variable frequency

  • 1Variable Frequency Oscillator — (VFO) (engl: Oszillator mit veränderbarer Frequenz) ist der Oberbegriff für alle abstimmbaren Oszillatorschaltungen oder Frequenzgeneratoren. Im Regelfall wird entweder der Kondensator oder die Induktivität eines Schwingkreises geändert. VFO… …

    Deutsch Wikipedia

  • 2Variable-frequency drive — A variable frequency drive (VFD) is a system for controlling the rotational speed of an alternating current (AC) electric motor by controlling the frequency of the electrical power supplied to the motor.cite book | first=Sylvester J. |… …

    Wikipedia

  • 3Variable-frequency oscillator — A variable frequency oscillator (VFO) in electronics is a oscillator with an oscillation frequency that can be electronically changed (hence, variable).cite book |title=The ARRL Handbook for Radio Amateurs, Sixty Eighth Edition |editor=Larry D.… …

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  • 4Variable frequency transformer — A variable frequency transformer is used to transmit electricity between two asynchronous alternating current domains. The VFT is a relatively recent development (first deployed in 2004). Most grid interties use high voltage direct current… …

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  • 5variable-frequency electric drive — dažninė elektros pavara statusas T sritis automatika atitikmenys: angl. adjustable frequency electric drive; frequency regulated electric drive; variable frequency electric drive vok. Antrieb mit Frequenzregelung, m; frequenzgesteller Antrieb, m… …

    Automatikos terminų žodynas

  • 6variable-frequency control — dažninis valdymas statusas T sritis automatika atitikmenys: angl. variable frequency control vok. Frequenzsteuerung, f rus. частотное управление, n pranc. commande de fréquence, f …

    Automatikos terminų žodynas

  • 7Variable Frequency Oscillation Generator — n. audio oscillator invented by William R. Hewlett in which the frequency of the oscillations produced can be varied continuously …

    English contemporary dictionary

  • 8Variable fractional delay filter — Introduction= One important advantage of the variable digital filter is that the frequency characteristics, including the magnitude response and the phase response are tunable without re implementation of the filter. Variable fractional delay… …

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  • 9Variable speed air compressor — A Variable Speed Drive (VSD) Air Compressor [ [http://www.quincycompressor.com/qgv.html Variable Speed Drive Compressor] ] is an air compressor that takes advantage of Variable Speed Drive technology. This type of compressor uses a special drive… …

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  • 10Frequency synthesizer — A frequency synthesizer is an electronic system for generating any of a range of frequencies from a single fixed timebase or oscillator. They are found in many modern devices, including radio receivers, mobile telephones, radiotelephones, walkie… …

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  • 11Frequency changer — A frequency changer or frequency converter is an electronic device that converts alternating current (AC) of one frequency to alternating current of another frequency. The device may also change the voltage, but if it does, that is incidental to… …

    Wikipedia

  • 12frequency-regulated electric drive — dažninė elektros pavara statusas T sritis automatika atitikmenys: angl. adjustable frequency electric drive; frequency regulated electric drive; variable frequency electric drive vok. Antrieb mit Frequenzregelung, m; frequenzgesteller Antrieb, m… …

    Automatikos terminų žodynas

  • 13frequency — n. (pl. ies) 1 commonness of occurrence. 2 a the state of being frequent; frequent occurrence. b the process of being repeated at short intervals. 3 Physics the rate of recurrence of a vibration, oscillation, cycle, etc.; the number of… …

    Useful english dictionary

  • 14Variable-Speed Wind Turbines —   Turbines in which the rotor speed increases and decreases with changing wind speed, producing electricity with a variable frequency …

    Energy terms

  • 15Variable-speed wind turbines —   Turbines in which the rotor speed increases and decreases with changing wind speed, producing electricity with a variable frequency.   U.S. Dept. of Energy, Energy Information Administration s Energy Glossary …

    Energy terms

  • 16Frequency-hopping spread spectrum — (FHSS) is a method of transmitting radio signals by rapidly switching a carrier among many frequency channels, using a pseudorandom sequence known to both transmitter and receiver. A spread spectrum transmission offers three main advantages over… …

    Wikipedia

  • 17Frequency-Agile Solar Radiotelescope — (FASR) is a next generation radio telescope for solar observation in radio and microwave frequency range.On contrary to other general purpose radio telescopes such as VLA, FASR is specifically designed for solar observation. Compared with other… …

    Wikipedia

  • 18frequency distribution — n. a numerical tabulation in which the different observed values of a variable, or the different outcomes of an event, are grouped into classes, and the frequencies for each of these classes are given …

    English World dictionary

  • 19Variable capacitor — Rotary variable capacitor A variable capacitor (also known as a variable air condenser ) is a capacitor whose capacitance may be intentionally and repeatedly changed mechanically or electronically. Variable capacitors are often used in L/C… …

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  • 20Variable Specific Impulse Magnetoplasma Rocket — Artist s impression of several VASIMR engines propelling a craft through space The Variable Specific Impulse Magnetoplasma Rocket (VASIMR) is an electro magnetic thruster for spacecraft propulsion. It uses radio waves to ionize and heat a… …

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