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　　The medium-frequency induction furnace operates on the fundamental principle of electromagnetic induction: it rectifies three-phase power-frequency alternating current into direct current, and then converts this direct current into an adjustable medium-frequency current. This medium-frequency current is supplied to a load composed of capacitors and induction coils (which can be connected either in parallel or in series). As a result, high-density magnetic flux lines are generated within the induction coil, cutting through the metal material contained inside the coil and inducing massive eddy currents in the metal. These eddy currents share certain characteristics of medium-frequency currents—namely, the free electrons within the metal itself generate heat as they move through the resistive metal body. Medium-frequency electric furnace For example, if a metal cylinder is placed inside an induction coil carrying an alternating current at medium frequency, the cylinder will not come into direct contact with the coil. Moreover, the temperature of the coil itself remains quite low. Nevertheless, the surface of the cylinder will heat up to the point of turning red—and even melting—while the rate at which it turns red and melts can be precisely controlled simply by adjusting the frequency and the current intensity. If the cylinder is positioned at the center of the coil, the temperature around the cylinder will be uniform, and its heating and melting process will not produce any harmful gases or intense light pollution. This is a medium-frequency induction furnace.

　　Advantages of medium-frequency induction furnaces:

　　1. The medium-frequency induction furnace features a centrally controlled circuit board optimized through computer-aided design and an optimized combination of large-scale integrated circuits, ensuring stable equipment performance, reliable quality, and strong anti-interference capability.

　　2. The component layout is well-coordinated and reasonable, making maintenance and upkeep convenient.

　　3. Building on the zero-voltage start-up capability, the medium-frequency induction furnace has been further enhanced with an automatic frequency-sweep restart function, enabling the voltage and current loops to track each other closely. As a result, the equipment starts and stops smoothly, with no inrush current.

　　4. The inverter start-up signal employs a single-signal, high-sensitivity trigger circuit, further enhancing the equipment’s start-up capability and achieving a 100% start-up success rate.

　　5. Medium-frequency electric furnace The constant-power circuit control system automatically and rapidly adjusts the optimal voltage and current in response to changes in the charge material during the production process, eliminating the need for manual adjustment of the inverter’s turn-off angle.

　　6. It is equipped with a comprehensive protection system that includes overvoltage, overcurrent, undervoltage, water shortage, phase failure, and voltage/current limiting functions, ensuring reliable equipment operation and stable performance.

　　7. The medium-frequency induction furnace features a highly integrated circuit design that makes both commissioning and operation quick, simple, and easy to learn.