Results 201 to 210 of about 934,727 (249)
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Science, 2013
Physics Many components of modern devices are based on magnetic effects; magnetic read heads, for example, use the phenomenon known as exchange bias, in which two materials that order magnetically are interfaced, causing the magnetic properties of the ferromagnetic layer (in which spins align parallel to each other) to be affected by the ...
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Physics Many components of modern devices are based on magnetic effects; magnetic read heads, for example, use the phenomenon known as exchange bias, in which two materials that order magnetically are interfaced, causing the magnetic properties of the ferromagnetic layer (in which spins align parallel to each other) to be affected by the ...
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Review of Scientific Instruments, 1968
A voltage controlled 50 Ω attenuator using photoresistors, variable over a range of 1.5 to 10 dB with a 0 to 10 V control voltage, is described. Useful frequency response is dc to 300 MHz, corresponding to a rise time of approximately 1 nsec. The programming speed is limited by the response of an incandescent bulb. The device can handle inputs of up to
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A voltage controlled 50 Ω attenuator using photoresistors, variable over a range of 1.5 to 10 dB with a 0 to 10 V control voltage, is described. Useful frequency response is dc to 300 MHz, corresponding to a rise time of approximately 1 nsec. The programming speed is limited by the response of an incandescent bulb. The device can handle inputs of up to
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A voltage‐controlled resistor for a linear voltage‐controlled oscillator
Electronics and Communications in Japan (Part II: Electronics), 1996AbstractTo realize a linear voltage‐controlled oscillator (VCO), a voltage‐controlled resistor (VCR) whose reciprocal resistance is linear with respect to the control voltage Vcwas fabricated and tested. The VCR was composed of an analog multiplier (AM) and an operational amplifier (OA). The. static effective resistanceReof the VCR varied asR−1e=R−1(1 +
Masahiro Teramura +3 more
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Interaction among voltage controlling devices and voltage control effect identification
Proceedings of 2010 IEEE International Symposium on Circuits and Systems, 2010This paper presents a method to verify the adequacy of voltage control actions in the operation of electrical systems. The assessment is done through a sensitivity matrix, whose characteristics are presented and discussed. The goal is to identify whether the usual logic of voltage controlling equipment is occurring normally or not.
R. B. Prada, L.J. Souza
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Secondary voltage control of power grid using voltage stability index and voltage control areas
2017 North American Power Symposium (NAPS), 2017This paper presents secondary voltage control of power grid using identification of voltage stability index and voltage control areas. Unlike, the traditional secondary voltage control in North America performed directly by switching capacitor banks and other reactive power sources, in the proposed approach generators are chosen first to perform ...
Rabindra Maharjan, Sukumar Kamalasadan
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Voltage Regulation and Load Control
Transactions of the American Institute of Electrical Engineers, 1934Some of the problems involved in supplying electric power to the business sections of large metropolitan areas are dealt with in this article which describes the development and operation of new methods of voltage regulation and load control by means of which improved conditions are being obtained on the distribution system in New York City.
H. C. Forbes, H. R. Searing
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Electrical Engineering, 1950
WHEN THE submerged melt welding process was first introduced 15 years ago, one of its most attractive features was the extremely large welding currents that could be used for making heavy welds in one pass. At that time there were a number of automatic welding machines available for arc welding with bare-wire or coated electrode. None of these machines,
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WHEN THE submerged melt welding process was first introduced 15 years ago, one of its most attractive features was the extremely large welding currents that could be used for making heavy welds in one pass. At that time there were a number of automatic welding machines available for arc welding with bare-wire or coated electrode. None of these machines,
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Voltage Control of Vapor Rectifiers
Transactions of the American Institute of Electrical Engineers, 1934Some of the changes to be introduced into the mathematical treatment of rectifier circuits when the fring of the anodes of a rectifier is advanced or retarded by control of the arc are described. The points considered and illustrated by theoretical curves include commutation between anodes, regulation, and wave shape of the output voltage for the more ...
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Distribution Feeder Voltage Regulation Control
IEEE Transactions on Industry Applications, 2009Step voltage regulators are the work horse of distribution feeders for maintaining the voltage at every customer's meter to be within the ANSI standards. A step voltage regulator can be viewed as a tap changing autotransformer. This paper will apply a model of the step voltage regulator. The IEEE 13 Node Test Feeders will be used to demonstrate how the
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Computer controlled voltage clamp
Medical & Biological Engineering & Computing, 1983V, Demjanenko, F, Sachs
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