Magnetics Business & Technology - July/August 2019 - 13
FEATURE ARTICLE
devices produce a large change in resistance in small
magnetic fields. Sensors are available in Wheatstone
bridge analog versions, and TMR-based "smart sensors"
with Serial Peripheral Interfaces (SPI) were recently announced.
About the Author
Daniel A. Baker has been president
of NVE Corporation, a leader in TMR
magnetic sensors, since 2001. He has
more than 40 years of industry experience and has a B.S. in engineering
from Case Western Reserve University
and a Ph.D. in engineering from the
University of Minnesota. He can be
reached at sensor-apps@nve.com.
TMR sensors are more sensitive and have wider operating field ranges than Hall-effect sensors. They operate
with fields as low as 1.5 millitesla (15 oersteds) and
are still accurate at much higher fields. This broad field
range allows wide mechanical latitude, and compatibility with inexpensive ferrite magnets over a large temperature range despite ferrite's relatively large loss of
strength with temperature.
Popular Magnets
The following table summarizes popular diametricallymagnetized magnets angle sensing depending on size,
spacing, temperature stability, and cost requirements:
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July/August 2019 * Magnetics Business & Technology
13
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Magnetics Business & Technology - July/August 2019
Table of Contents for the Digital Edition of Magnetics Business & Technology - July/August 2019
Magnetics Business & Technology - July/August 2019
Contents
ABB Powers Tourists to Niagara Falls with First US-Built All-Electric Vessels, Equipped with Both Permanent- Magnet and Inductive-Magnet Thruster Motors
Toyota Develops New Magnet for Electric Motors Aiming to Reduce Use of Critical Rare-Earth Element by Up to 50%
Race to Develop Electric-Powered Autonomous Aircraft Opening New Market for Permanent-Magnet Motors
Tech Tips: The Economics of a Transformer
Editor’s Choice/ Features
Research & Development
Product News
Industry News
Resource Guide
Marketplace/ Advertising Index
Magnetics Business & Technology - July/August 2019 - Magnetics Business & Technology - July/August 2019
Magnetics Business & Technology - July/August 2019 - Cover2
Magnetics Business & Technology - July/August 2019 - Contents
Magnetics Business & Technology - July/August 2019 - Editor’s Choice/ Features
Magnetics Business & Technology - July/August 2019 - 5
Magnetics Business & Technology - July/August 2019 - Toyota Develops New Magnet for Electric Motors Aiming to Reduce Use of Critical Rare-Earth Element by Up to 50%
Magnetics Business & Technology - July/August 2019 - 7
Magnetics Business & Technology - July/August 2019 - 8
Magnetics Business & Technology - July/August 2019 - 9
Magnetics Business & Technology - July/August 2019 - 10
Magnetics Business & Technology - July/August 2019 - 11
Magnetics Business & Technology - July/August 2019 - 12
Magnetics Business & Technology - July/August 2019 - 13
Magnetics Business & Technology - July/August 2019 - Race to Develop Electric-Powered Autonomous Aircraft Opening New Market for Permanent-Magnet Motors
Magnetics Business & Technology - July/August 2019 - 15
Magnetics Business & Technology - July/August 2019 - Research & Development
Magnetics Business & Technology - July/August 2019 - 17
Magnetics Business & Technology - July/August 2019 - Product News
Magnetics Business & Technology - July/August 2019 - 19
Magnetics Business & Technology - July/August 2019 - 20
Magnetics Business & Technology - July/August 2019 - 21
Magnetics Business & Technology - July/August 2019 - Industry News
Magnetics Business & Technology - July/August 2019 - 23
Magnetics Business & Technology - July/August 2019 - 24
Magnetics Business & Technology - July/August 2019 - 25
Magnetics Business & Technology - July/August 2019 - Resource Guide
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Magnetics Business & Technology - July/August 2019 - 28
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Magnetics Business & Technology - July/August 2019 - 35
Magnetics Business & Technology - July/August 2019 - Marketplace/ Advertising Index
Magnetics Business & Technology - July/August 2019 - 37
Magnetics Business & Technology - July/August 2019 - 38
Magnetics Business & Technology - July/August 2019 - Cover3
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