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This paper investigates the implementation and the use of the sparse fast Fourier transform algorithm in the converter control of a variable speed drive. The algorithm is proposed due to the reduction in computational complexity compared to the conventional fast Fourier transform for the special case of sparse signals. After discussing the theory and a simulation model, experimental results obtained...
This paper investigates the Field Programmable Gate Array (FPGA) implementation of a Space-Vector Delta Modulation Current Controller (SV-DMCC) for three-phase Grid connected Converters (GcCs). The proposed SV-DMCC is synthesized in the stationary reference frame (α,β) based on the sliding mode theory. The applied voltage vectors are accurately selected in order to reduce the current errors on α and...
Recently, a few modular multilevel converter (MMC) projects were commissioned around the world. In some planning projects, the DC links are overhead lines, therefore the DC fault current limitation capability becomes a concern. The MMC using clamp double submodule (CDSM) topology can naturally limit the DC fault current and is a good option for those projects. From experience with previous projects,...
Motor control applications using small fast-spinning motors such as e-turbos, UAVs, surgical instruments and high-speed pumps, and the advent of SiC and GaN switching transistors, are driving a need for compact drives with high-frequency control loop updates. This paper describes a multi-axis motor and power control platform suitable for academic or commercial research and development. It includes...
This paper presents an algorithm to generate a smooth rotor angle from Hall signals. Hall sensors are widely used in BLDC motor applications to provide rotor information for phase commutation, but the low angle resolution provided results in torque ripple and reduced efficiency. While the raw angle cannot be used directly, the rotor angle generated with the algorithm can be used in vector control...
Renewable energy systems require real-time and distributed control architectures for achieving high performance levels both in steady-state operation and in transient conditions. Thus, command, control, monitoring and communication functions must be implemented using platforms like uCs, DSPs, or FPGAs. Structuring all the architecture is of fundamental importance when the system contains several and...
This paper presents an overview and experimental analysis of the MC SPWM techniques for single-phase cascaded H-bridge inverter. The multilevel power converters are an alternative to traditional converters known as “three-level converters”. The voltage waveforms and the related frequency spectra, which have been obtained by simulation analysis in Matlab-Simulink environment, are here reported for...
During the recent years, high-level synthesis (HLS) has gained traction as a viable alternative to traditional handwritten register transfer level code in describing digital systems. This has been attributed to the maturing of the HLS tools and improving quality of their results. However, most published applications are data path intensive as HLS offers good tools for loop optimization, such as pipelining...
A reconfigurable computing architecture based on Field Programmable Gate Array (FPGA) technology is implemented for the Electrical Capacitance Tomography (ECT) system. The ECT system is used to image the multi-phase flow when gas/liquid or solid/liquid phases occurs. In the ECT systems, an exhaustive computational image reconstruction algorithm has to vastly processed large amount of data. The software...
This paper presents an FPGA based synthesizable offline UAV local path planner implementation using Evolutionary Algorithms for 3D unknown environments. A Genetic Algorithm is selected as the path planning algorithm and all units of it are executed on a single FPGA board. In this study, Nexys 4 Artix-7 FPGA board is selected as the target device and Xilinx Vivado 2015.4 software is used for synthesis...
This paper deals with the usage of National Instruments LabVIEW and its dedicated control platforms in the field of Power Electronics and Drives (PED) control applications. Specific requests of the PED field are covered with respect to the Real-Time target, formally microprocessor, and the on-board FPGA. Paper is focused mainly on algorithm implementation and testing, as well as performance and resource...
One of the main keys for modern high efficiency power converters for traction applications is implementation of soft-switching technology. Moreover, its control technologies seeks to increase the power density with high frequency. However, this kind of architecture, involving high frequency resonance, is too complex for the real-time simulation with a limited bandwidth. This paper proposes a reduced-order...
The Switched Reluctance Machine is one of the most promising electrical machine in variable speed applications because of its intrinsic robustness and its fault tolerant capability. However, the performances of the machine are deteriorated when a defect affects the position sensor. This paper describes a sensorless control for the switched reluctance machine: two methods based on the characteristics...
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