Energy-saving type IGBT (insulated gate bipolar transistor) serial inverting medium-frequency power source device
An intermediate frequency power supply, energy-saving technology, applied in output power conversion devices, electrical components, high-efficiency power electronic conversion and other directions, can solve the problems of low power factor, harmonic pollution, line loss, etc., achieve high power factor, harmonic The effect of low pollution and fast melting speed
Active Publication Date: 2015-05-20
WEIFANG JINHUAXIN ELECTRIC FURNACE MFG
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Problems solved by technology
[0003] At present, there are basically two melting forms used in the domestic foundry industry. One is to use coke cupola melting, and the other is to use traditional parallel thyristor intermediate frequency power supply (KGPS) for melting; coke cupola melting is due to low work efficiency and serious energy waste. , Serious environmental pollution, and difficulty in controlling the quality of castings have been banned by the country; the parallel thyristor intermediate frequency power supply adopts voltage regulation and power adjustment, and the load adopts parallel resonance mode, so its power factor cannot always be maintained at 0.93 Above, the power factor is low during low power operation, the harmonic pollution is serious, and the current distortion is high. In addition, the parallel inverter becomes a current type inverter, and the line loss is serious when the voltage is low and the current is large.
These two kinds of heating equipment have low working efficiency, serious energy waste, and serious pollution to the power grid and the environment.
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[0032] In an embodiment, the energy-saving IGBT series inverter intermediate frequency power supply device includes an electrically connected IGBT series inverter circuit, a rectification main circuit, a drive power circuit, a voltage-controlled oscillation circuit, a rectification pulse forming circuit and a protection signal circuit.
[0033] as attached figure 1 As shown, the IGBT series inverter circuit includes IGBT modules T1, T2, T3, T4 and capacitors C1, C2. The inverter consists of IGBT modules T1, T2, T3, T4 and capacitors C1, C2 to form a single-phase inverter bridge. IGBT The gate of the module T1 is connected to the positive pole of the capacitor CF1, the negative pole of the capacitor CF1 is connected to the positive pole of the capacitor CF2, the negative pole of the capacitor CF2 is connected to the emitter of the IGBT module T2, the collector of the IGBT module T2 is connected to the emitter of the IGBT module T1, and the IGBT module T1 The collector of the IG...
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The invention relates to an energy-saving type IGBT (insulated gate bipolar transistor) serial inverting medium-frequency power source device. The energy-saving type IGBT serial inverting medium-frequency power source device comprises an IGBT serial inverting circuit, a rectifying main circuit, a driving power source circuit, a pressure-controlled oscillation circuit, a rectifying pulse forming circuit and a protection signal circuit which are electrically connected. The energy-saving type IGBT serial inverting medium-frequency power source device has the advantages that the power factor is high, the harmonic pollution is little, the circuit loss is small, the electric consumption amount is little, the melting speed is high, the energy source is saved, and the pollution to a power grid and environments is avoided.
Description
technical field [0001] The invention relates to an energy-saving IGBT series inverter intermediate frequency power supply device, which belongs to the field of frequency conversion and current conversion technology and casting technology. Background technique [0002] With the continuous expansion of the application field of induction heating and the continuous development of power semiconductor device technology, and in response to the call of the national energy conservation and emission reduction policy, the medium frequency induction heating power supply is developing in the direction of energy saving, fast and no harmonic interference. In terms of control system, it is developed from analog control to digital control to improve the integration and stability of the control system; in terms of intelligent control, through automatic control equipment such as PLC and configuration software, the intelligence of the whole set of equipment is gradually realized; In terms of in...
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IPC IPC(8): H02M1/42H02M7/521H02M7/219
CPCH02M7/5387Y02B70/10
Inventor 陈红梅王永华
Owner WEIFANG JINHUAXIN ELECTRIC FURNACE MFG