Medium-Frequency Furnace Reactors
Medium-Frequency Furnace Reactors are commonly used in medium-frequency power supplies and are installed within the power supply cabinet. Different models of reactors are used depending on the heating power of the medium-frequency furnace. They consist of two coils wound around silicon steel sheets and cooled by water. The reactor is insulated using insulating varnish, glass ribbon, and tape.
I. Applications of Medium-Frequency Furnace Reactors
1. Medium-Frequency Furnace Reactors smooth and stabilize the output current of the medium-frequency furnace rectifier.
2. When the inverter thyristor is short-circuited, the medium-frequency furnace reactor limits the rate of increase and the maximum short-circuit current.
3. Medium-Frequency Furnace Reactors are a key component for impedance matching, providing voltage reduction, isolation, and impedance matching for the medium-frequency power supply.
4. Improperly designed parameters, poor core material, or substandard manufacturing processes can significantly impact the reliability of the medium-frequency power supply.
II. Environmental Requirements for Medium-Frequency Furnace Reactors
1. Altitude not exceeding 1000 meters.
2. Operating ambient temperature -5°C to +50°C, relative humidity not exceeding 90%.
3. A cooling water source must be available at the site of use, with the required cooling water inlet pressure being 0.2 MPa to 0.3 MPa.
4. The cooling water must be free of mechanical impurities, solids content not exceeding 250 mg/L, and hardness not exceeding 10 degrees.
5. When the medium-frequency furnace reactor is in operation, the water supply must not be disconnected, and the inlet water temperature must be 5°C to 35°C.
6. The installation site must be free of explosion hazards, gases and conductive dust that could corrode metal or damage insulation, and severe vibration and turbulence.
III. Structural Features of Medium-Frequency Furnace Reactors
1. Medium-frequency furnace reactors are indoor, water-cooled devices featuring a compact, rational structure and ease of use. The medium-frequency furnace reactor consists of a magnetic circuit, primary and secondary windings, and a cooling water circuit.
2. The core of the medium-frequency furnace reactor is a shell-type structure, constructed from laminated δ0.35mm cold-rolled high-silicon steel sheets. The coil is a pancake-type structure, wound with T2 rectangular copper tubes, with the primary and secondary windings overlapping. Both the core and coil are water-cooled. The primary and secondary windings can be combined to create odd or even turns ratios as needed.
3. Users can choose between intermittent and continuous operation modes, depending on the power, frequency, and water cooling requirements specified by the product.
4. To reduce the complexity of connecting the water circuit, each medium-frequency furnace reactor comes with a water collector, making installation and operation more convenient and reliable. 4. Water Connections for Medium-Frequency Furnace Reactors:
The cooling water pipe connections for medium-frequency furnace reactors utilize standardized universal induction equipment water and electricity connection interfaces. Each reactor is provided with a detailed water connection diagram upon shipment.
5. Strict Factory Inspection of Medium-Frequency Furnace Reactors:
Medium-Frequency Furnace Reactors comply with the national standard JB-T3924-1999 for reactors used in medium-frequency induction heating equipment. Each reactor undergoes a 3kV high-voltage withstand voltage test for one minute. From assembly to shipment, each unit undergoes four water pressure tests of no less than 0.5MPa to ensure product quality.
Ⅳ. Advantages of Medium-Frequency Furnace Reactors:
1. Protecting the Induction Coil: Medium-Frequency Furnace Reactors limit current, reduce current peaks, and lower the electromagnetic field strength of the induction coil within the furnace, thereby protecting the coil and extending its life.
2. Controlling Electromagnetic Energy Input: Medium-Frequency Furnace Reactors control the electromagnetic energy input, thereby controlling the temperature of the molten material and the furnace temperature, ensuring stable quality. 3. Improve production efficiency. Medium-frequency furnace reactors control the power supply output current waveform and the input of electromagnetic energy, thereby improving production efficiency and quality.
4. Save energy. By controlling the input of electromagnetic energy, medium-frequency furnace reactors can help save energy, reducing energy consumption while improving production efficiency and quality.