We have proposed a spin transfer switching sts moslm device, based on magneto optical mo spatial lightmodulation and driven by spinpolarized current flow, and confirmed its basic operation. We report unexpected enhancements of the magnetooptical effect in ferromagnetic permalloy disks of diameter d magneto optical recording june 27, 2014 40 the university of alabama. A magnetooptical drive is a kind of optical disc drive capable of writing and rewriting data upon a magnetooptical disc. Also explore the seminar topics paper on magnetooptical current transformer technology moct with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year electronics and telecommunication. It uses the rotation of the plane of polarization by. The moct measures the electric current by means of faraday effect.
A current measurement technique using the magnetooptic or faraday effect, has been developed, tested, and demonstrated. Magneto optic current transformer seminar report pdf. We will fix it for you we will fix it for you seminar report. Based on the faraday effect, magnetooptical current transformers mocts provide numerous advantages as compared with conventional measuring transformers. The magnetooptical phase shift is useful to realize optical nonreciprocal devices in silicon waveguide platforms. Michael faraday discovered that the orientation of linearly polarized light was rotated under the influence of the magnetic field when the. This has required the use of an auxiliary current transformer or optical isolator to avoid such problems.
The principles of measuring currents in highvoltage lines by magnetooptical means are described. The history of magneto optical effects is first introduced. Conclusion this magneto optical current transducer eliminates many of the drawbacks of the conventional current transformers. To write the data onto the disk, the magnetooptical drives laser pulses between two powers.
Sep 01, 2015 first, a theoretical analysis was performed on the effect of temperature on the performance of the sensing element of paramagnetic rare earthdoped magneto optical glass material that can be used in an optical current transducer application. To measure currents power stations and substations conventionally employ inductive type current transformers with core and windings. An accurate electric current transducer is a key component of any power system instrumentation. Particular attention is payed to using an optical fiber both as a transmission line and a measuring sensor. Optical current transformer oct ppt topics for seminar.
Optical and magneto optical characteristics of sol. Also explore the seminar topics paper on magnetooptical current transformer technology moct with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year electronics and telecommunication engineering or. Optical current transformeroct is defined as sensors that directly or indirectly use optical sensing methods to measure electric currents. Download moct ppt for seminar in electrical engineering. We report unexpected enhancements of the magnetooptical effect in ferromagnetic permalloy disks of diameter d free standing focsfs is a freestanding 3phase sensor system for 245 kv to 800 kv high voltage substations one system consists in. A wide variety of optical current transformer options are available to.
Ask the analyst to customize an exclusive study to serve your research needs. This eliminates costly problems of potential separation. Moct is a completely new generation of the instrument transformer developed since. May 29, 2011 magnetooptical current transformer technology by prasanth sun may 29, 2011 5. Also get the seminar topic paper on magnetooptical current transformer technology moct with abstract or synopsis, documentation on advantages and disadvantages, presentation slides for ieee final year electronics and telecommunication engineering or ece students for the year 2016 2017. Michael faraday discovered that the orientation of linearly polarized light was rotated under the influence of the magnetic field when the light propagated in a piece of glass, and the rotation. Moct block diagram applications pros and cons conclusion 3. Based on the faraday effect, magneto optical current transformers mocts provide numerous advantages as compared with conventional measuring transformers.
The magnetooptical current transformer is based on the faradays effect. Magnetooptical current transformer ppt electrical ppt. A fiberoptic current sensor focs is a current sensor for measuring direct current. Gardner modeling of a magnetooptic read path, proc. Magnetooptical current transformer technology by prasanth sun may 29, 2011 5. Global magneto optic current transformer market 2019 by. Explore magnetooptical current transformer technology moct with free download of seminar report and ppt in pdf and doc format. The moct system is suitable for outdoor application and has an accurate metering current range from less than 5 a to 3150 a using the same sensor.
In 1983, just a year after the introduction of the compact disc, kees schouhamer immink and joseph braat presented the first experiments with erasable magnetooptical compact discs during the 73rd aes convention. Rashmi, investigation of magnetooptical properties for optical fiber based devices 2007. Design of magneto optical traps for additive manufacture by 3d printing yijia zhou,1,2 nathan welch, 1rosemary crawford, fedja oru cevi c,1,3 feiran wang,1 peter kruger, 1,3 ricky wildman, 4christopher tuck, and t. Therefore, properties of magnetooptical materials are different for two opposite directions of light propagation and optical nonreciprocal devices like the optical isolator and the optical circulator can be fabricated only by utilizing magnetooptical materials. Contents introduction ct purpose and demerits moct principle, design, working. This write surface can take magnetism from one of those magnetic layers when it is heated up to one temperature. Free download complete engineering seminar magneto optic current transformer seminar report pdf. Global industry analysis, size, share, growth, trends, and forecasts 20162024. Magneto optic current transducer consist of a sensor head located near the current carrying conductor, an electronic signal processing unit and fiber optical cables linking to these two parts. The magneto optic current transformer moct is a passive optical current transducer which uses light to accurately measure current on high voltage systems. Download the book into available format new update. Epri report el5431 52 produced by the nist optoelectronics division and the epri report. Download the seminar report for magneto optic current transformer are you interested in any one of the topics.
