Medium-frequency induction heating power supply system with two modes of smelting and stirring

Abstract

The utility model discloses a medium-frequency induction heating power supply system with a smelting mode and a stirring mode. Power frequency three-phase alternating current is connected to the rectification disc ACIPANEL, the output end of the rectification disc ACIPANEL is divided into a positive electrode and a negative electrode, a reactor CLR is connected to the negative electrode in series, the two ends of a filter capacitor C0 are connected to the positive electrode and the negative electrode respectively, the positive side and the negative side of an inverter disc INV PANEL are connected to the positive electrode and the negative electrode respectively, the other end of a coil COIL is connected with one end of a resonant capacitor C1 and one end of a capacitor C2 through a switch A1 and a switch A3, and the other end of the capacitor C1 is connected with the positive electrode and the negative electrode respectively. The other end of the capacitor C2 is connected with the positive electrode and the negative electrode through the switch A2. The smelting furnace adopts a dual-mode operation state, a smelting mode and a stirring mode, is suitable for alloy smelting, operates at high power in the smelting mode, can quickly heat up and smelt, and improves the production efficiency; and in the stirring mode, low-power operation is achieved, temperature rise is avoided for a long time, stirring is intense, the stirring effect is uniform, and uniform distribution of alloy components is ensured.

Description

Technical Field

[0001] The utility model relates to the field of heating power supplies, and particularly to an intermediate frequency induction heating power supply system with two modes of melting and stirring. Background Art

[0002] The series resonance adopted by the intermediate frequency induction heating power supply, that is, voltage type resonance frequency tracking, is a device for providing power. With the rapid development of China's industrialization process, the induction heating field is also developing rapidly. Due to environmental protection requirements and the rising price of coal, heating with coking coal not only does not meet environmental protection requirements, but is also very uneconomical in terms of price and economy. On the other hand, industrial heating still widely uses intermediate frequency heating equipment with thyristors as the main devices in KGBS. The low power factor consumes a large amount of electric energy. Energy conservation, consumption reduction, and cost reduction have become very urgent issues for small and medium-sized enterprises. The existing intermediate frequency induction heating power supply system only has a single-mode operation state, one is the melting mode, and the other is the stirring mode. The use cost is relatively high and it cannot meet the requirements of energy conservation and consumption reduction. Content of the Utility Model

[0003] The purpose of the utility model is to provide an intermediate frequency induction heating power supply system with two modes of melting and stirring to solve the above technical problems.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An intermediate frequency induction heating power supply system with two modes of melting and stirring, characterized in that it includes a rectifier panel ACIPANEL, a reactor CLR, a filter capacitor C0, an inverter panel INV PANEL, a coil COIL, a resonance capacitor C1, a resonance capacitor C2, a switching switch DC BALANCE, a switching switch AC BALANCE, a switching switch A1, a switching switch A2, and a switching switch A3; the coil COIL includes an upper coil TOP COIL and a lower coil BOTTOM COIL; the industrial frequency three-phase alternating current is connected to the rectifier panel ACIPANEL, the output end of the rectifier panel ACIPANEL is divided into positive and negative poles, the negative pole is connected in series with the reactor CLR, both ends of the filter capacitor C0 are respectively connected to the positive and negative poles, the positive and negative sides of the inverter panel INV PANEL are respectively connected to the positive and negative poles, the AC side of the inverter panel INV PANEL is connected to one end of the coil COIL, the other end of the coil COIL is connected to one end of the resonance capacitor C1 and the capacitor C2 through the switch A1 and the switch A3, the other end of the capacitor C1 is respectively connected to the positive and negative poles, the other end of the capacitor C2 is respectively connected to the positive and negative poles through the switch A2, the positive and negative poles on the left and right sides are connected through the switch DC BALANCE, and the upper coil TOP COIL and the lower coil BOTTOM COIL are connected through the switch AC BALANCE.

[0006] Compared with the prior art, the utility model has the following advantages: The utility model adopts a dual-mode operation state, one is the melting mode, and the other is the stirring mode, achieving the effect of low power consumption of the equipment and greatly reducing costs; it is suitable for alloy melting. In the melting mode, it operates at high power, can quickly heat up and melt, and improve production efficiency; in the stirring mode, it operates at low power, does not heat up for a long time, stirs strongly and evenly, ensuring the uniform distribution of alloy components. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is the circuit schematic diagram of the utility model;

[0008] Figure 2 is the schematic diagram of the melting mode of the utility model;

