An energy-saving igbt series inverter intermediate frequency power supply 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, line loss, harmonic pollution, etc., and achieve high power factor and melting speed. Fast, low harmonic pollution effect
Active Publication Date: 2018-03-06
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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Embodiment
[0030] In an embodiment, an energy-saving IGBT series inverter intermediate frequency power supply device includes an electrically connected IGBT series inverter circuit, a rectifier main circuit, a drive power circuit, a voltage controlled oscillation circuit, a rectifier pulse forming circuit, and a protection signal circuit.
[0031] 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. The collector of the module T1 is connected to the positive electrode of the capacitor CF1, the negative electrode of the capacitor CF1 is connected to the positive electrode of the capacitor CF2, the negative electrode 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 o...
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The invention relates to an energy-saving IGBT (Insulated Gate Bipolar Transistor) series inverter medium frequency power device. The device comprises an IGBT series inverter circuit, a rectifying main circuit, a driving power circuit, a voltage controlled oscillating circuit, a rectification pulse forming circuit and a protection signal circuit which are electrically connected. The device has the characteristics of high power factor, small harmonic pollution, small line loss, low power consumption, high smelting speed, energy saving and capability of avoiding pollution of a power grid and the environment.
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 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 technology, at the same time in response to the call of the national energy saving 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 the control system, the development is shifted 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 whole set of equipment is gradually realized intelligently; In the form of inversion, the development ...
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IPC IPC(8): H02M1/42H02M7/521H02M7/219
CPCH02M7/5387Y02B70/10
Inventor 张三强马瑞芹
Owner WEIFANG JINHUAXIN ELECTRIC FURNACE MFG