review, 1989
The analysis of the effects of hundreds of outages on line flows and bus voltages is required for the real-time security analysis and contingency enumeration. This increases the demands on the speed, accuracy and adaptability of the solution methods.
V. Brandwajn, M.G. Lauby
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A New Harmonic Analysis Method for AC/DC/AC Converters

2008 Workshop on Power Electronics and Intelligent Transportation System, 2008
A new direct harmonic analysis approach for AC/DC/AC conversion system is presented and discussed. It uses the characteristic of the vectors and their sequence characteristic to obtain the voltage and current transfer rules of the converters in conversion system, and then get the direct harmonic analysis method of the whole AC/DC/AC.
Li Xia, Zhaorui Lv, Zhengguo Wu
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Slope approximation control method in the AC/AC converter control

Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04., 2004
Cosine-intersect method is adopted widely in the control of digital AC/AC converter, But for the sinusoidal current AC/AC converter, there are some defects in the cosine-intersect method. The slope approximation control method, as a new control method, which calculates and controls the load current directly, can improve the qualities of output current,
null Qiang Zhang, null Jibin Zou, null Weiyan Liang   +2 more
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Four-quadrant AC-AC converter applied by integrated-voltage-control method

PESC 98 Record. 29th Annual IEEE Power Electronics Specialists Conference (Cat. No.98CH36196), 2002
Authors propose the four-quadrant AC-AC converter applying the integrated-voltage-control method. This AC-AC converter outputs variable single-phase AC voltage like a variable ratio transformer. It has been confirmed that this AC-AC converter can drive all types of load for example an R-L load or an R-C load and has no error between the average output ...
H. Okui, H. Irie
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Method and apparatus for AC electrospray

2023
The present invention provides an electrospray device using a high frequency alternating current (AC) above 10 kHz to generate fine micron sized drops. The apparatus generally functions by applying a high frequency alternating current electric field across one or more micro-needles and one or more conducting elements.
Lastochkin, Dmitri, Chang, Hsueh-Chia, Yeo, Leslie, Wang, Shau-Chun Paul, Gagnon, Zachary   +4 more
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AC/DC transfer method for an AC magnetic flux density standard

Measurement Science and Technology, 2005
Several methods for assuring a reference alternating (AC) magnetic field (densities up to few mT and frequencies up to 10 kHz) inside an air-cored coil are currently used (inductive pick-up coils, Hall magnetometer, fluxgate magnetometer). But irrespective of the method used, the measuring uncertainty of the reference AC magnetic field standard is ...
Janez Humar, Dušan Fefer, Gregor Geršak   +2 more
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