transformer (redirected from Auto Transformer)

transformer

[-fôr′mər]

Etymology: L, transformare, to change shape

an electric apparatus that changes alternating current of one voltage into a different voltage of the same frequency.

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transformer,

n an electrical device that increases or reduces the voltage of an alternating current by mutual induction between primary and secondary coils or windings.

transformer, auto-,

n See autotransformer.

transformer, Coolidge filament,

n.pr a step-down transformer that reduces line voltage of 110 volts to 12 volts, which in turn heats the tungsten filament of the Coolidge tube for the production of electrons.

transformer, step-down,

n a transformer in which the secondary voltage is less than the primary voltage.

transformer, step-up,

n a transformer in which the secondary voltage is greater than the primary voltage.

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transformer

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.

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transformer fluid

may cause poisoning due to its polychlorinated biphenyl content.

step-down transformer

one for lowering the voltage of the original current.

step-up transformer

one for raising the voltage of the original current.