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Iron loss measurement has always been a concern for the engineers designing electrical machines. A novel test method developed for fast and accurate measurement of iron losses of permanent magnet synchronous machines and a dedicated laboratory system for performing automatic measurements are presented. The principle of the measurement technique, the main building blocks of the laboratory system and...
Water-level sensors are indispensable for monitoring the level of water in storage tanks, which are used in drinking water distribution networks. In this paper, a long-range capacitive-type water-level sensor is presented. The proposed sensor is constructed using widely-available multilayer tubes, which are used for building drinking water systems. Thus, both the manufacturing cost of the sensor and...
This paper presents coupled thermal and electrical modeling for a ONAN distribution transformer. Thermal model based on the IEC 60076-7 standard will lead to estimate the oil temperature of the transformer. Thermal parameters are determined using Levenberg/Marquardt algorithm. Electrical model based on KAPP model will determine the transformer leakage resistance and inductance evolutions. Variations...
The improvement of methods to harvest the energy produced by a Microbial Fuel Cells is receiving growing attention from the scientific community. The motive is related with the possibility to join the wastewater treatment process with the production of energy. This last process is strongly dependent from several biochemical parameters that can affect the energetic efficiency of the MFC. The experimental...
Microfluidic thermal treatment of seawater is a novel concept in the evaluation of the prevalence and stability of some fractions of dissolved organic matter in the aquatic environment. In this paper a microfluidic system is described which can implement this treatment and which is build using a low cost micro fluidic technology based on printed circuit boards. The technology and the production are...
This paper discusses the suppression of temperature change in air springs used for an ant-vibration apparatus. The thermal equivalent circuit, which corresponds to the heat transfer of the air springs, are employed for the evaluation of the temperature change. Based on measurement results of the temperature change and the circuit, four methods are proposed so as to suppress the temperature change...
In this communication we study the accuracy of an acoustic positioning system operating in a robotic cell, and working in sequential (Time-Division Multiple Access, TDMA) and simultaneous (Code-Division Multiple Access, CDMA) operations. In normal room conditions, and operating in TDMA mode with 7 acoustic beacons and 32 bits long binary phase modulated signals, the system achieves a location accuracy...
In a first stage a cancer promotes an intense process of vascularization at the affected area increasing blood flow and modifying the local temperature of the body. Using a thermal camera, the infrared radiation emitted by the human body can be captured and then used in the measuring of body temperature, turning the results into an image. Moreover, thermography can detect suspicious regions in patients...
The non-dispatchable, intermittent and unpredictable nature of photovoltaic energy has made its integration in power system very limited. This paper presents a system for monitoring, supervising and treatment of the information in real time applied to photovoltaic plants connected to the grid. Experimental results shows the usefulness of the system implemented for monitoring a grid-connected photovoltaic...
Low range differential air pressure sensors are used widely in various applications. In this paper the effects of temperature change on transient behavior of the calibration setup for differential air pressure sensors, due to temperature gradient are analyzed. A high performance reference setup utilizing ideal gas law, for differential air pressure sensors, is selected for experimental analysis. The...
Measuring complex for analysis of recombination deep traps in semiconductor solar cells based on the I-DLTS is described. Measuring complex can be used in the industry of semiconductor solar cells where is necessary to control deep traps concentration and required level of conversion efficiency and quality of solar cells.
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