Heat treatment equipment and air cooling unit

Abstract

The invention relates to the power electronic technology, and particularly relates to a heat treatment equipment and air cooling unit comprising laser beam guided infrared accurate temperature measurement and wireless data transmitting and receiving. Digital signal processing control panel DSP chip programmable phase control produces leading and lagging alternate phase shift two paths of pulse width modulation PWM1 and PWM2 signals. The upper pipe and the lower pipe set interlock dead time tDT which is coupled to two dual-path IGBT driving boards through optical fibers to form two half bridgeswhich are formed by parallel connection of dual-path IGBT modules and synthesized into an H-bridge inverter. The transformer matches and is connected in series with a resonance load circuit. Four bridge arm IGBT modules have balanced and equal alternate phase shift power consumption. Output power magnetic ring dual inductors suppress the ring current impact in a conjugated way. The water outlet pipe of the cooling water tank cyclically cools the three-phase rectifying module, the H-bridge IGBT modules, the impedance matching transformer, the induction furnace resonance inductors and the resonance capacitor through the water pump and the control valve so as to guarantee efficient and energy-saving, safe and reliable operation of heat treatment. The outstanding advantages of air cooling reside in no water consumption so as to meet the technical use requirements. The unit is suitable for heat treatment of wireless transmission infrared temperature measurement control and water-saving production.

Description

technical field [0001] The invention relates to power electronics technology, in particular to heat treatment equipment and an air cooling unit. Background technique [0002] The power capacity of the inverter IGBT module of the existing heat treatment equipment is insufficient, and the output power is usually increased by connecting the IGBT module in parallel. However, the saturation voltage drop of the IGBT module is inconsistent, and the parallel working current is unbalanced, resulting in a circulating current impact, which is very easy to burn out the IGBT module. . At the same time, the fixed phase-shift bridge arm pulse width modulation PWM drives the IGBT module full-bridge inverter, and the switching time of the phase-shifting bridge arm changes and the device loss is small, while the fixed bridge arm switching time does not change the device loss, and the power of the four bridge arms The power consumption is unbalanced, and the junction temperature of the fixed ...

AI Technical Summary

Problems solved by technology

[0005] The technical solution of the present invention: including three-phase AC power supply, AC contactor, digital signal processing control board model TMS320F28335 DSP chip programmable phase control to produce two-way pulse width modulation PWM with leading and lagging alternate phase shifting 1 , PWM 2 signal, the upper tube and the lower tube set the interlock dead time t DT , are respectively coupled to two dual-channel IGBT drive boards via optical fibers, and the two half-bridges connected in parallel to form dual-channel IGBT modules are combined into an H-bridge inverter. The transformer is used to match the series resonant load circuit, and the four bridge arm IGBT modules are diagonal Corner conduction, cut-off, zero-power soft start, equal phase-shift switching time, balanced power consumption, overcome the defect of large power consumption of the fixed bridge arm, the first dual-channel IGBT driver board output interface P 1 ,P 2 ,P 3 Connect the tube group Q of the bridge arm A of the IGBT module H-bridge inverter in sequence 1 Gate, collector, emitter, output interface J of the first dual-channel IGBT driver board 1 、J 2 、J 3 Connect the tube group Q of the bridge arm A of the IGBT module H-bridge inverter in sequence 1 n gate, collector, emitter, output interface P of the first dual-channel IGBT driver board 4 ,P 5 ,P 6 Connect the tube group Q of the bridge arm C of the IGBT module H-bridge inverter in sequence 3 Gate, collector, emitter, output interface J of the first dual-channel IGBT driver board 4 、J 5 、J 6 Connect the tube group Q of the bridge arm C of the IGBT module H-bridge inverter 3 n gate, collector, emitter, output interface P of the second dual-channel IGBT driver board 1 ,P 2 ,P 3 Connect the tube group Q of the bridge arm B of the IGBT module H-bridge inverter 2 Gate, collector, emitter, output interface J of the second dual-channel IGBT driver board 1 、J 2 、J 3 Connect the tube group Q of the bridge arm B of the IGBT module H-bridge inverter in sequence 2 n gate, collector, emitter, output interface P of the second dual-channel IGBT driver board 4 ,P 5 ,P 6 Connect the tube group Q of the bridge arm D of the IGBT module H-bridge inverter in sequence 4 Gate, collector, emitter, output interface J of the second dual-channel IGBT driver board 4 、J 5 、J 6 Connect the tube group Q of the bridge arm D of the IGBT module H-bridge inverter in sequence 4 n gate, collector, emitter;

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