Topic
Magnetic core
About: Magnetic core is a research topic. Over the lifetime, 30011 publications have been published within this topic receiving 155247 citations.
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TL;DR: In this article, a propulsion motor for a solar-powered aircraft using precompressed aluminum stator windings, with a fill factor of greater than 75%, in a permanent magnet synchronous machine was reported.
Abstract: This paper reports a propulsion motor for a solar-powered aircraft. The motor uses precompressed aluminum stator windings, with a fill factor of greater than 75%, in a permanent magnet synchronous machine. The motor performance is compared empirically to an identical machine with conventionally wound copper windings. It is shown that there are many advantages to using compressed aluminum windings in terms of weight reduction, thermal improvement, and lower cost, for the same loss and electromagnetic performance, provided a sufficiently high slot fill factor can be achieved. The design and manufacture of the compressed coils is also discussed. A modular stator arrangement is used, in the form of a solid coreback with keyed teeth to allow easy assembly of the compressed windings. It is noted that the electromagnetic performance of the machine is unaffected by the modular nature of the magnetic core. Two prototype motors, one wound with conventional copper and the other with precompressed aluminum windings, are constructed and tested.
58 citations
Patent•
26 Jul 2006
TL;DR: In this article, a magnetic field generating device created using a powdered ferromagnetic powder core was described, where the gap structure operates to focus the magnetic field between pole faces of the magnetic device.
Abstract: The inventive technique include a system, method and device for treating a patient. The inventive system includes a magnetic field generating device created using a powdered ferromagnetic. The system further includes a circuit in electrical communication with the magnetic core, and a power source in electrical communication with the circuit. The ferromagnetic powder core may be manufactured by at least one of the following: machining, pressing, molding, gluing, and extruding. Also, the ferromagnetic powder core may have a distributed gap structure, where the gap structure operates to focus the magnetic field between pole faces of the magnetic device.
58 citations
Patent•
20 Jul 2012
TL;DR: In an inner rotor type rotary electric machine in which a stator iron core and a rotor iron core are opposed to each other, and rugged gaps are provided between both iron cores, at least the stator IR core has an armature and is constituted by collecting a plurality of divided dust IR cores as discussed by the authors.
Abstract: PROBLEM TO BE SOLVED: To achieve high efficiency and high torque of a rotary electric machine by a method with a low cost and high reliability.SOLUTION: In an inner rotor type rotary electric machine in which a stator iron core and a rotor iron core are opposed to each other, and rugged gaps are provided between both iron cores, at least, the stator iron core has an armature and is constituted by collecting a plurality of divided dust iron cores.
57 citations
Patent•
04 Aug 1981
TL;DR: In this paper, a fault indicator for indicating the occurrence of a fault current in an electrical conductor includes a core assembly which attaches a circuit module to a monitored conductor and provides a concentrated magnetic flux indicative of the current level in the conductor.
Abstract: A fault indicator for indicating the occurrence of a fault current in an electrical conductor includes a core assembly which attaches a circuit module to a monitored conductor and provides a concentrated magnetic flux indicative of the current level in the conductor. A magnetic reed switch in the circuit module responds to the magnetic flux in the core assembly to condition an indicator in a remote indicator module to a fault-indicating state in the event of a fault. To facilitate installation and removal of the circuit module from the conductor, the core assembly is formed by a plurality of laminations secured together and arranged in a generally rectangular configuration with their ends juxtaposed along one side thereof and joined with magnetically conductive interlocking coupling members. A spring spanning the remaining opposed sides of the core biases the coupling members into engagement and allows the structure to be fitted over conductors of various sizes, while maintaining a close operative association between the conductor and the magnetic reed switch in the circuit module.
57 citations
Patent•
28 Dec 2004TL;DR: In this paper, a magnetic core member for antenna module which can improve transmission distance without increasing module thickness, an antenna module, and a personal digital assistant equipped with this was provided. But the magnetic core members were not included in this paper.
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic core member for antenna module which can improve transmission distance without increasing module thickness, an antenna module, and a personal digital assistant equipped with this. SOLUTION: In an antenna module 10 in which a magnetic core member 18 formed in sheet-like is laminated in a base substrate 14 in which a loop-like antenna module is formed, as the magnetic core member 18, one in which a figure of merit expressed by μ' × Q of 300 or more is used when an inverse number of a loss factor (tanδ=μ"/μ') expressed by a real part μ' and an imaginary part μ" of complex permeability in operating frequency is set to Q. COPYRIGHT: (C)2006,JPO&NCIPI
57 citations