Real Time Control of Power Electronic System using ARM Processor MV Pankaj Lahari M.Tech Power Electronics 13131D5202

Contents Introduction Work to be done Work done so far References 2 Real Time Simulation in a Power Electronics based System

Introduction ARM Processor is one of the most used controllers, its cortex version having many of a DSP’s features Its PWM module feature can be used for control signal generation of power electronic switches The control of switches can then be used for control of a wide range of power electronic converters or implement a dedicated power converter for real time modeling of a motor drive 3 Real Time Simulation in a Power Electronics based System

Work to be Done Programming the Controller for control signal generation Interfacing the plant or its realtime model and controller using an interfacing environment, LabVIEW’s myDAQ or CompactRIO 4 Real Time Simulation in a Power Electronics based System

Work Done so far Literature Survey [1] Howard James Slater on “ Real time emulation environment for digital control development” Ph.D. Thesis, New Castle University, U.K [2] Satish Rajagopalan “Real Time Digital Implementation of Power Electronic building blocks” M.S. Thesis, Iowa State University, Ames, IA USA,2000 [3] Y S Rao “Electrical Load Emulation using Power Electronic Converters”, Ph.D. thesis, IIT- Bombay, 2010, India Basic Programming of ARM7 Processor 5 Real Time Simulation in a Power Electronics based System

LS[1]: “ Real Time Emulation Environment for Digital Control Development” Abstract: A real time simulation of an Induction Motor Drive is built using a single mother board with multiple processor system, ie, multiple DSPs. DSP A, DSP B, DSP C are used for controller, motor real time simulation model and DAQ operations respectively. DSP A acts as the master while the others as slaves. DSP A executes the control algorithm and after writing the voltages produced by previous cycle to real and simulation systems, reads the new demanded values from user. The actual machine is thus replaced by a Virtual one, the real time model programmed in DSP B. Note LS - Literature Survey 6 Real Time Simulation in a Power Electronics based System

LS [2]: “Real Time Digital Implementation of Power Electronic building blocks” Abstract: Two major applications of Real Time Simulation are rapid control prototyping and hardware-in-the-loop simulation. Rapid control prototyping of the controller used for generation of control signals (required to turn on and off the power electronic switches) has been done using a DSP, F24DSP. The systems contains a DSP module, a power converter module, Interface electronics module, reusable load module, signal conditioning module (sensors, potential dividers etc) Note LS - Literature Survey 7 Real Time Simulation in a Power Electronics based System

L S [3]: “Electrical Load Emulation using Power Electronic Converters” Abstract: “Load Emulation” is used to generate dynamic and realistic environments required for testing purposes of a prototype/system. It is the concept of using a power electronic converter to mimic a variety of loads which could be a motor/ generator. L-C-L topology filter is used between the power grid/source VSI and the emulator inverter. A DSP and FPGA are used for digital control of load emulator. FPGA for generation of PWM signals to the emulator inverter and DSP for generating the reference currents to be drawn by the it. Note LS - Literature Survey 8 Real Time Simulation in a Power Electronics based System

Basic Programming of ARM7 Processor (LPC2148) Arithmetic operations and memory access (Load & Store) Programming Timer Programs with and without interrupts PWM programming with single duty cycle PWM programming with multiple duty cycles in a single channel (needed for single phase sinusoidal PWM) PWM programming with multiple cycles in multiple channels (needed for three phase sinusoidal PWM) X ADC Programming – in process 9 Real Time Simulation in a Power Electronics based System

References Charaabi, L.; Monmasson, E. ; Slama-Belkhodja, I.: “FPGA based real-time emulation of Induction Motor using fixed point representation” 34th Annual Conference of IEEE, Year 2008, Page(s): P.M.Menghal, A. Jaya Laxmi, Member, IEEE: “Real Time Control of Electrical Machine Drives: A Review” ;Power, Control and Embedded Systems (ICPCES), International Conference, Year: 2010, Page(s): ww.ocfreaks.com/tag/lpc2148/ LPC2148 datasheet 10 Real Time Simulation in a Power Electronics based System

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