TY  - GEN
N2  - The practicality of implementing, and the advantages that can arise from, a Dual Wound Machine (two
segregated windings on one generator driven by a single prime mover) have been previously reported.
It has been demonstrated that two separate machines mounted in a common frame offer no advantages
over a standard tandem arrangement and the presence of two sets of end windings in the central area
imposes volumetric overheads. By comparison Dual Windings offer a more compact arrangement with
no volume overheads. This paper considers the use of permanent magnets to provide the required 2 and
4 pole excitation fields for a generator with dual two and four pole windings. Electrical and magnetic
isolation is desirable in both sets of windings; electrical isolation is relatively straight-forward but
magnetic isolation is more complex. Magnetic isolation is gained by ensuring that the two windings’
MMF have no space harmonics in common, including the fundamentals, using techniques established in
the earlier papers. The use of a permanent magnet excitation system is considered where the basic
concept is to arrange the magnets in two radially separated layers in the normal way, but where the
magnets are of opposing polarity they are removed completely. The harmonic analysis of the resulting
field is established using an analytical technique and this is corroborated through two-dimensional finite
element flux analysis, which is also used to establish the machine performance.
DO  - 10.24868/10662
DO  - doi
AB  - The practicality of implementing, and the advantages that can arise from, a Dual Wound Machine (two
segregated windings on one generator driven by a single prime mover) have been previously reported.
It has been demonstrated that two separate machines mounted in a common frame offer no advantages
over a standard tandem arrangement and the presence of two sets of end windings in the central area
imposes volumetric overheads. By comparison Dual Windings offer a more compact arrangement with
no volume overheads. This paper considers the use of permanent magnets to provide the required 2 and
4 pole excitation fields for a generator with dual two and four pole windings. Electrical and magnetic
isolation is desirable in both sets of windings; electrical isolation is relatively straight-forward but
magnetic isolation is more complex. Magnetic isolation is gained by ensuring that the two windings’
MMF have no space harmonics in common, including the fundamentals, using techniques established in
the earlier papers. The use of a permanent magnet excitation system is considered where the basic
concept is to arrange the magnets in two radially separated layers in the normal way, but where the
magnets are of opposing polarity they are removed completely. The harmonic analysis of the resulting
field is established using an analytical technique and this is corroborated through two-dimensional finite
element flux analysis, which is also used to establish the machine performance.
AD  - University of Bath
AD  - University of Bath
AD  - University of Bath
AD  - BMT Defence & Security
AD  - University of Bath
T1  - Permanent Magnet Excitation of a Two and Four Pole Pair Dual Wound Machine
DA  - 2022-09-02
AU  - Eastham, JF
AU  - Yin, B
AU  - Zeng, X
AU  - Hodge, C
AU  - Pei, X
L1  - https://library.imarest.org/record/10662/files/INEC_2022_paper_10%20%281%29.pdf
JF  - Conference Proceedings of INEC
VL  - INEC 2022
PY  - 2022-09-02
ID  - 10662
L4  - https://library.imarest.org/record/10662/files/INEC_2022_paper_10%20%281%29.pdf
KW  - Generator
KW  - Dual Wound
KW  - Permanent Magnet
KW  - Excitation
TI  - Permanent Magnet Excitation of a Two and Four Pole Pair Dual Wound Machine
Y1  - 2022-09-02
L2  - https://library.imarest.org/record/10662/files/INEC_2022_paper_10%20%281%29.pdf
LK  - https://www.imarest.org/events/category/categories/imarest-event/international-naval-engineering-conference-and-exhibition-2022
LK  - https://library.imarest.org/record/10662/files/INEC_2022_paper_10%20%281%29.pdf
UR  - https://www.imarest.org/events/category/categories/imarest-event/international-naval-engineering-conference-and-exhibition-2022
UR  - https://library.imarest.org/record/10662/files/INEC_2022_paper_10%20%281%29.pdf
ER  -