Feasibility study of the bandwidth expansion for MACKEY S1 type with a short-circuit board

Abstract With the increase in the use of electronic devices in many different environments, a need has arisen for an easily implemented method for the rapid, sensitive detection of liquids in the vicinity of electronic components. In this work, a high-performance power generator that combines carbon nanoparticles and TiO2 nanowires has been fabricated by sequential electrophoretic deposition (EPD). The open-circuit voltage and short-circuit current of a single generator are found to exceed 0.7 V and 100 μA when 6 μL of water was applied. The generator is also found to have a stable and reproducible response to other liquids. An output voltage of 0.3 V was obtained after 244, 876, 931, and 184 μs, on exposure of the generator to 6 μL of water, ethanol, acetone, and methanol, respectively. The fast response time and high sensitivity to liquids show that the device has great potential for the detection of small quantities of liquid. In addition, the simple easily implemented sequential EPD method ensures the high mechanical strength of the device. This compact, reliable device provides a new method for the sensitive, rapid detection of extraneous liquids before they can impact the performance of electronic circuits, particularly those on printed circuit board.

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Implementation and Experimental Verification of Smart Junction Box for Low-Voltage Automotive Electronics in Electric Vehicles

Applied Sciences ◽

10.3390/app10072214 ◽

2020 ◽

Vol 10 (7) ◽

pp. 2214

Author(s):

Sang Wook Lee ◽

Soo-Whang Baek

Keyword(s):

Electric Vehicles ◽

Printed Circuit Board ◽

Pulse Width Modulation ◽

Low Voltage ◽

Short Circuit ◽

Circuit Board ◽

Area Network ◽

Automotive Electronics ◽

Overload Protection ◽

The Impact

In this study, we designed and implemented a smart junction box (SJB) that was optimized for supplying power to low-voltage headlights (13.5 V) in electric vehicles. The design incorporated a number of automotive semiconductor devices, and components were placed in a high-density arrangement to reduce the overall size of the final design. The heat generated by the SJB was efficiently managed to mount an Intelligent Power Switch (IPS), which was used to power the headlights onto the printed circuit board (PCB) to minimize the impact on other components. The SJB was designed to provide power to the headlights via pulse width modulation to extend their lifetime. In addition, overload protection and fail/safe functions were implemented in the software to improve the stability of the system, and a controller area network (CAN) bus was provided for communications with various components in the SJB as well as with external controllers. The performance of the SJB was validated via a load operation test to assess the short circuit and overload protection functions, and the output duty cycle was evaluated across a range of input voltages to ensure proper operation. Based on our results, the power supplied to the headlights was found to be uniform and stable.

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Feasibility study of acoustic signals for on-line monitoring in short circuit gas metal arc welding

International Journal of Machine Tools and Manufacture ◽

10.1016/j.ijmachtools.2003.10.016 ◽

2004 ◽

Vol 44 (5) ◽

pp. 555-561 ◽

Cited By ~ 55

Author(s):

Ladislav Grad ◽

Janez Grum ◽

Ivan Polajnar ◽

Janez Marko Slabe

Keyword(s):

Feasibility Study ◽

Arc Welding ◽

Short Circuit ◽

Gas Metal Arc Welding ◽

Acoustic Signals ◽

Metal Arc Welding ◽

On Line

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Feasibility Study GaN Transistors Application in the Novel Split-Coils Inductive Power Transfer System with T-Type Inverter

Energies ◽

10.3390/en13174535 ◽

2020 ◽

Vol 13 (17) ◽

pp. 4535

Author(s):

Viktor Shevchenko ◽

Bohdan Pakhaliuk ◽

Oleksandr Husev ◽

Oleksandr Veligorskyi ◽

Deniss Stepins ◽

...

