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Silicon carbide (SiC) power MOSFETs have been becoming a strong alternative to silicon (Si) technology in high-voltage, high-frequency, and high-temperature applications. Despite their growing market share, limited field information is available regarding the aging facts under thermal stress and long term reliability of discrete SiC MOSFETs. In this paper, discrete SiC devices are thermally aged through...
A GaN-on-Si power device is a strong candidate to replace power components based on silicon in high-end market for low-voltage applications, thanks to its electrical characteristics. To maximize opportunities of the GaN device in field applications, a package technology plays an important role in a discrete GaN power device. A few specialized package technologies having very lower stray inductance...
This paper presents an experimental measurement method to obtain the transient junction temperature profile of power semiconductor devices in surge current operations. Even though a few methods to estimate the device junction temperature have been reported, they are not focused on dynamic surge conditions or experimental measurements which are important for power conversion and protection equipment...
The on-state resistance Ron of GaN devices can be affected by charge trapping as well as temperature effects. For the reliable application of the devices it is useful to distinguish between these two effects and understand the cause of power losses. In this work, three state-of-the-art GaN power transistors are investigated. An obvious Ron increase by trapping occurs in the GaN normally-off devices,...
This paper presents an improved thermal equivalent circuit model which provides an accurate thermal and loss estimation for integrated power modules. Thermal analysis is a critical issue for power electronic systems, it estimates the thermal performance of power devices and enables a flexible converter design. Unlike the conventional thermal models, the modified analytical thermal model takes the...
Rotor eccentricity in permanent magnet synchronous motors (PMSMs) increases unbalanced magnetic pull and motor vibration resulting in accelerated aging of motor components. If eccentricity remains undetected, it can increase in severity, and increase the risk of stator-rotor contact, which causes forced outage of the motor and driven process. Detection of eccentricity currently relies on off-line...
This paper presents a demonstrator of a Lithiumion battery for automotive applications. A printed circuit board consisting of sensors, local memory elements, a digital signal processing unit and a communication interface is integrated into a Lithium-ion cell case. We demonstrate the mechanical and electrical feasibility of addressing and real-time monitoring of single Lithium-ion battery cells using...
Firefighter robot autonomy is important for fire disaster response robotics. SLAM is a key technology for the autonomy. We want to know if SLAM can be used in fire disasters. However, evaluating SLAM in an actual fire disaster is not possible because we cannot generate large fires in actual petrochemical complexes. In this study, we simulated a fire disaster, collected sensor data for different conditions...
The purpose of the paper is to add solutions to the recognition and transport of minerals copper mining in southern Ecuador, using tools that have MATLAB® and LabVIEW®. The algorithm developed in MATLAB® using the principles of image processing to segment and filters the same. Finally applies the theory of neuro-fuzzy for the recognition of the presence of copper in a rock that is modeled. Is important...
Communication and data transfer demands are growing fast in last few decades. In order to obtain higher data transfer, it is necessary to determine proper antenna placement in a wireless system. In this paper, we research propagation in tropical environment and L-Band frequency by conducting distance and high variation measurement at frequency 1.8 GHz and 2.4 GHz. The received power level decreases...
A vehicle parked in the open will experience an increase in temperature in the cabin that can rise quickly in blistering conditions. As a result, the temperature in the cabin will have a temperature difference with outside temperature up to 30 degrees Celsius, thus causing uncomfortable conditions for the driver or passenger if entered the cabin. By utilizing thermoelectric modules that work with...
The aim of this research is to assist the consumer to control the air conditioning load during the peak season. Demand side response model was applied to manage inside room temperature to keep comfortable for the consumer. A simulation study is illustrated the effect of demand side response model application for air conditioning in residential house in Makassar city. In this research there are three...
This paper presents the 100 kW air-cooled inverter design of a power train used for advanced high-lift systems in future aircrafts. To achieve additional high-lift during take-off and landing of a plane, air is blown out at the back flap of the wings using a turbo compressor directly driven by an electrical machine. Silicon Carbide (SiC) devices promise large savings in volume, weight and losses of...
In this paper, 150W multi parallel LDC system, different from integral type LDC system of the conventional electric vehicle is proposed. The high efficiency LDC system is designed by reducing the losses of the magnetic element and semiconductor element by lowering the rated capacity through power sharing. Also, LDC is designed as active clamp forward converter to reduce the loss caused by the reset...
For airborne electronic equipment, temperature is the most important factor affecting its performance, so it is very important to invest its dynamic temperature response process in a flight environment. By analyzing the heat exchange relationship between different devices in an electronic wing pod cabin, a temperature prediction method for electronic pod cabin based on the Random Vector Functional...
In this paper, effect evaluation on Electric double-layer capacitor (EDLC) based energy storage system installed at Seibu Shinjuku Line in Japan has been carried out. Regenerative-braking energy contribution is improved by adjusting voltage setting of start-charging and start-discharging. Proportional relationship of charged energy and ambient temperature is observed which could be depending auxiliary...
This paper deals with induction machines bearing failures detection and diagnosis using vibration and temperature signals. It proposes the use of a new Classical Mechanics-inspired Optimization (CMO) metaheuristic for data clustering. To ensure failure detection, transitions from a state to another is analyzed in order to form a transitional model between system states generated by the clustering...
FPGAs are very sensitive to their operating conditions which can induce runtime errors. To prevent timing errors, FPGA manufacturers propose static timing analysis tools to ensure that the application to be implemented in the FPGA will work correctly at the expected frequency. However, that static timing analysis is corner-based and is thus valid for a set of optimal or recommended operating conditions...
An analysis of variation of drain current (dID/dt) of silicon carbide (SiC) metal-oxide-semiconductor field-effect transistors (MOSFETs) in turn-on and turn-off under different temperatures has been performed in this paper. It is shown that the magnitude of turn-off dID/dt is temperature dependent and decreases with tempertature with a fixed supply voltage, load current and gate resistance. While,...
This paper aims at reliability assessment of power semiconductor in hybrid DC switch. Design considerations of reliability issues are explained. Specific focus is given to a temperature-based condition monitoring technique via thermo-sensitive electrical parameters. VCE, td(off), and dVCE/dt of IGBT are presented as the indicator of junction temperature and calibrated. Comparative experiments with...
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