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The following topics are dealt with: semiconductor devices and packaging; control of power converters; electrical machines and actuators; motion control; robotics and adjustable speed drives; power electronic systems; measurements and sensors; electromagnetic compatibility; power electronics in transportation; mechatronic systems; electrical energy generation transmission and distribution; renewable...
The electrical energy consumption continues to grow and more applications will be based on electricity in the next decades. We can expect that more 60 % of all energy consumption will be converted and used as electricity. It is a demand that production, distribution and use of electrical energy are done as efficient as possible. Further, emerging climate changes argues to find future solutions which...
METI is aiming at highly electrified society to reduce CO2 emission by half in 2050. In the society, power electronics has to be used ubiquitously for efficient and effective usage of electricity. Role of innovated Power electronics; green electronics, is surveyed from the various points of view. It is confirmed that use of electrical power makes a low CO2 emission society possible with introduction...
Advantages of operating a Permanent Magnet Synchronous Machine (PMSM) without a position sensor are many and are well known. This paper presents a study of the effects of space harmonics in the incremental inductances and their impact on the machine saliency. The effects of space harmonics exclusively due to the machine (i.e., the saturation saliency distribution) are given particular consideration...
If a Predictive Torque Controller neglects the saliency of a machine the resulting prediction error contains the rotor angle information. A scheme to extract this information is derived in linear theory and extended for the nonlinear effects of a real reluctance synchronous machine. Measurement results confirm that this saliency based approach without signal injection is able to operate in the entire...
The paper describes an extended mechanical observer structure in combination with an enhanced voltage model for sensorless control of permanent magnet synchronous machines (PMSM) in the whole speed range. The observer estimates rotor speed, rotor angular position and load torque. An occurring deviation of both components; the estimated rotor position and the estimated speed, is fed back to the voltage...
The paper will deal with the potentials of two Surfaced-mounted PM type rotors, namely Inset rotor and Ringed-pole rotor for shaft position sensorless drives. For both the configurations, motor equations are given and discussed. In particular estimation of the rotor position based on high frequency voltage injection is described and merits and drawbacks pointed out and compared. Simulation and experimental...
This paper presents a testing system for power converters control units. A hardware-in-the-loop test bench is designed for assessing control unit performances. A photovoltaic generator, coupled with a boost circuit, is software-simulated within a real-time environment, RT-Lab and coupled in closed loop with the physical control unit to be tested.
Recently, Matrix Converter (MC) has attracted the interest of the scientific community. Due to the complexity of its control, simulation of this converter is a time consuming task. In this work, an FPGA based MC model is presented, allowing the simulation of a detailed MC in real-time.
The objective of this work is to analyze the dynamic behavior of a generator which uses a grid-connected inverter with an output LC filter. In this paper, we focus on modeling and simulating this kind of inverter using real time simulation. A control strategy based on resonant controller is proposed. State feedback structure and pole assignment methods are used to design the controller. To test this...
The numerical simulation of power and electromechanical systems necessitates sub-microsecond calculation timesteps if the considered system is characterized by low time constants. Migrating the computational load to an FPGA have shown to suit well the real-time simulation needs of such systems. However, many challenges remain to concretize the broad adoption of FPGA technology for the real-time simulation...
In order to implement magnetic guidance in a long primary linear motor, the measurement of the airgap and yaw angle is required. Usual gap sensors deliver the signal and require power supply in the moving part. In this case, a power and data transmission system is necessary between the mover and the stationary controller. In addition to the magnetic guidance, a new type of capacitive sensor system...
This paper attempts to provide analytical tools to facilitate the analysis and design of flat permanent magnet linear machines. First, a 2D exact analytical solution of magnetic field distribution in a actual geometry of a flat type permanent magnet linear machine is established. The developed model is then used to estimate resistance limited eddy current in armature windings and permanent magnets...
This paper presents the analyses of thrust and normal forces of linear induction motor (LIM) segments which are implemented in a rotating ring system. To obtain magnetic levitation in a cost effective and sustainable way, decoupled control of thrust and normal forces is required. This study includes the design of a static test setup from which the measurement results are compared and verified with...
Despite of announcing the first SMC material by Höganäs AB, Sweden in 1994, only a few applications exist so far. In this paper design rules are presented exemplarily for a tubular and a long stator linear drive increasing the knowledge how to apply SMC. Additional measurements underline the high potential of this material group.
This paper concerns the comparison of three linear reluctance actuators and four voice coil actuators for high-precision applications. The short-stroke actuators with reasonably low variation of the force are optimized on actuator mass and power dissipation. For actuators with a significantly high force variation, the configuration is modified with the objective to improve the actuator properties...
This paper proposes a mathematical model for photovoltaic panels (PV) in the range 10-25 V with approximately 50 W of power generation and an open-circuit voltage below 25 V. Mathematical models of PV are presented, compared and verified against experimental measurements on a photovoltaic set-up. This shows the advantage of mathematical modeling of photovoltaic panels to achieve maximum power by maximum...
The paper deals with a study of new synchronous machine for use in hybrid vehicle. The synchronous machine is projected as permanent magnet synchronous motor with outer rotor embedded into rear rim of a bus. The main target of the study is design of an air self-cooled hub-wheel PMSM from electromagnetic point of view and using finite element analysis of electromagnetic field and thermal distribution...
Mathematical model of separately excited DC motor is featured by transfer function. Searched parameters are motor gain coefficient and motor time constants. Offline identification algorithm is based on minimization of criteria function where searched variables are parameters of the mathematical model. The minimization algorithm is the Nelder-Mead simplex search method of the MATLAB program.
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