نتایج جستجو برای: winding mechanical fault

تعداد نتایج: 303679  

Fault zones and fault-related fracture systems control the mechanical behaviors and fluid-flow properties of the Earth’s crust. Furthermore, nowadays, modeling is being increasingly used in order to understand the behavior of rock masses, and to determine their characteristics. In this work, fault zones and fracture patterns are reviewed, and also comprehensive studies are carried out on the fr...

2016
Nantian Huang Huaijin Chen Guowei Cai Lihua Fang Yuqiang Wang

Mechanical fault diagnosis of high-voltage circuit breakers (HVCBs) based on vibration signal analysis is one of the most significant issues in improving the reliability and reducing the outage cost for power systems. The limitation of training samples and types of machine faults in HVCBs causes the existing mechanical fault diagnostic methods to recognize new types of machine faults easily wit...

Journal: :Expert Syst. Appl. 2012
D. A. Asfani A. K. Muhammad Syafaruddin Mauridhi Hery Purnomo Takashi Hiyama

Monitoring system for induction motor is widely developed to detect the incipient fault. Such system is desirable to detect the fault at the running condition to avoid the motor stop running suddenly. In this paper, a new method for detection system is proposed that emphasizes the fault occurrences as temporary short circuit in induction motor winding. The investigation of fault detection is fo...

2016
Nagesh Kumar

According to modern grid regulations, doubly fed induction generator (DFIG) needs to operate without losing synchronism during grid faults. But, severe fault leads to rise in stator and rotor current to a higher value and generator will get damaged. Large oscillations in stator real and reactive power are produced and consequently large torque oscillations get developed. To overcome the above a...

Journal: :Indonesian Journal of Electrical Engineering and Computer Science 2021

<p>Condition monitoring and on-line detection have attracted several researchers in order to carry out an efficient diagnosis of machine failures. Therefore, the early stage avoids system breakdown reduce maintenance cost. This paper presents a new diagnosic approach detect broken bars end ring faults for squirrel cage induction based on fast Fourier transform analysis applied signature a...

2013
Mohamed Benbouzid Brice Beltran Marwa Ezzat Sylvie Breton

This research note deals with grid fault-tolerance of a doubly-fed induction generatorbased wind turbine using high-order sliding mode control. Indeed, it is proposed to assess the main and attractive features of high-order sliding modes which are robustness against external disturbances (e.g. grid) and chattering-free behavior (no extra mechanical stress on the drive train). Simulations using ...

2012
Prashanth Banakar H. K. Shivanand H. B. Niranjan

The purpose of this study is to review many of the available guidelines for Polymer composite materials. Guide lines for failure mode, laminates orientation, winding angle, water absorption, as they strongly influence the mechanical properties of composite materials. The present review is focused on composite laminates made of glass, carbon, graphite, hybrid and natural fiber composites, since ...

Heidari, M.,

Identifying fault categories, especially for compound faults, is a challenging task in mechanical fault diagnosis. For this task, this paper proposes a novel intelligent method based on wavelet packet transform (WPT) and multiple classifier fusion. An unexpected damage on the gearbox may break the whole transmission line down. It is therefore crucial for engineers and researchers to monitor the...

Journal: :Machines 2023

This article presents an evaluation of Prony method estimation and its implementation considerations for surge comparison test application in turn insulation diagnostics three-phase stator windings. Surge testing compares recorded voltage signals motor winding, a diagnostic is then defined with value EAR (error area ratio), which evaluates the difference between to determine diagnostic. First, ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید