variable voltage - variable frequency inverter

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• 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

• Inverter (electrical) — An inverter is an electrical device that converts direct current (DC) to alternating current (AC)[1]; the converted AC can be at any required voltage and frequency with the use of appropriate transformers, switching, and control circuits. Solid… …   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

• Inverter (air conditioning) — The inverter tag found on some air conditioners signifies the ability of the unit to continuously regulate its thermal power flow.Traditional reverse cycle air conditioners use a heat pump that is either working at maximum capability or switched… …   Wikipedia

• Solar inverter — Internal view of a solar inverter. A solar inverter or PV inverter is a critical component in a Photovoltaic system. It performs the conversion of the variable DC output of the Photovoltaic (PV) modules into a utility frequency AC current that… …   Wikipedia

• Grid tie inverter — A grid tie inverter, or a (GTI) is an electrical device that allows solar power users to complement their grid power with solar power. It works by regulating the amount of voltage and current that is received from the direct current solar panels… …   Wikipedia

• Seoul Subway Line 7 — Infobox Korean name title = Seoul Subway Line 7 color = #5d6622 fontcolor = #FFFFFF imgwidth = 120px caption = Transfer Sign rr = Seoul Jihacheol Chil ho seon mr = Sŏul Chihach ŏl Chil ho sŏn hangul = 서울 지하철 제7호선 hanja = 서울 地下鐵 第七號線Seoul Subway… …   Wikipedia

• Electric motor — For other kinds of motors, see motor (disambiguation). For a railroad electric engine, see electric locomotive. Various electric motors. A 9 volt PP3 transistor battery is in the center foreground for size comparison. An electric motor converts… …   Wikipedia

• electric motor — motor (def. 4). [1885 90] * * * Introduction       any of a class of devices that convert electrical energy to mechanical energy, usually by employing electromagnetic phenomena.       Most electric motors develop their mechanical torque by the… …   Universalium

• Uninterruptible power supply — A small free standing UPS …   Wikipedia

• Rotary phase converter — DefinitionA rotary phase converter, abbreviated RPC, is a Rotary converter that produces Three phase electric power from Single phase electric power. This allows three phase loads to run using generator or utility supplied single phase electric… …   Wikipedia