Any user can access the logged data on a web browser internet explorer, firefox. Performance of magnetooptical glass in optical current. February 7th, 2017 by afsal meerankutty 1 comment an accurate current transducer is a key component of any power system instrumentation. Get magnetooptical current transformer technology moct seminar report and ppt in pdf and doc. The measurements are contactless and the measured signal is transmitted by a light beam propagating in air or in optical fibers. First, a theoretical analysis was performed on the effect of temperature on the performance of the sensing element of paramagnetic rare earthdoped magnetooptical glass material that can be used in an optical current transducer application. Arteche optical current transformer is presented as an alternative to current conventional current transformers, offering an advanced solution for both measuring and protection applications based on optical technology. Magnetooptical current transformer technology by prasanth. Magneto optical effects in magnetic materials arise due to the optical anisotropy of the materials. Magnetooptical current transformer technology provides a solution.
Magneto optic current transformer full seminar reports, pdf seminar abstract, ppt, presentation, project idea, latest technology details, ask latest information. Download the seminar report for magneto optic current. Magnetooptical devices the optics encyclopedia castera. Octs are based on faraday effect, interferometric principle, bragg grating and micromechanical sensors with optical readout. In the proposed approach, the permittivity tensor of a magneto optical material is tailored by embedded wire meshes behaving as artificial plasma. Magnetooptical current transformer technology moct seminar. Fiber optic current sensors and optical current transformers version. Conventional current transformers becomes more and more bulky and costly. Conventional current measurement in highvoltage and highemi electromagnetic. Magneto optic current transformer full seminar report, abstract. Pdf enhanced magnetooptical edge excitation in nanoscale. The magneto optic current transformer moct measures the rotation angle caused by the magnetic field and converts it into a signal of few volts proportional to the electric currant. The source of this optical anisotropy is the magnetisation m within surface domains which can be influenced by external forces such as magnetic fields. The demand for the advanced electrical equipment such as magneto optic current transformer will increase in the coming years, owing to the limitations of the conventional current transformers.
Optical current transformer is an alternative to the existing conventional current transformers, providing an advanced measurement solution for both metering and protection applications, based on a cuttingedge patented optical sensing technology. Magneto optical current transformer technology provides a solution. Design of magnetooptical traps for additive manufacture by. In many cases, the mol also provides excel1ent images of subsurface corrosion and fatigue cracks 3,6. Download limit exceeded you have exceeded your daily download allowance. Then the types of magneto optical effects are described, which include the varieties of the interactions of electromagnetic waves with magnetization or spins in solids. With increasing drawbacks of conventional current transformers such as saturation of magnetic field under high current, electromagnetic interference and complicated insulation and cooling structures are driving the demand for advanced electrical equipment, for instance, magneto optic current transformer market over the forecast. Investigation of magnetooptical properties for optical.
In order to measure the electric current, power stations and substations make use of the current transformers that are of inductive type having windings and core. The device developed is a magnetooptic current transducer moct. In the power system instrumentation, the magneto optic current transformer plays a very crucial role. The influence of birefringence on the measuring signal is discussed. The conventional magnetoopticeddy current imager mol is an approved, widely used 711, and costeffective ndi instrument 12, which produces excellent real time images of surfacebreaking fatigue cracks 4,5. Seminar report magneto optical current transformer electrical. A wide variety of optical current transformer options are available to you, such as usage, phase.
The scope of the conference covered a broad range of topics, including cur. Global magneto optic current transformer market analysis. Download your presentation papers from the following links. Some of the main features of optical current transformer are. Required performances on high density recording materials are summarised and the specificity of the successive generations of mor media discussed. An estimate of the signal current as a function of time is generated by the spot scanning along a length of the simulated disk that has an mo signal pattern and noise written on it.
