variable+frequency

См. также в других словарях:

• Variable 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

• Variable-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

• Variable-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.… …   Wikipedia

• Variable 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… …   Wikipedia

• variable-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

• variable-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

• Variable 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

• Variable 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… …   Wikipedia

• Variable 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… …   Wikipedia

• Frequency 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… …   Wikipedia

• Frequency 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