Results 241 to 250 of about 2,512,942 (294)

A multipurpose power supply for constant current, constant voltage, and constant power applications

Review of Scientific Instruments, 2021
Constant current (CC), constant voltage (CV), and constant power (CP) find numerous applications in different stages of the power supply chain and are often a part of various industrial and commercial needs. Although several conventional power supplies are available in the market to provide CC, CV, and CP, their outputs are specific and limited to one ...
Geethanjali Pandeswara   +2 more
openaire   +2 more sources

Modeling of a constant Voltage transformer

IEEE Transactions on Circuits and Systems I: Regular Papers, 2006
This paper presents a comprehensive nonlinear model of the controlled constant voltage transformer also known as the ferroresonant transformer. Saturation is a normal mode of operation for this device. This paper derives an equivalent electrical circuit that relates to the physical structure of a typical design.
Magnus G. J. Lind   +2 more
openaire   +2 more sources

Supercapacitor ageing at constant temperature and constant voltage and thermal shock

Microelectronics Reliability, 2010
This paper presents supercapacitor ageing according to the voltage, the temperature and thermal shock tests. To investigate this effect, a test bench of accelerated supercapacitor calendar ageing was carried out. Experimental tests are realized at constant temperature when the supercapacitors are polarized at the maximum voltage.
Hamid Gualous   +6 more
openaire   +4 more sources

A low voltage CMOS constant current-voltage reference circuit

2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512), 2004
The proposed CMOS current-voltage reference circuit consists of a traditional bandgap circuit based on the use of PMOS transistors in weak inversion. Its current is stabilized by an on-chip resistor with positive temperature coefficient. The voltage reference is produced by compensating the positive temperature coefficient of a resistor by the negative
Ilkka Nissinen, Juha Kostamovaara
openaire   +2 more sources

Constant voltage ultracapacitor

Journal of Renewable and Sustainable Energy, 2012
Ultracapacitors have attracted lots of attention recently due to their growing use in hybrid vehicles and in energy storage applications for the smart grid. A very undesirable feature of ultracapacitors is the fact that the voltage drops as the capacitor is discharged.
openaire   +1 more source

SQUID Operation at a Constant Voltage

IEEE Transactions on Applied Superconductivity, 2007
We have studied the operation of a superconducting quantum interference device (SQUID) at a constant voltage. A SQUID was coupled directly to the low noise preamplifier without any flux modulation. The deviation of the SQUID voltage from the reference voltage is amplified and produces a feedback current into the SQUID. We evaluated a flux change in the
Mizushi Matsuda   +2 more
openaire   +1 more source

A constant-voltage battery charger

Transactions of the American Institute of Electrical Engineers, Part II: Applications and Industry, 1960
THE USE OF BATTERIES in control centers, such as are found in sub- and central stations, is well established. With this application goes the need for a battery charger which will maintain the battery in a fully charged state. It must also carry any fixed load and be capable of recharging the battery when required by battery and circuit conditions.
C. H. Leet, W. Zug
openaire   +1 more source

Constant voltage electromigration testing

2011 IEEE International Integrated Reliability Workshop Final Report, 2011
Constant voltage electromigration was investigated as a method for assessing reliability in narrow Cu conductors. It is demonstrated theoretically that constant voltage (CV) testing can offer advantages over constant current (CC) testing for material that may vary significantly in geometry (thickness or line width) from sample to sample.
J. R. Lloyd   +3 more
openaire   +1 more source

Constant-reflector-voltage klystron

Proceedings of the IEE - Part B: Radio and Electronic Engineering, 1958
A theoretical analysis has been attempted on reflex klystrons which operate over a wide range of frequencies at a constant reflector voltage. As a result of experiments on some experimental tubes for the 4 and 7Gc/s bands, it was confirmed that the theoretical results obtained were in good agreement with the experiments.
openaire   +1 more source

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