Alternating-current electricity

Generators for use with the prime movers previously described will almost invariably operate in conjunction with an alternating current electrical system. Such a.c. generators will operate either in parallel with other sources of supply (i.e. a grid system or other generators) or in isolation providing the whole electrical supply to an installation. A.C. generators can be one of the two main types ... 

Next question The pump is driven by an ordinary alternating-current electric motor. It is running at 3600 rpm. When we switch from pumping water to naphtha, what happens to the speed of the pump ... 

In what follows, the laser damage characteristics are discussed when both alternating current electric fields and ultra-short pulse lasers are simultaneously applied to the dielectric materials. It is true that very high electric fields may allow the electron to reach an energy level sufficient to ionize, causing the impact ionization. As discussed earlier, the damage... 

In the direct current (DC) electrodeposition, the current source is a DC power source. A power source in the form of a battery or rectifier (which converts alternating current electricity to regulated low-voltage DC current) provides the necessary current. 

Most electronic equipment shares the television set s need for a number of differing voltages for the operation of individual components. This alone may be sufficient justification for the inclusion of a direct current to alternating current converter in fuel cell power systems. In addition, alternating current electric motors are more suitable in most applications. They tend to operate at a rotational speed controlled by the frequency of the current. If completely unloaded they speed up to this fixed velocity and accelerate no further. Many types of direct current motors, if operated unloaded, will continue to accelerate until they fail. A belt driven fan operated by an alternating current motor is undamaged by the failure of the belt. A direct current motor will require a special safety circuit to shut it down in case of belt failure. If the belt and the safety circuit both fail, the motor will speed up until it destroys itself. 

Although an oversimplification, DC electricity flows in one direction only, which is needed for the electrolytic process. AC (alternating current) electricity, such as used in our homes, flows in both directions at a specific frequency which is not suitable for use in the process of electrolysis unless it is rectified. 

He had several hundred patents on alternating current electricity and is the one responsible for developing the A.C. electric motor. 

Synchronous Inverter - An electrical inverter that inverts direct current electricity to alternating current electricity, and that uses another alternating current source, such as an electric power transmission and distribution network (grid), for voltage and frequency reference to provide power in phase and at the same frequency as the external power source. 

Transformer - An electromagnetic device that changes the voltage of alternating current electricity. It consists of an induction coil having a primary and secondary winding and a closed iron core. 

The field of dielectrophoresis is relatively recent. Herbert Pohl did dielectrophoretic research in the 1950s although this area did not gain wide visibility until his groundbreaking book Dielectrophoresis The behavior of neutral matter in nonuniform electric fields was published in 1978 [1]. In this book, the two main components of the electric field in alternating current (AC) dielectrophoresis were extensively discussed, namely, (i) a spatially nonuniform electric field and (ii) an alternating current electric field, both of which contribute to the nonlinear DEP force. Within the last 10 years. 

Dukhin AS, Dukhin SS (2005) Aperiodic capillary electrophoresis method using an alternating current electric field for separation of macromolecules. Electrophor 26 2149-2153... 

Alternating current electricity is generated at thermal power stations (coal-and oil-fired) and also at nuclear power stations under the control of the present Central Electricity Generating Board which, under the privatisation proposals, is now divided into two generating pics. It is then transmitted by... 

Chen, X. Q., Saito, T., Yamada, H. and Matsushige, K., Aligning single-wall carbon nanotubes with an alternating-current electric field . Applied Physics Letters, 2001, 78 (23), 3714-3716. 

Alternator A generator that produces alternating current electric power. 

Lighting from a 50 or 60 Hz alternating current electrical source can result in strobe effects on moving parts, making them appear to move slowly, move backwards or appear stationary. Machinists on lathes, for example, should be made aware of this. 

Bi R, Schlack M, Siefert E. Lord R. Conelly H (2010) Alternating current electrical field effects on lettuce (lactuca sativa) growing in hydroponic culture with and without cadmium contamination. J Appl Electrochem 40(6) 1217-1233... 

Alternating current electricity is generated in thermal power stations (coal-, gas- and oil-fired), in nuclear power stations, as well as using natural resources (e.g. wind farms). It is then transmitted by way of overhead lines at4(X)kV (i.e. at 400 000 volts) Figure 4.4.1), 275 kV or 132 kV to distribution substations where it is transformed down to 33 kV or 11 kV for distribution to large factories, or further transformed down to 230 V for use in domestic and commercial premises and smaller factories. 

Dukhin AS, Dukhin SS (2005) Aperiodic capillary electrt hore-sis method using an alternating current electric field foi separation of macromolecules. Electrr hor 26 2149-2153 Dukhin AS (1993) Biospecific mechanism of double laya- formation and peculiarities of cell electrophoresis. Colloid Surf A Physicochem Eng Asp 73 29-48... 

Sandifer, J.R. and R.P. Buck. 1975. An algorithm for simulation of transient and alternating current electrical properties of conducting membranes, junctions, and one-dimensional, finite galvanic cells. J. Phys. Chem. 79 384-392. 

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