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[Notes] * Information on this page is current on the date of press release. * AKM is trademark of Asahi Kasei Microdevices Corporation in Japan, Europe and the United States. * Appellations, company names and product names on this page are trademarks or registered trademarks of respective companies.
AKM releases a 14-bit magnetic rotation angle sensor of ±0.1º angle accuracy that supports off-axis configuration
2022/05/09
Description
Asahi Kasei Microdevices Corporation (AKM) has released the AK7455, a magnetic rotation angle sensor IC that supports off-axis configurations, where the sensor is not located on the rotation axis of the magnet.
The AK7455's specific calibration function enables high accuracy angle detection of ±0.1º (typ.) in both shaft-end and off-axis configurations.
Enabling change of the bandwidth setting of the angle calculation circuit, the AK7455 has achieved improved responsiveness during motor acceleration and deceleration.
Off-Axis arrangement
Shaft-End arrangement
Features
Supports off-axis configuration
In addition to shaft-end configuration, off-axis configuration is also available, where ICs are placed next to the two-pole magnetized magnets, allowing for greater flexibility in designing.
Off-axis arrangement allows for thinner dimensions. In addition, by configuring a motor system of the hollow structure type, the space can be saved through wiring in the hollow.
Angle error calibration function
The AK7455 has 1st to 4th order calibration parameters. By writing those parameters to an internal EEPROM, an angle accuracy of ±0.1º (typ.) can be achieved in both shaft-end and off-axis configurations.
Improves responsiveness to motor acceleration/deceleration
By allowing the setting of the cutoff frequency of the LPF that is installed in the angle calculation circuit inside of the IC to a wide bandwidth, the AK7455 has improved the responsiveness to motor acceleration and deceleration and has enabled smooth motor control.
Applications
Motor control applications
- Industrial robots and electric actuators
- Machine tools, textile machinery, and industrial sewing machines
- Stepping motors and DC brushless motors
