dc.contributor.advisor |
Pyrhonen, Juha; supervisor de grado |
es |
dc.contributor.advisor |
Tapia Ladino, Juan; supervisor de grado |
es |
dc.contributor.author |
Hoffer Garcés, Alvaro Ernesto |
es |
dc.date.accessioned |
2021-12-20T19:01:45Z |
|
dc.date.available |
2021-12-20T19:01:45Z |
|
dc.date.issued |
2021 |
|
dc.identifier.uri |
http://repositorio.udec.cl/jspui/handle/11594/8823 |
|
dc.description |
Tesis para optar al grado de Doctor en Ciencias de la Ingeniería con mención en Ingeniería Eléctrica. |
es |
dc.description.abstract |
In recent years, permanent magnet synchronous machines (PMSM) have gained
popularity owing to their excellent performance compared with other kinds of electrical
machines in numerous applications. Furthermore, advances in power electronics, digital
signal processing, control schemes, and the development of electrical materials have
contributed to the rapid development of PMSMs. Nowadays, designers of electrical
machines investigate the PMSM to improve its performance and reliability by reducing
the amount of materials while minimizing its cost. In this doctoral dissertation, a study is
presented to improve the performance of a PMSM using asymmetric characteristics. The
study aims to employ unequal teeth widths without changing the size of the machine to
increase the winding factor and thus be able to increase the value of the induced voltage
and the electromagnetic torque. The exploitation of this asymmetry is possible because
of the tooth-coil winding (TCW), which has multiple advantages from both the
electromagnetic and the manufacturing point of view.
A submersible application consists of a scenario where the devices are operated in
underwater environments, such as harvesting marine energy or a water pumping
system. These applications require an electrical machine to be corrosion resistant, which
makes its design and manufacture challenging. Currently, there are various submersible
machines. The best known is the canned PMSM, whose stator and rotor are protected
with cans, and whose active parts are made of traditional electrical materials, enabling
water to flow through the air gap. However, a completely encapsulated traditional stator
is a complex structure and has low heat transfer characteristics. In this doctoral
dissertation, a stainless core submersible PMSM is presented as an alternative to the
conventional submersible machine. The machine under study consists of a fully stainless
stator, and a rotor-surface permanent magnet rotor, protected by a fiberglass
cover. Ferritic stainless steel is used as stator core material, and the winding is made of
polyvinyl chloride (PVC) insulated solid-conductor wire.
To test the asymmetric characteristic of the stator and verify the functionality of the
proposed submersible machine, a 1.7 kW, 80 r/min, 24-slot 20-pole fully submersible
PMSM was simulated, constructed, and verified in a water tank and in a lake with fresh
water. The analytical and the finite element method (FEM) results showed that it was
possible to improve the machine performance by employing unequal teeth. This
improvement was reflected in an 8% increase in the value of the induced voltage
compared with the symmetric machine. However, the use of ferritic stainless steel
showed that the stator core losses correspond to 40% of the total losses of the machine,
indicating that the efficiency was 74% at the rated load. Despite this, the machine turned out to be functional. |
es |
dc.language.iso |
spa |
es |
dc.publisher |
Universidad de Concepción. |
es |
dc.rights |
Creative Commoms CC BY NC ND 4.0 internacional (Atribución-NoComercial-SinDerivadas 4.0 Internacional) |
|
dc.rights.uri |
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es |
|
dc.subject |
Imanes Permanentes |
|
dc.subject |
Método de Elementos Finitos |
|
dc.subject |
Bombas Sumergibles |
|
dc.subject |
Maquinaria Hidráulica |
|
dc.title |
Submersible permanent-magnet synchronous machine with a stainless core and unequal teeth widths = Maquina síncrona de imán permanente sumergible con núcleo de acero inoxidable y anchos de dientes desiguales. |
es |
dc.title.alternative |
Maquina síncrona de imán permanente sumergible con núcleo de acero inoxidable y anchos de dientes desiguales. |
es |
dc.type |
Tesis |
es |
dc.description.facultad |
Departamento de Ingeniería Eléctrica |
es |
dc.description.departamento |
Departamento de Ingeniería Eléctrica. |
es |