Sensorless Control for a Switched Reluctance Wind Generator
... calculating the slope of the phase current and using a reducedsize neural network (NN) whose inputs are the average current and the saturated inductance. The proposed estimator requires less processing time than traditional methods and can be fully implemented using a low-cost DSP with very few addi ...
... calculating the slope of the phase current and using a reducedsize neural network (NN) whose inputs are the average current and the saturated inductance. The proposed estimator requires less processing time than traditional methods and can be fully implemented using a low-cost DSP with very few addi ...
Student Text, pp. 482-489
... increase the field strength by a barely measurable amount. As a result, they have a relative magnetic permeability only slightly greater than 1. Oxygen and aluminum are paramagnetic. Diamagnetic materials cause a very slight decrease in the magnetic field of a coil and, as a result, their relative m ...
... increase the field strength by a barely measurable amount. As a result, they have a relative magnetic permeability only slightly greater than 1. Oxygen and aluminum are paramagnetic. Diamagnetic materials cause a very slight decrease in the magnetic field of a coil and, as a result, their relative m ...
Electric Service Requirements - Singing River Electric Power
... to the final finished grade. The member shall provide a point of attachment that will allow the Association to maintain the following minimum clearances with its service drop: 1. In places not accessible to vehicular traffic - no less than 12 feet. 2. Over public streets, alleys, roads, and driveway ...
... to the final finished grade. The member shall provide a point of attachment that will allow the Association to maintain the following minimum clearances with its service drop: 1. In places not accessible to vehicular traffic - no less than 12 feet. 2. Over public streets, alleys, roads, and driveway ...
Commutator
... Design of Commutator and Brushes Commutator and brush arrangement are used to convert the bidirectional current to unidirectional current Brushes are located at the magnetic neutral axis ( mid way between two adjacent poles) The phenomenon of commutation is affected by resistance of the brush, ...
... Design of Commutator and Brushes Commutator and brush arrangement are used to convert the bidirectional current to unidirectional current Brushes are located at the magnetic neutral axis ( mid way between two adjacent poles) The phenomenon of commutation is affected by resistance of the brush, ...
Bias Field Effects on Microwave Frequency Behavior of PZT/YIG Magnetoelectric Bilayer
... field, thus enabling an effective energy conversion between electric and magnetic fields. There are two ways to excite the ME composites, either by a magnetic field or by an electric field. The first way to excite an ME composite is by an ac magnetic field at low frequencies (typically 5–10 MHz). Th ...
... field, thus enabling an effective energy conversion between electric and magnetic fields. There are two ways to excite the ME composites, either by a magnetic field or by an electric field. The first way to excite an ME composite is by an ac magnetic field at low frequencies (typically 5–10 MHz). Th ...
Amateur Radio Technician Class Element 2 Course Presentation
... What is the resistance of a circuit in which a current of 3 amperes flows through a resistor connected to 90 volts? ...
... What is the resistance of a circuit in which a current of 3 amperes flows through a resistor connected to 90 volts? ...
High Power Density Marine Propulsion Motors with Double
... Abstract— A new class of marine propulsion motors, that achieves power density far superior from that obtained in conventional superconducting synchronous motor designs, is presented. This is accomplished through the use of a novel coil design called the “double-helix” (DH) coil for the superconduct ...
... Abstract— A new class of marine propulsion motors, that achieves power density far superior from that obtained in conventional superconducting synchronous motor designs, is presented. This is accomplished through the use of a novel coil design called the “double-helix” (DH) coil for the superconduct ...
parametric study of rotor slot shape on a cage induction motor
... angular frequency of the stator supply, s is the slip, µ is the magnetic permeability and J is the current density supplied by external voltage sources. The natural excitation for finite element models is usually a current (or current density). In the real motor the current is normally unknown since ...
... angular frequency of the stator supply, s is the slip, µ is the magnetic permeability and J is the current density supplied by external voltage sources. The natural excitation for finite element models is usually a current (or current density). In the real motor the current is normally unknown since ...
Chapter 18 Study Questions
... a. kinetic energy into electrical energy. c. electrical energy into thermal energy. b. thermal energy into electrical energy. d. electrical energy into kinetic energy. 3. The marked end of a compass needle always points directly to a. Earth’s geographic South Pole. c. a magnet’s south pole. b. Earth ...