Optical isolators based on the mzi and ring resonator are discussed in sections 3 and 4, respectively, while an mzi based optical circulator is described in section 5. The seminar topic is based on magneto optical current transformer presented byaishwarya verma0902011 contents. Front surface recording using the head and media well designed for blue laser achieved recording density of 17 gbin 2, giving 23 gb120 mm media. Download optical current transformer oct ppt for electrical engineering seminar. The magnetooptic current transformer moct is a passive optical current transducer which uses light to accurately measure current on high voltage systems. Keeping current computer science university of kentucky. In the second part of my talk, i will describe how the vast mobile sensor.
Michael faraday discovered that the orientation of linearly polarized light was rotated under the influence of the magnetic field when the light propagated in a piece of glass, and the rotation angle was proportional to the intensity of the magnetic field. Magnetooptical current transformer of high bandwidth and. Download moct seminar report and ppt to learn more. Moct magnetooptical current transformer seminar topics. Ceyig exhibits a large faraday rotation in the nearir region.
This separates the faraday magneto optical effect from natural optical activity in chiral media, that is, an optical rotation produced without an external magnetic field applied, which arises from the low symmetry of individual molecules or from the symmetry of the unit cell in a crystal, 14. Report from magnetooptic recording symposium the first international conference dedicated entirely to magnetooptic recording, moris91, magnetooptic recording international sym posium, was held in tokyo, japan, from 16th to 19th april 1991. Magnetooptical devices for optical integrated circuits. Also explore the seminar topics paper on magneto optical current transformer technology moct with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year electronics and telecommunication engineering or. It consist of a sensor head located near the current carrying conductor, an electronic signal processing unit and. The magnetooptical current transformer is based on the. Optical current transformer oct is defined as sensors that directly or indirectly use optical sensing methods to measure electric currents. One of the arms, with a highly stable permanent magnet attached and orthogonal to the other one, is designed to provide a reference that follows the temperature characteristics of the sensing material. Introduction moctprinciple the magneto optical current transformer is based on the faradays effect. The seminar topic is based on magneto optical current transformer presented byaishwarya verma0902011 2. Moct optical current transformer system for metering 72. In an conventional current transformers, there is a chance of saturation of magnetic field under high current, complicated insulation and cooling structure, a chance of electro magnetic interference.
Magnetooptical current transformer technology moct. By using a singleended optical fiber around the current conductor that utilizes the magnetooptic effect faraday effect, focs measures uni or bidirectional dc currents of up to 600 ka within 0. With increasing drawbacks of conventional current transformers such as saturation of magnetic field under high current, electromagnetic interference and complicated insulation and cooling structures are driving the demand for advanced electrical equipment, for instance, magneto optic current transformer market over the. Download the seminar report for magneto optic current transformer. The second important property of the magnetooptical materials is a memory function. We have shown that the angle of rotation in the magneto optical metamaterial can be enhanced up to 9 times compared to bulk magneto. Pdf magnetooptical properties of ptcoxizo x ta, au.
We report the growth of cesubstituted yttrium iron garnet ceyig thin films deposited by pulsed laser deposition on quartz substrates. To measure currents power stations and substations. Download the test reports for circutors td transformers free of charge from. A novel magnetooptical current sensor mocs with two sensing arms is proposed to improve the temperature stability. Current transformer power system analysis free lecture pdf download resistance and leakage reactance of transformer or impedance of transformer power system analysis free lecture notes download theory of transformer on load, with resistance and leakage reactance in transformer power system analysis free pdf download. The magneto optical current transformer is based on the faradays effect.
Logging of variables such as voltage and current per second may be. Extensive bandwidth, able to measure both dc and ac current up to 100 harmonic. This is a department colloquium, not a keeping current seminar. The physical origin of the magneto optical effects is phenomenologically discussed. Optical current transducers for electrical power systems nist page. Investigation of magnetooptical properties for optical fiber based devices rashmi bahuguna. Enhanced magnetooptical edge excitation in nanoscale magnetic disks.
Moctmagneto optic current transformer free download as powerpoint presentation. Explore magneto optical current transformer technology moct with free download of seminar report and ppt in pdf and doc format. The magneto optical current transducer eliminates many of the drawbacks of the conventional current transformers. Magnetooptical current transformermoct seminar report. Request for a research sample before report purchase. Fiber optic current sensors and optical current transformers. Magnetoopticeddy current imaging of subsurface corrosion. Magnetooptical nonreciprocal devices in silicon photonics. Mar 25, 2012 conclusion this magneto optical current transducer eliminates many of the drawbacks of the conventional current transformers. Scribd is the worlds largest social reading and publishing site. Upon investigating the phase composition and the magnetic and magnetooptical properties of the films, we present optimal process conditions for growing ceyig thin films on quartz substrates. Magneto optic current transformer market global industry.
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