Magnetics Business & Technology - January/February 2021 - 11

FEATURE ARTICLE

No end windings

Technology explained

The Hunstable Electric Turbine (HET) is an exterior
permanent magnet circumferential flux 4 rotor machine, explains Linear Labs. Descriptions about it include the following details from the company. Innovative concepts are introduced in the magnetic structure
and operation at the core of the HET, resulting in large
amount of torque generation, it says.
The HET's circumferential three-dimensional
magnetic architecture
yields a 3D flux path and
produces four active
torque producing areas
with all sides having the
same polarity. As much
as 30% of the typical
copper needed is reduced by eliminating end
windings and having all the copper involved in torque
production. The architecture of the HET ensures all
magnetic and electrical fields are fully involved in
torque production.
The design requires no unproductive volume. Only the air
gaps surrounding the poles are
left open. The HET produces a
large Lorentz force component
and a large reluctance force
that peak simultaneously.
An important thing to note is
that by extending the length of the magnetic tunnel
region, the torque that is present throughout the coils
travels without regard to the coils at pole face length.
Unlike existing conventional machines where torque
is only present at an optimum point as it approaches a
magnetic pole, the HET has no single optimum point
but rather all positions exhibit maximum torque.
Manufacturing cost is reduced by no wasted copper
due to the absence of end windings, minimal electrical
steel waste, minimal touch labor and the ability to use
ferrite magnet rather than rare-earth magnets.

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January/February 2021 * Magnetics Business & Technology

11


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Magnetics Business & Technology - January/February 2021

Table of Contents for the Digital Edition of Magnetics Business & Technology - January/February 2021

Magnetics Business & Technology - January/February 2021
Editor’s Choice/ Features
eTrucks and eBuses with Permanent Magnet Powertrains Charge into Commercial Vehicle Market
Linear Labs Rolls Toward Production of Its Magnetic Flux Tunnel Motors
Protean Electric’s In-Wheel Motor Reaches for Traction in Global EV and Industrial Markets
Embedding Magnetics Achieves Reliability & Consistency, Part 3 of 3
Tech Tips
Research & Development
Product News
Industry News
Events Calendar/ Advertising Index
Visions
Magnetics Business & Technology - January/February 2021 - Magnetics Business & Technology - January/February 2021
Magnetics Business & Technology - January/February 2021 - Cover2
Magnetics Business & Technology - January/February 2021 - 3
Magnetics Business & Technology - January/February 2021 - Editor’s Choice/ Features
Magnetics Business & Technology - January/February 2021 - 5
Magnetics Business & Technology - January/February 2021 - eTrucks and eBuses with Permanent Magnet Powertrains Charge into Commercial Vehicle Market
Magnetics Business & Technology - January/February 2021 - 7
Magnetics Business & Technology - January/February 2021 - 8
Magnetics Business & Technology - January/February 2021 - 9
Magnetics Business & Technology - January/February 2021 - Linear Labs Rolls Toward Production of Its Magnetic Flux Tunnel Motors
Magnetics Business & Technology - January/February 2021 - 11
Magnetics Business & Technology - January/February 2021 - Protean Electric’s In-Wheel Motor Reaches for Traction in Global EV and Industrial Markets
Magnetics Business & Technology - January/February 2021 - 13
Magnetics Business & Technology - January/February 2021 - 14
Magnetics Business & Technology - January/February 2021 - 15
Magnetics Business & Technology - January/February 2021 - Tech Tips
Magnetics Business & Technology - January/February 2021 - 17
Magnetics Business & Technology - January/February 2021 - Research & Development
Magnetics Business & Technology - January/February 2021 - 19
Magnetics Business & Technology - January/February 2021 - Product News
Magnetics Business & Technology - January/February 2021 - 21
Magnetics Business & Technology - January/February 2021 - 22
Magnetics Business & Technology - January/February 2021 - 23
Magnetics Business & Technology - January/February 2021 - 24
Magnetics Business & Technology - January/February 2021 - 25
Magnetics Business & Technology - January/February 2021 - Industry News
Magnetics Business & Technology - January/February 2021 - 27
Magnetics Business & Technology - January/February 2021 - 28
Magnetics Business & Technology - January/February 2021 - 29
Magnetics Business & Technology - January/February 2021 - 30
Magnetics Business & Technology - January/February 2021 - 31
Magnetics Business & Technology - January/February 2021 - Events Calendar/ Advertising Index
Magnetics Business & Technology - January/February 2021 - 33
Magnetics Business & Technology - January/February 2021 - Visions
Magnetics Business & Technology - January/February 2021 - Cover3
Magnetics Business & Technology - January/February 2021 - Cover4
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