What is induction heating?
Induction heating is an advanced technology that utilizes the principle of electromagnetic induction to heat conductive materials in a non-contact manner. This heating method is particularly suitable for processing precious metals such as gold, silver, platinum, palladium, etc., including various processes such as melting, annealing, quenching, welding, etc.
Working principle of induction heating power supply
| Power conversion: | First, convert the AC power (50/60Hz) into DC power through a rectifier circuit |
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| Inverter process: | Use power semiconductor devices (such as IGBT, MOSFET, etc.) to invert DC power into high-frequency AC power (frequency range usually ranging from 1kHz to several MHz) |
| Resonant matching: | Efficiently transmit high-frequency electrical energy to the induction coil through LC resonant circuit |
| Electromagnetic induction: | High frequency current generates a strong alternating magnetic field through an induction coil |
| Eddy current heating: | Precious metals placed in a magnetic field generate eddy currents due to electromagnetic induction and generate their own heat |
| Lower frequency (1-10kHz) | suitable for deep penetration heating of large volume precious metal materials |
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| Intermediate frequency (10-100kHz) | suitable for heating medium-sized workpieces |
| High frequency (above 100kHz) | used for surface heating or fine melting of small precious metals |
Typical Application of Induction Heating in Precious Metal Processing
Used for melting and refining precious metals such as gold and silver
Accurate temperature control can be achieved to reduce metal oxidation losses
Typical power range: 5-50kW, frequency 10-30kHz
Equipment commonly used in jewelry processing
Quickly melt small amounts of precious metals (usually several grams to several hundred grams)
The operating frequency is usually between 50-200kHz
Including annealing, quenching and other processes
Used to improve the mechanical properties and durability of precious metal products
Advantages of Induction Heating Power Supply
A complete precious metal induction heating system typically includes:
The induction heating power supply converts ordinary AC electricity into high-frequency electrical energy through the process of rectification → inversion → resonance → electromagnetic induction, causing precious metals to generate heat on their own. Its core lies in high-frequency inverter technology and harmonious vibration matching, combined with intelligent control, to achieve efficient and precise heating, widely used in the melting, casting, and heat treatment of precious metals such as gold and silver.
Shenzhen Hasung Precious Metals Equipment Technology Co., Ltd. is a mechanical engineering company located in the south of China, in the beautiful and the most fastest economic growing city, Shenzhen. The company is a technological leader in the area of heating and casting equipment for the precious metals and new materials industry.
Our strong knowledge in vacuum casting technology further enables us to serve industrial customers to cast high-alloyed steel, high vacuum required platinum-rhodium alloy, gold and silver, etc.
