DISEÑO DE TARJETAS DE COMUNICACIÓN PARA EQUIPO DSPACE MICROLABBOX 1202/1302

Abstract

In the context of hardware update from previous DS1103 and DS1104 platforms,PowerLab laboratory acquires a dSPACE MicroLabBox platform, demanding the designand development of two interface boards that allow communication by optic fiber betweenMicroLabBox and the inverters available at Powerlab, among others requirements. Internally,MicroLabBox contains the modules DS1202 (DSP) and DS1302 (FPGA), where the firststeps in understanding the platform cover the study of the programming tools of eachmodule, originating four user manuals, according to the first objectives of the project.An overview of the state of art of digital platforms in Power Electronics, showsan exponential growth in the processing capabilities of this devices; not just for morecomputational demanding schemes control, but also for the development of real time andvalidation tools, in the context of Hardware-In-the-Loop (HIL) simulations. Therefore, arisesthe motivation for verifying by experimental means, the potential of MicroLabBox and theinterface boards, in HIL applications. It is proposed to model and program an inductionmotor in real time in the FPGA, and a vectorial control scheme in the DSP; comparing thecontrol results of virtual model and real motor.From an exact modelling of induction motor, first (Euler) and second (Taylor) ordermethods are obtained. Then, both models are evaluated under fixed point (64 bits) andfloating point (32 and 64 bits) representations. 64 bits fixed point Euler model is chosen,and it is implemented on the FPGA. Next, a scheme of estimation and vectorial rotorfield oriented control is implemented in the DSP, debugged by the real time (RT) modelprogrammed in the FPGA.By an analysis of the MLBX features, it is identified the functionalities that are desiredto adapt, making an assignment of resources for both boards. This consider the proposalof essential circuits for conversion, adaptation and supplying stages. Mounted the boards, atest program is used for checking all the operating points of the circuits and its components,comparing the measurements with calculated values.In the final experimental stage with the test bench, the performance of the boards isevaluated in low voltage, controlling the current in a RL load. Verifying the correct trackingof references, the next step considers the mechanical tests with the induction machine.First, the machine is magnetized to its nominal values, proceeding then with reversal speedmaneuvers. The comparison of mechanical and electrical variables shows minimal differencesbetween real and virtual results, confirming experimentally the RT model and the operationof interface boards; concluding the success of hardware and software development, provingthe operation of MicroLabBox as a control platform, as well as HIL simulation platform.