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Toroidal transformer. Donut-shaped toroidal transformers save space compared to E-I cores, and may reduce external magnetic field. These use a ring shaped core, copper windings wrapped around this ring (and thus threaded through the ring during winding), and tape for insulation.
Transformer winding primary (usually high-voltage) connecting wires are of many types. They may be labeled as H 1, H 2 (sometimes H 0 if it is internally designed to be grounded) and X 1, X2 and sometimes an X 3 tap may be present.
A 230 V isolation transformer A simple 1:1 isolation transformer with an extra dielectric barrier and an electrostatic shield between primary and secondary. The grounded shield prevents capacitive coupling between primary and secondary windings.
The Gamesa G128-4.5 MW wind turbine, from Gamesa, near Jaulín, Zaragoza, Spain, is a wind turbine with the largest rotor, which surpasses with 128 metres (420 ft) that of the Enercon E-126 by 2 metres (6 ft 7 in).
An RVDT can also be designed with two laminations, one containing the primary and the other, the secondaries.These types can operate on larger rotations. A similar transformer is called the Rotary Variable Transformer and contains only one secondary winding giving only one voltage:
The flyback transformer circuit was invented as a means of controlling the horizontal movement of the electron beam in a cathode-ray tube (CRT). Unlike conventional transformers, a flyback transformer is not fed with a signal of the same waveshape as the intended output current.
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