transformer

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transformer

 [trans-for´mer]
an induction apparatus for changing electrical energy at one voltage and current to electrical energy at another voltage and current, through the medium of magnetic energy, without mechanical motion.
step-down transformer one for lowering the voltage of the original current.
step-up transformer one for raising the voltage of the original current.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
References in periodicals archive ?
This design had four turns on the secondary implemented using a single layer insulated wire, so it can eliminate creepage and clearance space requirements between the primary and secondary windings. Doubling the winding breadth of the primary by interleaving it with secondary effectively cut the leakage inductance value in half.
Our first optimization goal was to see how a gap between the nested primary and shorter secondary windings would affect the results.
Moreover, since the secondary windings are not symmetrical, they will not carry the same current.
In selecting the inductive load to the secondary winding in the circuit of the transformer we have used the values as shown in Figure 8.
The primary and secondary windings of the transformer may be a star or triangle are connected to the network.
In order to validate the theoretical investigation and calculations about the efficiency of using secondary windings, an experimental prototype of the motor with a segment stator, shown in Fig.
The secondary winding in Figure 1c has a center-tap, which makes the transformer useful as a balanced signal splitter; excellent amplitude and phase balance are obtainable with well designed RF transformers having this configuration.
Since the saturation network is also a short circuited secondary winding, but with a high resistance, a small current exists in and heats the metal in the saturation network.
The function of either is to make and break the primary circuit winding of the spark-coil, causing expansion and abrupt collapse of lines of magnetic force across the secondary winding of the coil, inducing a flow of current to, and a spark across the spark plug point-gap just before the engine piston reaches top dead-center during the fuel/air compression stroke.
The secondary winding is also single-turn, but covers all sections of the magnetic circuit.