The maximum frequency of induction heaters is typically around 400 kHz, as indicated in the reference material. This high-frequency range is suitable for applications such as smelting small amounts of precious metals and heating small to medium-sized parts with a thin hardened layer.
The high-frequency induction heating operates at 100～500 kHz, with an effective hardening depth of 0.5-2 mm. This frequency range is ideal for fast, cost-effective, and compact heating solutions, mainly used for small and medium-sized parts requiring a thin hardened layer, such as small module gears and medium-sized shafts.
Medium frequency induction heating machines have a frequency range of 1kHz to 10kHz, which is suitable for large tempering, quenching, and heating of larger workpieces. Super audio frequency induction heating power supplies use induction heating to heat electrically conductive materials, with the frequency of the electric current depending on the object size, material type, coupling, and penetration depth.
Induction furnaces generally operate within a frequency range of 50 to 400 kHz, with the possibility of going higher depending on the melting speed, type of material, and furnace volume. Lower frequencies have higher penetration into the metal, referred to as skin depth.
In summary, the maximum frequency of induction heaters is around 400 kHz, which is suitable for various applications, including smelting small amounts of precious metals and heating small to medium-sized parts with a thin hardened layer.
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