Magnetics Business & Technology - January/February 2023 - 23
TECH TIPS
efficiency over a broad range. Partial load is the most realistic use
case for an electric motor, and tests conducted in an evaluation
prototype created by hyperdrives have shown that a direct-cooled
motor offers approximately twice the power output at peak load
and three times the power output at continuous steady-state operation
compared to a standard, indirect-cooled motor.
Direct cooling comes with new challenges, though, explains hyperdrives,
such as high pressure in the hydraulic cooling system,
sealing the connection joints, insulation properties of the cooling
fluid and manufacturing processes. The general idea is simple but
the real challenge is greater than just replacing conventional wire
by hollow conductor, it notes.
A design using distributed windings is key, says hyperdrives, compared
to concentrated windings as commonly used. Concentrated
windings are fantastic at first glance, it notes. They have short end
windings. They are easy to produce and to assemble. The downside,
however, is that the magnetomotive force of basically all pole
slot combinations creates a vast spectrum of harmonics.
The potential of direct cooling to increase current density is truly
mindboggling, says German engineering firm, hyperdrives.
coolant circulation causing high pressure demand on the pump
side. Solving this challenge has paved the way for the use of hollow
conductors in smaller direct-cooled motors.
The benefits of direct-cooled electrical motors
Direct cooling offers the highest power density for an electric
motor - especially continuous power output -alongside excellent
Winding harmonics produce additional losses, also, noise and
vibration which are a potential killer criteria for many applications
and probably a strong reason why these promising machine
topologies have not made it in the EV mass market so far, says
hyperdrive. Distributed windings, however, have a significantly
lower pole number in relation to motor speed usually, thus, lower
fundamental frequencies.
For more info, see www.luvata.com for the full white paper, and
www.hyperdrives.de.
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January/February 2023 * Magnetics Business & Technology 23
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Magnetics Business & Technology - January/February 2023
Table of Contents for the Digital Edition of Magnetics Business & Technology - January/February 2023
Magnetics Business & Technology - January/February 2023
Editor’s Choice/ Features
Magnetoelastic Torque Sensors from MagCanica Provide Secret Sauce for Race Cars & Aircraft
FormFactor Advances Cryogenic Testing & Magnetic Probing for Quantum Developers
Measurement & Positioning Specialist ELGO Builds Out Line of Sensors for Elevator Safety
Research & Development
Tech Tips
Product News
Industry News
Events Calendar/ Advertising Index
Hprobe Advances Production Testing for Magnetic Semiconductor Devices
Visions
Magnetics Business & Technology - January/February 2023 - Magnetics Business & Technology - January/February 2023
Magnetics Business & Technology - January/February 2023 - Cover2
Magnetics Business & Technology - January/February 2023 - 3
Magnetics Business & Technology - January/February 2023 - Editor’s Choice/ Features
Magnetics Business & Technology - January/February 2023 - 5
Magnetics Business & Technology - January/February 2023 - Magnetoelastic Torque Sensors from MagCanica Provide Secret Sauce for Race Cars & Aircraft
Magnetics Business & Technology - January/February 2023 - 7
Magnetics Business & Technology - January/February 2023 - FormFactor Advances Cryogenic Testing & Magnetic Probing for Quantum Developers
Magnetics Business & Technology - January/February 2023 - 9
Magnetics Business & Technology - January/February 2023 - 10
Magnetics Business & Technology - January/February 2023 - 11
Magnetics Business & Technology - January/February 2023 - 12
Magnetics Business & Technology - January/February 2023 - 13
Magnetics Business & Technology - January/February 2023 - Measurement & Positioning Specialist ELGO Builds Out Line of Sensors for Elevator Safety
Magnetics Business & Technology - January/February 2023 - 15
Magnetics Business & Technology - January/February 2023 - 16
Magnetics Business & Technology - January/February 2023 - 17
Magnetics Business & Technology - January/February 2023 - Research & Development
Magnetics Business & Technology - January/February 2023 - 19
Magnetics Business & Technology - January/February 2023 - 20
Magnetics Business & Technology - January/February 2023 - 21
Magnetics Business & Technology - January/February 2023 - Tech Tips
Magnetics Business & Technology - January/February 2023 - 23
Magnetics Business & Technology - January/February 2023 - Product News
Magnetics Business & Technology - January/February 2023 - 25
Magnetics Business & Technology - January/February 2023 - 26
Magnetics Business & Technology - January/February 2023 - 27
Magnetics Business & Technology - January/February 2023 - Industry News
Magnetics Business & Technology - January/February 2023 - 29
Magnetics Business & Technology - January/February 2023 - 30
Magnetics Business & Technology - January/February 2023 - 31
Magnetics Business & Technology - January/February 2023 - Events Calendar/ Advertising Index
Magnetics Business & Technology - January/February 2023 - 33
Magnetics Business & Technology - January/February 2023 - Visions
Magnetics Business & Technology - January/February 2023 - Cover3
Magnetics Business & Technology - January/February 2023 - Cover4
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