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The proposed modulation technique, harmonic cancellation, aims to reduce the output voltage THD in AC power supplies generated by means of an inverter, when they are supplying non linear loads. Its operating principle is grounded in the proper pre-distortion of the inverter output voltage. It means that the inverter must generate a specified fundamental component and some controlled harmonics, which...
A matrix converter is an electricity converter to operate direct conversion of variable voltage variable frequency (VVVF) without DC link part. Some applied examples of motor drives by the matrix converter are shown [1]. This paper presents basic characteristic of parallel-connected dual induction motor drives with the matrix converter. Purposes of this system are low cost and saving space in the...
Small signal modeling of power converters is important for analysis, fast simulation and control design. The small signal modeling based on state-space averaging method has been widely used for PWM converters since the ripples are small in the inductor current or capacitor voltage. The model becomes less accurate from the real circuit if the ripple is not ignorable. In a resonant circuit, the inductor...
In low-power electronics, achieving a high energy efficiency has great relevance. Nowadays, global asynchronous local synchronous systems enables to use a local dynamic voltage scaling architecture, this technique allows achieve a high energy efficiency. Moreover, local dynamic voltage scaling can be implemented using different approaches. One of them is Vdd-Hopping technique. In this paper, different...
The paper deals with basic philosophy and structure of remote controlled laboratory for experimentation in electrical engineering. PEMCWebLab project provides the user with a practical experience in industrial electronics education. It is designed based on leading ideas and has clear targets. In this paper laboratory for the course motion control is introduced. First of all description of the system...
Literature reports a growing number of successful case scenarios of simulators or training tools in the industrial control and automation area. Considering the learning environment in the industrial automation area, which is a complex area that may lead to ambiguous and in many cases unfair evaluation methods, it is essential to implement an evaluation system that enables teachers to identify the...
In this paper we describe an Internet accessible robot control laboratory, providing remote trajectory planning and execution for a SCARA robot. The laboratory provides students with hands-on experimental experience with a robotic manipulator. The system is based on client-server TCP/IP architecture. The server-side system, running on an ultimodule embedded platform, controls the 4DOF SCARA robot...
To decrease the number of clamping diodes and flying capacitors in multilevel inverters, a novel multilevel inverter topology with no clamping diodes and flying capacitors is proposed in the paper. The topology structure, operating principle, balance of the DC link capacitor voltages, and comparisons with the conventional multilevel topologies will be discussed. The number of power switching devices...
The challenge of integrating heterogeneous systems in order to combine their functionality is of utmost importance for the further deployment of building automation systems. The goal is to allow comprehensive communication among the systems. This will provide enhanced possibilities thus making way for intelligent buildings. Traditionally, integration is achieved using gateways which require considerable...
Internet based demand and supply control system is expected as an effective solution for saving fossil fuels by controlling power consumption automatically with taking account of environmental information. KNIVES is one of this systems and it uses distributed and cooperative power control algorithm. In 2007, the latest prototype of KNIVES has been developed and be operated so as to evaluate in real...
This paper presents an upper MAC protocol based on a centralized master multi-slave architecture which is used to coordinate communications among the different type of nodes required for an indoor localization system (ILS) based on IEEE 802.15.4. This protocol works for the non-beacon enabled mode of the referred standard and is used to avoid additive delays in the localization communications. The...
The implementation of a neighborhood electric vehicle with two independent wheel drives is presented. An electronic differential control is carry out by using two independent field-oriented controlled induction motors. Industrial standard induction motors were rewound to operate with low voltage (28 Vrms), while maintaining the original motor power. Two three-phase MOSFET inverters were built for...
This paper proposes a novel algorithm to detect information of time delay and inertia errors of the nominal model in the disturbance observer. The proposed method adopts the hidden Markov model to relate the states causing disturbances with the observed disturbances. Output distribution of the hidden disturbance state can be defined based on the relationship between the observed disturbance and time...
We present a hardware-directed robotic exploration algorithm for an indoor environment in this paper. The robot is equipped with eight ultrasonic sensors. The algorithm has optimal (linear) time complexity. An important feature of the algorithm is the acquisition of distance information by the eight sensors in parallel. A novel architecture based on content addressable memory (CAM) has been developed...
A new, the torque and speed sensorless induction motor control is proposed, analyzed and experimentally verified in this paper. The control is based on stator and rotor flux as state variables. This choice of state variables allows a graphical representation which is transparent and insightful. A speed sensorless implementation of the control is demonstrated experimentally for low speed operation...
This paper investigates the numerical issue of a discrete-time induction-motor emulator implementation. The stability analysis of the finite-word length implementation shows a coupling between required word length and the sample rate. We propose specific guidelines to analyze this coupling and to estimate the required data word length for both signals and coefficients of the model. To respect algorithm...
This paper presents the implementation of a system on chip (SoC) controller for a synchronous machine using a fusion field programmable gate array (FPGA). This component integrates, in addition to an FPGA matrix, analog peripherals such as, analog to digital converter (ADC), analog prescalers and an analog multiplexer for multi-channel conversion. Thus, in such application and in order to improve...
This paper presents an application control strategy for controlling the input current and DC link voltage of a single-phase voltage-doubler boost PFC (power factor corrector) implemented by FPGA. A sample of the input voltage, or any other current reference, is not necessary, since it is naturally used as reference for the current loop, through the power circuit. The model is more accurate, presenting...
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