# 6,721 resources related to Magnetic Hysteresis

### IEEE Organizations related to Magnetic Hysteresis

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### Conferences related to Magnetic Hysteresis

2020 IEEE International Magnetic Conference (INTERMAG)

INTERMAG is the premier conference on all aspects of applied magnetism and provides a range of oral and poster presentations, invited talks and symposia, a tutorial session, and exhibits reviewing the latest developments in magnetism.

2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

The Conference focuses on all aspects of instrumentation and measurement science andtechnology research development and applications. The list of program topics includes but isnot limited to: Measurement Science & Education, Measurement Systems, Measurement DataAcquisition, Measurements of Physical Quantities, and Measurement Applications.

IECON 2020 - 46th Annual Conference of the IEEE Industrial Electronics Society

IECON is focusing on industrial and manufacturing theory and applications of electronics, controls, communications, instrumentation and computational intelligence.

2019 International Aegean Conference on Electrical Machines and Power Electronics (ACEMP) & 2019 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)

This joint international conference provides an international forum for expert discussions on the latest research and developments in electrical, electronics and industrial tecnologies

2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII)

The world's premiere conference in MEMS sensors, actuators and integrated micro and nano systems welcomes you to attend this four-day event showcasing major technological, scientific and commercial breakthroughs in mechanical, optical, chemical and biological devices and systems using micro and nanotechnology.The major areas of activity in the development of Transducers solicited and expected at this conference include but are not limited to: Bio, Medical, Chemical, and Micro Total Analysis Systems Fabrication and Packaging Mechanical and Physical Sensors Materials and Characterization Design, Simulation and Theory Actuators Optical MEMS RF MEMS Nanotechnology Energy and Power

### Periodicals related to Magnetic Hysteresis

No periodicals are currently tagged "Magnetic Hysteresis"

### Xplore Articles related to Magnetic Hysteresis

IEEE Transactions on Magnetics, 2000

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Proceedings of the American Institute of Electrical Engineers, 1909

It is well known that if the wave-shape or the frequency varies from the normal, the loss in a transformer core at normal voltage varies also. It is obvious, however, that the normal loss, that is, the loss with the sine-wave shape and the normal frequency of, say, 60 cycles, can be obtained under the abnormal conditions of wave shape ...

Proceedings of the American Institute of Electrical Engineers, 1906

Charles Proteus Steinmetz: This paper deals with the wave-shape distortion produced in alternating-current circuits by the introduction of iron. It is a theoretical paper, and while of scientific interest appears at first of rather little-practical value to the electrical engineer. There is, however, to-day only a very short step between pure scientific investigation and engineering practice; and I hope to ...

Proceedings of the American Institute of Electrical Engineers, 1914

Waldo V. Lyon (by letter): The interesting fact that Mr. Clinker notes in regard to the possibility of a third-harmonic voltage existing between the lines of a three-phase circuit was observed by the writer some time since, and was used as the basis of one of the problems in a collection∗recently published by him. These third-harmonic components in the line ...

Proceedings of the American Institute of Electrical Engineers, 1911

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### Educational Resources on Magnetic Hysteresis

#### IEEE-USA E-Books

• None

• It is well known that if the wave-shape or the frequency varies from the normal, the loss in a transformer core at normal voltage varies also. It is obvious, however, that the normal loss, that is, the loss with the sine-wave shape and the normal frequency of, say, 60 cycles, can be obtained under the abnormal conditions of wave shape and frequency by either raising or lowering the voltage. What is needed then, is an indicator which will enable the voltage to be so adjusted that the loss in a transfomer core as measured upon an ordinary wattmeter will be the same as it would be at normal voltage on a circuit having a sine-wave shape of normal frequency.

• Charles Proteus Steinmetz: This paper deals with the wave-shape distortion produced in alternating-current circuits by the introduction of iron. It is a theoretical paper, and while of scientific interest appears at first of rather little-practical value to the electrical engineer. There is, however, to-day only a very short step between pure scientific investigation and engineering practice; and I hope to show you that the phenomena dealt with in this paper, and similar phenomena, are of very great practical importance in alternating- current distribution; that is, wave-shape distortion may lead to effects not only very marked and pronounced but occasionally disastrous. In general, in investigating the effect of iron in alternating-current circuits, the curve of exciting current is calculated from the hysteresis cycle of the iron. Dr. Bedell proceeds inversely by superposing different harmonics of current. From these complex currents he produces a hysteresis loop, noting whether this hysteresis loop is a reasonable one or not, and deriving therefrom relations regarding the relative intensity and phase of the triple harmonic in the wave of exciting current. As far as the investigation goes, it extends only to the fundamental and triple harmonics; the investigation of higher harmonics is left to a future occasion.

