Research On Power Electronic Control Platform Based On OMAPL138+Spartan6

With the rapid development of modern power electronic technology,the performance of power electronic system is constantly improved,and the structure is becoming more and more complicated and diversified,which puts forward higher requirements for power electronic control platform.However,the existing power electronic control platform can only be used for a certain type of power electronic system,which is difficult to reuse.In order to shorten the research period of power electronic control platform and avoid the disadvantages of redesigning the control platform every time,this paper designs a power electronic control platform that can be reused and expanded for common power electronic systems.In order to improve the hardware reusability of power electronic control platform,the characteristics of common power electronic systems are analyzed,and the general principles of power electronic control platform design are summarized,including the requirements of hardware interface resource types,core processor computing ability and communication ability.According to the requirements,the specific selection of core processor is determined as dual-core digital signal processor(DSP)OMAPL138.The control software of the power electronic control platform also needs to be reused.The power electronic control software is classified,and the software modules suitable for reuse are selected.The software is modularized in the form of encapsulation function on DSP software platform,and the power electronic control software is modularized in the form of IP core on FPGA software platform.At the same time,the software design of this paper is based on embedded real-time operating system,using the operating system can reduce the difficulty of dual-core DSP program development and debugging,also increase the portability of the application program.Considering the hardware expandability of power electronic control platform,DSP has limited hardware resources and fixed functions,so its expandability is limited.Therefore,the field programmable gate array(FPGA)with high design flexibility is proposed as the programmable and configurable expansion interface of the control platform,and the dualcore master control architecture of DSP+FPGA is finally determined.The overall hardware design of the power electronic control platform is proposed,including the minimum reusable system,communication interface module,AD sampling module,DA output module and digital signal input and output module.Finally,the design of power electronic control platform should be reflected in specific applications.The power electronic control platform designed in this paper adapts to different complex power electronic systems by connecting multiple reusable 16-bit eight-channel AD modules,12-bit four-channel DA modules and configuring FPGA’s GPIO as a PWM channel.After verifying the basic functions of the power electronic control platform,it is used to control the H-bridge cascade inverter and the magnetic levitation displacement system respectively.The experimental results prove the rationality of the software and hardware design of the power electronic control platform.