Design And Research Of A New Intelligent Power Distribution Control Module

Solid State Power Controller(SSPC)is a kind of semiconductor power device based on MOSFET,IGBT,etc.It has power switching capability and overcurrent protection.It is an important part of intelligent power distribution system and is widely used in aviation.Intelligent power distribution and control fields such as aerospace and weapons.The existing solid-state power controller is a customized product.In order to meet the requirements of standardization,generalization and miniaturization of the model system,the generalization and integrated design of the solid-state power controller has become the focus of the next step.Based on the function of the existing solid-state power controller,this paper takes FPGA as the development platform and the engineering development of the new intelligent power distribution control module as the application background,and explores the design ideas and methods to realize the generalization and integration.Based on the current development status of solid-state power controllers,further generalization and integration can be carried out in three aspects: modularization of functional circuits,standardization of external structure,and integration of sequential logic circuits.The new intelligent power distribution control module has carried out research and design work with the aim of these three aspects.The soft core based on FPGA development has strong portability,allows users to self-configure,and has obvious advantages in parallel processing with respect to chip FPGAs such as MCU and DSP.Therefore,FPGA is used as the core device of intelligent power distribution control module,and other functional circuits are used.Modular design around the FPGA unit.In the design process,the common design schemes of each module circuit are integrated,and the design of each module circuit is optimized after the comparison of each scheme and the specific use requirements.According to GJB/Z1391-2009 reliability analysis,through the failure mode,impact and hazard analysis,identify the weak links,and adopt redundant design and derating measures to reduce the risk of failure.Finally,the reliability prediction method is used to evaluate the reliability of the intelligent power distribution control module.Finally,with reference to the testing requirements of the electromagnetic compatibility project,targeted circuit optimization was carried out.Compared with the existing solid-state power controllers,the shape is not uniform,and the new intelligent power distribution control module adopts the standard structure of the standard CPCI board to meet the general requirements of the shape.The composition and corrosion resistance of commonly used materials were analyzed in detail,and materials meeting the requirements for military environment use were selected.Follow the principles of electromagnetic compatibility design and develop the design of the outer casing and printed board.The strength and thermal analysis of the solid-state power controller were performed by ANSYS software simulation method to verify the strength and heat dissipation performance of the structural design.The integrated parts of the sequential logic circuit are short-circuit overcurrent protection and CAN bus controller.Overcurrent protection is based on the thermal tripping principle of the circuit breaker,combined with an inverse time protection algorithm.The design of the CAN bus controller refers to the working principle and register configuration of the mature independent CAN bus controller SJA1000,and is designed according to the standard of CAN communication.The software was designed based on the Libero IDE software suite developed by Actel for module modeling,simulation and synthesis.According to the above ideas,the engineering of the new intelligent power distribution control module was carried out.The insulation test,functional test,random vibration test,temperature rise test,and electromagnetic compatibility test were carried out according to the expected objectives.The above test and test results show that the design The new intelligent power distribution control module realizes the expected design index and realizes the generalization and integration of the existing solid-state power controller to a certain extent.