The Design And Implementation Of Airborne Three-phase Power Factor Corrector

Aiming at the actual requirements of the equipment system for high-reliability threephase power factor corrector,the three-phase power factor correction technology and its application under airborne conditions are the main research objects.Based on an in-depth analysis of current power factor correction theory and technical principles,this subject intends to carry out research on efficient digital control power factor correction technology for three-phase voltage input and complete the design of the three-phase power factor corrector.Three-phase power factor correction technology,power supply digital control technology,two-stage cascade topology design technology,and ultra-high power density design technology are investigated.1.Research high-performance and high-reliability power factor correction topology,and design a three-phase six-switch step-down power factor corrector + interleaved boost DC / DC converter that can adapt to a wide input AC voltage range,high efficiency,and low harmonics The two-level structure topology meets the airborne output voltage level,solves the problem of inrush current,reduces the complexity of the overall system design,reduces the circuit size and improves circuit reliability.2.The digital control power factor correction algorithm is researched.In order to meet a wide frequency change range,the SPWM method is adopted to achieve high power factor and low harmonic effects for different input AC voltage frequencies.The control method is simple,reduces complexity,and facilitates digital implementation.3.High power density research technology,the circuit has a small size,large output power,and high efficiency requirements.In order to ensure system reliability,the circuit heat dissipation design also needs to be analyzed.Magnetic components are an important part of the circuit,and its volume also directly affects the degree of integration of the circuit.Therefore,the heat distribution of the circuit,heat dissipation measures,and design of magnetic components need to be studied.4.Study the high-performance direct digital parallel current sharing technology.In order to meet the system’s high current load and redundant backup requirements,this power module must have a parallel current sharing function.In order to ensure the equal distribution of the output current of each power module,each module has the same current stress and thermal stress,and the reliability of the system is enhanced.Therefore,the parallel current sharing technology of multiple modules needs to be studied.In order to verify the correctness and feasibility of the research,a power factor correction module is designed that can meet the requirements of high power density,high integration,and adapt to a wide range of input voltage range and low harmonic components of current,which output power is 1500 W,power factor is 0.99,efficiency is greater than 0.94.