| 摘要 |
The inductor (1) covered pref. by a layer of thermal insulation (2a) under the glass-ceramic hotplate (2) consists of e.g. a spiral of Cu wire (10) generating a magnetic flux which is conc. by an underlying magnetic circuit (4). The reluctance is chosen for saturation at a predetermined temp. well below the upper limit of the wire insulation. To increase the current drawn by the inductor when the magnetic circuit begins to be satd., a plate (5) of nonmagnetic but electrically conductive A1 underlies the magnetic circuit. |
