scispace - formally typeset
Search or ask a question
Topic

Overcurrent

About: Overcurrent is a research topic. Over the lifetime, 17101 publications have been published within this topic receiving 105240 citations. The topic is also known as: excess current.


Papers
More filters
Patent
29 Sep 2006
TL;DR: In this article, a power tool motor is provided by pulse width modulation of current from a power supply, which may be varied according to the determined motor current and measured power supply voltage.
Abstract: Amperage control of a power tool motor is provided by pulse width modulation of current from a power supply. The pulse width modulation may be varied according to the determined motor current and measured power supply voltage. The power supply may include a battery such as lithium ion or nickel cadmium.

660 citations

Patent
04 Sep 2012
TL;DR: In this article, a surgical generator and related method for mitigating overcurrent conditions is provided, which includes a power supply, a radio frequency output stage, an overcurrent detection circuit in operative communication with an interrupt circuit, and a processor.
Abstract: A surgical generator and related method for mitigating overcurrent conditions are provided. The surgical generator includes a power supply, a radio frequency output stage, an overcurrent detection circuit in operative communication with an interrupt circuit, and a processor. The power supply generates a power signal and supplies the power signal to the radio frequency output stage. The radio frequency output stage generates a radio frequency signal from the power signal. The overcurrent detection circuit detects an overcurrent of the power signal and/or an overcurrent of the radio frequency signal. The interrupt circuit provides an interrupt signal in response to a detected overcurrent. The processor receives the interrupt signal and supplies a pulse-width modulation signal to the power supply and incrementally decreases the duty cycle of the pulse-width modulation signal in response to the interrupt signal. The radio frequency output stage may be disabled in response to the detected overcurrent.

495 citations

Journal ArticleDOI
TL;DR: In this paper, the authors summarize the state of knowledge of the effects of power system harmonics on equipment, including thermal overloading, disruption, and dielectric stressing, and quantitatively describe the effects.
Abstract: The authors summarize the state of knowledge of the effects of power system harmonics on equipment. The general mechanisms presented are thermal overloading, disruption, and dielectric stressing. Quantitative effects are presented or referenced whenever possible. However, many of the effects are can only be qualitatively described. The types of equipment considered are adjustable speed drives, capacitors, circuit breakers, fuses, conductors, electronic equipment, lighting, metering, protective relays, rotating machines, telephones, and transformers. >

441 citations

Journal ArticleDOI
TL;DR: Several optimization procedures, including direct methods and decomposition techniques, for solving this large scale coordination problem are described, and results of optimally coordinating directional overcurrent relays in power systems with up to 30 buses are presented.
Abstract: The authors present a new methodology based upon the principles of optimization theory, to treat the problem of optimal coordination of directional overcurrent relays in interconnected power systems. With the application of the proposed technique, this coordination problem is stated as a parameter optimization problem, which in general, is of a large dimension, especially when many different system configurations and perturbations are to be considered. Several optimization procedures, including direct methods and decomposition techniques, for solving this large scale coordination problem are described, and results of optimally coordinating directional overcurrent relays in power systems with up to 30 buses are presented. >

436 citations

Journal ArticleDOI
T. Kawabata1, S. Higashino1
TL;DR: In this paper, the authors discuss the problem of parallel operating systems of voltage source inverters with other inverters or with the utility source and propose several methods for protection against failure.
Abstract: Parallel operating systems of voltage source inverters with other inverters or with the utility source are sensitive to disturbances from the load or other sources and can easily be damaged by overcurrent. Thus extremely careful attention should be given to the system design of parallel operating inverters. Types of system configuration, control methods, and means of protection against failure are summarized, and several methods are proposed. Features and problems of these systems are discussed. >

404 citations


Network Information
Related Topics (5)
Electric power system
133K papers, 1.7M citations
91% related
AC power
80.9K papers, 880.8K citations
91% related
Fault (power engineering)
119.7K papers, 981.6K citations
88% related
Voltage
296.3K papers, 1.7M citations
87% related
Wind power
99K papers, 1.5M citations
82% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023219
2022404
2021331
2020653
2019845
2018993