... a. kinetic energy into electrical energy. c. electrical energy into thermal energy. b. thermal energy into electrical energy. d. electrical energy into kinetic energy. 3. The marked end of a compass needle always points directly to a. Earth’s geographic South Pole. c. a magnet’s south pole. b. Earth ...
Michael Faraday
... experiment. He used a cork ball and a can. The cork was suspended on a thread and put into the can through a small opening. Franklin found that the cork wasn’t attracted to the inside, although it did touch the bottom; when drawn out, the cork was not electrified. If it touched the outside, it would ...
... experiment. He used a cork ball and a can. The cork was suspended on a thread and put into the can through a small opening. Franklin found that the cork wasn’t attracted to the inside, although it did touch the bottom; when drawn out, the cork was not electrified. If it touched the outside, it would ...
RL circuit
... Flux through coil 2 is directly proportional to current in coil 1 if both coils are in vacuum Mutual inductance only depends on geometry of coils and the orientation of the coils to each other Mutual inductance is also the same for the case when coil 2 carries the current and induces a current in co ...
... Flux through coil 2 is directly proportional to current in coil 1 if both coils are in vacuum Mutual inductance only depends on geometry of coils and the orientation of the coils to each other Mutual inductance is also the same for the case when coil 2 carries the current and induces a current in co ...
1 PHYS:1200 LECTURE 27 — ELECTRICITY AND MAGNETISM (5
... magnetic field which permeates space in a manner similar to the gravitational field that surrounds the Earth. The magnetic field of a bar magnet can be visualized by sprinkling iron filings around it as shown above on the left side. The ion filings settle into a two‐dimensional patter ...
... magnetic field which permeates space in a manner similar to the gravitational field that surrounds the Earth. The magnetic field of a bar magnet can be visualized by sprinkling iron filings around it as shown above on the left side. The ion filings settle into a two‐dimensional patter ...
Superconductivity
... same negative charge, electrons tend to repel each other, but this can change in certain materials that have a crystal lattice. The lattice vibrates with more or less energy depending on the temperature. When it is very cold, the gentle vibrations can push electrons together, producing a net attract ...
... same negative charge, electrons tend to repel each other, but this can change in certain materials that have a crystal lattice. The lattice vibrates with more or less energy depending on the temperature. When it is very cold, the gentle vibrations can push electrons together, producing a net attract ...
Calculation of Distributed Magnetic Flux Density under the Stator
... specifically, the self-magnetization and mutual inductances. Although the proposed analytical method does not consider non-linearity, it can approximate the variation pattern of the distributed magnetic characteristics under the STF condition. The stator inductance in the healthy state is 0.3 (mH). ...
... specifically, the self-magnetization and mutual inductances. Although the proposed analytical method does not consider non-linearity, it can approximate the variation pattern of the distributed magnetic characteristics under the STF condition. The stator inductance in the healthy state is 0.3 (mH). ...
Product Manual
... Due to the large number of languages and devices we support, we cannot provide examples in every language for every Phidget. Some of the examples are very minimal, and other examples will have a full-featured GUI allowing all the functionality of the device to be explored. Most developers start by m ...
... Due to the large number of languages and devices we support, we cannot provide examples in every language for every Phidget. Some of the examples are very minimal, and other examples will have a full-featured GUI allowing all the functionality of the device to be explored. Most developers start by m ...
Skin effect
Skin effect is the tendency of an alternating electric current (AC) to become distributed within a conductor such that the current density is largest near the surface of the conductor, and decreases with greater depths in the conductor. The electric current flows mainly at the ""skin"" of the conductor, between the outer surface and a level called the skin depth. The skin effect causes the effective resistance of the conductor to increase at higher frequencies where the skin depth is smaller, thus reducing the effective cross-section of the conductor. The skin effect is due to opposing eddy currents induced by the changing magnetic field resulting from the alternating current. At 60 Hz in copper, the skin depth is about 8.5 mm. At high frequencies the skin depth becomes much smaller. Increased AC resistance due to the skin effect can be mitigated by using specially woven litz wire. Because the interior of a large conductor carries so little of the current, tubular conductors such as pipe can be used to save weight and cost.