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