The Sustainability of Experience — Investing in the Human Factor 28th Annual USSD Conference Portland‚ Oregon‚ April 28 - May 2‚ 2008 Hosted by Portland General Electric On the Cover Portland General Electric’s North Fork Dam‚ on the Clackamas River southeast of Portland‚ is a thin‚ variable-radius concrete arch dam with a maximum height of 207 feet and a thickness varying from 32 feet at the base to 8 feet at the crest. The spillway is a 200-foot-long gated ogee-type structure with
Premium Electric current Magnetic field
is placed in varying magnetic field‚ an emf is induced in the coil. Synchronous Generator consists of two main windings‚ the armature winding and the field winding. The armature winding is on the stator and the field winding is on the rotor. For a three phase generator‚ the windings of each phase of the armature are displaces by 120 degrees from each other around the inside periphery. The field winding is a coil which carries dc current and hence produces constant magnetic field. Besides the armature
Premium Magnetic field Electric motor
Contents: 1. Introduction 1.1 Basic Physics of Charged Particles Moving In a Magnetic Filed 1.2 The Lorentz Force 1.3 The Hall Effect 2. What Is Plasma? 2.1 What is it that distinguishes plasma from ordinary gases? 2.2 Commercial Applications 2.3 Waves in Plasma 3. Nuclear Fusion & Fusion Reactors 3.1 The Lawson’s Criterion 3.2 Magnetic Field Confinement 3.3 Inertial Confinement 4. TFTR & Its Contributions to Engineering 4.1 Transport 4.2 Fusion Power Production 4.3 Alpha-Particles
Premium Magnetic field Electric charge
relationships in the field. Because of their concise statement‚ they embody a high level of mathematical sophistication and are therefore not generally introduced in an introductory treatment of the subject‚ except perhaps as summary relationships. These basic equations of electricity and magnetism can be used as a starting point for advanced courses‚ but are usually first encountered as unifying equations after the study of electrical and magnetic phenomena. Symbols Used | E = Electric field | ρ = charge
Premium Maxwell's equations Magnetic field Electromagnetism
as power factor compensators (synchronous condensers). •Asynchronous (Induction) Machines: •Induction Motors: Most widely used electrical motors in both domestic and industrial applications. •Induction Generators: Due to lack of a separate field excitation‚ these machines are rarely used as generators. • Generators convert mechanical energy to electric energy. Energy Conversion • Motors convert electric energy to mechanical energy. • The construction of motors and generators are
Premium Magnetic field
6400 km UNITS- 1. ELECTROSTATICS 2.CURRENT ELECTRICITY 3.MAGNETIC EFFECT OF CURRENT AND MAGNETISM 4. EMI & AC 5. EM Waves. Q.1 How is the relative permeability (µr) of a material related to its susceptibility (χm) ? 1 Q.2 A metallic wire 1 m in length is moving normally across a field of 0.1 T with a speed of 5 ms-1. Find the emf between the ends of the wire. 1 Q.3 What is the angle between the directions of electric field at any (i) axial point and (ii) equatorial point due to an electric
Premium Magnetic field Electric charge
Research Review Article Evidence-Based Use of Pulsed Electromagnetic Field Therapy in Clinical Plastic Surgery Berish Strauch‚ MD; Charles Herman‚ MD; Richard Dabb‚ MD; Louis J. Ignarro‚ PhD; and Arthur A. Pilla‚ PhD Background: The initial development of pulsed electromagnetic field (PEMF) therapy and its evolution over the last century for use in clinical surgery has been slow‚ primarily because of lack of scientifically-derived‚ evidence-based knowledge of the mechanism of action.
Premium Wound healing Nitric oxide Magnetic field
4800-058 Guimarães‚ Portugal delfimpedrosa@gmail.com‚ sena@dei.uminho.pt Abstract. Spinning a wire loop within a uniform magnetic field in a convenient fashion induces a voltage between the loop terminals. This effect can be used to build an electric power generator‚ such as the one described in this paper. A coil attached to a shaft spins within the magnetic field of a "U" shaped magnet. Three conveniently designed conductive disks allow the electrical load of the generator to be fed either
Premium Electrical generator Electromagnetism Alternating current
Electromagnetic induction [1](“Faraday’s Law‚ discovered in 1831 by Michael Faraday‚ states that the induced electromotive force in a closed circuit is equal to the time rate of change of the magnetic flux through the circuit. Under Faraday’s Law‚ electric current is induced only if either the magnetic field is changing or the conductor is moving. Generators‚ for example‚ spin a coil of wire around a magnet to produce a steady current” [3]) did electricity become viable for use in technology. Since
Premium Magnetic field Electromagnetism Faraday's law of induction
Thales of Miletus‚ who lived from about 625 BC to about 545 BC.[1] Around the same time‚ in ancient India‚ the Indian surgeon‚ Sushruta‚ was the first to make use of the magnet for surgical purposes.[2] There is some evidence that the first use of magnetic materials for its properties predates this‚ J. B. Carlson suggests that the Olmec might have used hematite as a magnet earlier than 1000BC[3] [4] In ancient China‚ the earliest literary reference to magnetism lies in a 4th-century BC book named
Premium Electromagnetism Magnetic field Magnetism