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مجال
التميز
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تميز دراسي و بحثي
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البحوث المنشورة
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البحث (1):
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عنوان البحث:
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Design And Analysis Of A Flux
Concentrated Linear Vernier Hybrid Machine With Consequent Poles
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رابط إلى البحث:
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تاريخ النشر:
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22/05/2019
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موجز عن البحث:
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In low speed applications,
variable reluctance permanent magnet machines are often proposed due to their
efficient use of magnet material and high torque density. This becomes even
more important in large linear applications, where the translator is longer
than the stator. Often, however, very low power factors are experienced by
this class of machine. This paper proposes a V-shape flux concentrated
version of a consequent pole linear Vernier hybrid permanent magnet machine
and compares it to a surface mounted magnet variant. Using finite element
analysis validated by two laboratory prototypes, it is shown that the flux
concentrated version increases the airgap flux density, which potentially
leads to an improvement in the force density and efficiency, or can be used
to increase the operating power factor.
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البحث ( 2 ):
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عنوان البحث:
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A Cylindrical Linear Permanent
Magnet Vernier Hybrid Machine For Wave Energy
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رابط إلى البحث:
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تاريخ النشر:
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02/11/2018
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موجز عن البحث:
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In some wave energy converters, there is a need for linear
electrical machines where all the active parts are mounted on the stator. For
this reason the linear Vernier hybrid machine has been investigated. In other
research, it is analyzed in 2D and assumed to have a flat cross-section. In
this paper a cylindrical version of the Vernier hybrid machine is presented
and analyzed. A geometrical model is used to investigate potential mass
savings of the cylindrical version, and a finite element analysis design study
is used to demonstrate a potential improvement in performance. A proof of
concept laboratory scale model has been built and tested to validate the
predictions.
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البحث ( 3):
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عنوان البحث:
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Evaluating Alternative Linear
Vernier Hybrid Machine Topologies For Integration Into Wave Energy Converters
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رابط إلى البحث:
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تاريخ النشر:
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04/10/2018
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موجز عن البحث:
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This paper discusses the development of linear Vernier Hybrid
Machines for use in wave energy converters. A number of topology options are
explored to reduce magnet usage and improve performance for use as a linear
generator. Consequent pole, V-shape and Halbach arrays are designed for a
target 25kW specification. A discussion of overall cost of energy produced is
used to justify using efficiency and power factor to asses fixed magnet mass
topology variants. A power factor improvement from 0.38 to 0.72 is presented.
Physical integration of the electrical machine into wave energy converters is
considered including flooded experimental results of thermal behavior and
polymer bearing wear.
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المؤتمرات العلمية:
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المؤتمر (1):
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عنوان المؤتمر:
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2017 IEEE International Electric Machines And Drives
Conference (IEMDC)
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تاريخ الإنعقاد:
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21-24 May 2017
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مكان
الإنعقاد:
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Miami, FL, USA
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طبيعة المشاركة:
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Paper presentation
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عنوان المشاركة:
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Development Of A Double-Sided Consequent Pole
Linear Vernier Hybrid Permanent-Magnet Machine For Wave Energy Converters
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ملخص المشاركة:
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Wave energy conversion can be
simplified by using direct drive linear generators which may improve
reliability. Numerous topologies of direct drive linear generators have been
proposed in the last few decades such as the linear vernier hybrid permanent
magnet (LVHPM) machine. However, the cost of this kind of machine is driven
by the quantity of permanent magnet (PM) material. This paper proposes a
linear vernier hybrid permanent magnet machine with consequent pole and
concentrated windings for wave energy converters, which requires less magnet
material for comparable performance. The key of the proposed design is the
modular stator where the unbalanced magnetic circuit caused by consequent
pole can be eliminated. Based on finite element analyses (FEA) the present
machine is capable of higher thrust force, higher back EMF and lower cogging
force as well as force ripple compared to that of a baseline LVHPM machine.
