Automotive Engineering - March 2022 - 7

TECHNOLOGY REPORT
to the Saietta portfolio, which will help
the company to realize its desire to
produce electric drive systems for
trucks and buses.
The e-axle designed by e-Traction
has the inverter packaged within the
drive motors. Kist described it as " a
fairly standard outrunner motor " but
with direct drive, similar to Saienna's
AFT philosophy.
Inside the motor
The first prototypes of the e-Tractiondesigned
e-axle have been built and
tested. The principal components of the
Saietta AFT motor include a pair of
cold-formed, copper hairpin-shaped
coils. " That pair is a discrete coil, which
you can hold in an assembly line so you
can make the entire stator fully automated, "
Kist explained. The stator ring
is extruded and the lamination packs
are of grain-oriented steel. The rotor is
formed from mild steel and the motor is
Saietta CEO Vic Kist with skateboard-type EV chassis.
surrounded by a small cooling jacket.
" Torque is r times force and basically
because our effective diameter is bigger
(compared with a radial-flux motor),
we can achieve a higher torque for
the same current, " he said.
Acquiring the e-axle technology has
accelerated Saietta's plans for powering
heavy vehicles. He had been planning
to work on similar technology with the
aim of introducing the company's own
power electronics in three years.
ICU
HV Connector
(Integrated
Central control Unit)
BFA
HV/LV Wiring Harness
Built-in Cam
Battery Disconnect Unit
(Busbar Frame Assembly)
HV Junction
Block
HV Charging
Coupler
AUTOMOTIVE ENGINEERING
Free Info at http://info.hotims.com/82330-705
March 2022 7
SAIETTA
http://info.hotims.com/82330-705

Automotive Engineering - March 2022

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