Application of Multiple Inverted Power Sources in Heartbeat Induction Furnaces
The power supply of traditional cored induction furnace is composed of inductor,balanced reactance and capacitor balance circuit.The voltage of inductor is controlled by voltage regulator and the power of inductor is regulated by divider contactor.Contactor switching volt-age gear causes huge current shock to inductor melt groove,which is the main factor affecting the stable operation and life of inductor.The power supply device is a control device based on dual DSP+dual FPGA+CPLD core controller,mainly composed of the main circuit part and the control part.The main circuit part mainly includes:circuit breaker,main contactor,soft start current limiting resistor and auxiliary con-tactor,filter and power unit body composed of converter chain.The control part realizes the power control by controlling the voltage current,load current and compensation current of the grid.Direct current side voltage dynamic voltage equalization strategy.Power device drive and heat dissipation design at higher switching frequencies.Filter design and application.Hardware design and application of high voltage function based on H bridge cascade of low voltage devices.It is of great practical significance to explore a new power supply scheme,ensure power supply security,reduce energy consumption and build"green power grid".
induction furnacevariable frequency power supplyinversionenergy conservationefficiency
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