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Purpose – The purpose of this paper is to minimize the optimization parameter number of synchronous reluctance machine (SynRM) and permanent magnet (PM) assisted SynRM, and compare their relative merits with interior permanent magnet (IPM) machine for electric vehicle applications, in terms of electromagnetic performance and material cost. Design/methodology/approach – The analysis of electromagnetic performance is based on finite element analysis, by using software MAXWELL. The genetic algorithm is utilized for optimization. Findings – The rotor design of SynRM can be significantly simplified by imposing some reasonable conditions. The number of rotor design parameters can be reduced to three. The electromagnetic performance of SynRM is much poorer than that of IPM, although the material cost is much cheaper, approximately one-third of IPM. The ferrite-SynRM is competitive and even better than IPM especially for high electric loading, in terms of torque capability, torque-speed characteristic, power factor, threshold speed and efficiency. In addition, ferrite-assisted SynRM has great advantage over IPM in material cost, 55 percent cheaper. The performance of NdFeB-assisted SynRM is close to IPM in terms of torque capability, torque-speed characteristic, power factor, torque ripple and efficiency. The material cost of NdFeB-assisted SynRM is ∼25 percent lower than IPM. Originality/value – Some conditions, which can simplify the optimization of SynRM rotor, are discussed. The electromagnetic performances and material costs of SynRM, ferrite-assisted, NdFeB-assisted SynRMs and IPM are quantitatively compared and discussed. [ABSTRACT FROM AUTHOR]

The article focuses on mounting a mobile radio into the transmission hump of vehicles. Topics discussed include fitting ferrite beads onto RG-58/U coax to make a balun, the use of silver-plated copper tape in creating low-loss inductors, and the use of Sugru, a silicone-based moldable glue, for mounting mobile transceiver.

The article offers information on various products including the DIGICOM digital communications system developed by International Telephone & Telegraph Corp. for the U.S. Army, and the BIAX computer elements composed of bars of ferrite magnetic material that can perform between 10 million and 20 million operations a second, developed by Ford Motor Company's Aeronautics Division.

Answers various questions related to science. Maximum height a high jumper can attain on the moon; Functions of ferrite cylinders around the leads of most computer peripherals.

Long Beach, Calif. - J.W. Miller's PMA series of surface-mount multilayer ferrite chip bead arrays pack four ferrite beads in a single package. This arrangement allows for handling of four […]

The article offers brief information on the HRB-US Series ferrite beads from AEM Inc.

The article presents questions and answers related to amateur radio equipment including the effectiveness of the ferrite beads in spite of its varying size, the usefulness of accessory tone board to access tone capability for the 2 meter FM transceivers, and the reason for the exclusion of 75 meter band in the band chart presented in the American Radio Relay League (ARRL) General Class License Manual.

Presents information on several electronic equipment for automotive design and construction. Chip ferrite beads from Bourns; Inductors from Cooper Electronic Technologies; Digital audio amplifiers from Tripath Technology; Impress pressure sensor from Cogent Enterprises Inc.

Iron oxide raw materials for production of electronic ferrites are in short supply in the United States. The availability problem, and possible solutions to it, were addressed at a conference [...]

The article previews the WE-MPSB series SMD power ferrite for high current applications from Wurth Electronics Midcom Inc.

Provides information on the BLM03BB series of enhanced 0201 surface mount ferrite bead from Murata Electronics North America. Use of the product in technologies and applications with limited board space; Increase in demand for reduced case size components for portable electronic devices; Features of the surface mount ferrite bead series.

Features the PMA series of surface-mount multilayer ferrite chip bead arrays from J.W. Miller which pack four ferrite beads in a single package allowing the handling of four separate lines simultaneously. Applications for high-performance EMI suppression in multiple line circuits; Specifications; Performance; Price.

Presents information on various electronics component offerings in the United States. TZR1 Series trimmer capacitor from Murata Electronics North America; Low Profile E Core ferrite planar cores from AVX Corp.; BGA socket from Yamaichi Electronics USA Inc.

Stresses the importance of checking a personal computer's (PC) cables, as a way to keep the PC running properly. The importance of having good cables for maintaining a high-speed connection to the Internet; The problem of having frayed telephone cables; The importance of persistence in getting repairs from the telephone company; The use of ferrite chokes, which filter and reduce radio frequency interference from peripherals; The OmniCube, which allows two PCs to share peripherals such as a keyboard.

Reports on the unveiling of a field solver from Ansoft Corp. at the 1996 Microwave Theory and Techniques (MTT) International Symposium in San Francisco, which offers practical three-dimensional (3-D) simulation of ferrite devices. Background on the Maxwell 3D Field Simulator; Features; Applications; Price; Contact information.