This project is concerned with the failure analysis of electrical machines which is still an challenging factor in the industrial environment.
This Project is concerned with the statistical failure analysis of outdoor insulation,which is still an challenging factor in power system.
In this project the developement of circuit breaker for detecting the short circuit fault of element conductors in power cord system is verified.
The main aim is to identify the long term reliability of polymeric insulating materials.
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Mizuno Laboratory,
Nagoya Institute of Technology
Gokiso-cho, Showa-ku, Nagoya,
Building number 6, Room number : 314
Aichi, 466-8555 Japan.
052-735-5439
mailmizunolab@gmail.com
University Website English
Department Website English
In this world, every engineers dream is to get into new challenge in their field and get success out of it. In this way, Mizuno Laboratory has created a huge confidence and self-motive to achieve any engineer goal. They have their own space for research and development, marketing and exploration. In Mizuno Laboratory, we have an opportunity to get collaborated with the people of countries. One of the important thing that will create a buzz among all to get into Mizuno Laboratory is, that they are creating a good bond with the company people and also letting us to create our own idea and get into real world. Hence it will be a platform for a better today, a better tomorrow.
In general, most of the modern industrial environment are driven by the electrical machines especially induction motors. This is due to the various advantages like easy handling, low cost, high reliability, robustness and the availability of the power converters makes the induction motor as most suited for the industrial application. As the application of induction motor in industrial environment gets increased, it is necessary for the induction motor to get operated with proper maintenance management and control monitoring. By this reason, the fault diagnosis of the induction motor has received an intense interest. In last couple of decades, numerous researches are undergoing for detecting the fault in the induction motor. In our laboratory we are dealing with the reliability analysis and diagnosis of the induction motor. As a basic classification, machine failure can be categorized as bearing damage, stator damage, rotor damage and some other minor failure damage. Till today, we have proceeded our research towards the bearing fault, rotor bar fault and short circuit fault in the induction motor.
For better reliability control and diagnosis, more experimental verification and evaluation is necessary in the field of fault diagnosis of induction motor. As the failure analysis is still existing challenging factor in the industrial environment, we would like to proceed our research with the scope that the obtained result will lay as the step mark to proceed further. To begin the journey with multiple bearing fault analysis and inherently, till now we have a diagnosis method that either identify the fault in the stator or rotor. But in our laboratory we are trying to do an investigation for a common diagnosis method that would identify both the fault in the stator as well as rotor. This would be a challenging factor and if it came into existence, this would be world first discovery of identifying both the stator fault and rotor fault at the same time. Also we are concentrating on the single phase rotation test (Identifying the number of broken rotor bar), deterioration of the stator current .With the lot of research work and hard work, our laboratory would like to continue the journey towards the success of the research. Towards the bridge, making a way for electrical machine.
Probabilistic Assessment of failure in the outdoor insulation is still a challenging factor in this world. A probabilistic approach to flashover risk for any particular voltage transmission line insulation is getting the research work in our laboratory. These are carried out by treating flashover voltage, contamination severity and surface wetting as variables. The flashover risk of insulators is evaluated under several conditions paying attention to flashover probability function, surface wetting and contamination. Our hope is to get a better solution to the outdoor insulation failure so that its reliability can be controlled.
The traditional design against insulator contamination has been made by the so-called deterministic method. The maximum contamination severity is assumed first. Then, a certain margin is taken into account based on experience between the withstand voltage obtained from an artificial test in laboratory and the target operating voltage. With the lot of research work and hard work, our laboratory would like to continue the journey towards the success of the research.
On a classification, unintentional arc discharge caused by short-circuit of element conductors in power supply cords with electrically and/or mechanically damaged electrical insulation can lead to fire accidents. It is difficult to detect this type of short-circuit with a conventional circuit breaker installed in a distribution panel, because the duration of arc discharge is rather short and the magnitude of the short-circuit current is smaller than the threshold value required for operation of the breaker. A hazard prevention system is strongly required in residential areas and plants. In our laboratory, we are aiming at promising detection design for this kind of arc discharge based on features extraction. From this we can characterize the distortion of voltage waveform at the time of arc discharge.