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الرابط:
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Click here
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المؤتمر (2):
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عنوان المؤتمر:
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2017 IEEE International Electric Machines And Drives
Conference (IEMDC)
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تاريخ الإنعقاد:
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21-24/05/2017
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مكان
الإنعقاد:
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Miami, FL, USA
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طبيعة المشاركة:
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Paper presentation
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عنوان المشاركة:
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An E-Core Linear Veriner Hybrid Permanent Magnet Machine With
Segmented Translator For Direct Drive Wave Energy Converter
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ملخص المشاركة:
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This paper proposes a new
topology of a Linear Veriner Hybrid Permanent Magnet (LVHPM) machine with
E-core stators and a segmented chamfered translator, which is shown to give
mass reduction and better magnetic flux path compared to existing designs.
Linear Permanent Magnet (PM) generators have the capability to reduce the
number of moving parts, providing a simpler mechanical drive train when used
as an all-electric direct drive power take-off for wave energy converters.
The translator can be directly connected to a heaving buoy, or similar, to
translate linear motion from the ocean waves into electricity. In this paper,
the electromagnetic performance including magnetic flux, back EMF, cogging,
thrust force, thrust ripple as well as force density of the new segmented
chamfered translator design is analyzed in Finite Element Analysis (FEA). The
proposed design is compared with two different models and shown to produce
the best performance among those models.
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الرابط:
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Click here
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المؤتمر (3):
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عنوان المؤتمر:
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2018 XIII International Conference On Electrical Machines (ICEM)
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تاريخ الإنعقاد:
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3-6/09/2018
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مكان
الإنعقاد:
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Alexandropoulos, Greece
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طبيعة المشاركة:
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Paper presentation
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عنوان المشاركة:
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A New Configuration Of A Consequent Pole Linear Vernier Hybrid
Machine With V-Shape Magnets
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ملخص المشاركة:
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This paper proposes a new flux
concentrated version of a consequent pole linear Vernier hybrid permanent
magnet machine. The Vernier hybrid machine stator has alternatively
magnetised adjacent magnets directly in contact with each other. A salient
rotor then switches the direction of flux past the stator coils. Alternate
magnets can be removed to make the consequent pole version, where inset
rectangular magnets are magnetized in a common direction and separated by
soft magnetic poles. In a flux concentrated consequent pole configuration,
each magnet pole comprises of two magnets forming a V -shape. This topology
hence possesses a combination of consequent poles, flux concentration and
flux switching machine topologies. Magnetic flux concentration increases the
airgap flux density, which potentially leads to an improvement of the force
density and operating power factor. This paper compares the inset and V
-shape consequent pole topologies using finite element analysis simulations.
Both machines have the same dimensions, magnet volume, rated speed and
current density. The simulation results imply that the V-shape machine offers
higher electromagnetic performance. To confirm this, two linear prototypes
are currently under construction, where the key parts that already produced are
presented in this paper.
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الرابط:
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Click here
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المؤتمر (4):
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عنوان المؤتمر:
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2018 XIII International Conference On Electrical Machines (ICEM)
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تاريخ الإنعقاد:
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3-6/09/2018
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مكان
الإنعقاد:
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Alexandropoulos, Greece
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طبيعة المشاركة:
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Paper presentation
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عنوان المشاركة:
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Development And Testing Of A Novel Cylindrical
Permanent Magnet Linear Generator
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ملخص المشاركة:
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Vernier hybrid machines are
known for their simple salient translator structure and inherent magnetic
gearing, making them a strong candidate for low speed, high force
applications. As the armature coil and the magnets are both mounted on the
stator, linear versions of this machine are attractive for high amplitude
systems. In most configurations, single sided or double sided flat cross
sections are considered, giving a two dimensional flux path. In this paper, a
cylindrical variant of the double sided configuration is presented, where the
flux path is now three dimensional. Guiding operating equations are given as
well as the three dimensional finite element analysis (FEA) used to design a
prototype. Details and test results of a soft magnetic composite (SMC) based
laboratory prototype for a cylindrical Vernier hybrid machine are given which
demonstrate the concept and validate the simulation results.
