direct current


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Related to direct current: alternating current

current

 [kur´ent]
1. something that flows.
2. specifically, electricity transmitted through a circuit.
alternating current a current that periodically flows in opposite directions; its amplitude fluctuates as a sine wave.
convection current a current caused by movement by convection of warmer fluid into an area of cooler fluid.
direct current a current that flows in one direction only; when modeled as a wave, its amplitude is constant. When used medically it is called galvanic current. This current has distinct and important polarity and marked secondary chemical effects.
galvanic current a steady direct current.
current of injury an electric current that flows between injured myocardium and normal myocardium, because such cells have a reduced membrane potential; it may be either diastolic or systolic.
current of injury, diastolic the current that flows from injured to noninjured tissue during electrical diastole.
current of injury, systolic the current that flows from healthy tissue to injured tissue during electrical systole.
inwardly rectifying current current that rectifies so that it passes more easily towards the interior of a cell.
leakage current the electrical current that exists in the parts or metal case of electrical equipment.
outwardly rectifying current current that rectifies so that it passes more easily towards the exterior of a cell.
potassium rectifying c's transmembrane currents that rectify inwardly or outwardly to make adjustments in cellular functions; they are mainly responsible for the repolarization phase of the action potential. There are at least six mechanisms by which potassium ions move across cardiac cell membranes in the role of rectifier.

di·rect cur·rent (DC),

a current that flows only in one direction, for example, that is derived from a battery; sometimes referred to as galvanic current.
See also: galvanism.

direct current

A continuous electromagnetic current that flows in only one direction.

di·rect cur·rent

(DC) (di-rekt kŭrĕnt)
An electrical current that flows only in one direction; e.g., that derived from a battery; sometimes referred to as galvanic current.

di·rect cur·rent

(DC) (di-rekt kŭrĕnt)
An electrical current that flows only in one direction; also referred to as galvanic current.
References in periodicals archive ?
This paper purports PIPSO based optimal direct current vector control technique for GS-VSC in a photovoltaic incorporated AC micro-grid under load fluctuations and solar insolation variation.
Transcranial direct current stimulation for refractory auditory hallucinations in schizophrenia.
One important group of direct current applications are systems for providing uninterruptible power supply (UPS) to safety-critical equipment, such as that used in operating theatres.
The thermoelectric chiller was driven by a fixed 9.6 V direct current source and solar cells, respectively.
A direct current of 1-2 mA has been generally applied for a timespan ranging between 8 and 30 min.
The firm offers direct current (DC) fast-charging stations which lower charging times to 15 minutes compared with six to eight hours using standard alternating current (AC) charger outlets.Country: Netherlands, Sector: Machinery/EngineeringTarget: Epyon BVBuyer: ABB LtdType: Corporate acquisitionStatus: Agreed
NORDIC BUSINESS REPORT-November 2, 2010--Fingrid to build EUR320m direct current link Finland-Estonia(C)2010 M2 COMMUNICATIONS http://www.m2.com
The report provides the market drivers, restraints and market trends information for the four major smart grid technologies, namely smart meters, broadband over power line, high voltage direct current transmission systems and energy storage.
Initially, Solid State Systems' manufactured metalised paper and polyester direct current capacitors for its sole customer, Indian Telephone Industries Ltd (BOM:523610).
They cover principles of self-commutating conversion, multi-level voltage source conversion, multi-level reinjection, modelling and controlling converter dynamics, pulse-width-modulation high-voltage direct current transmission, ultra-high-voltage voltage-source conversion transmission, ultra-high-voltage self-commutating current-source conversion transmission, back-to-back asynchronous interconnection, low-voltage high-direct-current AC-DC conversion, and power conversion for high-energy storage.
says its SPY[R] 780 ergonomic FBE-coating holiday detector's direct current operation offers greater reliability and operating flexibility when FBE and other thin coatings are inspected.
Alliance & Leicester Premier Direct Current Account* 0.00%** Nil*** Barclays Bank Account 0.00%*** Nil Abbey Preferrred Overdraft Rate Account 0.00%*** Nil Figures based on an overdraft limit of pounds 500 * Minimum age 21, minimum credit of pounds 500 per month ** Interest free up to pounds 2,000 for the first 12 months *** Reverts to 50p per day - capped at 10 days per monthly charging period (pounds 5 max) after 12 months *** Interest free for the first 12 months (min credit, pounds 1,000 per month) Source:www.moneysupermarket.com

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