IEEE Electrification - December 2021 - 65
resistance will be 100× higher than in a tube operated at
1/1000 of the atmospheric pressure but only 40% of the drag
experienced by today's commercial aircraft.
Option 4: Energy-Autonomous Capsule
With a Low-Infrastructure Tube
Even though Zeleros proposes a partially self-propelled
and scalable solution, Transpod is currently the only company
going for a fully energy-autonomous transportation
system (https://www.transpod.com/technology
-demonstrator/). It implies very low construction costs,
which means that if the technology is successful, it can
further improve the profitability and affordability of the
hyperloop. Basically, this type of system configuration is
also the typical system explored in the SpaceX Hyperloop
competition for students. An example of such a conceptual
system is shown in Figure 8. It is worth noting that
SpaceX uses an I-beam track and that Transpod does not
have passive lift skies. In Transpod's technology, the linear
motor is also utilized for levitation, guidance, and braking,
proposing a very challenging all-in-one solution. Moreover,
to cope with the limitations in onboard energy storage,
Transpod proposes a contactless high-speed power
transmission system. The proposed wireless technology
View From Above
dc
N1
Guideway (Secondary)
N2
dc
Inductrack Array
Cross-Sectional View
Capsule (Primary)
Lift Ski
Coil
Double Sided LIM
h
Wood
Back
Iron
Guidance
Aluminum Track
Guideway (Secondary)
w
Figure 8. The energy-autonomous capsule solution implying low-infrastructure needs and less electrification along the track. The concept is
depicted in both view from above and cross-sectionally, respectively. The propulsion system is a short-primary double-sided linear induction motor
(SP-DS-LIM). It is primarily installed on board the capsule, while the track is passive with no active components. The levitation is configured as a
passive EDS system with auxiliary lift-off wheels and no feedback control needed. The concept refers to a similar solution as proposed by Transpod
(https://www.transpod.com/technology-demonstrator/), where the passive lift skis were omitted.
IEEE Electrification Magazine / DECEMBER 2021
65
Back
Iron
Wood
Guidance
Lift Ski
Coil
hc
+
-
+
-
https://www.transpod.com/technology-demonstrator/
https://www.transpod.com/technology-demonstrator/
https://www.transpod.com/technology-demonstrator/
IEEE Electrification - December 2021
Table of Contents for the Digital Edition of IEEE Electrification - December 2021
IEEE Electrification - December 2021 - Cover1
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