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الرابط:
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Click here
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المؤتمر (5):
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عنوان المؤتمر:
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20th International
Conference On Electrical Machines And Systems (ICEMS)
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تاريخ الإنعقاد:
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11-14/08/2017
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مكان
الإنعقاد:
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Sydney, NSW, Australia
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طبيعة المشاركة:
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Paper presentation
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عنوان المشاركة:
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An Investigation Of A Linear Flux Switching Machine
With Tapered Ferromagnetic Poles
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ملخص المشاركة:
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This paper investigates methods
of magnet mass reduction in linear flux switching permanent magnet (LFSPM)
machines by introducing tapered consequent poles. Based on the finite element
analysis (FEA) three different models are designed, investigated and compared.
The obtained results indicate that by adopting the proposed tapered
ferromagnetic poles a considerable saving of material cost and weight is
obtained without sacrificing the machine performance.
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الرابط:
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Click here
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المؤتمر (6):
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عنوان المؤتمر:
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20th International Conference On Electrical Machines And Systems
(ICEMS)
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تاريخ الإنعقاد:
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11-14/08/2017
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مكان
الإنعقاد:
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Sydney, NSW, Australia
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طبيعة المشاركة:
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Paper presentation
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عنوان المشاركة:
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Investigation Of A Doubly
Salient Halbach Array Linear Permanent Magnet Machine For Wave Energy
Converters
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ملخص المشاركة:
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In this paper a novel E-core
Linear Variable Reluctance Vernier Hybrid Permanent Magnet (LVR-VHPM) machine
with inherent magnetic gearing is proposed for use in the long stroke
application of a wave energy converter. The proposed topology is a combination
of a doubly salient flux reversal machine, a consequent pole machine and a
surface mounted Halbach array Permanent Magnet (PM) machine. The stator teeth
interact with horizontally and vertically magnetized PM and ferromagnetic
poles in such a way as to maximize the flux density in the machine by
minimizing flux leakage. The translator is segmented to ensure the most
effective use of material for minimum mass. A performance comparison study
between the novel LVR-VHPM machine, a baseline linear Vernier Hybrid
Permanent Magnet (VHPM) machine, a linear Halbach VHPM machine and a linear
Consequent pole VHPM machine is used to show that the best result is achieved
by the combined topology. All four designs consist of the same double sided
E-core stators, segmented translators and an equal magnet mass.
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الرابط:
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Click here
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المؤتمر (7):
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عنوان المؤتمر:
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European Wave And Tidal Energy
Conference – EWTEC 2017
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تاريخ الإنعقاد:
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27/08/2017-01/09/2017
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مكان
الإنعقاد:
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Cork. Ireland
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طبيعة المشاركة:
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Paper presentation
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عنوان المشاركة:
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Electric Machine Design For Wave
Energy Converters
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ملخص المشاركة:
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Direct Drive Wave Energy has a
unique set of requirements for an ideal power take off. The slow speed reciprocating
nature of many primary movers leads designers to use either intermediate
mechanical systems or force dense machine types. There is a play off between
electrical machine capital cost, mass, efficiency, force ripple and power
factor. This paper presents the development of a case study wave energy
device and uses it as the basis to assess a number of machine topologies for
use as the direct drive power take off. The aim is that it can be used to aid
future electrical machine design studies for other devices.
