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　　Medium-frequency induction furnace manufacturer: A medium-frequency induction furnace mainly consists of a controllable or non-controllable rectifier, a filter, an inverter, and several control and protection circuits. During operation, three-phase power at industrial frequency is converted into pulsating DC by the rectifier, then further smoothed into pure DC by the filter before being fed to the inverter. The inverter uses thyristors as electronic switches to convert the DC into high-frequency current, which is then supplied to the load.

　　The manufacturer of medium-frequency induction furnaces explains that in a medium-frequency induction furnace, medium-frequency current delivers energy to the load via an induction coil, which is an integral part of the inverter. The induction coil and the charge material exhibit a very low power factor, necessitating the use of tuning capacitors to supply non-functional energy to the induction-heating load. In practice, capacitors are used either in series or in parallel with the induction coil.

　　According to the manufacturer of medium-frequency induction furnaces, a single power supply can simultaneously power two furnaces, with power allocation freely adjustable—this configuration is known as a “one-to-two” medium-frequency induction furnace. These furnaces enable continuous melting, allow temperature adjustment, and can achieve high production capacities. The key feature of this technology is the use of series-connected inverter thyristor medium-frequency power supply technology. Although thyristors are employed to fully control the entire furnace, they do not require voltage regulation; instead, they facilitate soft starting and act as electronic switches in case of faults, quickly cutting off the power supply. During normal operation, the thyristors remain fully conducting, which results in a high power factor for the grid supply and significantly reduces harmonic interference.

　　The control circuit employs a digital shift-trigger circuit. This digital shift-trigger circuit features excellent repeatability, high stability, strong anti-interference capability, and convenient debugging. If digital signals are used, remote control can be achieved. This series of inverters adopts a half-bridge circuit, boasts a high power factor, and can be started at will under full-load and heavy-load conditions in medium-frequency induction furnaces.

　　The manufacturer of medium-frequency induction furnaces would like to remind you that when selecting a medium-frequency furnace switch, you need to pay close attention. Medium-frequency furnace switches are typically used for switching between two furnace bodies via induction. Their main feature is their ability to handle relatively high currents and operate with double-pole, double-throw functionality. Since medium-frequency furnace switches with different frequencies and rated currents are suitable for different types of medium-frequency furnaces, choosing the right switch becomes crucial.

　　When selecting an intermediate-frequency induction furnace switch, be sure to disconnect the parallel capacitors first, as an arc may occur between the stationary and moving contacts of the switch during operation, potentially generating voltage. Therefore, when making your selection, ensure that the switch’s capacity is appropriately matched. In addition, choose a suitable set of parallel capacitors. During the operation of the intermediate-frequency induction furnace switch, it’s also essential to perform regular maintenance. This includes periodic upkeep of the cooling system, as well as regular servicing of the water pump motor and the hydraulic station motor within the switch.