Ultra-thin magnetic rotors with carbon fiber wrapping technology
With the increasing request in the efficiency of electric motors, rotating machines with permanent magnets, which are placed on the rotor, are becoming more common.
The principle of permanent magnet synchronous motors (PMSM) is based on the interaction of the fixed magnetic field of the rotor with the rotating magnetic field of the stator, generated by the bonded permanent magnets. These motors are more efficient than asynchronous machines, delivering the same or more power in a smaller space.
Our rotors with permanent magnets bonded to the rotor surface (SPM) and bandaged with carbon fiber increase the mechanical properties of the SPM rotor, achieving operating speeds above 10,000 RPM.
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Energy efficiency
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Specific power
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Rotational inertia
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Flux losses
A unique combination in the production of rotors for electric motors
NESTECH integrates its long experience in the manufacturing of laminated cores for electric motors and generators with the know-how of CARBONVENETA, a leader in composite materials, creating a unique combination.
Founded and developed within CARBONVENETA, NESTECH holds a deep know-how about carbon fiber and its technical applications incomparable in the European industrial scene.
Thanks to an internal stock with a very wide selection of fibers, all supported by the relevant performance certifications, NESTECH guarantees the possibility of obtaining the most diverse TENSILE STRENGTH and ELASTIC MODULUS values.
The composite application technology responds to the increasing demand of electric motors with high efficiency, ensuring concrete energy savings and top control of mechanical stresses.
A unique combination in the production of rotors for electric motors
NESTECH integrates its long experience in the manufacturing of laminated cores for electric motors and generators with the know-how of CARBONVENETA, a leader in composite materials, creating a unique combination.
Founded and developed within CARBONVENETA, NESTECH holds a deep know-how about carbon fiber and its technical applications incomparable in the European industrial scene.
Thanks to an internal stock with a very wide selection of fibers, all supported by the relevant performance certifications, NESTECH guarantees the possibility of obtaining the most diverse TENSILE STRENGTH and ELASTIC MODULUS values.
The composite application technology responds to the increasing demand of electric motors with high efficiency, ensuring concrete energy savings and top control of mechanical stresses.
Carbon fiber performance table
Technical and mechanical properties of carbon fiber
| Thousands of fibers [ K ] |
Single fiber diameter [ μm ] |
Total yarn section [ mmq ] |
Elastic Modulus [GPa] |
Tensile strength [MPa] [N/mmq] |
Elongation % |
Density [g/cm3] |
|
|---|---|---|---|---|---|---|---|
| 24 | K | 7,0 | 0,9236282 | 234 | 4.830 | 2,00% | 1,80 |
| 18 | K | 6,2 | 0,5490568 | 250 | 5.300 | 2,10% | 1,82 |
| 24 | K | 4,8 | 0,4342938 | 395 | 4.600 | 1,20% | 1,79 |
| 12 | K | 6,0 | 0,3392920 | 375 | 4.410 | 1,10% | 1,82 |
| 12 | K | 8,9 | 0,7465367 | 385 | 3.100 | 2,05% | 2,05 |
| 24 | K | 5,5 | 0,5701991 | 293 | 6.120 | 1,90% | 1,75 |
| 50 | K | 7,2 | 2,0357520 | 242 | 4.100 | 1,70% | 1,81 |
| 24 | K | 7,0 | 0,9236282 | 250 | 5.500 | 2,20% | 1,80 |
Carbon fiber performance table
Technical and mechanical properties of carbon fiber
| Thousands of fibers [ K ] |
Single fiber diameter [ μm ] |
Total yarn section [ mmq ] |
Elastic Modulus [GPa] |
Tensile strength [MPa] [N/mmq] |
Elongation % |
Density [g/cm3] |
|
|---|---|---|---|---|---|---|---|
| 24 | K | 7,0 | 0,9236282 | 234 | 4.830 | 2,00% | 1,80 |
| 18 | K | 6,2 | 0,5490568 | 250 | 5.300 | 2,10% | 1,82 |
| 24 | K | 4,8 | 0,4342938 | 395 | 4.600 | 1,20% | 1,79 |
| 12 | K | 6,0 | 0,3392920 | 375 | 4.410 | 1,10% | 1,82 |
| 12 | K | 8,9 | 0,7465367 | 385 | 3.100 | 2,05% | 2,05 |
| 24 | K | 5,5 | 0,5701991 | 293 | 6.120 | 1,90% | 1,75 |
| 50 | K | 7,2 | 2,0357520 | 242 | 4.100 | 1,70% | 1,81 |
| 24 | K | 7,0 | 0,9236282 | 250 | 5.500 | 2,20% | 1,80 |
The technical challenge:
containing the centrifugal force
- A magnet rotating on the outer surface of a rotor develops a centrifugal force proportional to the square of the angular velocity
- The air gap between rotor and stator must be reduced to a minimum
- The mass must be very small
- The tensile strength of the fiber must be extremely high
Carbon fiber layer is the solution to all the above-mentioned points.
Thanks to its high strength-to-weight ratio, carbon fiber becomes the ideal material for the reinforcing high-speed rotors for electric motors.
LOW POWER FOR HIGH PRECISIONS
Cutting-edge technology
Our laser machines are equipped with a fiber source customized to our specifications, with a very small diameter laser beam. Such a thin laser beam allows the manufacturing of very complex details with extreme accuracy and precision. Furthermore, the power is so low that it minimizes heat immission to the metal during the cutting process.
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Linear motor and different application stacks
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