[0009] Figure 3 is the schematic diagram of the stirring mode of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0010] The utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0011] As Figures 1-3 shown, an intermediate frequency induction heating power supply system with two modes of melting and stirring includes a rectifier panel ACIPANEL, a reactor CLR, a filter capacitor C0, an inverter panel INV PANEL, a coil COIL, a resonant capacitor C1, a resonant capacitor C2, a switching switch DC BALANCE, a switching switch AC BALANCE, a switching switch A1, a switching switch A2, and a switching switch A3; the coil COIL includes an upper coil TOP COIL and a lower coil BOTTOM COIL; industrial frequency three-phase alternating current is connected to the rectifier panel ACIPANEL, the output end of the rectifier panel ACIPANEL is divided into positive and negative poles, the reactor CLR is connected in series in the negative pole, the two ends of the filter capacitor C0 are respectively connected to the positive and negative poles, the positive and negative sides of the inverter panel INV PANEL are respectively connected to the positive and negative poles, the AC side of the inverter panel INV PANEL is connected to one end of the coil COIL, the other end of the coil COIL is connected to one end of the resonant capacitor C1 and the capacitor C2 through the switch A1 and the switch A3, the other end of the capacitor C1 is respectively connected to the positive and negative poles, the other end of the capacitor C2 is respectively connected to the positive and negative poles through the switch A2, the positive and negative poles on the left and right sides are connected through the switch DC BALANCE, and the upper coil TOP COIL and the lower coil BOTTOM COIL are connected through the switch AC BALANCE.

[0012] Figure 2 Schematic diagram of the melting mode. In the melting mode: switches A1, DC, and AC are closed, and switches A2 and A3 are open.

[0013] Figure 3 Schematic diagram of the stirring mode. In the stirring mode: Switch A2 and A3 are closed, and switches A1, DC, and AC switches are open.

[0014] Three-phase alternating current is introduced through the power input terminal, converted into direct current through the rectifier bridge circuit, filtered through CLR and filter capacitors, and finally converted into alternating current through the inverter circuit and connected to the terminal load coil.

[0015] The circuit can have two operating modes, the melting mode and the stirring mode, by switching the different on / off states of switches A1, A2, A3, DC, and AC; and in both modes, the switching of the switches also results in different combinations of resonant capacitors, so the operating frequencies are different.

[0016] The terminal power consumption circuit includes two induction coils, namely the upper coil and the lower coil; in the melting mode, the upper and lower coils are connected in parallel and there is no phase difference; in the stirring mode, the upper and lower coils operate independently and have a 90° phase difference, making the electromagnetic force of the molten metal in the furnace unbalanced and realizing the function of stirring the molten metal up and down.

[0017] Suitable for alloy melting applications. In the melting mode, it operates at high power, can quickly heat up and melt, and improve production efficiency; in the stirring mode, it operates at low power, does not heat up for a long time, stirs strongly and evenly, ensuring uniform distribution of alloy components.

[0018] The above is the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, the changes, modifications, substitutions, and variations made to the implementation manners still fall within the protection scope of the present invention.

Claims

1. A medium frequency induction heating power supply system with two modes, namely, melting and stirring, the medium frequency induction heating power supply system comprises a left heating power supply system and a right heating power supply system, the left heating power supply system and the right heating power supply system are connected by a switching switch DC BALANCE and a switching switch AC BALANCE, characterized in that: Each heating power supply system includes a rectifier ACIPANEL, a left reactor CLR or a right reactor CLR, a filter capacitor C0, an inverter INV PANEL, a left coil BOTTOM COIL or a right coil TOP COIL, two series-connected resonant capacitors C1, two parallel-connected resonant capacitors C2, a switch A1, a switch A2 and a switch A3; the industrial frequency three-phase AC power is connected to the rectifier ACIPANEL, the output end of the rectifier ACIPANEL is divided into positive and negative poles, the negative pole is connected in series to one end of the left reactor CLR or the right reactor CLR, the two ends of the filter capacitor C0 are connected to the positive and negative poles respectively, the positive and negative sides of the inverter INV PANEL are connected to the positive and negative poles respectively, the AC side of the inverter INV PANEL is connected to one end of the left coil BOTTOM COIL or the right coil TOP COIL, the other end of the left coil BOTTOM COIL or the right coil TOP COIL is connected to one end of the two resonant capacitors C2 through the switch A1, the left coil BOTTOM COIL or the right coil TOP The other end of COIL is also connected to one end of the two resonant capacitors C1 through switch A3. At the same time, the same end of the two resonant capacitors C2 is also connected to the positive and negative electrodes respectively through switch A2. The other ends of the two resonant capacitors C1 are also connected to the positive and negative electrodes respectively. The other ends of the two resonant capacitors C2 are respectively connected to switch A3 and one end of the two resonant capacitors C1. The right coil TOP COIL and the left coil BOTTOM COIL are connected through the switch AC BALANCE.

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