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Power inverter

An electrical power converter is a device used for processing electrical power from one form into another form that meets the requirements of an electrical system. Electrical power converters commonly are used to change alternating-current (AC) power to direct current (DC) power or vice versa, or to change one DC voltage level to another. A power converter that changes DC power to AC power is commonly referred to as a "power inverter." A power inverter converts DC to AC by passing a succession of variable amplitude DC pulses through a filter circuit. These DC pulses transport energy stored in a large capacitor, or other DC source, to a filter circuit. Power inverters are necessary in modem power systems for the new energy generating devices such as photovoltaic devices, micro-turbines, fuel cells, superconducting storage, etc., that generate AC or DC electricity that needs to be converted to a conditioned AC for feeding into the power grid or for direct connection to loads. Power inverters are used in a wide variety of mobile and fixed locations, including boats, recreational vehicles, trucks, automobiles, construction sites, factories, remote homes and cabins. Commonly, such inverters provide single phase AC power (120VAC or 230VAC) from a 12V or 24V battery commonly found in vehicles and boats. Three-phase, DC to AC power inverters are used in electric power distribution systems. These devices have a set of switches that are used to convert a dc voltage signal into discreetly displaced square waveforms. The waveforms are subsequently combined to produce a high quality sinusoidal output signal.

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