• Waldo V. Lyon (by letter): The interesting fact that Mr. Clinker notes in regard to the possibility of a third-harmonic voltage existing between the lines of a three-phase circuit was observed by the writer some time since, and was used as the basis of one of the problems in a collection∗recently published by him. These third-harmonic components in the line voltages are equal but differ in phase by 120 degrees (third-harmonic scale) so that the circuit should respond to their influence in the same way that it would if sinusoidal voltages of three times the fundamental frequency were impressed upon it. This might produce serious results especially in transmission lines, if the harmonics were of sufficient magnitude. This phase difference in the third harmonic makes the resulting three-phase voltages dissimilar as Mr. Clinker points out. Their effective values, however, are equal.

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• The single-phase alternator has been in comrrtercial use now for twenty years and it may seem surprising that there should be new developments at this late date. However, single-phase alternators have been used in the past almost exclusively for lighting work, and in units of comparatively small output and low speed. Recently, on account of the adoption of single-phase current for traction work, an important demand has arisen for large high-speed, low- frequency, single-phase generators. It is in the design and manufacture of such units that the engineer has had to overcome new difficulties. In large, high-speed, single-phase generators for 15 and 25 cycles the difficulties met with are due almost entirely to the large pole-pitch and high armature reaction which it is necessary to adopt. A 500-kw., 60-cycle, 72-pole, single- phase generator would have a pole-pitch of about 7 in., while a 6000-kw., 15-cycle, 2-pole machine would have one machine of about 120 in. It is easily seen that the design of these will be radically different.

• The object of the experiments recounted below was to establish a reliable and if possible a rational quantitative relation between the pole-face losses and the principal variables involved therein. The work was originally undertaken as a supposedly small part of a larger investigation without any realizing sense of the amount of work involved or of the difficulty of obtaining reliable results. Another time the method employed would be modified in the light of this experience, but although the results are not altogether satisfactory from the standpoint of the investigator, they are sufficiently accurate for most practical purposes, and it is believed more reliable than those heretofore published.

• This chapter contains basic concepts that can be used for all rotating machines and for power transformers. It presents a more complete analysis and more detailed circuit models of real-life transformers. When the transformer operates in sinusoidal steady state, the corresponding phasor circuit can be used to analyse it. Three-phase transformers can have different construction modes. The chapter briefly presents only the transformers created as a three- phase bank of single-phase transformers. Magnetic hysteresis is important also from an energy point of view: it can be demonstrated that hysteresis phenomenon implies loss of energy in the magnetic circuit of the transformer, which reduces efficiency and heats the iron.

• It is well known that in a circuit containing no iron an impressed sinusoidal electromotive force will cause a sinusoidal current to flow, the current lagging behind the impressed electromotive force by an amount depending upon the relative values of the resistance and inductance, which in this case is constant. Assuming inductance alone in the circuit, the sine current which flows lags 90° behind the sine electromotive force and represents no power, the power-factor (cos 90°) being zero.

• The paper gives results and analyses of tests to determine losses in hysteresis loops wherein the magnetism is carried through cycles in which limiting values of flux are different in amount or the mean values of flux differ from zero. Such variations of magnetism occur in inductor generators, in teeth of induction machines and in materials magnetized from rectifier circuits, etc. The author finds that: 1. The losses in unsymmetrical loops are greater than in symmetrical loops of the same difference of limiting values of flux. 2. For loops of the same difference of limiting values of flux, the losses increase as a definite power of the mean flux density. 3. The increased loss as a power of the mean density is the same for any range of loops or difference of limiting flux values. 4. With any given value of mean density, the increased losses with increased range increases as definite power of the range irrespective of the mean value of density selected. The author covers these points in an equation to express the loss in any loop. The general equation is:$h=(\eta + \alpha B_{m^{y}}) B^{x}$wherein η and x are the constants of the Steinmetz law, α is a coefficient depending upon the material, and y a power of the mean density. The present tests satisfied the equation in the form:$h=(\eta + \alpha B_{m^{1.9}}) B^{1.6}$.