Keyword(s):

Feasibility Study ◽

Wireless Power Transfer ◽

Simulation Software ◽

Circuit Board ◽

Transfer System ◽

Power Transfer ◽

Wireless Power ◽

Inductive Power Transfer ◽

Wireless Power Transfer System ◽

Inductive Power

A promising solution for inductive power transfer and wireless charging is presented on the basis of a single-phase three-level T-type Neutral Point Clamped GaN-based inverter with two coupled transmitting coils. The article focuses on the feasibility study of GaN transistor application in the wireless power transfer system based on the T-type inverter on the primary side. An analysis of power losses in the main components of the system is performed: semiconductors and magnetic elements. System modeling was performed using Power Electronics Simulation Software (PSIM). It is shown that the main losses of the system are static losses in the filter inductor and rectifier diodes on the secondary side, while GaN transistors can be successfully used for the wireless power transfer system. The main features of the Printed Circuit Board (PCB) design of GaN transistors are considered in advance.

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Nondestructive Visualizations of Short Circuits in Ball Grid Arrays by Magnetic Field Imaging and Three-Dimensional X-Ray Microscopy

ISTFA 2016: Conference Proceedings from the 42nd International Symposium for Testing and Failure Analysis ◽

10.31399/asm.cp.istfa2016p0609 ◽

2016 ◽

Author(s):

Kazuhiro Suzuki ◽

Masayoshi Tsutsumi ◽

Masako Saito ◽

Makoto Toda ◽

Kouzou Yamamoto ◽

...

Keyword(s):

Magnetic Field ◽

Short Circuit ◽

Three Dimensional ◽

Optical Beam ◽

Circuit Board ◽

Reconstruction Method ◽

Resistance Change ◽

X Ray ◽

Magnetic Field Imaging ◽

Field Imaging

Abstract It is important to locate a short circuit failure in semiconductor devices, and powerful tools such as lock-in thermography and optical beam induced resistance change are used. However, those tools are inappropriate for investigating the device covered with the impenetrable substance to light, because the covering substance blocks the light from the defect point in the device and also prevents the optical beam from outside of the device. We demonstrate that a subsurface short circuit in a ball grid array device can be located by magnetic field imaging (MFI) and the electromagnetic field reconstruction method (EM-FRM), which makes it possible to calculate a magnetic field in the immediate vicinity of the current that is the source of the field from a measured magnetic field at a distance. Moreover, we visualize the short circuit by three-dimensional X-ray microscopy. MFI is also applied to visualization of a magnetic field created by a current flowing inside a printed circuit board and a light emitting diode package.

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Corrosion Measurement of the Atmospheric Environment Using Galvanic Cell Sensors

Sensors ◽

10.3390/s19020331 ◽

2019 ◽

Vol 19 (2) ◽

pp. 331

Author(s):

Daiming Yang ◽

Hongwei Mei ◽

Liming Wang

Keyword(s):

Epoxy Resin ◽

Printed Circuit Board ◽

Lower Layer ◽

Short Circuit ◽

Salt Spray ◽

Middle Layer ◽

Galvanic Cell ◽

Circuit Board ◽

Atmospheric Environment ◽

Printed Circuit

An atmospheric corrosion monitor (ACM) is an instrument used to track the corrosion status of materials. In this paper, a galvanic cell sensor with a simple structure, flexible parameters, and low cost was proposed for constructing a novel ACM, which consisted of three layers: the upper layer was gold, used as the cathode; the lower layer was corroded metal, used as the anode; and the middle layer was epoxy resin, used to separate the cathode and anode. Typically, the anode and epoxy resin were hollowed out, and the hollow parts were filled with electrolyte when it was wet to form a corrosive galvanic cell. Specifically, the corrosion rate was obtained by measuring the short circuit current of the cell. The sensor was made of a printed circuit board (PCB) or flexible printed circuit (FPC) and a metal coupon, which allowed for early control of the electrical parameters (including sensitivity and capacity) and could be combined with various metals. Additionally, the sensor feasibility was studied in water droplet experiments, during which the corrosive current changed with the electrolyte evaporation. The sensor practicability was also verified in a salt spray test, and the electric charge was compared using the thickness loss of bare coupons. A contrast test was also conducted for the corrosivity of different sensors made of aluminum, iron and copper.

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