ADI’s ADA4571 sensor directly measures the shaft position in
brushless DC motors, reducing noise and optimizing motor smoothness and
torque in automotive and industrial applications.
Company Website:
http://www.analog.com
NORWOOD, Mass. -- (Business Wire)
Analog Devices, Inc. (NASDAQ: ADI) introduced today the industry’s
highest precision, highest speed magnetic
angle sensor. The high-resolution ADA4571 sensor is four times more
accurate (0.5° max), 60 percent faster and uses 40 percent less power
than competing angle sensors.
The ADA4571 directly measures
motor position to reduce noise, optimize smoothness and torque
performance, and help designers of brushless DC (BLDC) motors meet
tighter environmental, noise and energy requirements. The new sensor is
automotive qualified and integrates a custom mixed-signal signal
conditioning IC and sensing element based on Anisotropic
Magneto-Resistive (AMR) technology. The new sensor enables direct,
non-contact and wear-free angle measurement in a range of motor
applications, including automotive systems such as electric
power-assisted steering, braking, active suspension and stability
control.
The integrated AMR and precision signal conditioning technology allows
the ADA4571 to operate independently of magnet drifts due to lifetime,
thermal influences or mechanical stress, which enables high-accuracy
readouts in harsh environments.
High accuracy position feedback information enables more effective
commutation of the motor and better control of torque and speed
performance especially in low RPM applications. The new sensor also
enables high-speed motor operation up to 50,000 RPM while the direct
angle measurement principle reduces the effects of vibration and noise
that can degrade motor performance. Better torque control improves motor
efficiency, lowers emissions and heat and extends operating life.
Additionally, the low phase delay (2µs) enables fast closed loop control
and improves responsiveness in high-dynamic applications such as
industrial servo motors, robotics and electric power steering.
The ADA5471 runs on a 2.7- to 5.5-V supply, consumes just 6.5 mA of
power, and includes a low-power sleep mode that expands application
usage to remotely powered systems. Additionally, the sensor does not get
damaged under high magnetic field conditions and has negligible
hysteresis; while the low temperature and lifetime drift performance
reduces or eliminates the need for calibration. The sensor also supports
advanced diagnostics for use in high availability and safety critical
applications.
ADA4571 Magnetic Angle Sensor Key Features
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Low angular error: 0.5° max
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High speed: 50,000 RPM with a 2µs phase delay
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Low noise: 500 uVrms
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Low power: 6.5 mA
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-40°C to 150°C operation
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About Analog Devices
Innovation, performance, and excellence are the cultural pillars on
which Analog Devices has built one of the longest standing, highest
growth companies within the technology sector. Acknowledged
industry-wide as the world leader in data conversion and signal
conditioning technology, Analog Devices serves over 60,000 customers,
representing virtually all types of electronic equipment. Celebrating
over 40 years as a leading global manufacturer of high-performance
integrated circuits used in analog and digital signal processing
applications, Analog Devices is headquartered in Norwood, Massachusetts,
with design and manufacturing facilities throughout the world. Analog
Devices' is included in the S&P 500 Index.
EngineerZone is a trademark of Analog Devices, Inc.
Follow ADI on Twitter at http://www.twitter.com/ADI_News
To subscribe to Analog Dialogue, ADI's monthly technical journal, visit: http://www.analog.com/subscribe.
Photos/Multimedia Gallery Available: http://www.businesswire.com/multimedia/home/20141028005003/en/
Contacts:
Analog Devices Inc.
Sarah Shieh, 781-937-2572
sarah.shieh@analog.com
or
Porter
Novelli
Andrew MacLellan, 617-897-8270
andrew.maclellan@porternovelli.com
Source: Analog Devices, Inc.
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