Zobrazeno 1 - 10
of 36
pro vyhledávání: '"B. J. Chalmers"'
Autor:
R. Akmese, B. J. Chalmers
Publikováno v:
Electric Machines & Power Systems. 25:317-326
This paper concerns the peculiar voltage regulation characteristics of an alternator with buried permanent-magnet excitation. An introductory analysis shows that, with resistive load, the output voltage V rises above its open-circuit value E as curre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::378341c4bd70c97b49d67fbe080e4c35
https://doi.org/10.1080/07313569708955742
https://doi.org/10.1080/07313569708955742
Publikováno v:
Supermagnets, Hard Magnetic Materials ISBN: 9789401054683
A number of alternative topologies for brushless d.c. machines are considered, commencing with the established form which has its windings in a slotted stator core. An elementary method is outlined for evaluation of torque, including the influence of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2e0ed360edfd6d59c6f9c6d2fb225c5
https://doi.org/10.1007/978-94-011-3324-1_28
https://doi.org/10.1007/978-94-011-3324-1_28
Autor:
B. J. Chalmers, E. Spooner
Publikováno v:
Supermagnets, Hard Magnetic Materials ISBN: 9789401054683
It is often necessary to vary the field excitation in electrical machines. Hybrid excitation systems may be considered for this purpose, combining permanent magnets and a controllable field coil of reduced capacity. The magnetic circuits of d.c. mach
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a83a9dba98201639332823b961f19691
https://doi.org/10.1007/978-94-011-3324-1_29
https://doi.org/10.1007/978-94-011-3324-1_29
Autor:
B. J. Chalmers
Publikováno v:
Supermagnets, Hard Magnetic Materials ISBN: 9789401054683
A method is presented for analysing the performance of a synchronous motor with permanent-magnet excitation, in terms of conventional two-axis machine theory. The machine parameters used in this theory are discussed and methods for evaluating these p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::015e37a57ff6348d44419d0c2be8a955
https://doi.org/10.1007/978-94-011-3324-1_27
https://doi.org/10.1007/978-94-011-3324-1_27
Publikováno v:
IEE Proceedings - Electric Power Applications. 151:151
A general, analytic approach to the calculation of magnet fields in a slottless, axial-flux, permanent magnet generator is presented. The basic 'building block' is the vector potential produced by a current sheet situated between two, infinitely perm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c92dc042e00a9c59219383d9c113a34
https://doi.org/10.1049/ip-epa:20031063
https://doi.org/10.1049/ip-epa:20031063
Autor:
G. Önbilgin, B. J. Chalmers
Publikováno v:
The International Journal of Electrical Engineering & Education. 16:87-91
The paper presents an analysis of torque production in a synchronous motor with constant-current supply under highly-saturated conditions, using the Frohlich approximation to represent the magnetisation characteristic. Attention is focussed upon cond
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35ccf084ae210ca75d88454a6f99a76a
https://doi.org/10.1177/002072097901600126
https://doi.org/10.1177/002072097901600126
Publikováno v:
IEEE Transactions on Power Apparatus and Systems. :2927-2935
This paper presents a method of analysing the performance of linear induction machines with saturable steel secondary. This is achieved using the finite element method with an effective complex permeability function to account for saturation. In this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d046ae6a347f0b05422987630ec45cc1
https://doi.org/10.1109/tpas.1981.316357
https://doi.org/10.1109/tpas.1981.316357
Autor:
B. J. Chalmers, S. Bouchiker
Publikováno v:
The International Journal of Electrical Engineering & Education. 17:227-232
A new analysis of induction machines with constant-current excitation is presented, using a modified Fröhlich approximation to the magnetisation characteristic. The normalised solution for conditions at maximum torque is given in the form of general
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da7132d24274b99e7e6391595cc58c38
https://doi.org/10.1177/002072098001700306
https://doi.org/10.1177/002072098001700306
Autor:
G. Onbilgin, B. J. Chalmers
Publikováno v:
Electric Machines & Power Systems. 5:345-354
A method is presented for evaluation of the performance of a voltage-fed variable-speed synchronous motor drive. Special features include a treatment of magnetic saturation in a machine with rotor saliency and the incorporation of a current limit. Ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aea85a467661c95d61791059c46dbdbe
https://doi.org/10.1080/07313568008955415
https://doi.org/10.1080/07313568008955415