Magnetics Business & Technology - July/August 2022 - 27

PRODUCT NEWS
and as few identical components as possible. The redundant standard
encoders provide diverse signals that are generated completely
independently but can still be correlated. Even the power
supplies are available separately for each sensor unit. The basic
idea behind this, explains the company, is that the different sensor
platforms also react with different sensitivities or insensitivities to
disturbances of any kind and therefore do not fail simultaneously,
so that the associated electronics can reliably detect a possible
failure.
Magnetic resolution is rated at up to 1,024 ppr, with optical resolution
up to 5,000 ppr. There are two versions, both in a 58 mm
housing. The WDGR 58B model is incremental magnetic and
incremental optical, the WDGE 58B is absolute magnetic and
incremental optical.
The company's magnetic encoders work on a noncontact
magnetic scanning principle. A diametral
magnetized magnet is mounted in the stainless-steel
shaft with its backlash-free bearings. If the shaft is
rotated, the magnet and the magnetic field rotate
with it. This change in the magnetic field is detected
and processed by a sensor chip on the printed circuit
board opposite. The evaluation enables signals to
be generated that are 90° phase-shifted as well as a
zero pulse. The downstream electronics conditions
these into high-precision signals and amplifies them
into industrially usable square-wave pulses in HTL
and TTL plus their inverted signals.
netometer with ten times the sensitivity. The ALT023 uses NVE's
revolutionary TMR technology to precisely measure fields from a
few microtesla to 1 millitesla.
The differential bridge outputs are bipolar, meaning positive for a
positive field and negative for an opposite field polarity.
Key ALT023 specifications include high sensitivity, Flexible 0 to
5.5 V supply (no minimum) 20 kiloohm device resistance for low
power, mT linear range, high linearity (<1 % of full-scale), Ultralow
output temperature coefficient, and up to 300 kHz bandwidth.
Applications include non-contact current sensing; motion, speed,
and position control; mechatronics and robotics; and geomagnetic
navigation. For more info, visit www.nve.com .
LET THE
" MAGNET EXPERTS "
HELP
Based in Geisenheim, Germany near Wiesbaden,
Wachendorff develops and manufactures rotary
encoders, engine feedback devices and complete
measuring systems for use in a wide range of serial
production applications for mechanical and plant
engineering.
For more info, see www.wachendorff.de.
NVE Introduces Its Most Sensitive
Sensor Ever
Got a Project Requiring a Custom Magnet or
Magnetic Assembly?
We now have Rapid Prototyping available to meet your needs!
· Experts in Compression Bonded Neodymium Magnets
· Experts in Injection Molded Magnets
· Experts in Hybrid Magnets
· Experts in Magnetic Assemblies
ITAR-Registered
9001:2015
REGISTERED
800.437.8890 or 814.375.9145
NVE has recently introduced its most sensitive magnetometer
sensor to date.
The new ALT023 is a version of the popular ALT025
Tunneling Magnetoresistance (TMR) analog magwww.MagneticsMag.com
July/August
2022 * Magnetics Business & Technology 27
DuBois@BUNTINGMAGNETICS.COM
www.BUNTING-DuBois.COM
http://www.nve.com http://www.wachendorff.de http://www.BUNTING-DuBois.COM http://www.MagneticsMag.com
Magnetics Business & Technology - July/August 2022

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