時(shí)間：2011-03-11 23:18來源：藍(lán)天飛行翻譯 作者：航空 點(diǎn)擊：次
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sequential logic devices. Digital memory devices that have several inputs and several outputs. The combination of bits at the outputs is determined by the bits on the inputs and the bits that were previously on the inputs. serial operation (computer operation). Data transfer by moving bits sequentially, one at a time, rather than simultaneously, as is done by parallel operation. Series operation is much slower than parallel operation, but it requires far less complex circuitry. series circuit. A type of circuit in either an electrical or a fluid power system in which all of the components are connected in such a way that they provide only one path from the source of current or fluid flow, through all of the components, and back to the source. series-parallel circuit (electrical circuit). A type of electrical circuit in which some of the components are connected in series, and others are connected in parallel. series resonant circuit. A resonant AC electrical circuit that contains a capacitor and an inductor connected in series. At the resonant frequency of the circuit, the inductive reactance and the capacitive reactance are the same. But they are 180° out of phase, and they cancel each other. series-wound generator (electrical generator). A form of electrical generator in which the field coils are connected in series with the armature. Series-wound generators are not commonly used to supply power for aircraft electrical systems because of the difficulty in controlling the output voltage. series-wound motor (electric motor). A commutator-type electric motor that has the field coils connected in series with the armature. A series-wound motor has a high starting torque, but if it is not operated with a mechanical load connected to it, it will accelerate to a speed that will destroy it. Starter motors for both reciprocating engines and gas turbine engines are series-wound. |