We all know that one of the main causes is short-circuit, which is observed in power supply cords of the household appliance and extension cords with electrical insulation damaged electrically and/or mechanically. Suppose if the disconnected element conductors are in contact for some reason, short-circuit occurs and resulting arc discharge sometimes leads to a fire accident. It is difficult to detect this type of arc discharge followed by short-circuit of element conductors in a power supply cords with a conventional circuit breaker installed in a distribution panel, which is mainly designed to operate for short-circuit of interior wiring. In light of this situation, development of a safety device based on a reliable arc discharge detection method is strongly requested socially for prevention of unintentional fires. The Mizuno laboratory have started their research to develop a wall outlet incorporated with a detection circuit of arc discharge and a circuit breaker. Now in present, the research work is carried for the development of the circuit breaker for detecting the short circuit faults of element conductors in power cord system. With the lot of research work and hard work, our laboratory would like to continue the journey towards the success of the research.
In last few decades, lots of composite insulators have been installed in power systems. Silicone rubber is commonly used as shed material of composite insulators, which has a number of advantages like lightweight, easy handling, hydrophobicity on its surface and so on when compared over porcelain/glass insulators. However, deterioration of organic silicone rubber over time is unavoidable. It is a well-known fact that, when compared with arc discharge, partial discharge deteriorates silicone rubber more gradually, but its effect on degradation cannot be passed over. Inherently, for a better understanding of silicone rubber deterioration caused by the partial discharge, it seems more research is necessary.
In Mizuno laboratory, the acceleration test results on partial discharge degradation of silicone rubber in artificial clean fog as well as in the atmosphere is undergoing. The analysis is carried out with respect to leakage current, contact angle and surface roughness in association with partial discharge degradation for various kinds of samples with different amount and treatment of additives (ATH and silica). Furthermore, the formation of acid by partial discharge was also in part for the case of clean fog With the lot of research work and hard work, our laboratory would like to continue the journey towards the success of the research.
Outing the difficulties of understanding two or three-dimensional displays of magnetic field distributions to figure out the magnetic field environment, it is necessary to consider a magnetic field mitigation method, if necessary. Measurement of magnetic field, as well as positioning of measuring points in space, has to be performed rapidly because the source current varies vigorously. This change in source current results changes in field distribution. As lot of research is needed in the field of magnetic field, our laboratory concerns with the high research level to target the magnetic field distribution. This encourage our members to start designing the novel visualization system of the low-frequency magnetic field generated by power facilities or electrical equipment. The system utilizes a skeleton tracking function of Kinect as a position determining method.
As researches on visualization of magnetic field by measurement have not been published markedly. It will be good if we have a magnetic field camera system for visualizing the magnetic field generated by various household appliances. In our laboratory we are focusing our research in the visualization of magnetic field distribution and its application. This may be useful in various industries regarding the reliability issues and will make a good solution for proper diagnosis. With the lot of research work and hard work, our laboratory would like to continue the journey towards the success of the research. Towards the bridge, making a way for magnetic field.
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"Teaching is a very noble profession that shapes the character,caliber,and future of an individual"
PROFESSOR
Department of Electrical and Mechanical Engineering
Nagoya Institute of Technology
Nagare college,Japan
High Voltage Insulation,
Superconducting Power Cable,
Electrical Insulation Diagnosis,
Fault Diagnosis of Electrical Machines,
Quantification of Power Frequecny Electric and Magnetic field.
CIGRE
Cyrogenic Association of Japan
Institute of Electrical Engineers of Japan - IEEJ
Institute of Electrical and Electronics Engineers - IEEE
Nagoya institute of Technology,
Gokiso-cho, Showa-ku, Nagoya,
Building 6, 3F-Room Number:314,
Aichi, 466-8555, Japan
052-735-5439
mizuno.yukio@nitech.ac.jp
"Continuation of Challenge"
Project Theme: Short Circuit Diagnosis in Power Cord
Member: Institute of Electrical Engineers of Japan-IEEJ
Hobby: Game, Cooking
Native: Osaka, Japan
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Project Theme: Short Circuit Diagnosis in Power Cord
Member: -
Hobby: Reading, Game
Native: Aichi, Japan
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Project Theme: Outlet Plug Tracking Phenomenon
Member: -
Hobby: -
Native: Aichi, Japan
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Project Theme: Fault Diagnosis in Electrical Machines
Member: -
Hobby: -
Native: Aichi, Japan
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Project Theme: Overheating Phenomenon by Loose Screws
Member: -
Hobby: Futsal, Game
Native: Nagano, Japan
"Work together for success"
Technical Staff
Technologies Division
Information and Analysis
Department of Electrical and Mechanical Engineering
Nagoya Institute of Technology
Mizuno Laboratory,Japan
Nagoya institute of Technology,
Gokiso-cho, Showa-ku, Nagoya,
Building 6, 3F-Room Number:314,
Aichi, 466-8555, Japan
shimada.mitsuki@nitech.ac.jp