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الرابط:
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Click here
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المؤتمر (8):
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عنوان المؤتمر:
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2017 IEEE Region 10 Humanitarian Technology Conference
(R10-HTC)
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تاريخ الإنعقاد:
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21-23/12/2017
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مكان
الإنعقاد:
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Dhaka, Bangladesh
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طبيعة المشاركة:
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Paper presentation
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عنوان المشاركة:
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Interior Permanent Magnet
Synchronous Machine (IPMSM) Design For Environment Friendly Hybrid Electric
Vehicle (HEV) Applications
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ملخص المشاركة:
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The Interior Permanent Magnet
Synchronous Machine (IPMSM) is becoming an integral part in Hybrid Electric
Vehicle (HEV) applications due to their excellent performance, fast
development and environment friendliness. While depending on the rare earth
magnet materials and rotor structure for the dynamic characteristics, they
are very useful in high speed application especially for variable speed
drives. This paper is about designing Interior Permanent Magnet (IPM) motors
for hybrid electric car application with fractional slot pole combination in
order to achieve maximum efficiency with lowest possible costing. It
additionally incorporates imperative assumptions and estimations of machine
parameters that can be utilized for genuine machine outline. Two IPM machines
have been designed, simulated and analyzed by 2D Finite Element analysis
(FEA) for lowest possible torque ripple, iron loss, cogging torque and
harmonic distortion. Optimized back EMF, cogging torque, rated torque,
machine volume, pricing and other simulation results are compared for both
the machine. Finally the study ends up with the selection of the better
machine with respect to the efficiency, size, torque ripple and cost
effectiveness.
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الرابط:
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Click here
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المؤتمر (9):
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عنوان المؤتمر:
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7th International Conference On Renewable Power Generation (RPG
2018)
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تاريخ الإنعقاد:
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26-27/09/2018
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مكان
الإنعقاد:
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Copenhagen, Denmark
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طبيعة المشاركة:
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Paper presentation
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عنوان المشاركة:
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An Investigation Into Linear
Generators With Integrated Magnetic Gear For Wave Energy Power Take Off
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ملخص المشاركة:
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This work presents a new wave
energy converter power take off system that combines two recent developments
in drive train technology, the consequent pole linear Vernier hybrid
permanent magnet machine and the linear magnetic gear. The combined system is
fully realised in 3D FEM and compared to a similar direct drive machine.
While the resulting system is lighter, reducing the active material mass by
30%, and more efficient, the system requires larger amounts of high cost
permenant magnet material and increased power take off complexity. It is
summarised that while such a system could be recomended in certain
conditions, it is not viable for general application.
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الرابط:
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Click here
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المؤتمر (10):
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عنوان المؤتمر:
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7th International Conference On Renewable Power
Generation (RPG 2018)
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تاريخ الإنعقاد:
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26-27/09/2018
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مكان
الإنعقاد:
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Copenhagen, Denmark
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طبيعة المشاركة:
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Paper presentation
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عنوان المشاركة:
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Development of a Linear Vernier
Machine with Low Translator Mass for Wave Energy Power Takeoff
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ملخص المشاركة:
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This paper presents a Linear
Variable Reluctance Permanent Magnet (LVRPM) machine where the armature
winding and inset Halbach array Permanent Magnets (PMs) are mounted on E-core
stators. The Halbach array consists of a vertically magnetised PM pole and a
salient ferromagnetic iron pole (split teeooth) sandwiched between two
horizontal PMs. The segmented translator consists solely of laminations with
salient iron poles. As a variable reluctance machine, it exhibits inherent
magnetic gearing and a higher force and power density than the conventional
synchronous PM machines. Finite Element Analysis (FEA) has been used to
investigate the effect of machine parameters. The logical development of the
LVRPM from the more conventional Vernier Hybrid machine is presented,
including a nearly 50% reduction in magnetic flux leakage and a higher flux
per unit magnet mass.
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الرابط:
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Click here
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المؤتمر (11):
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عنوان المؤتمر:
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THE 12TH INTERNATIONAL SYMPOSIUM
ON LINEAR DRIVES FOR INDUSTRY APPLICATIONS LDIA2019
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تاريخ الإنعقاد:
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1-3/07/2019
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مكان
الإنعقاد:
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NEUCHÂTEL, SWITZERLAND
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طبيعة المشاركة:
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Paper presentation
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عنوان المشاركة:
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Electric drive train design for wave energy converters
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ملخص المشاركة:
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This paper reports on the results of a
project to develop the drive train for a wave energy converter – consisting
of a linear generator and a power converter. Two power converters and a
number of small scale linear machines have been designed, built and tested in
the laboratory. A variety of simulated and laboratory results are presented
and a summary of project findings described.
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الرابط:
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