| 摘要 |
A travelling wave induction heater comprising a plurality of primary windings (W) and associated core means (P), means to connect successive windings to successive phases of a multi-phase electric supply to provide the primary of the travelling wave induction heater, and an electrically conductive member which provides the secondary of the heater, wherein the secondary (20,21;24,25;36,38;41) has a non-uniform electrical conductivity, the distribution of electrical conductivity being such as to provide a desired distribution of heating in the secondary. |
