Aerospace & Defense Technology - October 2022 - 12

Overcoming eVTOL's
High-Power
Connectivity
Challenges
T
12
here's no question that significant amounts of
power are needed for electric-powered vertical
takeoff and landing (eVTOL) aircraft to become
airborne and maintain flight. But designers of
rotorcraft and personal air vehicles (PAVs) have many questions
about what kinds of electrical interconnects can handle
the required voltages and kW peak output for electric
propulsion motors, inverters, controllers, batteries, infotainment,
and sensors. To make eVTOL a reality, designers
must identify the proper connectivity solution and implement
a " follow-the-wire " design approach to overcome the
following challenges:
Electrical Challenges
(1) Preventing partial electrical discharge - Designers
need to minimize corona effects, voids and cavities that may
cause insulation breakdown and electrical treeing.
Managing high voltage (HV) in the air is more complicated
than on the ground. HV can ionize surrounding air, which
then becomes conductive to produce a corona discharge.
The corona effect is responsible for electrical power losses
through voids, cavities, and electrical treeing. A self-sustaining
ionizing discharge can initiate electrical arcing, potentially
igniting a fire.
Selecting materials with dielectric properties suited to HV
conditions - such as corona-resistant polytetrafluoroethylene
(PTFE) - can minimize risks of corona discharge due to
insulation breakdown.
(2) Encountering critical voltage stresses - Designers need
to use appropriate techniques that protect against different
voltage gradients.
Different techniques are used to protect conductor parts
depending on the characteristics and strength (voltage gradient)
of the electrical field around conductors (Figure 1).
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Aerospace & Defense Technology, October 2022

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Aerospace & Defense Technology - October 2022

Table of Contents for the Digital Edition of Aerospace & Defense Technology - October 2022

Aerospace & Defense Technology - October 2022 - Intro
Aerospace & Defense Technology - October 2022 - Sponsor
Aerospace & Defense Technology - October 2022 - Cov1
Aerospace & Defense Technology - October 2022 - Cov2
Aerospace & Defense Technology - October 2022 - 1
Aerospace & Defense Technology - October 2022 - 2
Aerospace & Defense Technology - October 2022 - 3
Aerospace & Defense Technology - October 2022 - 4
Aerospace & Defense Technology - October 2022 - 5
Aerospace & Defense Technology - October 2022 - 6
Aerospace & Defense Technology - October 2022 - 7
Aerospace & Defense Technology - October 2022 - 8
Aerospace & Defense Technology - October 2022 - 9
Aerospace & Defense Technology - October 2022 - 10
Aerospace & Defense Technology - October 2022 - 11
Aerospace & Defense Technology - October 2022 - 12
Aerospace & Defense Technology - October 2022 - 13
Aerospace & Defense Technology - October 2022 - 14
Aerospace & Defense Technology - October 2022 - 15
Aerospace & Defense Technology - October 2022 - 16
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Aerospace & Defense Technology - October 2022 - 18
Aerospace & Defense Technology - October 2022 - 19
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Aerospace & Defense Technology - October 2022 - 33
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Aerospace & Defense Technology - October 2022 - 35
Aerospace & Defense Technology - October 2022 - 36
Aerospace & Defense Technology - October 2022 - 37
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Aerospace & Defense Technology - October 2022 - 39
Aerospace & Defense Technology - October 2022 - 40
Aerospace & Defense Technology - October 2022 - 41
Aerospace & Defense Technology - October 2022 - 42
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Aerospace & Defense Technology - October 2022 - 45
Aerospace & Defense Technology - October 2022 - 46
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Aerospace & Defense Technology - October 2022 - 48
Aerospace & Defense Technology - October 2022 - Cov3
Aerospace & Defense Technology - October 2022 - Cov4
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