| Electric generator (609) |  |
| Electric motor (72) | |
| Electrical machine (12) | |
| Transformer (43) | |
| Electric generator (609) | |
| Electric motor (72) | |
| Electrical machine (12) | |
| Transformer (43) | |
#New nanomaterial introduced into electrical machines Lappeenranta University of Technology in Finland has constructed the world's first prototype electrical motor using carbon nanotube yarn in the motor windings.
In the near future carbon nanotube fibers have potential to significantly enhance the performance and energy efficiency of electrical machines.
Researchers are constantly searching for opportunities to upgrade the performance of electrical machines; to this end one of the objectives is to find higher-conductivity wires for the windings.
If we keep the electrical machine design parameters unchanged and only replace copper with future carbon nanotube wires it is possible to reduce the Joule losses in the windings to half of the present-day machine losses.
and operating of electrical machines. Furthermore the machine dimensions and masses could be reduced. The motors could also be operated in significantly higher temperatures than the present ones says Professor Juha Pyrh nen who has led the design of the prototype at LUT.
No definite upper limit for the conductivity Traditionally the windings in electrical machines are made of copper which has the second best conductivity of metals at room temperature.
Despite the high conductivity of copper a large proportion of the electrical machine losses occur in the copper windings.
According to Pyrhnen the electrical machines are so ubiquitous in everyday life that we often forget about their presence.
In a single-family house alone there can be tens of electrical machines in various household appliances such as refrigerators washing machines hair dryers and ventilators.
There is a significant improvement potential in the electrical machines but we are now facing the limits of material physics set by traditional winding materials.
Superconductivity appears not to develop to such a level that it could in general be applied to electrical machines.
We expect that in the future the conductivity of carbon nanotube yarns could be even three times the practical conductivity of copper in electrical machines.
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