| 摘要 |
<p>A planar flyback transformer comprises a low coercivity magnetic material core 11, 12 and one or more printed circuit boards 2, 3 with conductive tracks arranged to form at least a primary coil and a secondary coil, each spiralling around a portion 14 of the said core. The transformer has an output voltage rating of at least 380 V and a secondary to primary voltage ratio divided by a secondary to primary turns ratio which is greater than 7. The distances between members of the transformer may be set relative to the voltages arising between such members. The transformer may be integrally formed with a printed circuit board carrying other components. The transformer may be used in a compact battery operated instrument suitable for providing a high voltage output signal for insulation testing.</p> |
