Eddy current

fields. When they truly arrange themselves, they can produce a single magnetic field over all. Some permanent magnets are used in the basis of electromechanical device. The electromagnets are magnets controlled by electricity and the electrical current makes a magnetic field. They use negative and positive poles to make the magnetic fields. Some soft magnetic metals can be strengthened or weaken by how much electret is flowing to electromagnet. The magnets they can use the flow from a…

Robert Fulton was an American engineer and inventor in the 1800s. He is best known for successfully creating the commercial steamboat, “The North River Steamboat of Clermont.” What some do not know, is that he was also a painter, a canal engineer, a philosopher. Although Robert Fulton did not invent the steamboat, his participation in developing new machines for naval warfare was more significant than his involvement with “The North River Steamboat of Clermont.” In fact, some may say that he was…

1.1 Dielectric Materials Dielectric materials are insulating materials that exhibit the property of electrical polarization. Dielectric materials support charge by acquiring a polarisation in an electric field. 1.1.1 Electric susceptibility and permittivity When a capacitor with capacitance C0 is filled with a dielectric material, its charge storage capacity (capacitance) increases to a value of C. Than susceptibility (χ^') of the dielectric materials is given by χ^'= (C-C_0)/C Dielectric…

magnetism and electricity. This paper will give backgrounds on both Faraday and Oersted and will compare and contrast their works. Michael Faraday was born in London on September 22, 1791. He was the first person to produce an electric current from a magnetic field, He discovered diamagnetism and explained why some substances react opposite to a magnetic force when they encounter a magnetic field. He also discovered the effect of magnetism on light and he invented the electric…

Dipole-dipole array has wide using in resistivity/I.P. surveys because of the low E.M. coupling between the current and potential circuits. The arrangement of the electrodes is shown in Figure( )., Electrodes c1 and c2 are separated by a distance (a), and electrodes p1 and p2 are separated by a distance (b). the distance between the potential electrodes pair c1-c2 is the same as the distance between the potential electrodes pair P1-P2 and the distance between the centers of the respective…

a) According to the right-hand rule, the direction of the magnetic fields of the 3 wires are shown: We find the magnetic fields B1, B2 and B3: 퐵1=퐵2= 푢0 푖 = 푢0 푖 = 4∗3.14×10−7 ∗(3.65) =ퟒퟐ.ퟔퟔퟎ풖푻 2휋푟 2휋( 2푎) 2 ∗ 3.14 ∗( 2(0.0121)) 퐵3= 푢0 푖 = 푢0 푖 = 4∗3.14×10−7 ∗(3.65) =ퟐퟎ.ퟏퟏퟎ풖푻 2휋푟 2휋(3푎) 2 ∗ 3.14 ∗(3∗(0.0121)) The x components of the B1 and B2 cancel each other; therefore the net magnetic field will be downward and we have (the negative sign is because the direction is downward): 퐵=− 퐵1cos 45 +…

speed controller, and voltage source inverter (VSI). A.PULSE WIDTH MODULATION It is a commonly used technique for controlling power to inertial electrical devices, made practical by modern electronic power switches. The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast pace. The longer the switch is on compared to the off periods, the higher power supplied to the load is. The PWM switching frequency has to be…

conduction states, which are presented in Fig. 3. MOSFET on-resistance Ron is necessary to limit the instantaneous current when two capacitors are connected in parallel (e.g. in Fig. 3c). Seeing that, MOSFET is the preferred switch to realize the proposed converter, due to its resistive behavior when conducting. With the intention to simplify the analysis, it was assumed the current, independent of the direction, always will be conducted by the MOSFET channel, instead of the body diode. The…

Week 4 Family and Friends Task 7 – Ten suppressed inventions Suppressed inventions are inventions that have been put an end to it by force. Wardenclyffe Tower is one of the suppressed inventions developed by Nikola Tesla. It could successfully send wireless electricity to any part of the world in abundance (Free Energy, n.d.). Although it has been suppressed because the funding for it was cut by J.P. Morgan, who also ostracized any further funding from any other organizations. Wardenclyffe tower…

Davy’s Journey Towards Electromagnetism During the early 1800s, scientists made observations that were tested repeatedly and then were seen as fact. Until 1820, electricity and magnetism were believed to be separate branches on the tree of science. Once others believed that idea it became cemented in to the scientific community. However, Humphry Davy was a chemist whose determination and experimentation overturned that idea. Despite obstacles, Oersted’s and Davy‘s experiments changed his peers’…