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Inverting

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Inverting 

in electric power engineering, the conversion of direct electric current to single-phase or polyphase alternating current by means of a device that consists of controlled electric valves. Inverting is the reverse of rectifying.

Inverter circuits with several electric valves are used in practice. The power losses in inverting depend on the voltage drop Δ U in the valves. The ratio of power losses in the valves to the useful converted power is approximately equal to Δ U/U, where U is voltage of the DC power supply. In mercury valves Δ U does not exceed several dozen volts. For DC voltages of several kilo-volts the inverting losses in valves are less than 1 percent. The losses in other parts of the circuit (chokes, capacitors, and control circuits) usually do not exceed a few percent. The total efficiency of inverting is usually above 90 percent.



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I suppose there is some other reason for inverting the customary order of things, and keeping the lieutenant on shore after the captain is on board?
To share lodgings with a brilliant dinner-companion, or to see your favorite politician in the Ministry, may bring about changes quite as rapid: in these cases too we begin by knowing little and believing much, and we sometimes end by inverting the quantities.
Still more pleased was he when, inverting a leathern pouch over the end of the reed, and so filling it with the gas, he was able to send it soaring up into the air.
 
 
 
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