Induction heater design have utilized the eddy current induction principle like a transformers - its core and windings can be seen as the primary side, but the work piece acts as a short-circuited secondary winding, which heats up rapidly due to its great electrical resistance. This phenomenon allows the induction heater to control the heating by continuously monitoring the work piece temperature and adjusting its own heating power during the process. Hence results in even heating of only the inner bearing ring but the heater itself remains cool and safe to handle

Induction heater design have utilized the eddy current induction principle like a transformers - its core and windings can be seen as the primary side, but the work piece acts as a short-circuited secondary winding, which heats up rapidly due to its great electrical resistance. This phenomenon allows the induction heater to control the heating by continuously monitoring the work piece temperature and adjusting its own heating power during the process. Hence results in even heating of only the inner bearing ring but the heater itself remains cool and safe to handle