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在现代工业生产中,感应加热得到广泛的应用。但是,当感应加热用于内孔表面或平面加热时,由于感应器上的高频电流的邻近效应和圆环效应,使加热效率特别低,一般只有40～50％。如果在感应器上加上“口”形导磁体,将发生驱流作用,使邻近效应与圆环效应相一致,减小了工件表面与感应器有效部分的间隙,增加了感应器外表面的电流密度,从而使加热效率大为提高(可达85％左右)。因此,导磁体是提高感应器加热效率的有
In modern industrial production, induction heating has been widely used. However, when induction heating is applied to the surface of the inner hole or to the surface, the heating efficiency is extremely low due to the proximity effect of the high-frequency current and the ring effect on the inductor, which is generally only 40 to 50%. If the sensor with “mouth” shaped guide magnet, will have a role in the flow of displacement, so that the adjacent effects and circular ring effect, reducing the workpiece surface and the effective part of the sensor gap, increasing the outer surface of the sensor Current density, so that heating efficiency greatly improved (up to 85% or so). Therefore, the guide magnet is to improve the heating efficiency of the sensor there